DocumentCode :
846478
Title :
Bench Measurements of the Loss Impedance for PEP Beam Line Components
Author :
Weaver, J.N. ; Wilson, P.B. ; Styles, J.B.
Volume :
26
Issue :
3
fYear :
1979
fDate :
6/1/1979 12:00:00 AM
Firstpage :
3971
Lastpage :
3973
Abstract :
Bench measurements of the parasitic model loss parameter k, due to the interaction of a bunched beam with discontinuities in the vacuum pipe, are presented for many of the PEP beamline components. The measurements were made using the pulsed, coaxial transmission method of Sands and Rees. Full-scale machined and sheet metal models containing tapers, gaps, tanks (cavities), collimators, plates, electrodes and other irregular shapes were investigated. Accuracies, errors and modeling difficulties are pointed out. Loss curves and rules of thumb are discussed that should aid in the design of similar components. Also described is a moderately successful effort to de-Q some of the resonances in a particularly complicated chamber (separating plates) with a strip line coupling loop that is externally terminated at both ends.
Keywords :
Coaxial components; Collimators; Electrodes; Impedance measurement; Loss measurement; Pulse measurements; Resonance; Shape; Thumb; Transmission line discontinuities;
fLanguage :
English
Journal_Title :
Nuclear Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9499
Type :
jour
DOI :
10.1109/TNS.1979.4330667
Filename :
4330667
Link To Document :
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