Numerical simulation of high power R. F. sources

Conference · Mon Aug 01 04:00:00 EDT 1983 · IEEE Trans. Nucl. Sci.; (United States)

OSTI ID:5362764

Drobot, A T; Hanerfeld, H; Herrmannsfeldt, W B; Ko, K; Seftor, L

In high power microwave tubes the efficient conversion of kinetic electron beam energy to R.F. in a narrow frequency band involves complicated nonlinear electron dynamics and may involve the spontaneous generation of waves at other frequencies. This paper describes the adaptation of an electromagnetic 2D-3V particle-in-cell code MASK to the simulation of such high power R.F. sources. In situations where the R.F. interaction results in the reflection of beam particles, or where there is the excitation of multiple models internal to the microwave device, simulations are a new tool that permit a representation of the physical processes. In addition, they are capable of modeling the transient behavior and not just steady state operation. One of the applications of MASK at SLAC is to aid in the design of a new 150 MW Klystron at 2.85 GHz. This work is currently in progress and the approach to it is outlined. Preliminary results have been obtained for a model two cavity problem and are presented. These results illustrate the complicated dynamics in the nonlinear regime including the presence of reflected particles and harmonic generation. The code has also been run in the linear regime where good agreement has been found with small signal theory.

• Research Organization: Science Applications, Inc., 1710 Goodridge Dr., McLean, Virginia 22102
• OSTI ID: 5362764
• Report Number(s): CONF-830311-
• Conference Information: Journal Name: IEEE Trans. Nucl. Sci.; (United States) Journal Volume: NS-30:4
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430100* -- Particle Accelerators-- Design
Development
& Operation
BEAMS
COMPUTER CODES
COMPUTERIZED SIMULATION
CONVERSION
ELECTRON BEAMS
ELECTRON TUBES
ELECTRONIC EQUIPMENT
ENERGY CONVERSION
EQUIPMENT
KLYSTRONS
LEPTON BEAMS
M CODES
MICROWAVE EQUIPMENT
MICROWAVE TUBES
NATIONAL ORGANIZATIONS
PARTICLE BEAMS
RF SYSTEMS
SIMULATION
STANFORD LINEAR ACCELERATOR CENTER
US DOE
US ERDA
US ORGANIZATIONS