EXPERIMENTAL STUDIES OF UNUSUAL EFFECTS IN FAST CYCLOTRON WAVE AMPLIFIERS

Abstract : Experiments are described with transverse wave amplifiers without pump structure. Two tubes have been built and tested. The first employed three identical Cuccia couplers separated by drift regions. The net gain was strongly dependent on the coupler spacings. The second tube had bellows permitting continuous variation of the distance between the two couplers employed. Net gain was observed, but it was impossible to find any definite correlation between drift length and gain. In addition some experiments with various gun configurations are described. (Author)