Summary of the BDS and MDI CLIC08 Working Group (2009)
Tomás, R, Adli, E, Ahmed, I, Ambatu, PK, Angal-Kalinin, D, Barlow, R, ...
This note summarizes the presentations held within the Beam Delivery System and Machine Detector Interface working group of the CLIC08 workshop. The written contributions have been provided by the...
Halo and tail simulations with applications to the CLIC drive beam (2009)
Fitterer, M, Müller, S, Adli, E, Burkhardt, H, Dalena, B, Rumolo, G, ...
We report about generic halo and tail simulations and estimates. Previous studies weremainly focused on very high energies as relevant for the beam delivery systems of linear colliders. We have now...
Luminosity Optimization and Calibration in the LHC (2009)
Lamont, M, Alemany-Fernandez, R, Burkhardt, H, White, S
The ability of a particle collider to produce the required number of events, the luminosity, is usually used to size its performances. As demonstrated in many accelerators optimizing and calibrating...
Analysis of the transverse SPS Beam coupling impedance with short and long bunches (2009)
Salvant, B, Calaga, R, De-Maria, R, Arduini, Gianluigi, Burkhardt, H, Damerau, H, ...
The upgrade of the CERN Large Hadron Collider (LHC) would require a four- to fivefold increase of the single bunch intensity presently obtained in the Super Proton Synchrotron (SPS). Operating at...
The Large Hadron-Electron Collider (LHEC) at the LHC (2009)
Zimmermann, F, Bordry, F, Braun, H, Bruning, O, Burkhardt, H, Eide, A, ...
Sub-atomic physics at the energy frontier probes the structure of the fundamental quanta of the Universe. The Large Hadron Collider (LHC) at CERN opens for the first time the ‘terascale’ (TeV...
Study of High Beta Optics Solution for TOTEM (2009)
Burkhardt, H, White, S, Levinsen, Y
The TOTEM experiment requires special high beta optics solutions. We report on studies of optics for an intermediate β* = 90m, as well as a solutions for a very high β* of 1535 m, which respect all...
Submitted to Physics Letters B (2009)
C. Adloff, V. Andreev, B. Andrieu, V. Arkadov, A. Astvatsatourov, I. Ayyaz, ...
Abstract The reaction e+p! e+X is studied with the H1 detector at HERA. The data cover mo-mentum transfers Q2 between 200 GeV2 and 30; 000 GeV2 and correspond to an integratedluminosity of 35:6...
Submitted to Physics Letters (2009)
H Collaboration, C. Adloff, V. Andreev, B. Andrieu, V. Arkadov, A. Astvatsatourov, ...
LHC Workshop on Experimental Conditions and Beam-Induced Detectors Backgrounds (2009)
Alemany-Fernández, R, Burkhardt, H, Ferro-Luzzi, M, Lamont, M, MacPherson, A, Redaelli, S
Jung, H., De Roeck, A., Ajaltouni, Z. J., Albino, S., Altarelli, G., Ambroglini, F., ...
2nd workshop on the implications of HERA for LHC physics. Working groups: Parton Density Functions Multi-jet final states and energy flows Heavy quarks (charm and beauty) Diffraction Cosmic Rays...
Dittmar, M., Forte, S., Glazov, A., Moch, S., Altarelli, G., Anderson, J., ...
We provide an assessment of the state of the art in various issues related to experimental measurements, phenomenological methods and theoretical results relevant for the determination of parton...
1. WG: Parton Density Functions, Introduction 2008-05-26 - 2008-05-30 (2009)
G. Altarelli, DESY Forschung Hochenergiephysik, J. Anderson, R.D. Ball, G. Beuf, ...
Contribution to a conf. proceeding (book/online)
Halo and tail simulations with application to the CLIC drive beam. (2009)
Fitterer, M., Müller, A.S., Adli, E., Burkhardt, H., Dalena, B., Rumolo, G., ...
23rd Particle Accelerator Conf. (PAC09), Vancouver, CDN, May 4-8, 2009
A Storage Ring based Option for the LHeC (2008)
Willeke, F, Bordry, Frederick, Braun, H H, Brüning, Oliver Simon, Burkhardt, H, Chattopadhyay, S, ...
The LHeC aims at the generation of hadron-lepton collisions with center of mass energies in the TeV scale and luminosities of the order of $10^{32}-10^{33} cm^{-2} sec^{-1}$ by taking advantage of...
Energy Loss of Coasting Gold Ions and Deuterons in RHIC (2008)
Abreu, N P, Blaskiewicz, M, Brown, K, Burkhardt, H, Butler, J, Fischer, W, ...
The total energy loss of coasting gold ion beams at two different energies and deuterons at one energy were measured at RHIC, corresponding to a gamma of 75.2, 107.4 and 108.7 respectively. We...
Recent Improvements in the Tracking Code Placet (2008)
Latina, A, Adli, E, Burkhardt, H, Renier, Y, Rumolo, G, Schulte, D, ...
The tracking code Placet has recently undergone several improvements. A redesign of its internal data structures and a new user interface based on the mathematical toolbox Octave considerably...
Optics Flexibility in the LHC at Top Energy (2008)
Aiba, M, Burkhardt, H, Fartoukh, S, Giovannozzi, M, White, S
Flexibility of the LHC optics at top energy has been studied, in terms of betatron tune tunability, mainly for the high-beta optics that requires tunability of the order of half a unit. It has been...
Sammut, N J, White, S M, Burkhardt, H, Giloux, C, Venturini-Delsolaro, W
The superconducting orbit corrector magnets (MCBC, MCBY and MCBX) in the Large Hadron Collider (LHC) at CERN will be used to generate parallel separation and crossing angles at the interaction points...
Beam Scraping to detect and remove Halo in LHC Injection (2008)
Letnes, P A, Pedersen, S, Brielmann, A, Burkhardt, H, Kramer, Daniel
Fast scrapers are installed in the SPS to detect and remove beam halo before extraction of beams to the LHC, to minimize the probability for quenching of superconducting magnets in the LHC. We...
CERN SPS Impedance in 2007 (2008)
Métral, E, Arduini, Gianluigi, Bohl, T, Burkhardt, H, Calaga, R, Caspers, F, ...
Each year several measurements of the beam coupling impedance are performed in both longitudinal and transverse planes of the CERN Super Proton Synchrotron to keep track of its evolution. In...
SIMULATION AND ALGORITHMS (2008)
A. Latina, H. Burkhardt, P. Eliasson, L. Neukermans, J. Resta-lópez, G. Rumolo, ...
PLACET[1] is a program used to simulate the dynamics, including wakefields, of a beam in the main accelerating or decelerating part of a linac. It allows for the investigation of single- and...
Abstract COMPARISON OF DIFFERENT TRACKING CODES FOR BEAM DELIVERY SYSTEMS OF LINEAR COLLIDERS (2008)
S. Redaelli, R. Aßmann, G. A. Blair, H. Burkhardt, D. Schulte
The vertical RMS spot sizes at the interaction point of linear colliders are in the 1 nm to 5 nm range at beam energies from 0.25 TeV to 1.5 TeV. Numerical tracking of particles through the magnetic...
Sandrock, M, Hansel, J, Schulze, J, Schmitz, D, Niess, A, Burkhardt, H, ...
Abstract Background Image-based B-mode ultrasound has gained popularity in major studies as a non-invasive method of measuring cardio- and cerebrovascular risk factors. However, none of the major...
Oscillations in the GSI electron capture experiment (2008)
Burkhardt, H., Lowe, J., Stephenson Jr., G. J., Goldman, T.
In a recent paper, oscillations observed in the electron capture probability were attributed to the mixing of neutrino mass eigenstates. This paper is shown to be in error in two respects.
[10] M. Agrawal and L. Davis.Window-based, discontinuity preserving stereo.In IEEE (2008)
K. Abter, W. Snyder, H. Burkhardt, Affine Invariant, R. Adams, L. Bischof. Seeded, ...
[5] E. Adelson and J. Bergen.Spatiotemporal energy models for the perception of motion.Journal of the Optical Society of America A, 2:284–299, 1985. [6] E. Adelson and J. Movshon.Phonemenal...
