Present status of KEKB vacuum system.
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Accession number;99A1045388
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| Title;Present status of KEKB vacuum system. |
| Author;
KANAZAWA K
(High Energy Accelerator Res. Organization(kek), Ibaraki, Jpn)
KATO S
(High Energy Accelerator Res. Organization(kek), Ibaraki, Jpn)
SUETSUGU Y
(High Energy Accelerator Res. Organization(kek), Ibaraki, Jpn)
HISAMATSU H
(High Energy Accelerator Res. Organization(kek), Ibaraki, Jpn)
SATO M
(High Energy Accelerator Res. Organization(kek), Ibaraki, Jpn)
SHIMAMOTO M
(High Energy Accelerator Res. Organization(kek), Ibaraki, Jpn)
SHIRAI M
(High Energy Accelerator Res. Organization(kek), Ibaraki, Jpn)
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Journal Title;Proc Symp Accel Sci Technol
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Journal Code:F0512B
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ISSN:0914-2789
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VOL.12th;NO.;PAGE.66-68(1999)
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| Figure&Table&Reference;FIG.3, TBL.1, REF.9 |
| Pub. Country;Japan |
| Language;English |
| Abstract;The commissioning of KEKB(KEK B-factory) started in December, 1998. The vacuum system is working almost satisfactorily although several vacuum troubles occurred around the collision point. The photon stimulated gas desorption coefficient of copper beam chamber is decreasing steadily and reached to about 1*10-5 molecules photon-1 just before the summer shutdown, where the integrated linear photon flux is close to 1024 photons m-1. No excess heating was observed for bellows and gate valves up to the beam current more than 500mA. (author abst.) |
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