Title :
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
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 TE22,6 mode, with a velocity ratio (v⊥/v||) of 1.43. The MAGY simulations are done for triplet mode excitation (TE21,6, TE22,6 and TE23,6), 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;
Conference_Titel :
Vacuum Electronics Conference, 2004. IVEC 2004. Fifth IEEE International
Print_ISBN :
0-7803-8261-7
DOI :
10.1109/IVELEC.2004.1316355
