Secondary Electron Yield Measurements and Groove Chambers Tests in the PEP-II Beam Line Straights Sections

Conference · Thu Jul 03 04:00:00 EDT 2008 · Conf.Proc.C0806233:mopp064,2008

OSTI ID:934749

Pivi, M T.F.; King, F; Kirby, R E; Markiewicz, T; Raubenheimer, T O; Seeman, J; Wang, L

Beam instability caused by the electron cloud has been observed in positron and proton storage rings and it is expected to be a limiting factor in the performance of the positron Damping Ring (DR) of future Linear Colliders such as ILC and CLIC [1, 2]. In the Positron Low Energy Ring (LER) of the PEP-II accelerator, we have installed vacuum chambers with rectangular grooves in a straight magnetic-free section to test this promising possible electron cloud mitigation technique. We have also installed a special chamber to monitor the secondary electron yield of TiN and TiZrV (NEG) coating, Copper, Stainless Steel and Aluminum under the effect of electron and photon conditioning in situ in the beam line. In this paper, we describe the ongoing R&D effort to mitigate the electron cloud effect for the ILC damping ring, the latest results on in situ secondary electron yield conditioning and recent update on the groove tests in PEP-II.

• Research Organization: SLAC National Accelerator Laboratory (SLAC)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 934749
• Report Number(s): SLAC-PUB-13284
• Conference Information: Journal Name: Conf.Proc.C0806233:mopp064,2008
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
43 PARTICLE ACCELERATORS
ALUMINIUM
Accelerators
ACCPHY
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ASTRO
BIO
CHEM
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EARTH
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HEPEX
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OPTICS
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CLOUDS
COPPER
DAMPING
ELECTRONS
INSTABILITY
LINEAR COLLIDERS
MITIGATION
MONITORS
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STAINLESS STEELS
STORAGE RINGS