Validation Studies for CHRISTINE-CC Using a Ka-Band Coupled-Cavity TWT
Abstract
A CW Ka-band coupled cavity TWT, a CPI model VTA- 6430A2, is under study at the Naval Research Laboratory, partly for the purpose of validating a large signal coupled- cavity simulation code, CHRISTINE-CC, and an equivalent Block model description, both now under development. The CC-TWT is voltage tunable over the range 28 to 30 GHz, with a rated output power of 500W, and an instantaneous bandwidth of 500 MHz. The simulation code used to model the performance is a coupled cavity version of the CHRISTINE code, originally written to simulate helix TWT's [1]. Briefly, the code employs a 1D disk model representation of the beam, a user-selectable lumped element model of the slow wave circuit, and a user-selectable model of the electric field in the gap. The slow wave circuit model may be chosen to be either that of Curnow [2] or that of Malykhin, Komarov, and Komarov [3], which has some additional flexibility to match the dispersion and impedance characteristics in the cavity and slot bands. The gap field model may be chosen to be either a parabolic shape or a Kosmahl-Branch [4] model. Space charge fields are represented as in the CHRISTINE code for helix TWT's, including an improvement reported in this conference (paper 19-1).
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 2006
- Accession Number
- ADP022612
Entities
People
- B. Levush
- D. Chernin
- D. Dialetis
- J. Legarra
- Jijun Qiu
- T. M. Antonsen Jr.
Organizations
- Leidos