High Intensity Beams from the CERN PS Booster (2009)
Mikulec, B, Chanel, M, Findlay, A, Hanke, K, Quatraro, D, Rumolo, G, ...
The CERN Proton Synchrotron Booster (PSB) has been running for more than 30 years. Originally designed to accelerate particles from 50 to 800 MeV, later upgradedto an energy of 1 GeV and finally 1.4...
Coherent tune shift and instabilities measurements at the CERN Proton Synchrotron Booster (2009)
Quatraro, D, Rumolo, G, Blas, A, Chanel, M, Findlay, A, Mikulec, B
To understand one of the contributions to the intensity limitations of the CERN Proton Synchrotron Booster (PSB) in view of its operation with beams from Linac 4, the impedance of the machine has...
Lattice Issues of the CERN PSB with H- Charge exchange injection hardware (2009)
Aiba, M, Carli, C, Chanel, M, Goddard, B, Martini, M, Weterings, W
The motivation for the construction of CERN Linac4 is to improve the performance of the PSB by raising the injection energy and implementing a new H- charge exchange multiturn injection scheme....
Ions for LHC: Towards Completion of the Injector Chain (2008)
Manglunki, Django, Albert, M, Angoletta, M E, Arduini, Gianluigi, Baudrenghien, P, Bellodi, G, ...
The commissioning of CERN's ion injector complex [1] to allow 1.1 PeV collisions of ions in LHC is well under way. After the Low Energy Ion Ring (LEIR) in 2005 [2] and the Proton Synchrotron (PS) in...
Cooled Beam Diagnostics on LEIR (2008)
Tranquille, G, Bal, C, Carli, C, Chanel, M, Prieto, V, Sautier, R, ...
Electron cooling is central in the preparation of dense bunches of lead beams for the LHC. Ion beam pulses from the LINAC3 are transformed into short highbrightness bunches using multi-turn...
IONS FOR LHC: STATUS OF THE INJECTOR CHAIN (2008)
D. Manglunki, A. Beuret, J. Borburgh, Ch. Carli, M. Chanel, L. Dumas, ...
The LHC will, in addition to proton runs, be operated with Pb ions and provide collisions at energies of 5.5 TeV per nucleon pair, i.e. more than 1.1 PeV per event, to experiments. The transformation...
LEIR: TOWARDS THE NOMINAL LEAD ION BEAM (2008)
M. Chanel, M. E Angoletta, V. Baggiolini, P. Belochitskii, A. Beuret, A. Blas, ...
The Low Energy Ion Ring (LEIR) is a central piece for LHC ion operation at CERN, transforming long Linac3 pulses into high density bunches needed for LHC. The first phase of LEIR commissioning...
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...
Impedance Measurements with Strongly Cooled Beams at LEAR (2008)
J. Bosser, M. Chanel, D. Manglunki, D. Miihl, F. Pedersen, G. Tranquille
© 1991 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material
Neutralisation Of The Lear Electron-Cooling Beam: Experimental Results (2007)
Bosser Caspers Chanel, J. Bosser, F. Caspers, M. Chanel, R. Ley, R. Maccaferri, ...
This paper reports on the technological aspects, the measurement techniques and the results. I. INTRODUCTION
B. Autin, M. Chanel, J. Gareyte, R. Garoby, M. Giovannozzi, H. Haseroth, ...
The proton driver for a neutrino factory must provide megawatts of beam power at a few GeV, with nanosecond long bunches each containing more than 1×10 12 protons. Such beam powers are within reach...
FIRST CONCLUSIONS OF THE LOSSES MANAGEMENT WORKING GROUP (2007)
J. Borburgh, R. Brown, M. Chanel, V. Vohan, M. Gourber-pace, S. Hancock, ...
At the PPC meeting which was held on October 6 th, 2000, it was decided to create a sub-panel “to study the problem of the beam losses in view of the possibility that the average beam intensity...
Transverse Performance Of The Proton Beam Delivered (2007)
The Cern Ps, M. Benedikt, C. Carli, M. Chanel, G. Cyvoct, M. Giovannozzi, ...
The performance of the CERN LHC will depend heavily on the high-brightness beam delivered by the injector chain. In 1999, after completion of the programme of hardware upgrades of the PS Complex, a...
European Organization For Nuclear Research (2007)
Organisation Europeenne Pour, Pour La, Recherche Nucleaire, B. Autin, M. Chanel, M. Giovannozzi, ...
