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BASIC RESEARCH IN MICROWAVE DEVICES AND QUANTUM ELECTRONICS.
MICHIGAN UNIV ANN ARBOR ELECTRON PHYSICS LAB
Generation and Amplification of Coherent Electromagnetic Energy in the Millimeter and submillimeter Wavelength Region The construction of the experimental low-frequency model of the frequency multiplier with feedback scheme to enhance the transfer efficiency has been completed. D-c beam testing shows that the tube is aligned satisfactorily. The tube is now awaiting final r-f testing. Difficulties of brazing a 30 Gc helix into a BeO tube have not been resolved. Techniques involving the use of Fansteel 60 metal are being developed. Analysis of Amplitude and Phase-Modulated Traveling-Wave Amplifiers A nonlinear theory of the amplitude and phasemodulated traveling-wave amplifier with a multiple frequency input is developed. Computer results for some typical cases are presented and interpreted. Study of a D-c Pumped Quadrupole Amplifier The mechanism of an anomalous gain predicated for the cyclotron-to-synchronous wave interaction is explained in terms of kinetic power relations. Experimental results from other sources give support to this theory. Author
Quarterly progress rept. no. 4, 1 Feb-1 May 64