INVESTIGATION OF SPACE CHARGE EFFECTS AND INTRABEAM SCATTERING FOR LEAD IONS IN THE SPS (2008)
H. Burkhardt, D. Manglunki, M. Martini, F. Roncarolo (cern, G. Rumolo (gsi
Space charge effects and intrabeam scattering usually play a minor role in high energy machines like the SPS. They can potentially become a limitation for the heavy ion beams needed for the LHC at...
THE LHC LEAD INJECTOR CHAIN (2008)
A. Beuret, J. Borburgh, A. Blas, H. Burkhardt, C. Carli, M. Chanel, ...
A sizeable part of the LHC physics programme foresees lead-lead collisions with a design luminosity of 10 27 cm-2 s-1. This will be achieved after an upgrade of the ion injector chain comprising...
A Storage Ring Based Option for the LHeC (2008)
Willeke, FJ, Bordry, F, Braun, H-H, Brüning, OS, Burkhardt, H, Chattopadhyay, Swapan, ...
Linac-LHC ep Collider Options (2008)
Zimmermann, F, Aksakal, H, Bordry, F, Braun, H-H, Brüning, OS, Burkhardt, H, ...
Mode separation of magnetotelluric responses in three-dimensional environments (2008)
Becken, M., Ritter, O., Burkhardt, H.
Magnetotelluric (MT) responses in complex, 3-D terrains are in general characterized by (i) elliptical polarization states of horizontal electric and magnetic fields; (ii) the non-orthogonality of...
Overall Optics Solutions for Very High Beta in Atlas (2008)
White, S., Burkhardt, H., Puzo, P., Cavalier, S., Heller, M.
An insertion optics with a beta-star of at least 2600 m has been requested by the ATLAS experiment at the LHC. This is very far from the standard LHC physics optics and implies a significant...
Overall Optics Solutions for Very High Beta in Atlas (2008)
White, S., Burkhardt, H., Puzo, P., Cavalier, S., Heller, M.
An insertion optics with a beta-star of at least 2600 m has been requested by the ATLAS experiment at the LHC. This is very far from the standard LHC physics optics and implies a significant...
Overall Optics Solutions for Very High Beta in Atlas (2008)
White, S., Burkhardt, H., Puzo, P., Cavalier, S., Heller, M.
An insertion optics with a beta-star of at least 2600 m has been requested by the ATLAS experiment at the LHC. This is very far from the standard LHC physics optics and implies a significant...
Fulde-Ferrell-Larkin-Ovchinnikov State in Layered Superconductors (2007)
H. Burkhardt, D. Rainer, Fulde Ferrell
The phase diagram of a layered superconductor in a large parallel magnetic field is calculated. This includes a calculation of the lower critical field beyond which the superconductor is in the...
Overview of LEP Operation in 1998 (2007)
Arduini Assmann Bailey, G. Arduini, G. Arduini, R. Assmann, R. Assmann, R. Bailey, ...
After the installation of 32 additional RF cavities in the 1997-1998 shutdown LEP was operated at a beam energy of 94.5 GeV. The total integrated luminosity for the year 1998 clearly surpassed its...
It Was Planned, H. Burkhardt, J. M. Jowett, I. Reichel, G. Von
mp and squeeze (# # x =2m,# # y = 5cm, f0520b98 v1 optics) the total RF voltage was reduced to 374 MV with q s # 0:074 (hardly visible) and an expected bucket half height of 2.25 %. Collimators were...
High Intensity Proton Beams in a Multi-Cycled SPS (2007)
A. Faugier, X. Altuna, R. Bailey, R. Blanchard, T. Bohl, H. Burkhardt, ...
this paper is the combined effort of a very large number of persons in the SL and PS division. It is a pleasure to thank them here. B. Desforges is in charge of the statistics; the editing and...
Camera Calibration Based on 3D-Point-Grid (2007)
Abstract. In this paper an effective technique of camera calibration based on a 3D-point-grid is presented. The properties of structured space points, defined as 3D-point-grid, and their relations...
S. Kroner, R. Moratz, H. Burkhardt
Translation invariant pattern recognition for 1D signals and 2D images can be performed using the nonlinear fast transforms of the class C T. Unfortunately different backgrounds, noise or distortions...
A. Luo, H. Burkhardt, Mikroelektronik Anwendungszentrum, Hamburg Gmbh, Harburger Schlostr
This paper presents a new incremental algorithm for directly estimating depth maps from image sequences, which is based on the modified motion constraint equation. In order to overcome the inherent...
BULKING SLUDGE TREATMENT BY MICROSCOPIC OBSERVATION AND MECHANICAL TREATMENT (2007)
W. Heine, I. Sekoulov, H. Burkhardt, J. Behrendt
By the consideration of the microscopic picture of activated sludge samples it is possible to introduce a further biological parameter apart from the conventional physico-chemical parameters for the...
In this paper we present a robust method for the recognition of 3D landmarks. Firstly the stereo and color information are extracted and combined together to acquire candidate 3D primitives of...
USING INVARIANT FEATURES FOR CONTENT BASED DATA RETRIEVAL (2007)
H. Schulz-mirbach, H. Burkhardt, S. Siggelkow
The paper discusses a region based approach for content based image retrieval. Due to the explosive growth of image databases there is a great need for new methods to handle large amount of data...
H I GHLY CONCENTRATED GAS-SOLID FLOWS BY MEANS OF LASER SHEETS (2007)
V I Sualisat, I On, Of Flow, Phenomena I Nside, U. B. Lackermeier, C. Rudnick, ...
cluster In the present paper an attempt has been made to use the laser sheet method inside a circulating fluidized bed (CFB) which is a highly concentrated gas-solid flow with solids volume...
G Schreiber, S Marshall, H Burkhardt
In this paper a modification of a standard parallel genetic algorithm (SPGA) is introduced which can be run efficiently on different types of parallel computers. The purpose of the algorithm is to...
This paper presents a new algorithm for estimating the 3-D motion and structure from stereo image sequences. In order to overcome the inherent ambiguities of the motion and structure estimation from...
Relating Image Points of 3D Coplanar Point Grids with 2D-Labeling (2007)
An algorithm for the labeling of image points, which are projected from 3D coplanar grid points with arbitrary orientation on the image, is proposed in this paper. Such grid points can be abstracted...
simultaneous detection of discontinuities (2007)
intensity-based cooperative bidirectional stereo matching with
METHODS FOR THE ANALYSIS OF FLOW STRUCTURES IN CIRCULATING FLUIDIZED BEDS (2007)
A. Bredebusch, H. Burkhardt, U. Lackermeier, J. Werther
This paper describes experiments to investigate the flow structure at the wall region of a Circulating Fluidized Bed (CFB). A high-speed video camera is used to visualize the flow structure through a...
On Shooting Image Sequences for 3D Reconstruction: Strategies and Evaluation (2007)
In this paper a reconstruction of 3D points from image sequences taken with four typical strategies (lateral, back-/forward movement, pan, and circumnavigation) of camera movement is implemented and...
M. Eschrig, J. A. Sauls, H. Burkhardt, D. Rainer
The theory of Fermi liquid superconductivity combines two important theories for correlated electrons in metals, Landau's theory of Fermi liquids and the BCS theory of superconductivity. In a...
Measurements of the SPS single bunch coherent tune shifts and head-tail growth rates (2007)
G. Arduini, H. Burkhardt, F. Zimmermann
Considerable efforts are underway to reduce the SPS impedance in view of its future use as LHC injector. These are followed experimentally by a series of beam measurements, started in 1999 [1] and...
Noise Properties of YBa2Cu3O7 Josephson Junction Array (2007)
S. Krey, O. Brügmann, H. Burkhardt, M. Schilling
��×ØÖ � Ø—We have fabricated magnetometers based on the magnetic field dependence of the critical current of 24 Æ bicrystal Josephson junctions from the high temperature superconductor...