This note reports a number of different layouts for designing a high intensity proton driver. Such a machine should perform beam accumulation and bunch compression in order to achieve the performance...
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...
IONS FOR LHC: STATUS OF THE INJECTOR CHAIN (2007)
Manglunki, Django, Beuret, A, Borburgh, J, Carli, C, Chanel, M, Dumas, L, ...
The LHC will, in addition to proton runs, be operated with Pb ions and provide collisions at energies of 5.5 TeV per nucleon pair, i.e. more than 1.1 PeV per event, to experiments. The transformation...
Radiation dose measurements around the CERN high-energy accelerators : PSB, PS and SPS (2007)
Bossard, P, Chanel, M, Coninckx, F, Izycka, A, Nielsen, M, Schönbacher, Helmut, ...
Carli, C, Belochitskii, P, Chanel, M, Pasternak, J
The Low Energy Ion Ring (LEIR) is a low energy ion cooling and accumulation ring and serves to compress long ion pulses from Linac3 into high density bunches suitable for LHC ion operation. Issues of...
Performance of nominal and ultimate LHC beams in the CERN PS Booster (2006)
Benedikt, Michael, Chanel, M, Hanke, K
The requirements for nominal and ultimate LHC beams in the CERN PS-Booster were specified in 1994 and served as input for the definition of the "PS conversion for LHC" project. Already during the...
Design and Validation with Measurements of the LEIR Injection Line (2006)
Roncarolo, F, Carli, C, Chanel, M, Dumas, L, Scrivens, R
The CERN Low Energy Ion Ring (LEIR) commissioning started in the year 2005. O4+and Pb54+ion beams are transferred at 4.2 MeV/nucleon from Linac 3 to LEIR through a low energy transfer line, for which...
Benedikt, Michael, Carli, Christian, Chanel, M, Schmidt, F, Urschütz, Peter
High brightness and high intensity beams are required from the PS Booster for LHC, CNGS and ISOLDE operation. The large space charge tune spreads associated with these beams, especially at injection,...
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...
Optimum Lattice Functions for Electron Cooling (2003)
Carli, Christian, Bosser, Jacques, Chanel, M, Maury, S, Möhl, D, Tranquille, G
Cooling down time measurements carried out at LEAR with 4.2 MeV/nucleon Pb54+ ions and various combinations of lattice functions led to unexpected results. Notably, a finite dispersion was found to...
Belochitskii, P, Bosser, Jacques, Caspers, Friedhelm, Chanel, M, Eriksson, T, Holzer, E B, ...
To provide efficient deceleration and to produce antiproton beam with the required characteristics two different cooler systems (stochastic and electron) are used in operation on the AD (Antiproton...
New Methods to Create Hollow Bunches (2002)
New methods to create hollow distributions in longitudinal phase space based on manipulations with a double harmonic RF system at high energy are presented with application to the PS Booster...
Lattice Design Studies for the CERN Proton Driver Accumulator and Compressor (2002)
Autin, Bruno, Carli, Christian, Chanel, M, Giovannozzi, Massimo, Martini, M, Royer, P
The CERN baseline scenario for a Neutrino Factory comprises accumulation and compression of the beam delivered by a 2.2 GeV kinetic H- linac, to provide the time structure needed on the target....
Creation of Hollow Bunches by Redistribution of Phase Space Surfaces (2002)
The creation of hollow bunches in longitudinal phase space, in order to decrease the peak current and hence the transverse direct space charge forces, is an old idea. A new method to create such a...
LEIR: The low energy ion ring at CERN (2002)
Amongst all the modifications of the PS Complex to produce the LHC ion beams, the conversion of the old Low Energy Antiproton Ring (LEAR) into the Low Energy Ion Ring (LEIR) is a major issue. The...
Ion Accumulation for LHC (2001)
The overall modifications of the PS complex (Linac3, LEIR, PS) to produce the LHC ion beams is described. While the main emphasis is put on lead, some considerations will be given to other ion...
Experimental Investigation of Impact-Induced Molecular Desorption by 4.2 MeV/u Pb ions (2001)
Chanel, M, Hansen, J, Laurent, Jean Michel, Madsen, N, Mahner, E
In preparation for the heavy ion program of the LHC, accumulation and cooling test with lead ion beams have been performed in the LEAR storage ring. These tests have revealed that due to the...
