Experimental study of a 115 GHz quasi-optical gyrotron with a large cavity

A quasi-optical electron cyclotron maser for fusion reactor heating

“…At the University of California, Befleeley, quasi-optical electron cyclotron masers with various output coupling apertures have been studied at 28Ghz [13] [14]. In current research, large radius mirrors arc used to provide the high Q values required for efficient electromagnetic interaction with the electron…”

Design principles for a sheet-beam electron gun for a quasi-optical gyrotron

“…Initial experiments at the U.S. Naval Research Laboratory and the Centre de Recherche en Physique des Plasmas in Lausanne, Switzerland, at frequencies of 100-200 GHz have shown that the device is capable of producing power at the 100-kW level in pulsed (small mirror separation) [5] and CW relevant (large mirror separation) regimes of operation [6]- [9].…”

New results and applications for the quasioptical gyrotron*

“…The electronic efficiency can be written in the form: 77 = 77,pj where 77,p is the is the single particle efficiency given by: = 1 3 .IM (20) r/r=2 (1 -"y•m•) and rl = ýI (Fo, p, A, s) is the normalized efficiency obtained by solving the STS equations of motion. For a given harmonic, and optimized detuning, ý depends only on F, and P, and the results can be presented as an F-p plot of the iso-efficiency contours.…”