Burkhardt, H, Macina, D, Talanov, V, Tsesmelis, E
The results from the numerical DPMJET-FLUKA simulation of the background in the experimental insertion regions of the LHC are presented. DPMJET3 is used for the generation and analysis of the...
Beam Scraping for LHC Injection (2007)
Burkhardt, H, Arduini, Gianluigi, Fischer, C, Gras, J-J, Koschik, A, Kramer, Daniel, ...
Operation of the LHC will require injection of very high intensity beams from the SPS to the LHC. Fast scrapers have been installed and will be used in the SPS to detect and remove any existing halo...
Absolute Luminosity from Machine Parameters (2007)
The expected rates for proton proton collisions in the LHC are rather high. Monitoring can be based on several detector components and different physics channels can be used together and should allow...
Halo Estimates and Simulations for Linear Colliders (2007)
Agapov, I, Blair, G, Burkhardt, H, Jackson, F, Latina, A, Neukermans, L, ...
Halo simulations and estimates are important for the design of future linear accelerators. We describe the main processes with analytic estimates and present our generic simulations in application to...
Fast Vertical Single-bunch Instability at Injection in the CERN SPS: An Update (2007)
Arduini, Gianluigi, Bohl, T, Burkhardt, H, Métral, E, Rumolo, G, Salvant, B
Following the first observation of a fast vertical instability for a single high-brightness bunch at injection in the SPS in 2002, a series of detailed measurements and simulations has been performed...
Monte Carlo generation of the energy spectrum of synchrotron radiation (2007)
A very fast and precise algorithm suitable for the Monte Carlo generation of the standard synchrotron radiation spectrum is described. The algorithm is based on direct inversion of the cumulative...
Halo estimates and simulations for linear colliders (2007)
Burkhardt, H, Neukermans, L, Latina, A, Schulte, D, Agapov, I, Blair, GA, ...
Halo simulations and estimates are important for the design of future linear accelerators. We describe the main processes with analytic estimates and present our generic simulations in application to...
Hölz, S., Polag, D., Becken, M., Fiedler-Volmer, R., Zhang, H. C., Hartmann, K., ...
In three field campaigns between the years 2000 and 2004 geophysical measurements were conducted in the Ejina Basin, NW China. Research work in the year 2004, which is described in this paper, was...
Optics Flexibility and Dispersion Matching at Injection into the LHC (2006)
Koschik, A, Burkhardt, H, Goddard, B, Kadi, Y, Kain, V, Mertens, V, ...
The LHC requires very precise matching of transfer line and LHC optics to minimise emittance blow-up and tail repopulation at injection. The recent addition of a comprehensive transfer line...
Lamont, Mike, Bailey, R, Burkhardt, H, Goddard, B, Jensen, L, Rhodri-Jones, Owain, ...
The proposal to inject beam into a sector of the partially completed LHC is presented. The test will provide an important milestone, force preparation of a number of key systems, and allow a number...
Tune shift induced by nonlinear resistive wall wake field of flat collimator (2006)
Zimmermann, Frank, Arduini, Gianluigi, Assmann, R W, Burkhardt, H, Caspers, F, Gasior, M, ...
We present formulae for the coherent and incoherent tune shifts due to the nonlinear resistive wall wake field for a single beam traveling between two parallel plates. In particular, we demonstrate...
Burkhardt, H, Koschik, A, Risselada, Thys, Schmidt, F
The betatron coupling introduced by the experimental solenoids in the LHC is small at injection and negligible at collision energy. We present a study of these effects and look at possible...
Halo and Tail Generation Studies for Linear Colliders (2006)
Burkhardt, H, Neukermans, L, Resta-López, J
Halo particles in linear colliders can result in significant losses and serious background which may reduce the overall performances. We present a study of various halo generation processes with...
Online monitoring of airborne allergenic particles (OMNIBUSS) (2006)
Scharring, S., Brandenburg, A., Breitfuss, G., Burkhardt, H., Dunkhorst, W., Ehr, M. Von, ...
Due to the increasing amount of 3D data for various applications there is a growing need for classification and search in such databases. As the representation of 3D objects is not canonical and...
Precision Electroweak Measurements on the Z Resonance (2005)
Schael, S, Barate, R, Brunelière, R, Buskulic, Damir, De Bonis, I, Décamp, D, ...
We report on the final electroweak measurements performed with data taken at the Z resonance by the experiments operating at the electron-positron colliders SLC and LEP. The data consist of 17...
Low energy hadronic contribution to the QED vacuum polarization (2005)
Recent improvements in the low energy e+e- annihilation data and their influence on the determination of the hadronic contribution to the running of the QED fine structure constant at m_Z are...
Transverse Mode-Coupling Instability in the CERN Super Proton Synchrotron (2005)
Arduini, Gianluigi, Benedetto, Elena, Burkhardt, H, Métral, E, Rumolo, Giovanni, Shaposhnikova, Elena
A vertical single-bunch instability has been observed in 2003 right after injection at 26 GeV/c in the CERN Super Proton Synchrotron (SPS). High-intensity proton bunches (~1.2 1011 p/b) with low...
Single Bunch Transverse Intensity Limitations in the SPS (2005)
Single bunch intensities of 1.15 × 1011 protons will be required for the nominal, and 1.7 × 1011 protons for ultimate beams in the LHC. These intensities are at the limit of transverse beam...
Loss Control and Collimation for the LHC (2005)
The total energy stored in the LHC is expected to reach 360 Mega Joule, which is about two orders of magnitude higher than in HERA or the Tevatron. Damage and quench protection in the LHC require a...
Overview and new developments in Geant4 electromagnetic physics (2005)
Ivantchenko, V., Maire, M., Urbàn, L., Grichine, V., Kokoulin, R., Burkhardt, H., ...
We summarize the recent developments and the current status of the Geant4 standard package of electromagnetic physics (G4StEm). The package provides simulation of electromagnetic (EM) interactions of...
Verfahren und Vorrichtung zur Detektion und zum Identifizieren von Biopartikeln (2005)
Popp, J., Roesch, P., Petry, R., Hofer, S., Schuele, A., Schmauz, G., ...
DE1004008762 A UPAB: 20051006 NOVELTY - Identifying bioparticles (I) comprises: locating an individual particle on a substrate (2) through irradiating at least an area of the substrate by means of...
Overview and new developments in Geant4 electromagnetic physics (2005)
Ivantchenko, V., Maire, M., Urbàn, L., Grichine, V., Kokoulin, R., Burkhardt, H., ...
We summarize the recent developments and the current status of the Geant4 standard package of electromagnetic physics (G4StEm). The package provides simulation of electromagnetic (EM) interactions of...
Overview and new developments in Geant4 electromagnetic physics (2005)
Ivantchenko, V., Maire, M., Urbàn, L., Grichine, V., Kokoulin, R., Burkhardt, H., ...
We summarize the recent developments and the current status of the Geant4 standard package of electromagnetic physics (G4StEm). The package provides simulation of electromagnetic (EM) interactions of...
Email Alerting, U Hüffmeier, M Steffens, H Burkhardt, J Lascorz, F Schürmeier-horst, ...
service
The Photon Collider at Tesla (2004)
Badelek, B, Blochinger, C, Blumlein, J, Boos, E, Brinkmann, R, Burkhardt, H, ...
High energy photon colliders $(\gamma\gamma,\gamma e)$ are based on $e^- e^-$ linear colliders where high energy photons are produced using Comptonscattering of laser light on high energy electrons...
The LHC Lead Injector Chain (2004)
Beuret, A, Borburgh, J, Blas, A, Burkhardt, H, Carli, Christian, Chanel, M, ...
A sizeable part of the LHC physics programme foresees lead-lead collisions with a design luminosity of 1027 cm-2 s-1. This will be achieved after an upgrade of the ion injector chain comprising...
Collimation in the Transfer Lines to the LHC (2004)
Burkhardt, H, Goddard, B, Kadi, Y, Kain, V, Weterings, W
The intensities foreseen for injection into the LHC are over an order of magnitude above the expected damage levels. The TI 2 and TI 8 transfer lines between the SPS and LHC are each about 2.5 km...