Performance of the LHC Pre-Injectors (2001)
Benedikt, Michael, Cappi, R, Chanel, M, Garoby, R, Giovannozzi, Massimo, Hancock, S, ...
The LHC pre-injector complex, comprising Linac 2, the PS Booster (PSB) and the PS, has undergone a major upgrade in order to meet the very stringent requirements of the LHC. Whereas bunches with the...
Analysis of different options for a high intensity proton driver for neutrino factory (2000)
Autin, Bruno, Chanel, M, Giovannozzi, Massimo, Martini, M
This note reports a number of different layouts for designing a high intensity proton driver. Such a machine should perform beam accumulation and bunch compression in order to achieve the performance...
Proton Drivers for Neutrino Factories: The CERN Approach (2000)
Schönauer, Horst Otto, Autin, Bruno, Bongardt, K, Cappi, R, Chanel, M, Franchetti, Giuliano, ...
The paper describes the CERN approach for a proton driver for a Neutrino Factory. Two main layouts are presented: the so-called CERN Reference Scenario, based on a 2.2 GeV linac and an alternative...
The PS complex produces the nominal LHC beam (2000)
Benedikt, Michael, Blas, A, Borburgh, J, Cappi, R, Chanel, M, Chohan, V, ...
The LHC [1] will be supplied, via the SPS, with protons from the pre-injector chain comprising Linac2, PS Booster (PSB) and PS. These accelerators have under-gone a major upgrading programme [2]...
Reduction of the Impedance Created by the Insulated Vacuum Flanges in the PS Booster (2000)
Blas, A, Chanel, M, Carli, Christian, Lacroix, C
The original vacuum flange assembly in the PS Booster (PSB) was designed to present insulation at low frequency and conduction to the beam image current above 2 MHz. However, in order to satisfy the...
Reduction of the Impedance Created by the Insulated Vacuum Flanges in the PS Booster (2000)
Blas, A, Chanel, M, Carli, Christian, Lacroix, C
The original vacuum flange assembly in the PS Booster (PSB) was designed to present insulation at low frequency and conduction to the beam image current above 2 MHz. However, in order to satisfy the...
When a beam in a synchrotron is subjected to transverse cooling, the betatron oscillation amplitudes of the individual particles are reduced. A method to establish the velocity of the amplitude...
Transverse Performance of the Proton Beam Delivered by the CERN PS Complex for the Future LHC (2000)
Benedikt, Michael, Cappi, R, Carli, Christian, Chanel, M, Cyvoct, G, Giovannozzi, Massimo, ...
The performance of the CERN LHC will depend heavily on the high-brightness beam delivered by the injector chain. In 1999, after completion of the programme of hardware upgrades of the PS Complex, a...
Design of a 2.2 GeV Accumulator and Compressor for a Neutrino Factory (2000)
Autin, Bruno, Cappi, R, Chanel, M, Gareyte, Jacques, Garoby, R, Giovannozzi, Massimo, ...
The proton driver for a neutrino factory must provide megawatts of beam power at a few GeV, with nonosecond long bunches each containing more than 1x1012 protons. Such beam powers are within reach of...
Application of Wigglers to Quasi-isochronous Transport Systems (2000)
Giovannozzi, Massimo, Autin, Bruno, Chanel, M, Martini, M, Royer, P
The transition energy of a circular machine based on standard FODO lattices depends on the horizontal optics of the cell and, therefore, on the average radius of the machine. This property imposes...
Proton Drivers for Neutrino Factories: The CERN Approach (2000)
H. Schönauer, B. Autin, M. Chanel, G. Franchetti, J. Gareyte, R. Garoby, ...
This article concentrates on the accumulator and compressor rings of the CERN Reference Scenario; the SPL was presented at this Workshop by R. Garoby and is well-documented [1]. Only a section is...
On the Optimum Dispersion of a Storage Ring for Electron Cooling with High Space Charge (1999)
Bosser, Jacques, Carli, Christian, Chanel, M, Marié, L, Möhl, D, Tranquille, G
With the intense electron beams used for cooling, matching of the ion and electron velocity over the largest possible fraction of the beam profile becomes important. In this situation, a finite...
Stability of cooled beams (1999)
Bosser, Jacques, Carli, Christian, Chanel, M, Madsen, N, Maury, S, Möhl, D, ...
Because of their high density together with extremely small spreads in betatron frequency and momentum, cooled beams are very vulnerable to incoherent and coherent space-charge effects and...
