Generation of powerful ultrashort electromagnetic pulses based on superradiance

Ginzburg, N S and Zotova, I V and Novozhilova, Y V and Sergeev, A S and Phelps, A D R and Cross, A W and Wiggins, S M and Ronald, K and Shpak, V G and Yalandin, M I and Shunailov, S A and Ulmaskulov, M R (2001) Generation of powerful ultrashort electromagnetic pulses based on superradiance. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 475 (1-3). pp. 385-390. ISSN 0168-9002 (https://doi.org/10.1016/S0168-9002(01)01545-5)

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Abstract

Experimental results of the observation of superradiation from intense, subnanosecond electron bunches moving through a periodic waveguide and interacting with a backward propagating TM01 wave 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, leads to an estimate of the peak power as high as 60-120 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 75ps are also reported. Comparison with simulations is discussed as well.

ORCID iDs

Ginzburg, N S, Zotova, I V, Novozhilova, Y V, Sergeev, A S, Phelps, A D R ORCID logoORCID: https://orcid.org/0000-0002-1100-1012, Cross, A W ORCID logoORCID: https://orcid.org/0000-0001-7672-1283, Wiggins, S M ORCID logoORCID: https://orcid.org/0000-0001-7804-6146, Ronald, K ORCID logoORCID: https://orcid.org/0000-0002-8585-0746, Shpak, V G, Yalandin, M I, Shunailov, S A and Ulmaskulov, M R;
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