DocumentCode :
345416
Title :
Beam-gas lifetime in a low emittance, medium-energy storage ring
Author :
Chung, S.M. ; Park, C.D. ; Gu, S.H. ; Kwon, M.
Author_Institution :
Accel. Lab., Pohang Univ. of Sci. & Technol., South Korea
Volume :
2
fYear :
1999
fDate :
1999
Firstpage :
1357
Abstract :
In order to understand the beam-lifetime limiting process in a medium-energy machine like the 2 GeV Pohang Light Source, the beam-gas scattering effects have been measured by using He gas and the effects of the transverse aperture height on the lifetime have also been examined by using a beam scraper. It is found that for a medium to large gap vacuum chamber the lifetime is mainly limited by the Touschek effect at the machine operating pressure, low 10-9 Torr. For a very small gap undulator, however, the beam-gas scattering makes substantial contribution to the beam lifetime even at ~1×10-9 Torr because of Coulomb scattering
Keywords :
electron accelerators; particle beam stability; storage rings; 0.000000001 torr; 2 GeV; Coulomb scattering; He; He gas; PLS; Pohang Light Source; Touschek effect; beam lifetime; beam scraper; beam-gas lifetime; beam-gas scattering; low emittance; storage ring; transverse aperture height; Electron beams; Helium; Laboratories; Light scattering; Light sources; Particle beams; Storage rings; Synchrotron radiation; Undulators; Vacuum systems;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
Type :
conf
DOI :
10.1109/PAC.1999.795547
Filename :
795547
Link To Document :
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