Stabilizing effect of a double-harmonic RF system in the CERN PS (2009)
Bhat, C, Caspers, F, Damerau, H, Hancock, S, Mahner, E, Zimmermann, F
Motivated by the discussions on scenarios for LHC upgrades, beam studies on the stability of flat bunches in a double-harmonic RF system have been conducted in the CERN Proton Synchrotron (PS)....
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...
Interactions of Microwaves and Electron Clouds (2009)
The modification of microwave signals passing through an electron cloud can be used as a diagnostic tool for detecting its presence and as a measure for its effective density. This observation method...
Design Considerations for the CLIC pre-damping rings (2009)
Antoniou, F, Papaphilippou, Y, Zimmermann, F
The CLIC pre-damping rings (PDR) have to accommodate a large emittance beam, coming in particular from the positron target and reduce its size to low enough values for injection into the main damping...
The CLIC positron source based on compton schemes (2009)
Rinolfi, L, Antoniou, F, Braun, H, Papaphilippou, Y, Schulte, D, Vivoli, A, ...
The CLIC polarized positron source is based on a positron production scheme in which polarized photons are produced by a Compton process. In one option, Compton backscattering takes place in a...
ATF2 ultra-low IP betas proposal (2009)
Bambade, P, Renier, Y, Bai, S, Braun, H, Delahaye, JP, Marin, E, ...
The CLIC Final Focus System has considerably larger chromaticity than those of ILC and its scaled test machine ATF2. We propose to reduce the IP betas of ATF2 to reach a CLIC-like chromaticity. This...
Stabilizing Effect of a Double-Harmonic RF System in the CERN PS (2009)
Bhat, C M, Caspers, F, Damerau, H, Hancock, S, Mahner, E, Zimmermann, F
Motivated by the discussions on scenarios for LHC upgrades, beam studies on the stability of flat bunches in a double-harmonic RF system have been conducted in the CERN Proton Synchrotron (PS)....
CERN Upgrade Plans for the LHC and its Injectors (2009)
The primary goal of CERN and the Large Hadron Collider (LHC) community is to ensure that LHC is operated efficiently, that it achieves nominal performance in the shortest term, and that its...
First beta-beating measurement in the LHC (2009)
Aiba, M, Calaga, R, Fartoukh, S, Franchi, A, Giovannozzi, M, Kain, V, ...
In 2008 beam successfully circulated in the LHC. Thanks to an excellent functioning of the beam position monitor (BPM) system and the related software, injection oscillations were recorded for the...
Study with One Global Crab Cavity at IR4 for LHC (2009)
Sun, Y, Assmann, R, Barranco, J, Tomas, R, Weiler, T, Zimmermann, F, ...
Modern colliders bring into collision a large number of bunches per pulse or per turn to achieve a high luminosity. The long-range beam-beam effects arising from parasitic encounters at such...
Tune Shift due to Crossing Collision and Crab Collision (2009)
Sun, Y, Zimmermann, F, Tomás, R
The use of crab cavities in the LHC may not only raise the luminosity, but it could also complicate the beam dynamics, e.g. crab cavities might not only cancel synchrobetatron resonances excited by...
Generation of short Proton bunches in the CERN Accelerator Complex (2009)
Assmann, R, Giovannozzi, M, Papaphilippou, Y, Zimmermann, F, Caldwell, A, Xia, G
Short high-energy proton bunches have been proposed as efficient drivers for single-stage electron-beam plasma accelerators. We discuss some very preliminary ideas if and how the desired proton...
Linear & Nonl. optics checks diring LHC injection tests (2009)
Fartoukh, S, Giovannozzi, M, Kain, V, Lamont, M, Sun, Y, Tomás, R, ...
In early LHC commissioning, linear and “higher-order” polarity checks were performed for one octant per beam, by launching suitable free betatron oscillations and then inverting a magnet-circuit...
Stacking Simulations for Compton Positron sources of Future Linear Colliders (2009)
Zimmermann, F, Papaphilippou, Y, Rinolfi, L, Vivoli, A, Yakimenko, V, Kuriki, M, ...
The Compton positron source of a future linear collider must obtain the target bunch population by accumulating a large number of positron packets, arriving either in a number of bursts from a...
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...
Status of LHC Crab Cavity simulations and beam studies (2009)
Calaga, R, De-Maria, R, Assmann, R, Barranco, J, Caspers, F, Ciapala, Edmond, ...
The LHC crab cavity program is advancing rapidly towards a first prototype which is anticipated to be tested during the early stages of the LHC phase I upgrade and commissioning. The general project...
Koutchouk, Jean-Pierre, Zimmermann, F
An LHC high-luminosity upgrade has been studied by various European and international collaborations since about 2001. Ingredients of such an LHC upgrade include the optimization of the...
Crab Dispersion and its Impact on LHC Collimation (2009)
Sun, YP, Tomás, R, Zimmermann, F
Crab cavity is proposed to be used for an LHC upgrade. The crab cavities are rf cavities operated in a transverse dipole mode, which imparts on the beam particles a transverse kick that varies with...
Beam-Induced Multipactoring and Electron-Cloud Effects in Particle Accelerators (2009)
Caspers, F, Rumolo, G, Scandale, Walter, Zimmermann, F
In the beam pipe of high-energy proton or positron accelerators an “electron cloud” can be generated by a variety of processes, e.g. by residual-gas ionization, by photoemission from synchrotron...
Angal-Kalinin, D., Jackson, F., Jones, J., Appleby, R., Barlow, R., Scarfe, A., ...
This report is the deliverable of the EUROTeV Beam Delivery System Lattice Design (BDSLD) and gives an overview of the published results.
Angal-Kalinin, D., Jackson, F., Jones, J., Appleby, R., Barlow, R., Scarfe, A., ...
This report is the deliverable of the EUROTeV Beam Delivery System Lattice Design (BDSLD) and gives an overview of the published results.
Angal-Kalinin, D., Jackson, F., Jones, J., Appleby, R., Barlow, R., Scarfe, A., ...