Observation of a Fast Single-Bunch Transverse Instability on Protons in the SPS (2004)
Arduini, Gianluigi, Benedetto, Elena, Burkhardt, H, Métral, Elias, Rumolo, Giovanni
The longitudinal impedance of the SPS has been reduced significantly by hardware modifications over the last years and the threshold for longitudinal instabilities increased accordingly. We now...
Investigation of Space Charge Effects and Intrabeam Scattering for Lead Ions in the SPS (2004)
Burkhardt, H, Manglunki, Django, Martini, M, Roncarolo, F, Rumolo, Giovanni
Space charge effects and intrabeam scattering usually play a minor role in high energy machines like the SPS. They can potentially become a limitation for the heavy ion beams needed for the LHC at...
Intensity and Luminosity after Beam Scraping (2004)
For injection into the LHC, it is planned to scrape off transverse tails at a level of about 3.5 sigma. We describe calculations and simulations of the intensity and luminosity reduction induced by...
The Photon Collider at Tesla (2004)
Badelek, B, Blochinger, C, Blumlein, J, Boos, E, Brinkmann, R, Burkhardt, H, ...
High energy photon colliders $(\gamma\gamma,\gamma e)$ are based on $e^- e^-$ linear colliders where high energy photons are produced using Comptonscattering of laser light on high energy electrons...
Beam Loss Scenarios and Strategies for Machine Protection at the LHC (2003)
Schmidt, R, Assmann, R W, Burkhardt, H, Carlier, E, Dehning, Bernd, Goddard, B, ...
At the Large Hadron Collider (LHC) with nominal parameters at 7 TeV, each proton beam has an energy of more than 330 MJ threatening to damage accelerator equipment in case of uncontrolled beam loss....
Assmann, R W, Blair, G A, Burkhardt, H, Fartoukh, Stéphane David, Faus-Golfe, A, Jeanneret, J B, ...
The collimation system of the Compact Linear Collider (CLIC) must fulfil a number of conflicting requirements, namely it should (1) remove beam halo to reduce the detector background, (2) provide a...
Comparative assessment of simulation tools for beam delivery systems of linear colliders (2003)
Redaelli, S, Assmann, R W, Burkhardt, H, Schulte, Daniel, Zimmermann, Frank, Walker, N, ...
In this paper, simulation codes for Beam Delivery Systems in linear colliders are discussed. Several tracking codes are available for particle tracking. They do not normally include precise...
Protection Devices in the Transfer Lines to the LHC (2003)
Burkhardt, H, Goddard, G, Mertens, V
Beams will be transferred from SPS to LHC through two transfer lines, each of over 2.5 km length, equipped with conventional resistive magnets with relatively small apertures. Beam energy densities...
Investigation of Space Charge effects in the SPS (2003)
Burkhardt, H, Rumolo, Giovanni, Zimmermann, Frank
Space charge effects generally play a rather minor role in high energy machines like the SPS. Rather high space charge tune shifts may however become unavoidable in the SPS for the heavy ion beams...
Burkhardt, H, Koschik, A, Rumolo, Giovanni, Zimmermann, Frank, Zotter, Bruno W
Coherent tune shifts with current have been measured in the SPS with single bunches and two bunches at varying distances between them. The measurements showed the usual negative slope with intensity...
The wavelength of neutrino and neutral kaon oscillations (2003)
Burkhardt, H., Lowe, J., Stephenson Jr, G. J., Goldman, T.
Neutral kaons, and probably also neutrinos, exhibit oscillations between flavor eigenstates, as a result of being produced in a superposition of mass eigenstates. Several recent papers have addressed...
Production of muon pairs in annihilation of high-energy positrons with resting electrons (2003)
Burkhardt, H, Kelner, S R, Kokoulin, R P
A Monte Carlo generator for the electromagnetic production of muon pairs by annihilation of high-energy positrons with atomic electrons is described. The computer code is designed as a standard...
Assmann, R W, Braun, H, Burkhardt, H, Corsini, R, Faus-Golfe, A, Gronberg, J, ...
Preliminary investigations are summarized on the possible use of the CTF3 facility for extended beam-dynamics studies and advanced accelerator R&D, which would exploit its unique properties and beam...
CLIC Beam Delivery System (2003)
Aleksa, Martin, Assmann, R W, Burkhardt, H, Jeanneret, J B, Redaelli, S, Risselada, Thys, ...
We review the present design for the CLIC beam delivery system as configured for 3 TeV and for 500 GeV, describe some recent developments (including the combined effect of solenoid, crab cavity, and...
Geant4 - A simulation toolkit (2003)
Agostinelli, S., Allison, J., Amako, K., Apostolakis, J., Araujo, H., Arce, P., ...
Geant4 - A simulation toolkit (2003)
Agostinelli, S., Allison, J., Amako, K., Apostolakis, J., Araujo, H., Arce, P., ...
Geant4 - A simulation toolkit (2003)
Agostinelli, S., Allison, J., Amako, K., Apostolakis, J., Araujo, H., Arce, P., ...
Requirements for the LHC collimation system (2002)
Assmann, R W, Baishev, I S, Brugger, M, Bruno, L, Burkhardt, H, Burtin, G, ...
The LHC requires efficient collimation during all phases of the beam cycle. Collimation plays important roles in prevention of magnet quenches from regular beam diffusion, detection of abnormal beam...
Comparison of different tracking codes for beam delivery systems of linear colliders (2002)
Redaelli, S, Assmann, R W, Blair, G A, Burkhardt, H, Nosochkov, Yu M, Raubenheimer, T O, ...
The vertical RMS spot sizes at the interaction point of linear colliders are in the 1 nm to 5 nm range at beam en-ergies from 0.25 TeV to 1.5 TeV. Numerical tracking of particles through the magnetic...
Design Status of the CLIC Beam Delivery System (2002)
Aleksa, Martin, Assmann, R W, Blair, G A, Burkhardt, H, Faus-Golfe, A, Redaelli, S, ...
Recent developments on the CLIC collimation and final focus are described. The combination of a shortened linear, or alternative nonlinear, collimation section and a compact final focus substantially...
Background simulation for the CLIC Beam Delivery System with Geant (2002)
Blair, G A, Burkhardt, H, Schreiber, H J
Background simulation with particle interactions in the materials of an accelerator environment and their follow up towards the detector are described. The studies include muon production and follow...
CLIC 3-TeV photon collider option (2002)
Options for a 3-TeV photon collider for CLIC are considered. Possible laser parameters and estimates of the luminosity are discussed.
Monte Carlo Generator for Muon Pair Production (2002)
Burkhardt, H, Kelner, S R, Kokoulin, R P
A Monte Carlo Generator for the electromagnetic pair production of muon pairs by high-energy photons in matter is described. The computer code is designed as a standard electromagnetic process for...
Adloff, C., Andreev, V., Andrieu, B., Anthonis, T., Arkadov, V., Astvatsatourov, A., ...
Jet production is studied in the Breit frame in deep-inelastic positron-proton scattering over a large range of four-momentum transfers 5 Q^2 15000 GeV^2 and transverse jet energies 7 E_T 60 GeV. The...
The energy calibration of LEP in 1992 (2002)
Arnaudon, L, Assmann, R W, Billan, J, Birr, W, Blondel, A, Bobbink, Gerjan J, ...
Higgs Physics with a gamma-gamma Collider Based on CLIC 1 (2001)
Asner, D M, Burkhardt, H, De Roeck, A, Ellis, Jonathan Richard, Gronberg, J B, Heinemeyer, S, ...
We present the machine parameters and physics capabilities of the CLIC Higgs Experiment (CLICHE), a low-energy gamma-gamma collider based on CLIC 1, the demonstrator project for the higher-energy...
TESLA Technical Design Report, Part VI, Chapter 1: The Photon Collider at TESLA (2001)
Badelek, B., Blochinger, C., Blumlein, J., Boos, E., Brinkmann, R., Burkhardt, H., ...
TESLA Technical Design Report, Part VI, Chapter 1: The Photon Collider at TESLA
TESLA Technical Design Report, Part VI, Chapter 1: The Photon Collider at TESLA (2001)
Badelek, B, Blochinger, C, Blumlein, J, Boos, E, Brinkmann, R, Burkhardt, H, ...
