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}
}
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