The production of dense lead-ion beams for the CERN LHC (1999)
Bosser, Jacques, Carli, Christian, Chanel, M, MacCaferri, R, Molinari, G, Maury, S, ...
To reach the design luminosity for lead-ions in the LHC, the present Low Energy Antiproton Ring (LEAR) has to be converted into a Low Energy Ion Ring (LEIR). Since the present ECR lead-ion source...
Cooled beam diagnostics (1999)
The specific diagnostics systems used in cooler rings will be reviewed. The hardware used and the ways in which the physical characteristics of the beam are accessed will be described. It will be...
This report retraces the performances of LEAR during its life, the contribution to accelerator physics made at LEAR. It shows also the successful tests on ion accumulation that promises a new life of...
Bosser, Jacques, Carli, Christian, Chanel, M, Hill, C, Lombardi, A M, MacCaferri, R, ...
This report gives the results of a programme of experimental investigations, which were carried out to test stacking of lead ions in a storage ring (the former Low Energy Antiproton Ring, LEAR) at...
Electron cooling of PB$^{54+}$ ions in the low energy ion ring (LEIR) (1998)
Bosser, Jacques, Carli, Christian, Chanel, M, MacCaferri, R, Maury, S, Möhl, D, ...
For the preparation of dense bunches of lead ions for the LHC, electron cooling will be essential for accumula tion in a storage ring at 4.2 MeV/u. Tests have been carried out on the LEAR ring...
Results on lead ion accumulation in LEAR for the LHC (1998)
Bosser, Jacques, Broere, J, Carli, Christian, Chanel, M, Hill, C, MacCaferri, R, ...
In order to prepare dense bunches of lead ions for the LHC, it is foreseen to accumulate the 4.2 MeV/u linac beam in a storage ring using electron cooling. A series of experiments has been...
Recent Lead Ion Storage Tests on LEAR (1997)
Bosser, Jacques, Broere, J, Carli, Christian, Chanel, M, Hill, C, Ley, R, ...
The LEAR machine is foreseen to be used as a lead ion accumulator in the injector chain for the LHC. Therefore, to test the principle of Pb54+ ion accumulation in LEAR, at 4.2 MeV/u, a number of...
Baird, S A, Boillot, J, Caspers, Friedhelm, Chanel, M, Chohan, V, Eriksson, T, ...
This paper reviews the recent performance of the AAC and LEAR. Activities on the AAC include the successful exploitation of a magnetic horn as an antiproton collector lens and an energy-saving mode...
Longitudinal coupled-bunch instability around 1 GHZ at the CERN PS booster (1997)
Caspers, P, Chanel, M, Schönauer, Horst Otto, Søby, L, Dyachkov, M
The fast-growing "Ring 4" instability occurring at intensities above 6.5 1012 protons in the top one of the four rings of the CERN PS Booster (PSB) is finally explained by an asymmetry in the 40...
Recent Results on Lead-Ion Accumulation in LEAR for the LHC (1997)
Baird, S A, Bosser, Jacques, Broere, J, Carli, Christian, Chanel, M, Hill, C, ...
To prepare dense bunches of lead ions for the LHC it has been proposed to accumulate the 4.2 MeV/u linac beam in a storage ring with electron cooling. A series of experiments is being performed in...
A quadrupolar pick-up provides information on beam envelope oscillations. To enhance the signals we have used a quadrupolar kicker to excite these modes. In this way the incoherent Laslett tune shift...
An Antiproton Decelerator in the CERN PS Complex (1996)
Riunaud, J P, Autin, Bruno, Baird, S A, Boillot, J, Bosser, Jacques, Brouet, M, ...
The present CERN PS low-energy antiproton complex involves 4 machines to collect, cool, decelerate and supply experiments with up to 1010 antiprotons per pulse and per hour of momenta ranging from...
Radiation dose measurements around the CERN high-energy accelerators - PSB, PS, and SPS (1996)
Bossard, P, Chanel, M, Coninckx, F, Izycka, A, Nielsen, M, Schönbacher, Helmut, ...
The antiproton decelerator (AD), a simplified antiproton source (feasibility study) (1995)
Autin, Bruno, Baird, S A, Berlin, D, Boillot, J, Bosser, Jacques, Brouet, M, ...
In view of a possible future physics programme concerning antihydrogen a simplified scheme for the provision of antiprotons of a few MeV has been studied. It uses the present target area and the...
Baird, S A, Bosser, Jacques, Carli, Christian, Chanel, M, Lefèvre, P, Ley, R, ...