TESLA Technical Design Report, Part VI, Chapter 1: The Photon Collider at TESLA
Searches at HERA for Squarks in R-Parity Violating Supersymmetry (2001)
Adloff, C., Andreev, V., Andrieu, B., Anthonis, T., Arkadov, V., Astvatsatourov, A., ...
A search for squarks in R-parity violating supersymmetry is performed in e^+p collisions at HERA at a centre of mass energy of 300 GeV, using H1 data corresponding to an integrated luminosity of 37...
Overview of the CLIC Collimation design (2001)
Assmann, R W, Burkhardt, H, Fartoukh, Stéphane David, Jeanneret, J B, Pancin, J, Redaelli, S, ...
The collimation system of the Compact Linear Collider (CLIC) should simultaneously fulfill three different functions. It must (1) provide adequate halo collimation to render the detector background...
Measurements of the SPS transverse impedance in 2000 (2001)
Arduini, Gianluigi, Burkhardt, H, Cornelis, Karel, Klem, J T, Zimmermann, Frank, Zorzano-Mier, M P
We report on measurements of coherent tune shifts, head-tail growth rates, and current-dependent betatron phase advances at the CERN SPS in the year 2000. Comparing results obtained at two different...
Investigation of vacuum polarization in t-channel radiative Bhabha scattering (2001)
We discuss the possibility of a precision measurement of vacuum polarization in t-channel radiative Bhabha scattering at a high luminosity collider. For illustration, the achievable precision is...
Investigation of vacuum polarization in t-channel radiative Bhabha scattering (2001)
We discuss the possibility of a precision measurement of vacuum polarization in t-channel radiative Bhabha scattering at a high luminosity collider. For illustration, the achievable precision is...
Final-Focus Schemes for CLIC at 3 TeV (2001)
Zimmermann, Frank, Burkhardt, H, Risselada, Thys, Schmidt, F, Schreiber, H J
We discuss benefits and drawbacks of two different final-focus schemes for CLIC at 3 TeV centre-of-mass (c.m.) energy, by examining tolerances, tunability and potential background for a 3.3-km long...
TESLA Technical Design Report, Part VI, Chapter 1: The Photon Collider at TESLA (2001)
Badelek, B, Blochinger, C, Blumlein, J, Boos, E, Brinkmann, R, Burkhardt, H, ...
TESLA Technical Design Report, Part VI, Chapter 1: The Photon Collider at TESLA
Three-Jet Production in Deep-Inelastic Scattering at HERA (2001)
Adloff, C., Andreev, V., Andrieu, B., Anthonis, T., Arkadov, V., Astvatsatourov, A., ...
Three-jet production is studied for the first time in deep-inelastic positron-proton scattering. The measurement carried out with the H1 detector at HERA covers a large range of four-momentum...
Diffractive jet production in deep-inelastic e+ p collisions at HERA (2001)
Adloff, C., Andreev, V., Andrieu, B., Anthonis, T., Arkadov, V., Astvatsatourov, A., ...
A measurement is presented of dijet and 3-jet cross sections in low-|t| diffractive deep-inelastic scattering interactions of the type ep -> eXY, where the system X is separated by a large rapidity...
Dijet Production in Charged and Neutral Current $e^{+}p$ Interactions at High $Q^{2}$ (2001)
Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., ...
Jet production in charged and neutral current events in the kinematic range of Q^2 from 640 to 35000 GeV^2 is studied in deep-inelastic positron-proton scattering at HERA. The measured rate of...
Photoproduction with a leading proton at HERA (2001)
Adloff, C., Andreev, V., Andrieu, B., Anthonis, T., Arkadov, V., Astvatsatourov, A., ...
The total cross section for the photoproduction process with a leading proton in the final state has been measured at yp centre-of-mass energies W of 91, 181 and 231 GeV. The measured cross sections...
Three-Jet Production in Deep-Inelastic Scattering at HERA (2001)
Adloff, C., Andreev, V., Andrieu, B., Anthonis, T., Arkadov, V., Astvatsatourov, A., ...
Three-jet production is studied for the first time in deep-inelastic positron-proton scattering. The measurement carried out with the H1 detector at HERA covers a large range of four-momentum...
Diffractive jet production in deep-inelastic e+ p collisions at HERA (2001)
Adloff, C., Andreev, V., Andrieu, B., Anthonis, T., Arkadov, V., Astvatsatourov, A., ...
A measurement is presented of dijet and 3-jet cross sections in low-|t| diffractive deep-inelastic scattering interactions of the type ep -> eXY, where the system X is separated by a large rapidity...
Dijet Production in Charged and Neutral Current $e^{+}p$ Interactions at High $Q^{2}$ (2001)
Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., ...
Jet production in charged and neutral current events in the kinematic range of Q^2 from 640 to 35000 GeV^2 is studied in deep-inelastic positron-proton scattering at HERA. The measured rate of...
Three-Jet Production in Deep-Inelastic Scattering at HERA (2001)
Adloff, C., Andreev, V., Andrieu, B., Anthonis, T., Arkadov, V., Astvatsatourov, A., ...
Three-jet production is studied for the first time in deep-inelastic positron-proton scattering. The measurement carried out with the H1 detector at HERA covers a large range of four-momentum...
Diffractive jet production in deep-inelastic e+ p collisions at HERA (2001)
Adloff, C., Andreev, V., Andrieu, B., Anthonis, T., Arkadov, V., Astvatsatourov, A., ...
A measurement is presented of dijet and 3-jet cross sections in low-|t| diffractive deep-inelastic scattering interactions of the type ep -> eXY, where the system X is separated by a large rapidity...
Dijet Production in Charged and Neutral Current $e^{+}p$ Interactions at High $Q^{2}$ (2001)
Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., ...
Jet production in charged and neutral current events in the kinematic range of Q^2 from 640 to 35000 GeV^2 is studied in deep-inelastic positron-proton scattering at HERA. The measured rate of...
Measurements Of Sps, H. Burkhardt, G. Rumolo, F. Zimmermann
this document. These sessions included setup and some other single bunch studies. For an overview see Table 1. In spite of our strong request to have at least some of these measurements at higher...
Multi-TeV CLIC Photon Collider Option (2000)
Considerations for an option of gamma gamma collisions at multi-TeV energies are described, with focus on the 3 TeV CLIC machine, currently under study at CERN.
CLIC: a Two-Beam Multi-TeV $e\pm$ Linear Collider (2000)
Delahaye, J P, Wilson, Ian H, Assmann, R W, Becker, F, Bossart, Rudolf, Braun, H, ...
The CLIC study of a high-energy (0.5 - 5 TeV), high-luminosity (1034 - 1035 cm-2 sec-1) e± linear collider is presented. Beam acceleration using high frequency (30 GHz) normal-conducting structures...
Design Status of the CLIC 3-TeV Beam Delivery System and Damping Rings (2000)
Assmann, R W, Burkhardt, H, Fartoukh, Stéphane David, Jeanneret, J B, Jowett, John M, Ruggiero, F, ...
We describe the present design status of beam delivery and damping rings for CLIC at 3 TeV cm energy, and outline our future plans. The beam delivery system comprises collimation, final focus and...
Accelerator Physics at LEP (2000)
Brandt, D, Burkhardt, H, Lamont, M, Myers, S, Wenninger, J
Accelerator physics issues and their influence on performance are presented for the Large Electron Positron storage ring (LEP) at CERN in Geneva, Switzerland. After several years of operation on the...
Measurements of coherent tune shifts and head-tail growth rates at the CERN SPS (2000)
Zorzano-Mier, M P, Arduini, Gianluigi, Burkhardt, H, Cornelis, Karel, Zimmermann, Frank, Papaphilippou, Y
As part of an ongoing effort to monitor SPS impedance changes with regard to LHC, the coherent tune shifts and head-tail growth rates in the SPS were measured for single proton bunches at 26 GeV....