This report is the deliverable of the EUROTeV Beam Delivery System Lattice Design (BDSLD) and gives an overview of the published results.
Risikobasiertes statistisches Testen (2009)
Zimmermann, F., Eschbach, R., Kloos, J., Bauer, T.
In dieser Arbeit stellen wir erste Ideen für eine Methode zur automatischen Ableitung risikoreicher Testfälle vor. Diese Testfälle werden aus Modellen abgeleitet, die speziell zum Testen erstellt...
Zimmermann, F., Eschbach, R., Kloos, J., Bauer, T.
In this paper, a method is presented that allows to automatically generate test cases for risk-based testing of safety-critical systems. This is done through the systematic construction or refinement...
Intense pulsed electron beams application of modified materials. (2009)
Weisenburger, A., An, W., Engelko, V., Heinzel, A., Jianu, A., Lang, F., ...
Acta Physica Polonica A, 115(2009) S.1053-55
Surface modification of alloys exposed to extreme environment. (2009)
Jianu, A., Müller, G., Weisenburger, A., An, W., Heinzel, A., Zimmermann, F., ...
Euromat 2009 : European Congress and Exhibition on Advanced Materials and Processes, Glasgow, GB, September 7-10, 2009
The Low-wage-sector, Wirtschaftswissenschaftlichen Fakultät, Erstgutachter Prof, F. Zimmermann, ...
doctor rerum politicarum
Emittance growth induced by electron cloud in proton storage rings (2008)
Benedetto, Elena, Zimmermann, F, Coppa, G
In proton and positron storage rings with many closely spaced bunches, a large number of electrons can accumulate in the beam pipe due to various mechanisms (photoemission, residual gas ionization,...
Crab Compensation for LHC Beams (2008)
Calaga, R, Sun, Y, Tomás, R, Zimmermann, F
An R&D program to establish a road map for the installation of crab cavities in the LHC is rapidly advancing. Both local and global crab schemes are under investigation to develop cavities that will...
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...
Linac-LHC EP Collider Options (2008)
Zimmermann, F, Aksahal, H, Bordry, Frederick, Braun, H H, Brüning, Oliver Simon, Çiftçi, A K, ...
We describe various parameter scenarios for a ring-linac ep collider based on LHC and an independent electron linac. Luminosities between $10^{31}$ and $10^{33} cm^{-2}s^{-1}$ can be achieved with a...
Measurement of Resonance driving terms in the ATF Damping Ring (2008)
Tomás, R, Kubo, K, Kuroda, S, Naito, T, Okugi, T, Urakawa, J, ...
The measurement of resonance driving terms in the Damping Ring of the Accelerator Test Facility in KEK could help finding possible machine imperfections and even to optimize single particle stability...
RF Wire Compensator of Long-Range Beam-Beam Effects (2008)
Dorda, U, Caspers, F, Kroyer, T, Zimmermann, F
The dynamic aperture of the proton beam circulating in the Large Hadron Collider (LHC) is expected to be limited by up to 120 long-range beam-beam encounters. In order to perfectly compensate the LHC...
Borgnolutti, F, Brüning, Oliver Simon, Dorda, U, Fartoukh, S, Giovannozzi, M, Herr, Werner, ...
In the framework of the studies for the upgrade of the insertions of the CERN Large Hadron Collider, four optical layouts were proposed with the aim of reducing the beta-function at the collision...
Longitudinal stability of Flat Bunches with Space-Charge or Inductive Impedance (2008)
Santiago Gonzalez, I, Zimmermann, F
We study the loss of Landau damping for the longitudinal plane via the “Sacherer formalism”. Stability limits are calculated for several longitudinal beam distributions, in particular for two...
Electron-Cloud Intrabunch Density Modulation (2008)
During the passage of a proton bunch through an electron cloud, a complicated electron density modulation arises, with characteristic ring or stripe patterns that move radially outward along the...
Wire excitation experiments in the CERN SPS (2008)
Dorda, U, Calaga, R, Fischer, W, Koutchouk, J P, Tomas, R, Wenninger, J, ...
In order to study the effect of long range interaction and its wire compensation experimentally, current carrying wires are installed in the CERN Super Proton Synchrotron (SPS). In this paper we...
Koutchouk, Jean-Pierre, Assmann, Ralph Wolfgang, Métral, E, Todesco, E, Zimmermann, F, De Maria, R, ...
A significant reduction of b* requires a new beam crossing scheme to overcome the consequence of the luminosity loss factor. We define in this paper the parameters of a possible solution taking...
M. Yoshida, M. Yoshioka, S. Yoshimoto, F. Zimmermann
We summarize the machine operation of KEKB during past one year. Progress for this period, causes of present performance limitations and future prospects are described.
RECENT PROGRESS AT KEKB (2008)
We summarize the machine operation of KEKB during past one year focusing on progress for this period.
EU contract number RII3-CT-2003-506395 CARE-Conf-2004-006-HHH (2008)
High Energy High, E. Benedetto, F. Ruggiero, D. Schulte, F. Zimmermann, M. Blaskiewicz, ...
INTRODUCTION At many accelerator laboratories computer codes have been developed in the attempt to predict electron-cloud effects at operating or future machines. The underlying assumptions and...
EU contract number RII3-CT-2003-506395 CARE-Conf-2004-033-HHH (2008)
High Energy High, F. Zimmermann, Hadron Beams
d related research efforts, with special emphasis on the LHC and its upgrade. INTRODUCTION The two primary performance characteristics of a circular collider are its centre-of-mass energy and its...
EU contract number RII3-CT-2003-506395 CARE-Conf-2004-034-HHH (2008)
High Energy High, J. P. Koutchouk, J. Wenninger, F. Zimmermann, J. P. Koutchouk, J. Wenninger, ...
nstalled at the CERN SPS in 2002. First successful machine experiments explored the dependence of beam loss, beam size, and beam lifetime on the beam-wire distance and on the wire excitation. They...
