High power klystrons
- Litton Systems, Inc., San Carlos, CA (United States). Electron Devices Division
Novel emerging applications in advanced linear collider accelerators, ionospheric and atmospheric sensing and modification and a wide spectrum of industrial processing applications, have resulted in microwave tube requirements which call for further development of high power klystrons in the range from S-band to X-band. In the present paper the authors review recent progress in high power klystron development and discuss some of the issues and scaling laws for successful design. In order to increase the power output of a klystron, it is necessary to increase the beam voltage, the beam current as well as the pulse length for the case of high energy per pulse. When the beam voltage is i increased then limitations set in via gun arcing, r-f gap arcing, cavity r-f power density, output r-f gap stressing and arcing and output window arcing and degradation. When the beam current is increased, beam space charge effects set in which limit the useful r-f gain on the beam and excite additional deleterious oscillations and noise amplification. When the pulse length is increased all the arcing problems and the space charge oscillation problems are enhanced because of the additional time available for these deleterious effects to set in and grow. More specifically, in the paper they shall discuss recent progress in electron guns with potential grading electrodes for high voltage with short and long pulse operation via computer simulations obtained from the code DEMEOS, as well as preliminary experimental results. They shall also present designs for high power beam collectors.
- OSTI ID:
- 51856
- Report Number(s):
- CONF-940142--; ISBN 0-8194-1449-2
- Country of Publication:
- United States
- Language:
- English
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