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Title: MEASUREMENT OF HIGH Q RF CAVITY IMPEDANCE WITH BEAM

Abstract

An inexpensive method to measure, with beam, the Rs and Q of narrow-band high order resonances in RF cavities was developed on SPEAR. The two main results of this study are: (1) an improved operational stability of SPEAR; and (2) the decision to keep the present cavities for the proposed SPEAR upgrade. SPEAR3 will be run initially at 200 mA, twice the present current. Just beyond the current threshold, and before step loss, there is a regime in which the beam performs large amplitude, low frequency oscillations. Detailed measurements were performed to characterize the frequency, amplitude, growth and damping time of these relaxation oscillations.

Authors:
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (US)
OSTI Identifier:
813051
Report Number(s):
SLAC-PUB-9747
TRN: US0303621
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 May 2003
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; CAVITIES; DAMPING; IMPEDANCE; OSCILLATIONS; RELAXATION; SPEAR; STABILITY

Citation Formats

Limborg, Cecile. MEASUREMENT OF HIGH Q RF CAVITY IMPEDANCE WITH BEAM. United States: N. p., 2003. Web. doi:10.2172/813051.
Limborg, Cecile. MEASUREMENT OF HIGH Q RF CAVITY IMPEDANCE WITH BEAM. United States. https://doi.org/10.2172/813051
Limborg, Cecile. 2003. "MEASUREMENT OF HIGH Q RF CAVITY IMPEDANCE WITH BEAM". United States. https://doi.org/10.2172/813051. https://www.osti.gov/servlets/purl/813051.
@article{osti_813051,
title = {MEASUREMENT OF HIGH Q RF CAVITY IMPEDANCE WITH BEAM},
author = {Limborg, Cecile},
abstractNote = {An inexpensive method to measure, with beam, the Rs and Q of narrow-band high order resonances in RF cavities was developed on SPEAR. The two main results of this study are: (1) an improved operational stability of SPEAR; and (2) the decision to keep the present cavities for the proposed SPEAR upgrade. SPEAR3 will be run initially at 200 mA, twice the present current. Just beyond the current threshold, and before step loss, there is a regime in which the beam performs large amplitude, low frequency oscillations. Detailed measurements were performed to characterize the frequency, amplitude, growth and damping time of these relaxation oscillations.},
doi = {10.2172/813051},
url = {https://www.osti.gov/biblio/813051}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu May 01 00:00:00 EDT 2003},
month = {Thu May 01 00:00:00 EDT 2003}
}