Published March 13, 2006
| Version v1
Report
The PEP-II Lower Pressure HER Vacuum Chamber
Description
This new vacuum chamber has been installed from 12 to 21 meters upstream of the BaBar detector in the PEP-II High Energy Ring (HER) to reduce lost particle backgrounds. The backgrounds from HER now dominate the backgrounds in the BaBar detector and the present vacuum pressure is 1 x 10-9 Torr. The new chamber will increase the pumping significantly by adding 18 x 2000 l/s titanium sublimation pumps to the existing 5 x 440 l/s ion pumps, and is expected to reduce the pressure by about a factor of five. Features of the chamber include improved water cooling, improved vacuum conductance through copper RF screens featuring over 15,000 small square holes and the ability to sublimate titanium while the beam is still on
Availability note (English)
Available from http://www.slac.stanford.edu/cgi-wrap/pubpage?slac-pub-11751.html; OSTI as DE00877437; PURL: https://www.osti.gov/servlets/purl/877437-mIGE2d/Additional details
Identifiers
Publishing Information
- Imprint Pagination
- 3 p.
- Report number
- SLAC-PUB--11751
Conference
- Title
- 18. International Conference on High-Energy Accelerators (HEACC 2001)
- Dates
- 26-30 Mar 2001
- Place
- Tsukuba (Japan)
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 37066627
- Subject category
- S43: PARTICLE ACCELERATORS;
- Resource subtype / Literary indicator
- Conference, Non-conventional Literature
- Descriptors DEI
- ACCELERATORS; BEAMS; COPPER; PRESSURE CONTROL; PRESSURE RANGE NANO PA; RADIATION DETECTORS; TITANIUM; VACUUM PUMPS
- Descriptors DEC
- CONTROL; ELEMENTS; EQUIPMENT; LABORATORY EQUIPMENT; MEASURING INSTRUMENTS; METALS; PRESSURE RANGE; PUMPS; TRANSITION ELEMENTS
Optional Information
- Contract/Grant/Project number
- AC02-76SF00515
- Funding organization
- US Department of Energy (United States)