Experimental Studies of Compensation of Beam-Beam Effects with Tevatron Electron Lenses (2008)
Shiltsev, V., Alexahin, Yu., Bishofberger, K., Kamerdzhiev, V., Parkhomchuk, V., Reva, V., ...
Applying the space-charge forces of a low-energy electron beam can lead to a significant improvement of the beam-particle lifetime limit arising from the beam-beam interaction in a high-energy...
Enhanced General Packet Radio Service OPNET Model (2008)
R. Narayanan, P. Chan, M. Johansson, F. Zimmermann, Lj. Trajkovic
AbstractAbstract Abstract In this paper, we describe the enhancements made to an existing General Packet Radio Service (GPRS) network OPNET model. These enhancements to the existing model are the...
Semantics-enabled service discovery framework in the SIMDAT pharma grid (2008)
Qu, C., Zimmermann, F., Kumpf, K., Kamuzinzi, R., Ledent, V., Herzog, R.
We present the design and implementation of a semantics-enabled service discovery framework in the data Grids for process and product development using numerical simulation and knowledge discovery...
Study of abnormal vertical emittance growth in ATF extraction line (2008)
Alabau Pons, M., Faus-Golfe, A., Bambade, P., Brossard, J., Le Meur, G., Rimbault, C., ...
Since several years, the vertical beam emittance mea- red in the Extraction Line (EXT) of the Accelerator Test Facility (ATF) at KEK, that will transport the electron beam from the ATF Damping Ring...
Study of abnormal vertical emittance growth in ATF extraction line (2008)
Alabau Pons, M., Faus-Golfe, A., Bambade, P., Brossard, J., Le Meur, G., Rimbault, C., ...
Since several years, the vertical beam emittance mea- red in the Extraction Line (EXT) of the Accelerator Test Facility (ATF) at KEK, that will transport the electron beam from the ATF Damping Ring...
Study of abnormal vertical emittance growth in ATF extraction line (2008)
Alabau Pons, M., Faus-Golfe, A., Bambade, P., Brossard, J., Le Meur, G., Rimbault, C., ...
Since several years, the vertical beam emittance mea- red in the Extraction Line (EXT) of the Accelerator Test Facility (ATF) at KEK, that will transport the electron beam from the ATF Damping Ring...
Exploring ultra-low β* values in ATF2 - R&D Programme proposal (2008)
Angal-Kalinin, D., Bai, S., Bambade, P., Braun, H., Delahaye, J.P., Gao, J., ...
We propose to explore the beam sizes and performance of the ATF2 Final Focus System for reduced IP beta functions up to a factor between 2 and 4 below its design. The results will demonstrate the...
Exploring ultra-low β* values in ATF2 - R&D Programme proposal (2008)
Angal-Kalinin, D., Bai, S., Bambade, P., Braun, H., Delahaye, J.P., Gao, J., ...
We propose to explore the beam sizes and performance of the ATF2 Final Focus System for reduced IP beta functions up to a factor between 2 and 4 below its design. The results will demonstrate the...
Exploring ultra-low β* values in ATF2 - R&D Programme proposal (2008)
Angal-Kalinin, D., Bai, S., Bambade, P., Braun, H., Delahaye, J.P., Gao, J., ...
We propose to explore the beam sizes and performance of the ATF2 Final Focus System for reduced IP beta functions up to a factor between 2 and 4 below its design. The results will demonstrate the...
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, ...
Naumann, I., Hogben, G., Benito, R., Dean, R., Fritsch, L., Gould, J., ...
Pulsed electron beams and their use for material modification. (2008)
Weisenburger, A., Engelko, V., An, W., Heinzel, A., Jianu, A., Lang, F., ...
1st ITG Internat.Vacuum Electronics Workshop, Bad Honnef, November 10-11, 2008
Beam heat load measurements in the cold bore superconductive undulator in ANKA. (2008)
Casalbuoni, S., Grau, A., Hagelstein, M., Rossmanith, R., Zimmermann, F., Kostka, B., ...
14th Nat.Conf.on Synchrotron Radiation Instrumentation (SRI 2007), Baton Rouge, La., April 25-27, 2007
Beam heat load measurements in the cold bore superconductive undulator in ANKA. (2008)
Casalbuoni, S., Grau, A., Hagelstein, M., Rossmanith, R., Zimmermann, F., Kostka, B., ...
Nuclear Instruments and Methods in Physics Reseach A, 582(2007) S.34-36
N. Masuda, W. Sawyer, C. Stern, F. Zimmermann
Abstract: This paper presents three scientific applications which are implemented on the recently
ELECTRON-ELECTRON LUMINOSITY IN THE NEXT LINEAR COLLIDER---A PRELIMINARY STUDY (2007)
F. Zimmermann, K. A. Thompson, R. H. Helm
In this paper, we discuss some operational aspects of electron-electron collisions at the Next Linear Collider (NLC) and estimate the luminosity attainable in such a machine. We also consider the use...
We discuss simulated energy and angular spectra of electrons lost to the vacuum chamber wall during beam-induced multipacting in SPS and LHC. Our simulations demonstrate that electron energies and...
F. Zimmermann, H. Fukuma, K. Ohmi
We report recent electron-cloud studies for the Low Energy Ring (LER) of KEKB, continuing earlier investigations [1, 2]. Here we simulate the build up and decay time of the cloud for various solenoid...
EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH Electron Cloud at the CERN Muon Storage (2007)
Computer simulations for the CERN muon storage ring confirm the absence of beam-induced multipacting. Thus electron-cloud build up along the bunch train is not expected to be a problem.
Trapped Macroparticles In Electron Storage Rings (2007)
F. Zimmermann, J. T. Seeman, M. Zolotorev, W. Stoeffl
Sudden drops of the beam lifetime ascribed to the capture of positively charged macroparticles (`dust') are observed at many high-energy electron storage rings. A trapped macroparticle has a...
A Bunch Compressor For The Next Linear Collider (2007)
Emma Raubenheimer Zimmermann, P. Emma, T. Raubenheimer, F. Zimmermann
A bunch compressor design for the Next Linear Collider (NLC) is described. The compressor reduces the bunch length by a factor of 40 in two stages. The first stage at 2 GeV consists of an rf section...
