Two and one-half dimension particle-in-cell simulation of high-power klystrons
A technique for modeling high-power klystrons with the fully electromagnetic particle-in-cell code MASK is reported. The interesting operating parameters (efficiency, gain, etc.) are associated with a highly resonant steady state. To reach steady state within a reasonable computing time, it is necessary to reduce the time needed for the transient filling of resonant structures. The technique introduced replaces resonant cavities with rf voltages across corresponding ''ports'' in the beam tube. The voltage and phase of each port can be rigorously determined from power balance between work done on the beam, wall losses, and any external input or output. Given a set of cavity parameters ( 0, R/Q, Q0), power balance gives implicit relations for the voltage and phase. As an example, we show a simulation of the 5-cavity 35 MW SLAC klystron in which the computed efficiency is in good agreement with the experiment.
- Research Organization:
- Stanford Linear Accelerator Center
- OSTI ID:
- 6297759
- Report Number(s):
- CONF-850504-; TRN: 86-004370
- 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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Related Subjects
KLYSTRONS
COMPUTERIZED SIMULATION
CAVITY RESONATORS
COMPUTER CODES
EFFICIENCY
ELECTRIC POTENTIAL
GAIN
M CODES
POWER AMPLIFIERS
POWER RANGE 10-100 MW
RF SYSTEMS
STANFORD LINEAR ACCELERATOR CENTER
STEADY-STATE CONDITIONS
AMPLIFICATION
AMPLIFIERS
ELECTRON TUBES
ELECTRONIC EQUIPMENT
EQUIPMENT
MICROWAVE EQUIPMENT
MICROWAVE TUBES
NATIONAL ORGANIZATIONS
RESONATORS
SIMULATION
US DOE
US ERDA
US ORGANIZATIONS
430303* - Particle Accelerators- Experimental Facilities & Equipment