Abstract
Experimental measurements of coherent stimulated radiation from intense, subnanosecond electron bunches moving through a periodic waveguide and interacting with a backward propagating TM01 male are presented. The ultra-short microwave pulses in Ka, W, and G band were generated with repetition frequencies of up to 25 Hz, Observation of RF breakdown of ambient air, as well as direct measurements by hot-carrier germanium detectors, gives an estimate of the peak power up to 140 MW for the 300-400 ps pulses at 38 GHz. The initial observation of 75 GHz 10-15 MW radiation pulses with duration less than 150 ps, and of 150 GHz microwave spikes with a risetime of 75 ps are also reported.
Original language | English |
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Pages (from-to) | 1615-1619 |
Number of pages | 5 |
Journal | IEEE Transactions on Plasma Science |
Volume | 28 |
Issue number | 5 |
DOIs | |
Publication status | Published - Oct 2000 |
Keywords
- backward-wave oscillator
- microwave pulse
- subnanosecond pulse
- superradiance
- electron bunches