Collective Effects In The Nlc Damping Ring Designs (2007)
Raubenheimer Bane Berg, T. Raubenheimer, J. S. Berg, J. Byrd, J. Corlett, ...
this paper, we give an overview of collective effects and related issues in the damping rings for the NLC[1]. The main damping ring will have a maximum average current of 1 A in four bunch trains...
Thermal-Photon and Residual-Gas Scattering in the NLC Beam Delivery (2007)
Reichel Zimmermann Tenenbaum, I. Reichel, F. Zimmermann, P. Tenenbaum, T. O. Raubenheimer
Without collisions, the largest contribution to the beam lifetime in LEP is Compton scattering off thermal photons. Even if only a few particles are scattered in a single pass, the potential...
Performance Of The 1994/95 Slc Final Focus System (2007)
Zimmermann Barklow Ecklund, F. Zimmermann, T. Barklow, S. Ecklund, P. Emma, D. Mccormick, ...
Amajor upgrade to the SLC final focus was installed in 1994 to eliminate the dominant third-order aberration of the system, and thereby to reduce the vertical beam size at the IP by a factor of two....
FINAL-FOCUS SYSTEM AND COLLISION SCHEMES FOR A 5-TeV W-BAND LINEAR COLLIDER (2007)
Zimmermann And, F. Zimmermann, D. H. Whittum
this report, we describe a final-focus system for such an accelerator, whose length is restrained by eliminating chromatic correction. The interaction point (IP) spot size is limited by synchrotron...
EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH Electron Cloud at the CERN Muon Storage (2007)
Computer simulations for the CERN muon storage ring confirm the absence of beam-induced multipacting. Thus electron-cloud build up along the bunch train is not expected to be a problem.
High-Intensity Single Bunch Instability Behavior In The New SLC Damping Ring Vacuum Chamber* (2007)
K. Bane, J. Bowers, A. Chao, T. Chen, F. J. Decker, P. Krejcik, ...
New low-impedance vacuum chambers were installed in the SLC damping rings for the 1994 run after finding a single bunch instability with the old chamber. Although the threshold is lower with the new...
Electron-Cloud Studies for the Low Energy (2007)
We present simulations of electron-cloud build up in the KEKB LER, and discuss various mechanisms by which the electron cloud can dilute the vertical emitrance. Electron-driven single-bunch beam...
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...
European Organization For Nuclear Research (2007)
We evaluate the multi-bunch beam loading in the recirculating linacs (RLAs) of the CERN neutrino factory, and show that the resulting energy variation along the bunch train can be reduced to an...
F. Zimmermann, C. Johnstone, M. Berz, Erdelyi Makino Wan, K. Makino, W. Wan
Quadrupole fringe fields can limit the dynamic aperture of muon storage rings. Using the computer code COSY INFINITY for particle tracking and normal-form analysis, we evaluate the importance of...
We evaluate the dynamic aperture for the CERN muon storage ring, and, in particular, study the effect of magnet fringe fields. The detuning with amplitude is computed via normal-form analysis....
Improvements in Faktor2, A code to Simulate Collective Effects of Electrons and Ions (2007)
Bruns, W, Schulte, D, Zimmermann, F
The electrostatic Particle in Cell code 'Faktor2' is extended to 3D, and is partly parallelised. Results for electron cloud buildup in wigglers and in end regions of damping ring dipoles for next...
Superconductive Damping Wigglers for the CLIC Project (2007)
Baumbach, T, Bernard, A, Braun, H, Casalbuoni, S, Grau, A, Hagelstein, M, ...
The CLIC damping ring requires wigglers with both high on-axis fields and short periods. The present design foresees a superconductive wiggler with a period length of 5 cm, a peak on-axis field of...
Beam-Beam Effect with an External Noise in LHC (2007)
Ohmi, K, Calaga, R, Höfle, Wolfgang, Tomás, R, Zimmermann, F
In absence of synchrotron radiation, proton beams do not have any damping mechanism for incoherent betatron motion. A noise, which kicks beam particles in the transverse plane, gives a coherent...
BPM calibration independent LHC optics correction (2007)
Calaga, R, Tomás, R, Zimmermann, F
The tight mechanical aperture for the LHC imposes severe constraints on both the beta and dispersion beating. Robust techniques to compensate these errors are critical for operation of high intensity...
Tomás, R, Arduini, Gianluigi, Calaga, R, Faus-Golfe, A, Rumolo, G, Zimmermann, F
In recent years several measurements of the SPS nonlinear chromaticity have been performed in order to determine the non-linear optics model of the SPS machine at injection energy for different...
Joint CARE-ELAN, CARE-HHH-APD, and EUROTEV-WP3 Workshop on Electron Cloud Clearing (2007)
Caspers, F, Scandale, Walter, Schulte, D, Zimmermann, F
This report contains the Proceedings of the joint CARE-HHH-APD, CARE-ELAN, and EUROTEV-WP3 Mini-Workshop on 'Electron Cloud Clearing - Electron Cloud and Technical Consequences', "ECL2", held at CERN...
Two-Beam Resistive-Wall Wake Field (2007)
In storage-ring colliders, two beams propagating in opposite direction share a common beam pipe over parts or all of the ring circumference. The resistive-wall wake field coupling bunches of these...
LHC beam-beam compensation using wires and electron lenses (2007)
Dorda, U, Fischer, W, Shiltsev, V, Zimmermann, F
We present weak-strong simulation results for a possible application of current-carrying wires and electron lenses to compensate the LHC long-range and head-on beambeam interaction, respectively, for...
Space-Charge Compensation Options for the LHC Injector Complex (2007)
Aiba, M, Chanel, M, Dorda, U, Franchetti, G, Garoby, R, Koutchouk, Jean-Pierre, ...
Space-charge effects have been identified as the most serious intensity limitation in the CERN PS and PS Booster, on the way towards ultimate LHC performance and beyond. We here explore the...
