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Title: Fast ion instability at the Cornell Electron Storage Ring Test Accelerator

Journal Article · · Physical Review Special Topics. Accelerators and Beams
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Fast ion instability can lead to deterioration of an electron beam (increasing emittance and instability of a train of bunches) in storage rings and linacs. We study this at the Cornell electron storage ring test accelerator using a 2.1 GeV low emittance beam. As the source of ions is residual gas, our measurements are conducted at various pressures, including nominal vacuum as well as injected gas (Ar, Kr). We experiment with mitigation techniques, including changing the bunch pattern to have mini-trains instead of one long train, as well as increasing the initial vertical emittance of the beam. We also check to ensure that ion-trapping is not a substantial effect in our measurements. We measure turn-by-turn vertical bunch size and position, as well as the multibunch power spectrum. Our measurements confirm fast ion instability under all vacuum conditions. In conclusion, a detailed simulation is then used to compare theory with observations.

Research Organization:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
PHY-0734867; PHY-1002467; PHYS-1068662; FC02-08ER41538; SC0006505
OSTI ID:
1198618
Alternate ID(s):
OSTI ID: 1454514
Journal Information:
Physical Review Special Topics. Accelerators and Beams, Journal Name: Physical Review Special Topics. Accelerators and Beams Vol. 18 Journal Issue: 6; ISSN 1098-4402
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

References (8)

First Observations of a “Fast Beam-Ion Instability” journal July 1997
Experimental results on the fast beam-ion instability journal May 1998
Direct Observation of the Fast Beam-Ion Instability journal November 1998
Beam ion instability: Measurement, analysis, and simulation journal October 2013
Investigation of fast ion instability in SSRF
  • Jiang, Bocheng; Xia, Guoxing; Han, Lifeng
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 614, Issue 3 https://doi.org/10.1016/j.nima.2010.01.008
journal March 2010
Vertical beam size measurement in the CESR-TA storage ring using x-rays from synchrotron radiation
  • Alexander, J. P.; Chatterjee, A.; Conolly, C.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 748 https://doi.org/10.1016/j.nima.2014.02.040
journal June 2014
Simulations on the Fast-Ion Instability in the International Linear Collider Damping Rings journal August 2009
Fast beam-ion instability. I. Linear theory and simulations journal November 1995

Figures / Tables (14)

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Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS