High-power operation of accelerator structures at liquid nitrogen temperature
The microwave properties of two S-band resonant structures were measured under pulsed high-power operation at liquid nitrogen temperature. One was a simple cylindrical pillbox cavity operating in the TM010 mode, and the other was a high surface gradient side-coupled standing-wave structure. Both were machined from OFHC copper. At low power levels, the Q of both structures measured at liquid nitrogen temperature (-197C) increased by the same factor over that at 20C. When measured at high power levels, the enhancement factor was much lower. The low-temperature Q was found to be a function of the peak power of the RF pulse, rather than the average power level. The test method is described, and results of the tests and theoretical studies are presented.
- Research Organization:
- Varian Associates, Palo Alto, CA
- OSTI ID:
- 6190755
- Report Number(s):
- CONF-850504-; TRN: 86-004217
- Journal Information:
- IEEE Trans. Nucl. Sci.; (United States), Vol. NS-32:5; Conference: Particle accelerator conference, Vancouver, Canada, 13 May 1985
- Country of Publication:
- United States
- Language:
- English
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