First Beam Commissioning of the 400 MHz LHC RF System (2009)
Butterworth, A C, Angoletta, M E, Arnaudon, L, Baudrenghien, P, Bohl, T, Brunner, O, ...
Hardware commissioning of the LHC RF system was successfully completed in time for first beams in LHC in September 2008. All cavities ware conditioned to nominal field, power systems tested and all...
Hardware and Initial Beam Commissioning of the LHC RF Systems (2009)
Linnecar, T, Angoletta, M E, Arnaudon, L, Baudrenghien, P, Bohl, T, Brunner, O, ...
Hardware commissioning of the LHC RF Systems, the ACS Superconducting RF systems, ADT Transverse Dampers and APWL Wideband Longitudinal Monitors, started in late 2007 and was completed in time for...
LHC Transverse Feedback System: First Results of Commissionning (2008)
Zhabitsky, V M, Gorbachev, E V, Lebedev, N I, Makarov, A A, Pilyar, N V, Rabtsun, S V, ...
A powerful transverse feedback system ("Damper") has been installed in LHC. It will stabilise the high intensity beam against coupled bunch transverse instabilities in a frequency range from 3 kHz to...
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...
Commissioning of the 400 MHz LHC RF System (2008)
Ciapala, Edmond, Arnaudon, L, Baudrenghien, P, Brunner, O, Butterworth, A, Linnecar, T, ...
The installation of the 400 MHz superconducting RF system in LHC is finished and commissioning is under way. The final RF system comprises four cryo-modules each with four cavities in the LHC tunnel...
LHC Transverse Feedback System and its Hardware Commissioning (2008)
Baudrenghien, P, Gorbachev, E V, Höfle, Wolfgang, Killing, F, Kojevnikov, I, Kotzian, G, ...
A powerful transverse feedback system ("Damper") has been installed in LHC. It will stabilise coupled bunch instabilities in a frequency range from 3 kHz to 20 MHz and at the same time damp injection...
Digital Signal Processing for the Multi-Bunch LHC Transverse Feedback System (2008)
Baudrenghien, P, Höfle, Wolfgang, Kotzian, G, Rossi, V
For the LHC a VME card has been developed that contains all functionalities for transverse damping, diagnostics and controlled bunch by bunch excitation. It receives the normalized bunch by bunch...
Linac4 Technical Design Report (2006)
Arnaudon, L, Baudrenghien, P, Baylac, M, Bellodi, G, Body, Y, Borburgh, J, ...
Linac4 is an H- linear accelerator, intended to replace Linac2 as injector to the PS Booster (PSB). By delivering to the PSB a beam at 160 MeV energy, Linac4 will provide the conditions to double the...
Digital Design Of The LHC Low Level rf: The Tuning System For The Superconducting Cavities (2006)
Baudrenghien, P, Butterworth, A, Ciapala, Edmond, Molendijk, J C, Olsen, R, Sorokoletov, R, ...
The low level RF systems for the LHC are based extensively on digital technology, not only to achieve the required performance and stability but also to provide full remote control and diagnostics...
The high intensity regime is reached when the voltage induced by the beam in the RF cavities is of an amplitude comparable to the desired accelerating voltage. In steady state this beam loading can...
Nominal longitudinal parameters for the LHC beam in the CERN SPS (2003)
Baudrenghien, P, Bohl, T, Linnecar, Trevor Paul R, Shaposhnikova, Elena, Tückmantel, Joachim
A proton beam with the basic structure defined by the the LHC requirements, was first available for injection into the SPS in 1998. At the end of 2002, following a significant beam-studies and RF...
The LHC Proton Beam in the CERN SPS: an Update (2003)
Arduini, Gianluigi, Baudrenghien, P, Bohl, T, Collier, Paul, Cornelis, K, Höfle, Wolfgang, ...
During the 2001 run the beam-induced electron-cloud, generating dramatic vacuum pressure increases and fast transverse instabilities, was the main limitation in the achievement of the nominal LHC...
Status of the LHC proton beam in the CERN SPS (2002)
Arduini, Gianluigi, Baudrenghien, P, Bohl, T, Collier, Paul, Cornelis, Karel, Höfle, Wolfgang, ...
During the 2000-2001 shutdown the SPS has undergone a major hardware upgrade to cope with its role of LHC injector. An impedance reduction campaign, improvements to the RF beam-control systems, and...
SPS Beams for LHC: RF Beam Control to Minimize Rephasing in the SPS (1998)
Baudrenghien, P, Linnecar, Trevor Paul R, Stellfeld, D, Wehrle, U
After acceleration to 450 GeV/c in the SPS, the proton beams for the LHC must be rephased in order to be injected into the correct place in the collider. If the position before rephasing is random,...
The New RF Control System for the CERN SPS Accelerator (1996)
Baudrenghien, P, Bracke, E, Linnecar, Trevor Paul R, Marty, H, Molendijk, J C, Pilchen, Y, ...
The old SPS RF control system designed in 1972 has been replaced completely, i.e. both hardware and software. The new system has to control both RF equipment conceived during the last 23 years and...
Double batch injection into LEP (1996)
Baudrenghien, P, Collier, Paul
LEP is now routinely filled from two elementary injector cycles, one positron and one electron. During each of these cycles, 8 bunches are accelerated in the PS accelerator, then the SPS and then...