DocumentCode :
2898245
Title :
Electron cloud observations and cures in RHIC
Author :
Fischer, W. ; Blaskiewicz, M. ; Brennan, M. ; Huang, H. ; Hseuh, H.C. ; Ptitsyn, V. ; Roser, T. ; Thieberger, P. ; Trbojevic, D. ; Wei, J. ; Zhang, S.Y. ; Iriso, U.
Author_Institution :
BNL, Upton
fYear :
2007
fDate :
25-29 June 2007
Firstpage :
759
Lastpage :
763
Abstract :
Since 2001 RHIC has experienced electron cloud effects, which have limited the beam intensity. These include dynamic pressure rises - including pressure instabilities, tune shifts, a reduction of the stability threshold for bunches crossing the transition energy, and possibly incoherent emittance growth. We summarize the main observations in operation and dedicated experiments, as well as countermeasures including baking, NEG coated warm beam pipes, solenoids, bunch patterns, anti-grazing rings, pre-pumped cold beam pipes, scrubbing, and operation with long bunches. This article is a short version of [1].
Keywords :
beam handling equipment; ion accelerators; particle beam bunching; particle beam diagnostics; particle beam dynamics; particle beam stability; solenoids; synchrotrons; NEG coated warm beam pipes; RHIC; antigrazing rings; beam intensity; bunch crossing; bunch patterns; electron cloud effects; incoherent emittance growth; prepumped cold beam pipes; pressure instabilities; solenoids; transition energy; tune shifts; Acceleration; Clouds; Electron beams; Gold; Ion beams; Particle beams; Polarization; Protons; Solenoids; Stability;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
Type :
conf
DOI :
10.1109/PAC.2007.4441092
Filename :
4441092
Link To Document :
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