MAGY simulations of 1.5 MW, 110 GHz MIT gyrotron with non-uniform electron emission

Author

Choi, E.M. ; Anderson, J.P. ; Sirigiri, J.R. ; Shapiro, M.A. ; Temkin, R.J.

Author_Institution

Plasma Sci. & Fusion Center, MIT, Cambridge, MA, USA

fYear

2004

fDate

27-29 April 2004

Firstpage

348

Lastpage

349

Abstract

We present simulation results from the code MAGY of a 110 GHz, 1.5 MW gyrotron which is currently in short pulse operation at MIT. The experimental peak power is 1.44 MW at 37 % efficiency, when operating in the TE_22,6 mode, with a velocity ratio (v_⊥/v_||) of 1.43. The MAGY simulations are done for triplet mode excitation (TE_21,6, TE_22,6 and TE_23,6), and include both velocity spread and the azimuthal nonuniform charge density of the electron beam. For a velocity spread of 5.5 % and the measured value of beam emission nonuniformity, the MAGY simulations are in good agreement with the measured experimental results.

Keywords

computational electromagnetics; gyrotrons; millimetre wave tubes; 1.5 MW; 110 GHz; MAGY code; azimuthal charge density; beam emission nonuniformity; beamlets; gyrotron simulation; nonuniform electron emission; short pulse operation; triplet mode excitation; velocity spread; Degradation; Electron beams; Electron emission; Frequency; Gyrotrons; Nuclear and plasma sciences; Plasma simulation; Pulse shaping methods; Velocity measurement; Voltage;

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.2004.1316355

Filename

1316355