By measuring the lifetime of stored beams, the recombination of the ions with cooling electrons was investigated. Rates found are larger than expected for radiative electron capture and significantly...
Neutralisation of the LEAR electron-cooling beam: experimental results (1995)
Bosser, Jacques, Caspers, Friedhelm, Chanel, M, Ley, R, MacCaferri, R, Maury, S, ...
Production of MeV antiprotons (1994)
Baird, S A, Bosser, Jacques, Chanel, M, Lefèvre, P, Ley, R, Manglunki, Django, ...
Neutralisation and servo-system on the LEAR electron cooler (1994)
Bosser, Jacques, Caspers, Friedhelm, Chanel, M, Ley, R, Maury, S, MacCaferri, R, ...
Ultra-low momentum antiprotons in LEAR (1993)
Baird, S A, Bosser, Jacques, Chanel, M, Lefèvre, P, Ley, R, Manglunki, Django, ...
Electron beam cooling and beam instability studies at LEAR (1992)
Bosser, Jacques, Chanel, M, Ley, R, Möhl, D, Oeftiger, U, Tranquille, G
Performance update of LEAR (1992)
Asséo, E, Baird, S A, Bosser, Jacques, Chanel, M, Lefèvre, P, Ley, R, ...
Impedance measurements with strongly cooled beams at LEAR (1991)
Bosser, Jacques, Chanel, M, Manglunki, Django, Möhl, D, Pedersen, F, Tranquille, G, ...
Operational aspects of electron cooling at the low energy antiproton ring (LEAR) (1991)
Bosser, Jacques, Chanel, M, Ley, R, Möhl, D, Perrier, J, Tranquille, G, ...
Status of electron cooling experiments at LEAR (1990)
Bosser, Jacques, Chanel, M, Ley, R, Möhl, D, Ollenhauer, Fritz, Tranquille, G
Low energy antiprotons at the CERN PS (1990)
Asséo, E, Bouthéon, M, Cappi, R, Carron, G, Chanel, M, Dumollard, D, ...
Charge exchange injection and diagnostics with H- in LEAR (1990)
Asséo, E, Chanel, M, Lefèvre, P, Mazeline, C, Möhl, D, Molinari, G, ...
Performance update on LEAR (1990)
Allen, D, Asséo, E, Baird, S A, Bengtsson, J, Chanel, M, Chevallier, J, ...
Further results and evaluation of electron cooling experiments at LEAR (1990)
Poth, Helmut, Schwab, W, Seligmann, B, Wörtge, M, Wolf, A, Baird, S A, ...
Analysis of the orbit errors in the CERN accelerators using model simulation (1990)
Lee, M, Kleban, S D, Clearwater, S, Scandale, Walter, Pettersson, T S, Kugler, H, ...
First results of electron cooling experiments at LEAR (1990)
Poth, Helmut, Schwab, W, Seligmann, B, Wörtge, M, Wolf, A, Baird, S A, ...
Stochastic cooling and storage tests with oxygen ions in LEAR (1990)
Baird, S A, Bosser, Jacques, Chanel, M, Krämer, Dietrich, Hill, C, Ley, R, ...
Baribaud, Guy, Burla, P, Carter, C, Chanel, M, Donnat, J, Heymans, P P, ...
Radiation dose measurements around the CERN high-energy accelerators: PSB, PS, and SPS (1990)
Bossard, P, Chanel, M, Coninckx, F, Höfert, Manfred, Nielsen, M, Schönbacher, Helmut, ...
High-level dosimetry results for the CERN high-energy accelerators (1990)
Coninckx, F, Maier, P, Schönbacher, Helmut, Bossard, P, Chanel, M
Experimente zur Elektronenkuehlung am LEAR. (1989)
Poth, H., Schwab, W., Seligmann, B., Woertge, M., Wolf, A., Baird, S., ...
53.Physikertagung gemeinsam mit der Fruehjahrstagung DPG, Kern- und Hochenergie- physik, Energietechnik - Physikalische Grundlagen, Fachdidaktik der Physik, Gravitation und Relativitaetstheorie,...
Results from electron cooling experiments at LEAR. (1988)
Poth, H., Schwab, W., Seligmann, B., Woertge, M., Wolf, A., Haseroth, H., ...
Fruehjahrstagung DPG, Kern- und Mittelenergiephysik, Physikausstellung, Berlin, 21.-25.Maerz, 1988