Modelling RF sources using 2-D PIC codes [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 1993.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: Pages: (10 pages) : digital, PDF file
Additional Creators:: Stanford Linear Accelerator Center, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

In recent years, many types of RF sources have been successfully modelled using 2-D PIC codes. Both cross field devices (magnetrons, cross field amplifiers, etc.) and pencil beam devices (klystrons, gyrotrons, TWT'S, lasertrons, etc.) have been simulated. All these devices involve the interaction of an electron beam with an RF circuit. For many applications, the RF structure may be approximated by an equivalent circuit, which appears in the simulation as a boundary condition on the electric field ( port approximation''). The drive term for the circuit is calculated from the energy transfer between beam and field in the drift space. For some applications it may be necessary to model the actual geometry of the structure, although this is more expensive. One problem not entirely solved is how to accurately model in 2-D the coupling to an external waveguide. Frequently this is approximated by a radial transmission line, but this sometimes yields incorrect results. We also discuss issues in modelling the cathode and injecting the beam into the PIC simulation.

Report Numbers:

E 1.99:slac-pub-6067
E 1.99: conf-930269--10
conf-930269--10
slac-pub-6067

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Note:

Published through SciTech Connect.
03/01/1993.
"slac-pub-6067"
" conf-930269--10"
"DE93010954"
Computational accelerator physics conference (CAP93), Pleasanton, CA (United States), 22-26 Feb 1993.
Eppley, K.R.

Funding Information:

AC03-76SF00515

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