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Title: Suppression of Beam-Ion Instability in Electron Rings with Multi-Bunch Train Beam Fillings

Abstract

The ion-caused beam instability in the future light sources and electron damping rings can be serious due to the high beam current and ultra-small emittance of picometer level. One simple and effective mitigation of the instability is a multi-bunch train beam filling pattern which can significantly reduce the ion density near the beam, and therefore reduce the instability growth rate up to two orders of magnitude. The suppression is more effective for high intensity beams with low emittance. The distribution and the field of trapped ions are benchmarked to validate the model used in the paper. The wake field of ion-cloud and the beam-ion instability is investigated both analytically and numerically. We derived a simple formula for the build-up of ion-cloud and instability growth rate with the multi-bunch-train filling pattern. The ion instabilities in ILC damping ring, SuperKEKB and SPEAR3 are used to compare with our analyses. The analyses in this paper agree well with simulations.

Authors:
; ; ;
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1022509
Report Number(s):
SLAC-PUB-14387
Journal ID: ISSN 1098--4402; TRN: US201118%%217
DOE Contract Number:  
AC02-76SF00515
Resource Type:
Journal Article
Journal Name:
Phys.Rev.ST Accel.Beams 14:084401,2011
Additional Journal Information:
Journal Volume: 14; Journal Issue: 8; Journal ID: ISSN 1098--4402
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BEAM CURRENTS; DAMPING; DISTRIBUTION; ELECTRON RINGS; ELECTRONS; INSTABILITY; INSTABILITY GROWTH RATES; ION DENSITY; LIGHT SOURCES; MITIGATION; Accelerators,ACCPHY

Citation Formats

Wang, L, Cai, Y, Raubenheimer, T O, /SLAC, Fukuma, H, and /KEK, Tsukuba. Suppression of Beam-Ion Instability in Electron Rings with Multi-Bunch Train Beam Fillings. United States: N. p., 2011. Web. doi:10.1103/PhysRevSTAB.14.084401.
Wang, L, Cai, Y, Raubenheimer, T O, /SLAC, Fukuma, H, & /KEK, Tsukuba. Suppression of Beam-Ion Instability in Electron Rings with Multi-Bunch Train Beam Fillings. United States. https://doi.org/10.1103/PhysRevSTAB.14.084401
Wang, L, Cai, Y, Raubenheimer, T O, /SLAC, Fukuma, H, and /KEK, Tsukuba. 2011. "Suppression of Beam-Ion Instability in Electron Rings with Multi-Bunch Train Beam Fillings". United States. https://doi.org/10.1103/PhysRevSTAB.14.084401. https://www.osti.gov/servlets/purl/1022509.
@article{osti_1022509,
title = {Suppression of Beam-Ion Instability in Electron Rings with Multi-Bunch Train Beam Fillings},
author = {Wang, L and Cai, Y and Raubenheimer, T O and /SLAC and Fukuma, H and /KEK, Tsukuba},
abstractNote = {The ion-caused beam instability in the future light sources and electron damping rings can be serious due to the high beam current and ultra-small emittance of picometer level. One simple and effective mitigation of the instability is a multi-bunch train beam filling pattern which can significantly reduce the ion density near the beam, and therefore reduce the instability growth rate up to two orders of magnitude. The suppression is more effective for high intensity beams with low emittance. The distribution and the field of trapped ions are benchmarked to validate the model used in the paper. The wake field of ion-cloud and the beam-ion instability is investigated both analytically and numerically. We derived a simple formula for the build-up of ion-cloud and instability growth rate with the multi-bunch-train filling pattern. The ion instabilities in ILC damping ring, SuperKEKB and SPEAR3 are used to compare with our analyses. The analyses in this paper agree well with simulations.},
doi = {10.1103/PhysRevSTAB.14.084401},
url = {https://www.osti.gov/biblio/1022509}, journal = {Phys.Rev.ST Accel.Beams 14:084401,2011},
issn = {1098--4402},
number = 8,
volume = 14,
place = {United States},
year = {Thu Aug 18 00:00:00 EDT 2011},
month = {Thu Aug 18 00:00:00 EDT 2011}
}