Title :
Direct experimental observation of π-mode oscillation in a relativistic magnetron
Author :
Smith, R.R. ; Sze, H. ; Harteneck, B. ; Benford, J.
Author_Institution :
Phys. Int. Co., San Leandro, CA, USA
fDate :
4/1/1988 12:00:00 AM
Abstract :
The authors report the direct measurement of the operating mode of a relativistic magnetron. The S-band 2.65-GHz magnetron used has a washer cathode and is driven by a 1-MV 2.8-Ω 65-ns pulser. Power and pulse shape are measured simultaneously by calibrated couplers, cables, and crystal diodes. The frequency is measured as the heterodyne or difference frequency between a local oscillator and the extracted signal. This difference frequency is several-hundred megahertz. By directly measuring the phase relationship, any questions concerning perturbations of the resonance by the large current of relativistic electrons are avoided
Keywords :
magnetrons; relativistic electron beam tubes; π-mode oscillation; 1 MV; 2.65 GHz; 2.8 ohm; 65 ns; S-band; cables; calibrated couplers; crystal diodes; difference frequency; extracted signal; heterodyne; local oscillator; phase relationship; pulse shape; pulser; relativistic electrons; relativistic magnetron; washer cathode; Cables; Cathodes; Couplers; Diodes; Frequency measurement; Local oscillators; Power measurement; Pulse measurements; Pulse shaping methods; Shape measurement;
Journal_Title :
Plasma Science, IEEE Transactions on