Transverse Impedance of LHC Collimators (2007)
Métral, E, Arduini, Gianluigi, Assmann, Ralph Wolfgang, Boccardi, A, Bracco, C, Bohl, T, ...
The transverse impedance in the LHC is expected to be dominated by the numerous collimators, most of which are made of Fibre-Reinforced-Carbon to withstand the impacts of high intensity proton beams...
The EU CARE-HHH and US-LARP studies for an LHC luminosity upgrade aim at increasing the peak luminosity by a factor of 10, to 1035 cm-2s-1. The luminosity can be raised by rebuilding the interaction...
A New Type of distributed Enamel based Clearing Electrode (2007)
Kroyer, T, Behler, F J, Caspers, F, Hellmond, P, Métral, E, Wendel, J C, ...
Clearing electrodes can be used for electron cloud (EC) suppression in high intensity particle accelerators. In this paper the use of low and highly resistive layers on a dielectric substrate are...
Modeling Incoherent Electron Cloud Effects (2007)
Benedetto, E, Fischer, W, Franchetti, G, Rumolo, G, Ohmi, K, Pivi, M, ...
Incoherent electron effects could seriously limit the beam lifetime in proton or ion storage rings, such as LHC, SPS, or RHIC, or blow up the vertical emittance of positron beams, e.g., at the B...
Transverse impedance of LHC collimators (2007)
Metral, E, Arduini, G, Assmann, R, Boccardi, A, Bohl, T, Caspers, F, ...
The transverse impedance in the LHC is expected to be dominated by the numerous collimators, most of which are made of Fibre-Reinforced-Carbon to withstand the impacts of high intensity proton beams...
Beam heat load measurements in the cold bore superconductive undulator installed at ANKA. (2007)
Casalbuoni, S., Hagelstein, M., Kostka, B., Rossmanith, R., Mashkina, E., Steffens, E., ...
Frühjahrstagung DPG, Fachverband Teilchenphysik, Heidelberg, 5.-9.März 2007
Beam heat load and pressure rise in a cold vacuum chamber. (2007)
Casalbuoni, S., Grau, A., Hagelstein, M., Rossmanith, R., Zimmermann, F., Kostka, B., ...
Physical Review Special Topics - Accelerators and Beams, 10(2007) S.093202/1-9
Aksakal, H, Nergiz, Z, Schulte, D, Zimmermann, F, Çiftçi, A K
Gamma-proton collisions allow unprecedented investigations of the low x and high $Q^{2}$ regions in quantum chromodynamics. In this paper, we investigate the luminosity for "ILC"$\times$LHC...
Aksakal, H, Nergiz, Z, Schulte, D, Zimmermann, F, Çiftçi, A K
Gamma-proton collisions allow unprecedented investigations of the low x and high $Q^{2}$ regions in quantum chromodynamics. In this paper, we investigate the luminosity for "ILC"$\times$LHC...
Aksakal, H., Ciftci, A. K., Nergiz, Z., Schulte, D., Zimmermann, F.
Gamma-proton collisions allow unprecedented investigations of the low x and high $Q^{2}$ regions in quantum chromodynamics. In this paper, we investigate the luminosity for "ILC"$\times$LHC...
Beam dynamics in Compton ring gamma sources (2006)
Bulyak, E., Gladkikh, P., Skomorokhov, V., Omori, T., Urakawa, J., Moenig, K., ...
Electron storage rings of GeV energy with laser pulse stacking cavities are promising intense sources of polarized hard photons which, via pair production, can be used to generate polarized positron...
Beam dynamics in Compton ring gamma sources. (2006)
E. Bulyak, P. Gladkikh, V. Skomorokhov, T. Omori, J. Urakawa, ...
Journal article
Electron Cloud in Wigglers. (2006)
F. Zimmermann, DESY Maschinenphysik, D. Schulte, R. Cimino, C. Vaccarezza, M. Zobov, ...
Internal report | Preprint
M. Pivi, DESY Maschinenphysik, L. Wang, K. Ohmi, R. Wanzenberg, ...
Contribution to a conf. proceeding (book/online)
B. Grishanov, DESY Maschinenphysik, P. Logachev, F. Podgorny, V. Telnov, D. Angal-Kalinin, ...
Internal report | Preprint
Configuration Studies and Recommendations for the ILC Damping Rings. (2006)
K.L. Bane, DESY Maschinenphysik, D.P. Barber, Y. Cai, A. Dragt, L. Emery, ...
Internal report | Preprint
Beam dynamics in Compton ring gamma sources (2006)
Bulyak, E., Gladkikh, P., Skomorokhov, V., Omori, T., Urakawa, J., Moenig, K., ...
Electron storage rings of GeV energy with laser pulse stacking cavities are promising intense sources of polarized hard photons which, via pair production, can be used to generate polarized positron...
Beam dynamics in Compton ring gamma sources (2006)
Bulyak, E., Gladkikh, P., Skomorokhov, V., Omori, T., Urakawa, J., Moenig, K., ...
Electron storage rings of GeV energy with laser pulse stacking cavities are promising intense sources of polarized hard photons which, via pair production, can be used to generate polarized positron...
Simulation of the electron cloud for various configuration of a damping ring for the ILC (2006)
Wolski, A, Pivi, M, Raubenheimer, T, Wang, L, Ohmi, K, Wanzenberg, R, ...
In the beam pipe of the positron damping ring of the International Linear Collider (ILC), an electron cloud may be first produced by photoelectrons and ionization of residual gases and then increased...
Test Beam Studies at SLAC's End Station A, for the International Linear Collider (2006)
Woods, M, Adey, D, Adolphsen, C, Albrecht, M, Allison, WWM, Angal-Kalinin, Deepa, ...
Luminosity Tuning at the Interaction Point (2006)
Eliasson, P, Korostelev, M, Schulte, D, Tomas, R, Zimmermann, F
Minimizing Emittance for the CLIC Damping Ring (2006)
Braun, H-H, Korostelev, M, Levitchev, E, Piminov, P, Schulte, D, Sinyatkin, S, ...