Measurements Of Phase Advance Between Arcs (2000)
Brandt, D, Burkhardt, H, Hofmann, A, Koutchouk, Jean-Pierre, Von Holtey, G
Inclusive Photoproduction of Neutral Pions in the Photon Hemisphere at HERA (2000)
Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., ...
A Search for Excited Fermions at HERA (2000)
Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., ...
Elastic Photoproduction of $J/\psi$ and $\Upsilon$ Mesons at HERA (2000)
Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., ...
Measurement of the Z Resonance Parameters at LEP (2000)
Barate, R., Decamp, D., Ghez, P., Goy, C., Lees, J P., Lucotte, A., ...
The properties of the Z resonance are measured from the analysis of 4.5 million Z decays into fermion pairs collected with the \Aleph\ detector at L EP. The data are consistent with lepton...
Measurement of the Z Resonance Parameters at LEP (2000)
Barate, R., Decamp, D., Ghez, P., Goy, C., Lees, J P., Lucotte, A., ...
The properties of the Z resonance are measured from the analysis of 4.5 million Z decays into fermion pairs collected with the \Aleph\ detector at L EP. The data are consistent with lepton...
Inclusive Photoproduction of Neutral Pions in the Photon Hemisphere at HERA (2000)
Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., ...
A Search for Excited Fermions at HERA (2000)
Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., ...
Elastic Photoproduction of $J/\psi$ and $\Upsilon$ Mesons at HERA (2000)
Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., ...
Measurement of the Z Resonance Parameters at LEP (2000)
Barate, R., Decamp, D., Ghez, P., Goy, C., Lees, J P., Lucotte, A., ...
The properties of the Z resonance are measured from the analysis of 4.5 million Z decays into fermion pairs collected with the \Aleph\ detector at L EP. The data are consistent with lepton...
Inclusive Photoproduction of Neutral Pions in the Photon Hemisphere at HERA (2000)
Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., ...
A Search for Excited Fermions at HERA (2000)
Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., ...
Elastic Photoproduction of $J/\psi$ and $\Upsilon$ Mesons at HERA (2000)
Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., ...
Measurements of coherent tune shift and head-tail growth rates at the SPS. (2000)
G. Arduini, H. Burkhardt, K. Cornelis, Y. Papaphilippou, F. Zimmermann, M.P. Zorzano
Introduction Several measurements and calculations similar to those described in this note have been performed in the past. Results are summarised in section 8. Most of them are quite old and...
Measurements of Coherent Tune Shifts and Head-Tail Growth Rates at the CERN SPS. (2000)
Arduini Burkhardt Cornelis, G. Arduini, G. Arduini, H. Burkhardt, H. Burkhardt, K. Cornelis, ...
As part of an ongoing effort to monitor SPS impedance changes with regard to the upgrading of this machine as injector into the LHC, the coherent tune shifts and headtail growth rates in the SPS were...
To be submitted to The European Physical Journal C (2000)
Adloff C, V. Andreev, B. Andrieu, Arkadov Astvatsatourov, I. Ayyaz, A. Babaev, ...
A search for excited fermions ¢ ¡ ¤¦¥ pb§ of the first generation in scattering at the collider HERA is presented using H1 data with an integrated luminosity of 37. All electroweak decays of...
A conceptual design for a recirculating electron accelerator with a maximum energy of 25 GeV and a continuous beam current of 0.1 mA on target has been prepared by a study group at CERN. The machine...
Transverse beam tails due to inelastic scattering (1999)
Burkhardt, H, Reichel, I, Roy, G
Non-Gaussian beam tails producing low beam lifetimes and background to the experimental detectors can be a serious performance limitation in colliding beam facilities. We describe simulations and...
Machine background common to all machines (1999)
General machine backgrounds relevant for linear colliders are described: Off momentum particles from beam-gas and Compton scattering on black body radiation, beam-tails, muons and synchrotron...
Beam Lifetime and Beam Tails in LEP (1999)
Measurements of beam lifetime and non-Gaussian beam tails in LEP will be summarized. The measured beam lifetimes are compared to the lifetime expected from scattering processes. Non-Gaussian beam...
Measurement of the Z Resonance Parameters at LEP (1999)
Barate, R, Décamp, D, Ghez, P, Goy, C, Lees, J P, Lucotte, A, ...
The properties of the Z resonance are measured from the analysis of 4.5 million Z decays into fermion pairs collected with the \Aleph\ detector at L EP. The data are consistent with lepton...
Overview of LEP operation in 1998 (1999)
Arduini, Gianluigi, Assmann, R W, Bailey, R, Burkhardt, H, Butterworth, A, Collier, Paul, ...
After the installation of 32 additional RF cavities in the 1997-1998 shutdown LEP was operated at a beam energy of 94.5 GeV. The total integrated luminosity for the year 1998 clearly surpassed its...
Energy Loss Measurements at LEP 2 (1999)
Burkhardt, H, Müller, A S, Wenninger, J
The accurate measurement of the W Boson mass at LEP requires to determine the beam energy to the highest possible precision. Present schemes rely on accurate energy determination in the range of 40...
LEP Performance at 91.5 GeV (1998)
Arduini, Gianluigi, Bailey, R, Burkhardt, H, Collier, Paul, Cornelis, Karel, Faugier, A, ...
The 1997 LEP collider run was the first year of the LEP2 program devoted to stable high luminosity running. The good performance of the LEP superconducting RF system allowed to run at beam energies...
Oscillations of recoil particles against mixed states (1998)
Burkhardt, H., Lowe, J., Stephenson Jr., G. J., Goldman, T.
Some consequences of the oscillations of neutral kaons and neutrinos are discussed, in particular, the possibility of oscillations of particles recoiling against kaons or neutrinos from the...
Invariant feature histograms for texture classification (1998)
Abstract. In this paper nonlinear invariant feature histograms are introduced. By integrating nonlinear functions over the group of Euclidean motion we extract features that are invariant with...
Local invariant feature histograms for image retrieval (1998)
Among other techniques especially methods working fully automatically are of interest for image retrieval from large data collections. Histograms proved successful in automatic image retrieval,...
A connected component approach to the watershed segmentation (1998)
Andreas Bieniek, Alina Moga, Prof Dr. -ing, H. Burkhardt
Abstract. The watershed transformation is a popular image segmentation algorithm for grey scale images. In this paper, we present a definition of the watershed segmentation, based on sets of...
Study of beam-induced particle backgrounds at the LEP detectors (1997)
Von Holtey, G, Ball, A H, Brambilla, Elena, Burkhardt, H, Estabrooks, P G, Harris, F J, ...
Synchrotron radiation photons and off-momentum electrons which contribute to backgrounds in the LEP experiments have been simulated. A multi-faceted background protection system has been designed and...
Energy dependence of beam-beam interactions at LEP (1997)
LEP has been operated for several years at beam energies around 45 GeV and more recently at beam energies of 65 and 86 GeV, thus covering about a factor of two in beam energies. Vertical beam-beam...
Energy loss of proton and lead beams in the CERN-SPS (1997)
Arnold, J, Bohl, T, Burkhardt, H, Cornali, R, Cornelis, Karel, Engelmann, G, ...
The energy loss of an unbunched beam circulating in the CERN-SPS has been obtained from the observed frequency change of a longitudinal Schottky signal. This experiment was carried out for protons at...
Observations and simulations of beam tails in LEP (1997)
Reichel, I, Burkhardt, H, Roy, G
Transverse beam tails have been measured in LEP using scraping collimators and loss monitors. Very significant non-Gaussian tails are present for colliding beams and high beam-beam tune shift. On a...
Local invariant feature histograms for texture classification (1997)
This paper presents a method for texture classification based on invariant gray scale features. These features remain constant if the images are transformed according to the action of a...
Lead ion beam emittance and transmission studies in the PS-SPS complex at CERN (1996)
Arduini, Gianluigi, Bailey, R, Bohl, T, Burkhardt, H, Cappi, R, Carter, C, ...
In the Lead Ion Facility at CERN [1] Pb53+ ion beams are accelerated up to a kinetic energy of 4.2 GeV/u in the CERN PS, extracted and stripped to Pb82+ in the transfer line from PS to SPS where they...
