Title :
94-GHz 25-kW CW low-voltage harmonic gyrotron
Author :
McDermott, D.B. ; Statzman, R.C. ; Balkcum, A.J. ; Luhmann, N.C., Jr.
Author_Institution :
Dept. of Appl. Sci., California Univ., Irvine, CA, USA
fDate :
6/1/1998 12:00:00 AM
Abstract :
A low-voltage second-harmonic gyrotron intended as a compact lightweight source has been designed and evaluated with a particle-tracing code and the particle-in-cell code MAGIC. The two codes are shown to be in good agreement when applied to a conventional fundamental-frequency gyrotron and also to the novel second-harmonic gyrotron. The 25-kW continuous wave (CW) 94-GHz gyrotron with a predicted conversion efficiency of 32% and device efficiency of 22.5% is driven by a 25-kV 4.5-A (υ⊥/υ2=1.5, Δυz/υz=7%) electron beam from a magnetron injection gun and employs a low-loss TE021/TE031 complex cavity for mode control. Although the 17-kG CW gyrotron will use a cryogen-free high-Tc superconducting magnet, a 94-GHz prototype will be tested at low duty with a conventional low-Tc superconducting magnet
Keywords :
gyrotrons; superconducting magnets; 22.5 percent; 25 kV; 25 kW; 32 percent; 94 GHz; CW low-voltage second harmonic gyrotron; MAGIC code; compact lightweight millimetre wave source; conversion efficiency; cryogen-free high-Tc superconducting magnet; device efficiency; electron beam; low-Tc superconducting magnet; low-loss TE021/TE031 complex cavity; magnetron injection gun; mode control; particle-in-cell code; particle-tracing code; Cyclotrons; Electron beams; Frequency; Gyrotrons; Magnetic devices; Magnetic fields; Magnetic resonance; Superconducting magnets; Tellurium; Testing;
Journal_Title :
Plasma Science, IEEE Transactions on