Design of a Polarised Positron Source Based on Laser Compton Scattering (2005)
Araki, S., Higashi, Y., Honda, Y., Kurihara, Y., Kuriki, M., Okugi, T., ...
We describe a scheme for producing polarised positrons at the ILC from polarised X-rays created by Compton scattering of a few-GeV electron beam off a CO2 or YAG laser. This scheme is very energy...
Woods, M., Erickson, R., Frisch, J., Hast, C., Jobe, R. K., Keller, L., ...
The SLAC Linac can deliver damped bunches with ILC parameters for bunch charge and bunch length to End Station A. A 10Hz beam at 28.5 GeV energy can be delivered there, parasitic with PEP-II...
Araki, S., Hayano, H., Higashi, Y., Honda, Y., Kanazawa, K., Kubo, K., ...
To reach design luminosity, the International Linear Collider (ILC) must be able to create and reliably maintain nanometer size beams. The ATF damping ring is the unique facility where ILC emittances...
Araki, S., Hayano, H., Higashi, Y., Honda, Y., Kanazawa, K., Kubo, K., ...
To reach design luminosity, the International Linear Collider (ILC) must be able to create and reliably maintain nanometer size beams. The ATF damping ring is the unique facility where ILC emittances...
Araki, S., Hayano, H., Higashi, Y., Honda, Y., Kanazawa, K., Kubo, K., ...
To reach design luminosity, the International Linear Collider (ILC) must be able to create and reliably maintain nanometer size beams. The ATF damping ring is the unique facility where ILC emittances...
Beschleunigerphysik am ANKA Speichering. (2005)
Müller, A.S., Kalefa, A.B., Birkel, I., Giovannozzi, M., Huttel, E., Perez, F., ...
Physik seit Albert Einstein : 69.Jahrestagung der DPG, Berlin, 4.-9.März 2005
Physics at the CLIC Multi-TeV Linear Collider (2004)
Aranda, A., Ateser, E., Balazs, C., Bardin, D., Barklow, T., ...
This report summarizes a study of the physics potential of the CLIC e+e- linear collider operating at centre-of-mass energies from 1 TeV to 5 TeV with luminosity of the order of 10^35 cm^-2 s^-1....
Study of Pb-Bi corrosion of structural and fuel cladding materials for nuclear applications. (2004)
Müller, G., Schumacher, G., Weisenburger, A., Heinzel, A., Zimmermann, F., Furukawa, T., ...
JNC TY9400 2003-026 (January 2004)
Study of Pb-Bi corrosion of structural and fuel cladding materials for nuclear applications. (2004)
Müller, G., Schumacher, G., Weisenburger, A., Heinzel, A., Zimmermann, F., Furukawa, T., ...
JNC TY9400 2003-028 (January 2004)
Corrosion behavior of FBR candidate materials in stagnant Pb-Bi at elevated temperature. (2004)
Furukawa, T., Müller, G., Schumacher, G., Weisenburger, A., Heinzel, A., Zimmermann, F., ...
Journal of Nuclear Science and Technology, 41(2004) S.265-70
Investigation of scraper induced wakefields. (2004)
Müller, A.S., Birkel, I., Huttel, E., Perez, F., Pont, M., Zimmermann, F.
ANKA - Annual Report 2004 S.167-69
Studies of current dependent effects at the ANKA storage ring. (2004)
Müller, A.S., Birkel, I., Huttel, E., Perez, F., Pont, M., Zimmermann, F.
ANKA - Annual Report 2004 S.171-73
Behavior of steels in flowing liquid PbBi eutectic alloy at 420-600 `0C after 4000 - 7200 h. (2004)
Müller, G., Heinzel, A., Konys, J., Schumacher, G., Weisenburger, A., Zimmermann, F., ...
3rd Internat.Workshop on Materials for Hybrid Reactors and Related Technologies, Roma, I, October 13-15, 2003
Electron Cloud Studies for KEKB and ATF (2003)
Kek March March, F. Zimmermann
I describe a few recent electron-cloud simulations for KEKB and the ATF. For KEKB the dependence of the electron build up on the peak solenoid field is studied, for the ATF the minimum bunch...
Application of pulsed electron beams for improvement of material surface properties. (2003)
Müller, G., Engelko, V., Bluhm, H., Heinzel, A., Schumacher, G., Strauss, D., ...
Mehlhorn, T.A. [Hrsg.]
High power particle beams and pulsed power for industrial applications. (2003)
Bluhm, H.J., An, W., Engelko, V., Giese, H., Frey, W., Heinzel, A., ...
Mehlhorn, T.A. [Hrsg.]
Corrosion properties of Japanese FBR materials in stagnant Pb-Bi at elevated temperature. (2003)
Furukawa, T., Müller, G., Schumacher, G., Weisenburger, A., Heinzel, A., Zimmermann, F., ...
Proc.of the 11th Internat.Conf.on Nuclear Engineering (ICONE-11), Tokyo, J, April 20-23, 2003
The study of a European Neutrino Factory complex (2002)
Gruber, P, Aleksa, M, Amand, JF, Autin, B, Baldy, JL, Benedikt, M, ...
European Organization For Nuclear Research (2002)
In this report, I address 4 different items: (1) the trapping of electrons in a quadrupole field, (2) the electron-cloud build up inside an HER dipole magnet, (3) the closed orbit drift with SVD...
Results of steel corrosion tests in flowing liquid Pb/Bi at 420-600`0C after 2000 h. (2002)
Müller, G., Heinzel, A., Konys, J., Schumacher, G., Weisenburger, A., Zimmermann, F., ...
Proc.of the 2nd Internat.Topical Workshop on Materials for Hybrid Reactors and Related Technologies, Brasimone, I, April 18-20, 2001
Behandlung von MCrAlY-Schutzschichten mit Grundlagenuntersuchungen zur Strahlerzeugung. (2002)
Müller, G., Huber, R., Schumacher, G., Bluhm, H., An, V., Strauss, D., ...
