| Article | |
| Report number | CERN-SL-2002-054-OP |
| Title | Status of the LHC proton beam in the CERN SPS |
| Author(s) | Arduini, Gianluigi ; Baudrenghien, P ; Bohl, T (CERN) ; Collier, Paul ; Cornelis, Karel ; Höfle, Wolfgang ; Linnecar, Trevor Paul R ; Shaposhnikova, Elena ; Tückmantel, Joachim ; Wenninger, J |
| Affiliation | (CERN) |
| Corporate Author(s) | CERN. Geneva. SL (SPS+LHC) Division |
| Publication | 2002 |
| Imprint | 14 Jun 2002 |
| Number of pages | 3 |
| Series | (High Energy Circular Accelerators and Colliders) (Report) |
| In: | 8th European Particle Accelerator Conference, Paris, France, 3 - 7 Jun 2002, pp.206 |
| Subject category | Accelerators and Storage Rings |
| Accelerator/Facility, Experiment | CERN LHC |
| Free keywords | brilliance ; beam-loading ; collective-effects ; emittance ; ion-effects |
| Abstract | 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 modifications to the injection kicker magnets and transverse feedback were the main items of this upgrade. By the end of the 2001 run, after a series of machine development sessions, a single LHC batch with half the nominal intensity could be accelerated from 26 to 450 GeV/c, the LHC injection energy, with nominal longitudinal and transverse parameters. At present the major known obstacle to the achievement of the nominal LHC beam with four batches is the beam-induced electron cloud. This generates both dramatic vacuum pressure increases and fast single and coupled bunch transverse instabilities. The problems encountered with this high brilliance beam and solutions developed so far are presented. Possible cures for the existing limitations are outlined. |
| Copyright/License | publication: (License: CC-BY) |
Corresponding record in: Inspire
Email contact: Martine.Truchet@cern.ch
Record created 2002-11-26, last modified 2024-09-18
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