Abstract
Summary form only given, as follows. Comparisons of microwave frequency and electron beam alpha (Vperp/Vparallel) measurements to gyrotron dispersion relations are investigated. Alpha measurements are obtained by measuring radiation darkening patterns of glass plates. Frequencies are determined to within 500 MHz using microstrip microwave frequency filters. More accurate frequency measurements are taken using heterodyne detection. Frequency and alpha measurements are essential for determining the mode of operation of the rectangular cross section (RCS) gyrotron. The RCS gyrotron can be operated from 2-4 GHz in either the TE10 and TE01 modes. The relativistic electron beam is generated by MELBA (Michigan electron long beam accelerator) with the following operating parameters: -800 kV, 1-10 kA diode current, 0.2-0.5 kA tube current, 0.5-1.0 /spl mu/s pulselength.
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