Particle Background at LEP with Head-On colliding Bunch Trains (1996)
Burkhardt, H, Von Holtey, G, Ball, A H
The vertical closed orbit bumps around the interaction points in LEP, which are needed to separate counter rotating bunches at their parasitic collision points, generate additional particle...
Burkhardt, H, Cornelis, C, Von Holtey, G, Reichel, I, Schmickler, Hermann
Beam tails have been measured in LEP using scraping collimators and loss monistors for separated and colliding beams. Significant non-Gaussian beam tails have been observed with colliding beams for...
LEP1 operation, 1989-1995 (1996)
Arduini, Gianluigi, Bailey, R, Bohl, T, Bordry, Frederick, Burkhardt, H, Cornelis, C, ...
In October 1995, the last run foreseen for dedicated Z production at CERN was performed in LEP, thereby bringing to a close the first phase of operation of the machine. A total luminosity of 200 pb-1...
The SPS as lead-ion accelerator (1996)
Altuna, X, Arduini, Gianluigi, Arimatea, C, Bailey, R, Blanchard, R R, Bohl, T, ...
In 1995 the CERN SPS was used during two months to accelerate fully stripped ions of the Pb208 isotope from the equivalent proton momentum of 13 GeV/c to 400 GeV/c. The radio frequency swing which is...
Arbuzov, A B, Bigi, M, Burkhardt, H, Cacciari, M, Caffo, M, Dallavalle, G M, ...
The results concerning the theoretical evaluation of the small-angle Bhabha Scattering cross section obtained during the Workshop on Physics at LEP2 (CERN, Geneva, Switzerland, 1995) by the Working...
Lowe, J., Bassalleck, B., Burkhardt, H., Rusek, A., Stephenson Jr., G. J., Goldman, T.
We examine a recently published calculation which predicts an oscillatory behaviour for the decay of Lambdas produced together with a neutral kaon, and proposes a new expression for the wavelength of...
Lead Ion Beam Emittance And Transmission Studies In The Ps-Sps Complex At Cern (1996)
Arduini Bailey Bohl, G. Arduini, R. Bailey, T. Bohl, H. Burkhardt, C. Carter, ...
In the Lead Ion Facility at CERN [1] Pb 53+ ion beams are accelerated up to a kinetic energy of 4.2 GeV/u in the CERN PS, extracted and stripped to Pb 82+ in the transfer line from PS to SPS where...
A New Multilevel Line-Based Stereo Vision Algorithm Based on Fuzzy Techniques (1996)
This paper presents a multilevel algorithm for straight line extraction and matching from stereo intensity images based on fuzzy strategies. The ultimate goal of our work is to find 3D landmarks...
Operational procedures to obtain high beam-beam tune shifts in LEP pretzel operation (1995)
Bailey, R, Collier, Paul, Bohl, T, Burkhardt, H, Cornelis, Karel, De Rijk, G, ...
During the running period 1994 the luminosity of LEP has been improved without colliding higher bunch currents. This paper describes the main procedures used by the operations group for luminosity...
The SPS as accelerator of Pb$^{82+}$ ions (1995)
Faugier, A, Altuna, X, Bailey, R, Blanchard, R R, Bohl, T, Brouzet, E, ...
In 1994 the CERN SPS was used for the first time to accelerate fully stripped ions of the Pb208 isotope from the equivalent proton momentum of 13 GeV/c to 400 GeV/c. In the CERN PS, which was used as...
High intensity proton beams in a multi-cycled SPS (1995)
Faugier, A, Altuna, X, Bailey, R, Blanchard, R R, Bohl, T, Burkhardt, H, ...
The SPS ran for 247 days during 1994; 64% of this was with high intensity proton beam for physics data taking in the Fixed Target mode of operation, 12% was for a lead run at the end of the year,...
The energy calibration of LEP in the 1993 scan (1995)
Assmann, R W, Beuret, A, Blondel, A, Billan, J, Billen, R, Bobbink, Gerjan J, ...
Application of a new iterative minimization method to vision-guided flame control (1995)
ABSTRACT: This paper presents a new iterative minimization method for camera-based flame control applying digital image analysis. The method is an extension to the GaussNewton iteration. The...
Application of a New Iterative Minimization Method to Vision-Guided Flame Control (1995)
: This paper presents a new iterative minimization method for camera-based flame control applying digital image analysis. The method is an extension to the GaussNewton iteration. The controller is...
P Kraft, Kraft Nolle, G Schreiber, S Marshall, H Burkhardt
In this paper a modification of a standard parallel genetic algorithm (SPGA) is introduced which can be run efficiently on different types of parallel computers. The purpose of the algorithm is to...
P. Kraft, M. Nölle, G. Schreiber, S. Marshall, H. Burkhardt
In this paper a modification of a standard parallel genetic algorithm (SPGA) is introduced which can be run efficiently on different types of parallel computers. The purpose of the algorithm is to...
Update of the hadronic contribution to the QED vacuum polarization (1995)
H. Burkhardt, B. Pietrzyk, Particules Lapp
We have updated the evaluation of the hadronic contribution to the running of the QED fine structure constant. It is obtained from a dispersion integral over a parametrization of the measured cross...
BBBREM: Monte Carlo simulation of radiative Bhabha scattering in the very forward direction (1994)
A fast and simple Monte Carlo program is presented that simulates single Bremsstrahlung in Bhabha scattering, e+e- --> e+e-gamma, without constraints on scattering angles. This allows the study of...
LEP operation in 1992 with a 90$^0$ optics (1993)
Bailey, R, Bohl, T, Bordry, Frederick, Burkhardt, H, Cornelis, Karel, Collier, Paul, ...
Schulze-Koops, Hendrik, Burkhardt, H., Heesemann, J., Kirsch, T., Swoboda, B., Bull, C., ...
The binding of bacteria or bacterial products to host proteins of tissue extracellular matrix may be a mechanism of tissue adherence. We investigated interactions of the plasmid-encoded outer...
Measurement of the mass of the Z boson and the energy calibration of LEP (1993)
Arnaudon, L, Assmann, R W, Billan, J, Birr, W, Blondel, A, Bobbink, Gerjan J, ...
Measurement of the mass of the Z boson and the energy calibration of LEP (1993)
Arnaudon, L., Assmann, R., Billan, J., Birr, W., Blondel, A., Bobbink, G., ...
Measurement of the mass of the Z boson and the energy calibration of LEP (1993)
Arnaudon, L., Assmann, R., Billan, J., Birr, W., Blondel, A., Bobbink, G., ...
Measurement of the mass of the Z boson and the energy calibration of LEP (1993)
Arnaudon, L., Assmann, R., Billan, J., Birr, W., Blondel, A., Bobbink, G., ...
Comparison of different DFB laser models within the European COST 240 collaboration (1993)
Morthier, Geert, Baets, Roel, TSANG, CF, CAROLL, JE, WENZEL, H, MECOZZI, A, ...
Calibration and performance of the CHARM-II detector (1992)
Geiregat, D, Vilain, P, Wilquet, G, Binder, U, Burkhardt, H, Flegel, Wilfried, ...
The energy calibration of LEP in 1991 (1992)
Arnaudon, L, Assmann, R W, Billan, J, Birr, W, Blondel, A, Bobbink, Gerjan J, ...
The pretzel separation scheme in LEP (1992)
Kalbreier, Willi, Bailey, R, Burkhardt, H, Deluen, J P, Garrel, N, Gröbner, Oswald, ...
Schulze-Koops, Hendrik, Burkhardt, H., Heesemann, J., Mark, K. Von Der, Emmerich, F.
The plasmid-encoded outer membrane protein YadA of enteropathogenic yersiniae is associated with pathogenicity. Recently, collagen binding of YadA-positive yersiniae was reported without detailed...
Three years operational experience with LEP (1992)
Bailey, R, Bohl, T, Bordry, Frederick, Burkhardt, H, Cornelis, Karel, Collier, Paul, ...
A study of longitudinal polarization at LEP (1992)
Bovet, Claude, Burkhardt, H, Couchot, F, Föth, H, Grote, H, Von Holtey, G, ...
