Test results of distributed ion pump designs for the PEP-II Asymmetric B-Factory collider
Conference
·
OSTI ID:10173677
- Lawrence Livermore National Lab., CA (United States); and others
The testing facility measurement methods and results of prototype distributed ion pump (DIP) designs for the PEP-II B-Factory High Energy Ring are presented. Two basic designs with 5- or 7-anode plates were tested at LLNL with penning cell sizes of 15, 18, and 21 mm. Direct comparison of 5- and 7-plate anodes with 18 mm holes shows increased pumping speed with the 7-plate design. The 5-plate, 18 mm and 7-plate, 15 mm designs both gave an average pumping speed of 135 1/s/m at 1 {times} 10{sup {minus}8} Torr nitrogen base pressure in a varying 0.18 T peak B-field. Comparison of the three hole sizes indicates that cells smaller than the 15 mm tested can be efficiently used to obtain higher pumping speeds for the same anode plate sizes used.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States); Stanford Linear Accelerator Center, Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48; AC03-76SF00515
- OSTI ID:
- 10173677
- Report Number(s):
- UCRL-JC--117705; CONF-940618--35; ON: DE94016603
- Country of Publication:
- United States
- Language:
- English
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