2-D large-signal modeling of VKP-8291A using TESLA

Author

Begum, Rasheda ; Eisen, Edward ; Vlasov, Alexander ; Cooke, Simon ; Stockwell, Brad ; Antonsen, Thomas, Jr. ; Levush, Baruch

Author_Institution

Commun. & Power Ind., Palo Alto, CA, USA

fYear

2004

fDate

27-29 April 2004

Firstpage

346

Lastpage

347

Abstract

A P-band klystron built for the Spallation Neutron Source (SNS) application was modeled using TESLA to predict small- and large-signal performances of the device. This particular klystron has six cavities, including one second-harmonic cavity. The cavity parameters as measured in the cold-test experiment were entered as input to TESLA. Measured axial magnetic field as simulated by Maxwell 2-D was input to the code. This paper presents the TESLA output, including particle trajectory plots, electric field plots at different gaps, and the variation of output power with time steps for the device under consideration. Results will also be presented on the effects of different input variables, such as the total number of axial grids, radial grids, and modes on the TESLA-predicted output power of the device.

Keywords

Maxwell equations; UHF tubes; computational electromagnetics; klystrons; particle beam bunching; 2-D large-signal modeling; Maxwell 2-D; P-band klystron; TESLA code; VKP-8291A klystron; bunching factor; electric field plots; electromagnetic fields; electron beams; large-signal simulation code; local waveguide modes; multifrequency code; particle trajectory plots; second-harmonic cavity; self-consistent nonlinear interaction; three-dimensional equations of motion; time-dependent field equations; vacuum electron devices; Educational institutions; Electron beams; Electron devices; Klystrons; Laboratories; Magnetic field measurement; Nonlinear equations; Power generation; Power industry; Two dimensional displays;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, 2004. IVEC 2004. Fifth IEEE International

Print_ISBN

0-7803-8261-7

Type

conf

DOI

10.1109/IVELEC.2004.1316354

Filename

1316354