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Title: VHF Injector Pumping Slot RF Shielding Effectiveness

Abstract

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.

Authors:
 [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
OSTI Identifier:
1235577
Report Number(s):
LBNL-1003796
ir:1003796; TRN: US1600256
Resource Type:
Technical Report
Resource Relation:
Related Information: CBP Tech. Note 379
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; RADIOWAVE RADIATION; MHZ RANGE; DEPTH; PERFORMANCE; SHIELDING; COMPARATIVE EVALUATIONS; ATTENUATION; CAVITY RESONATORS; SPUTTER-ION PUMPS; CONFIGURATION; LINEAR ACCELERATORS; ELECTRON SOURCES; ELECTRON GUNS

Citation Formats

Staples, John. VHF Injector Pumping Slot RF Shielding Effectiveness. United States: N. p., 2007. Web. doi:10.2172/1235577.
Staples, John. VHF Injector Pumping Slot RF Shielding Effectiveness. United States. https://doi.org/10.2172/1235577
Staples, John. 2007. "VHF Injector Pumping Slot RF Shielding Effectiveness". United States. https://doi.org/10.2172/1235577. https://www.osti.gov/servlets/purl/1235577.
@article{osti_1235577,
title = {VHF Injector Pumping Slot RF Shielding Effectiveness},
author = {Staples, John},
abstractNote = {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.},
doi = {10.2172/1235577},
url = {https://www.osti.gov/biblio/1235577}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Aug 08 00:00:00 EDT 2007},
month = {Wed Aug 08 00:00:00 EDT 2007}
}