DocumentCode
377589
Title
Reduction of the photoelectron yield from a copper beam chamber by saw-tooth machining
Author
Suetsugu, Y. ; Tanimoto, Y. ; Hori, Y. ; Kanazawa, K. ; Kobayashi, M. ; Hsu, Y.J.
Author_Institution
KEK, Tsukuba, Japan
Volume
3
fYear
2001
fDate
2001
Firstpage
2177
Abstract
One of the latest serious problems for KEKB is a beam size blow up of the positron beam. The blow up is considered to be caused by a single-beam instability due to an electron cloud around the positron beam. The seed of the electrons is mainly photoelectrons emitted from the surface of vacuum chamber. Here a surface with a sawtooth structure is proposed to reduce the photoelectron yield. Experiments using a test chamber made of copper verify its validity
Keywords
X-ray photoelectron spectra; copper; electron accelerators; particle beam stability; storage rings; vacuum apparatus; Cu; KEKB; beam chamber; beam size blow up; electron cloud; electron storage ring; photoelectron yield reduction; positron beam; sawtooth machining; single-beam instability; test chamber; vacuum chamber; Clouds; Copper; Electrodes; Electron beams; Electron emission; Machining; Positrons; Strontium; Teeth; Testing;
fLanguage
English
Publisher
ieee
Conference_Titel
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location
Chicago, IL
Print_ISBN
0-7803-7191-7
Type
conf
DOI
10.1109/PAC.2001.987315
Filename
987315
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