Programm Nukleare Sicherheitsforschung. Jahresbericht 2001. Teil 1
Müller, G., Bluhm, H., Heinzel, A., Schumacher, G., Strauss, D., Weisenburger, A., ...
Power Modulator Conf., Hollywood, Calif., June 30 - July 3, 2002
Müller, G., Schumacher, G., Weisenburger, A., Heinzel, A., Zimmermann, F., Furukawa, T., ...
JNC TY9400 2002-016 (June 2002)
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...
Sps Sps Measurements, G. Arduini, P. Collier, F. Zimmermann, A. Faus-golfe
Contents 1 Introduction 2 2 Linear and Nonlinear Chromaticity Measurements 2 3 Measurements of Detuning with Amplitude 2 4 Matching of Linear and Nonlinear Chromaticity 4 4.1 Tunes . ....
Müller, G., Schumacher, G., Strauss, D., Zimmermann, F., Bluhm, H., Engelko, V.
13th Internat.Conf.on High-Power Particle Beams, Nagaoka, J, June 25-30, 2000
Conceptional design of the pulsed electron beam facility GESA II. (2001)
Müller, G., Engelko, D.V., Andreev, A., Komarov, O., Strauss, G., Schumacher, G., ...
13th Internat.Conf.on High-Power Particle Beams, Nagaoka, J, June 25-30, 2000
Bluhm, H., Müller, G., Schumacher, G., Strauss, D., Zimmermann, F., Engelko, V.
Displays and Vacuum Electronics : Contributions to the 9th ITG-Conf., Garmisch-Partenkirchen, May 2-3, 2001
Pulsed power science and technology at Forschungszentrum Karlsruhe. (2001)
Bluhm, H., Baumung, K., Böhme, R., Frey, W., Giese, H., Heinzel, A., ...
PPA 2001 : Internat.Conf.on Pulsed Power Applications, Gelsenkirchen, March 27-29, 2001
Müller, G., Strauss, D., Schumacher, G., Zimmermann, F., Bluhm, H., Engelko, V.
PPA 2001 : Internat.Conf.on Pulsed Power Applications, Gelsenkirchen, March 27-29, 2001
Behandlung von MCrAlY-Schutzschichten mit Grundlagenuntersuchungen zur Strahlerzeugung. (2001)
Müller, G., Huber, R., Schumacher, G., Strauss, D., Zimmermann, F., Engelko, V.
Programm Nukleare Sicherheitsforschung. Jahresbericht 2000
A Feasibility study of a neutrino source based on a muon storage ring (2000)
Holtkamp, N, Finley, DA, Anderson, T, Andreev, N, Ankenbrandt, CM, Assadi, S, ...
Head-Tail Instability Caused By Electron Cloud in Positron Storage Rings (2000)
And Zimmermann Kek, K. Ohmi, F. Zimmermann
In positron or proton storage rings with many closely spaced bunches, a large number of electrons can be generated in the vacuum chamber due to photoemission or secondary emission. The density of...
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...
Third Experiment to measure Resonance Driving Terms in the SPS (2000)
M. Albert, G. Arduini, K. Cornelis, T. Hahn, F. Zimmermann, A. Faus-golfe, ...
Contents 1 Aim of the Experiment. 2 2 Experimental Set--up of the SPS in November 5, 1999. 2 3 Procedure. 3 4 Results and Analysis. 3 4.1 Sextupoles . ...................................... 3 4.2...
Oxide scale growth on MCrAlY coatings after pulsed electron beam treatment. (2000)
Müller, G., Schumacher, G., Strauss, D., Zimmermann, F., Engelko, V.I.
Markovits, M. [Hrsg.]
Investigation on oxygen controlled liquid lead corrosion of surface treated steels. (2000)
Müller, G., Schumacher, G., Zimmermann, F.
Journal of Nuclear Materials, 278(2000) S.85-95
Behandlung von MCrAlY-Schutzschichten. (2000)
Huber, R., Müller, G., Schumacher, G., Strauss, D., Zimmermann, F.
Projekt Nukleare Sicherheitsforschung. Jahresbericht 1999.
Knebel, J.U., Fellmoser, F., Lefhalm, C., Mack, K., Pettan, C., Piecha, H., ...
Projekt Nukleare Sicherheitsforschung. Jahresbericht 1999.
Nonlinear longitudinal dynamics studies at the ALS (1999)
Byrd, J.M., De Santis, S., Li, D., Stupakov, G., Zimmermann, F.
Müller, G., Schumacher, G., Strauss, D., Zimmermann, F., Engelko, V.
Nachrichten - Forschungszentrum Karlsruhe, 31(1999) S.5-12
Investigation on oxygen controlled liquid lead corrosion of surface treated steels. (1999)
Heinzel, A., Huber, R., Müller, G., Schumacher, G., Zimmermann, F.
Projekt Nukleare Sicherheitsforschung. Jahresbericht 1998.
Investigation on oxygen controlled liquid lead corrosion of surface treated steels. (1999)
Müller, G., Schumacher, G., Zimmermann, F.
Konys, J. [Hrsg.]
Bluhm, H., Böhme, R., Frey, W., Giese, H., Hoppe, P., Kessler, G., ...
11th IEEE Internat.Pulsed Power Conf., Baltimore, Md., June 29 - July 2, 1997
Electron-Cloud Effects In High-Luminosity Colliders (1997)
Zimmermann Stanford Linear, F. Zimmermann
Electron-cloud instabilities are expected to be important in most high-luminosity double-ring colliders. In this report, I describe a few parameter regimes and some critical parameter dependences of...
Gepulste Elektronenstrahlanlage GESA. (1997)
Müller, G., Schumacher, G., Strauss, D., Zimmermann, F., Engelko, V.
Frühjahrstagung DPG, Atomphysik, Kurzzeitphysik, Massenspektrometrie, Molekülphysik, Plasmaphysik, Quantenoptik, Mainz, 3.-6.März 1997
Tools-supported HPF and MPI Parallelization of the NAS Parallel Benchmarks (1996)
C. C. Clémençon, Calcolo Scientifico, V. R. Deshpande, A. Endo, J. Fritscher, ...
. High Performance Fortran (HPF) compilers and communication libraries with the standardized Message Passing Interface (MPI) are becoming widely available, easing the development of portable parallel...
