VHF Injector Pumping Slot RF Shielding Effectiveness
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
The effectiveness of the shielding of the pumping slots is calculated for two radial depths of the slots with Mafia-2 and compared to a simple recipe that calculates the RF attenuation in a slot. CBP Technical Note 378 describes the pumping configuration of the 100 MHz VHF photoinjector. The cavity is surrounded by 36 slots, 4.9 cm wide, separated by bars, also 4.9 cm wide. The radial depth of the bars controls the attenuation of the RF from the cavity proper to the annular plenum outside the bars where the getter pumps are located. This note describes calculations of the level of RF fields in the plenum for two different values of the radial depth of the bars and two different values of the spacing between the outer dimension of the bars and the outer plenum wall.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI ID:
- 1235577
- Report Number(s):
- LBNL-1003796; ir:1003796; TRN: US1600256
- Resource Relation:
- Related Information: CBP Tech. Note 379
- Country of Publication:
- United States
- Language:
- English
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