Simulation of e-cloud driven instability and its attenuation using a simulated feedback system in the CERN SPS

Journal Article · Mon Dec 13 04:00:00 EST 2010 · Physical Review STAB

OSTI ID:1006402

Vay, J -L; Furman, M A

Electron clouds have been shown to trigger fast growing instabilities on proton beams circulating in the SPS, and a feedback system to control the single-bunch instabilities is under active development. We present the latest improvements to the WARP-POSINST simulation framework and feedback model, and its application to the self-consistent simulations of two consecutive bunches interacting with an electron cloud in the SPS. Simulations using an idealized feedback system exhibit adequate mitigation of the instability providing that the cutoff of the feedback bandwidth is at or above 450 MHz. Artifacts from numerical noise of the injected distribution of electrons in the modeling of portions of bunch trains are discussed, and benchmarking of WARP against POSINST and HEADTAIL are presented.

• Research Organization: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
• Sponsoring Organization: Accelerator& Fusion Research Division
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 1006402
• Report Number(s): LBNL-3122E-JArt
• Journal Information: Physical Review STAB, Journal Name: Physical Review STAB; ISSN 1098-4402
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ATTENUATION
CERN
CLOUDS
DISTRIBUTION
ELECTRONS
FEEDBACK
INSTABILITY
MITIGATION
PROTON BEAMS
SIMULATION