Electron cloud observations and cures in RHIC

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 gr...

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Bibliographic Details
Main Authors: 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.
Format: Conference Proceeding
Language:English
Subjects:
Acceleration
Clouds
Electron beams
Gold
Ion beams
Particle beams
Polarization
Protons
Solenoids
Stability
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Summary: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].
ISSN:1944-4680
2152-9582
DOI:10.1109/PAC.2007.4441092