A Final Focus System For The Next Linear Collider (1995)
Zimmermann Brown Emma, F. Zimmermann, K. Brown, P. Emma, R. Helm, J. Irwin, ...
The final focus of the Next Linear Collider (NLC) demagnifies electron and positron beams of 250--750 GeV energy down to a transverse size of about 2#5 # 350 nm 2 at the interaction point (IP). The...
Goeckeler, M., Kastrup, H. A., Westphalen, J., Zimmermann, F.
According to a proposal of Luescher it is possible to determine elastic scattering phases in infinite volume from the energy spectrum of two-particle states in a periodic box. We demonstrate the...
Architecture and Programmability of the NEC Cenju-3 (1994)
C. Clémençon, T. Maruyama, N. Masuda, A. Muller, R. Ruhl, W. Sawyer, ...
: The Joint CSCS-ETH/NEC Collaboration in Parallel Processing is one of the major research projects currently conducted at CSCS. This project comprises the development of the portable integrated tool...
C. Clémençon, C. Cl, K. M. Decker, A. Endo, J. Fritscher, G. Jost, ...
The Joint CSCS-ETH/NEC Collaboration in Parallel Processing comprises the development of an integrated tool environment together with applications and algorithms for distributed-memory parallel...
Brusa, R., Zimmermann, F., Weiher, H., Karasawa, M., Seeburg, P.H., Sprengel, R.
Cold Spring Harbor Conf.on Mouse Molecular Genetics, Cold Spring Harbor, N.Y., August 30 - September 4, 1994
Scattering phases in the broken phase of the 4-d O(4) non-linear sigma-model (1993)
Westphalen, J., Zimmermann, F., Goeckeler, M., Kastrup, H. A.
Using Luescher's method we determine the elastic scattering phases in the broken phase of the 4-dimensional O(4) non-linear sigma-model from the two-particle energy spectrum in a Monte-Carlo study on...
Advances in Cryogenic Engineering Materials, 26(1980) S.432-41
CEC/ICMC'79, Cryogenic Engineering Conf. Board, Madison, Wisconsin, USA, August 21-24, 1979
Temperatur- und Magnetfeldabhaengigkeit des Pinningverhalten fuer Nb§3Sn-Supraleiterdraht. (1978)
Diplomarbeit, Univ.Karlsruhe 1977
Fruehjahrstagung DPG, Festkoerperphysik, Muenster, 7.-12.Maerz 1977. Verhandlungen der Deutschen Physikalischen Gesellschaft, R.6, Bd 12(1977) S.400
Hagen, U., Keck, K., Zimmermann, F., Kroeger, H.
Strahlentherapie, 132 (1967) Heft 1, S. 40-50
Nature and Effect of Pyocyanase and its Application in Dentistry. (1910)
Editors: Aug. 1859-July 1865, J. D. White, J. H. McQuillen, G. J. Ziegler.--Aug. 1865-Dec. 1871, J. H. McQuillen, G. J. Ziegler.--Jan. 1872-May 1891, J. W. White.--July 1891-Apr. 1930, E. C. Kirk...
Doxycycline-mediated quantitative and tissue-specific control of gene expression in transgenic mice.
Kistner, A, Gossen, M, Zimmermann, F, Jerecic, J, Ullmer, C, Lübbert, H, ...
The tet regulatory system in which doxycycline (dox) acts as an inducer of specifically engineered RNA polymerase II promoters was transferred into transgenic mice. Tight control and a broad range of...
Ganten, D, Wagner, J, Zeh, K, Bader, M, Michel, J B, Paul, M, ...
The renin-angiotensin system (RAS) is the most important regulatory system of electrolyte homeostasis and blood pressure. We report here the development of transgenic rats carrying the human...
High blood pressure in transgenic mice carrying the rat angiotensinogen gene.
Kimura, S, Mullins, J J, Bunnemann, B, Metzger, R, Hilgenfeldt, U, Zimmermann, F, ...
Transgenic mice were generated by injecting the entire rat angiotensinogen gene into the germline of NMRI mice. The resulting transgenic animals were characterized with respect to hemodynamics,...
Apparent intracellular Mg2+ buffering in neurons of the leech Hirudo medicinalis.
Günzel, D, Zimmermann, F, Durry, S, Schlue, W R
The apparent intracellular Mg2+ buffering, or muffling (sum of processes that damp changes in the free intracellular Mg2+ concentration, [Mg2+](i), e.g., buffering, extrusion, and sequestration), was...
Prospects for a Large Hadron Electron Collider (LHeC) at the LHC
Klein, M, Aksakal, H, Bordry, F, Braun, H-H, Brüning, OS, Burkhardt, H, ...
Measurement Of The Effect Of Collimator Generated Wakefields On The Beams In The Slc
Bane Adolphsen Decker, C. Adolphsen, P. Emma, P. Krejcik, ...
this paper we present the results together with a comparison to theoretical predictions. Besides helping us to quantify the effect of the collimators in the SLC these results are also useful in...
Emittance And Energy Control In The Nlc Main Linacs
Adolphsen Bane Kubo, C. Adolphsen, K. Kubo, T. Raubenheimer, R. D. Ruth, ...
We discuss tolerances and correction schemes needed to control single- and multi-bunch emittance in the NLC main linacs. Specifications and design of emittance diagnostic stations will be presented....
Zimmermann Raubenheimer And, F. Zimmermann, T. O. Raubenheimer, G. Stupakov
Mutually driven transverse oscillations of an electron beam and residual gas ions may result in a fast transverse instability. This effect arises either during a single pass of a train of electron...
Lorenzen, S, Brücher, B, Zimmermann, F, Geinitz, H, Riera, J, Schuster, T, ...
Oxaliplatin and 5-fluorouracil have a significant activity in locally advanced oesophageal squamous cell cancer (OSCC). However, their optimal dosage and efficacy when combined with concurrent...