Measurement of tau branching ratios (1991)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
A study of Bose-Einstein correlations in e+e- annihilation at 91 GeV (1991)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
Measurement of the charged particle multiplicity distribution in hadronic Z decays (1991)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
Searches for new particles in Z decays using the ALEPH detector (1991)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
Measurement of the absolute luminosity with the ALEPH detector (1991)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
An investigation into intermittency (1991)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
Search for the neutral Higgs bosons of the MSSM and other two-doublet models (1991)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
Production and decay of charmed mesons at the Z resonance (1991)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
Improved measurements of electroweak parameters from Z decays into fermion pairs (1991)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
Measurement of the polarization of $\tau$ leptons produced in Z decays (1991)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
First two years operational experience with LEP (1991)
Bailey, R, Bohl, T, Bordry, Frederick, Burkhardt, H, Cornelis, Karel, Collier, Paul, ...
Measurement of isolated photon production in hadronic Z decays (1991)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
Search for a new weakly interacting particle (1991)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
Measurement of charge asymmetry in hadronic Z decays (1991)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
Searches for the standard Higgs boson produced in the reaction e$^{+}$e$^{-}$ --> H$^{0}$Z (1991)
Décamp, D, Ajaltouni, Ziad J, Albanese, J P, Albrecht, H, Alemany, R, Altoon, B, ...
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
Measurement of the B-$\overline{B}$ mixing at the Z (1991)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
Measurement of the B hadron lifetime (1991)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
Search for excited neutrinos in Z decay (1990)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
Measurement of electroweak parameters from Z decays into fermion pairs (1990)
Décamp, D, Deschizeaux, B, Giy, C, Lees, J P, Minard, M N, Alemany, R, ...
Searches for the standard Higgs boson (1990)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Alemany, R, ...
Search for a very light Higgs boson in Z decays (1990)
Décamp, D, Deschizeaux, B, Goy, C, Minard, M N, Crespo, J M, Delfino, M C, ...
Observation of the decay K$_{L}$ --> $\pi^{0}\gamma\gamma$ (1990)
Barr, Giles David, Carosi, R, Coward, D H, Cundy, Donald C, Doble, Niels T, Gatignon, L, ...
A large-area transition radiation detector (1990)
Barr, Giles David, Carosi, R, Gatignon, L, Gibson, V, Hagelberg, R, ...
Search for neutralino production in Z decays (1990)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Crespo, J M, ...
Heavy flavour production in Z decays (1990)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Crespo, J M, ...
A search for pair-produced charged Higgs bosons in Z0 decays (1990)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Crespo, J M, ...
ALEPH: a detector for electron-positron annihilations at LEP (1990)
Décamp, D, Deschizeaux, B, Lees, J P, Minard, M N, Crespo, J M, Delfino, M C, ...
Search for decays of the Z0 into a photon and a pseudoscalar meson (1990)
Décamp, D, Deschizeaux, B, Goy, C, Lees, J P, Minard, M N, Crespo, J M, ...
Electroweak parameters from a high statistics neutrino nucleon scattering experiment (1990)
Blondel, A, Böckmann, P, Burkhardt, H, Dydak, Friedrich, Grant, A L, Hagelberg, R, ...
Are there "prompt" like-sign dimuons? (1990)
Burkhardt, H, Dydak, Friedrich, Hagelberg, R, Krasny, M W, May, J, ...
First evidence for direct CP violation (1990)
Burkhardt, H, Clarke, P, Coward, D H, Cundy, Donald C, Doble, Niels T, Gatignon, L, ...
The beam and detector for a high-precision measurement of CP violation in neutral-kaon decays (1990)
Burkhardt, H, Clarke, P, Cundy, Donald C, Doble, Niels T, Gatignon, L, Hagelberg, R, ...
Determination of the number of light neutrino species (1990)
Décamp, D, Deschizeaux, B, Lees, J P, Minard, M N, Crespo, J M, Delfino, M C, ...
Properties of hadronic events in e+e- annihilation at \Sqrt s = 91 GeV (1990)
Décamp, D, Deschizeaux, B, Lees, J P, Minard, M N, Crespo, J M, Delfino, M C, ...
Determination of the leptonic branching ratios of the Z (1990)
Décamp, D, Deschizeaux, B, Lees, J P, Minard, M N, Crespo, J M, Delfino, M C, ...
Search for supersymmetric particles using acoplanar charged-particle pairs from Z0 decays (1990)
Décamp, D, Deschizeaux, B, Lees, J P, Minard, M N, Crespo, J M, Delfino, M C, ...
Search for the neutral Higgs boson from Z0 decay (1990)
Décamp, D, Deschizeaux, B, Lees, J P, Minard, M N, Crespo, J M, Delfino, M C, ...
A search for new quarks and leptons from Z0 decay (1990)
Décamp, D, Deschizeaux, B, Lees, J P, Minard, M N, Crespo, J M, Delfino, M C, ...
Search for neutral Higgs bosons from supersymmetry in Z decays (1990)
Décamp, D, Deschizeaux, B, Lees, J P, Minard, M N, Crespo, J M, Delfino, M C, ...
Search for excited leptons in Z0 decay (1990)
Décamp, D, Deschizeaux, B, Lees, J P, Minard, M N, Crespo, J M, Delfino, M C, ...
Precision measurement of sin$^{2}$theta$_{W}$ from semileptonic neutrino scattering (1990)
Abramowicz, H, Belusevic, R, Blondel, A, Blümer, H, Böckmann, P, Brummel, H D, ...
Electroweak radiative corrections at LEP energies (1990)
Barroso, A, Beenakker, W, Berends, F A, Blum, Walter, Boudjema, F, Burgers, G, ...
Search for the decay K$_{L}$ --> $\pi^{0}$e$^{+}$e$^{-}$ (1990)
Barr, Giles David, Clarke, P, Coward, D H, Cundy, Donald C, Doble, Niels T, Gatignon, L, ...
ALEPH: A DETECTOR FOR ELECTRON - POSITRON ANNIHILATIONS AT LEP (1990)
ALEPH Collaboration, Decamp, D, Deschizeaux, B, Lees, JP, Minard, MN, Crespo, JM, ...
Burkhardt, H., Altmann, H., Lunderstaedt, R.
KFK-PDV 87 (September 76)
Evidence against the existence of the B0 meson (1960)
Gomez, R., Burkhardt, H., Daybell, M., Ruderman, H., Sands, M., Talman, R.
Recent theoretical work (1-3) on the electromagnetic structure of the nucleon has revived interest in the possibility of a bound state, of 3 pions with I = 0, J = 1. Such a particle might be of...
Lascorz, J, Burkhardt, H, Huffmeier, U, Bohm, B, Schurmeyer-Horst, F, Lohmann, J, ...
Methods: DNA was obtained from 375 patients with psoriatic arthritis, 281 patients with psoriasis vulgaris without joint involvement, and 376 controls. The three variants of the CARD15 gene (R702W,...
Eipel, C, Kidess, E, Abshagen, K, LeMinh, K, Menger, M D, Burkhardt, H, ...
Sandrock, M, Hansel, J, Schulze, J, Schmitz, D, Niess, A, Burkhardt, H, ...
Prospects for a Large Hadron Electron Collider (LHeC) at the LHC
Klein, M, Aksakal, H, Bordry, F, Braun, H-H, Brüning, OS, Burkhardt, H, ...
Operational Procedures to Obtain High Beam-beam Tune Shifts in LEP Pretzel Operation
Bailey Collier Bohl, R. Bailey, P. Collier, T. Bohl, H. Burkhardt, K. Cornelis, ...
During the running period 1994 the luminosity of LEP has been improved without colliding higher bunch currents. This paper describes the main procedures used by the operations group for luminosity...
Luminosity performance at high Energy
Burkh Ar Dt, A Gev Cm, A Gev Cm, H. Burkhardt
The performance achieved in terms of luminosity and beam-beam tune shift is reviewed and compared for the 90/60 and 108/90 optics, different energies and number of bunches used. The analysis includes...