Generation of Cherenkov superradiance pulses with a peak power exceeding the power of the driving short electron beam
2006; American Physical Society; Volume: 74; Issue: 1 Linguagem: Inglês
10.1103/physreve.74.016501
ISSN1550-2376
AutoresS. D. Korovin, A. A. Eltchaninov, В. В. Ростов, V. G. Shpak, M. I. Yalandin, N. S. Ginzburg, A. S. Sergeev, I. V. Zotova,
Tópico(s)Crystallography and Radiation Phenomena
ResumoTheoretical investigation of a short electron beam (extended bunch) interaction with a backward wave propagating in a slow wave structure demonstrates the possibility of producing ultrashort superradiance pulses with a peak power which exceeds the power of the driving beam (conversion factor K>1). It is shown that a nonuniform slow wave structure with optimized profile is beneficial in order to increase the conversion factor. The results of theoretical analysis are confirmed by the experiments. At X band using the SINUS-150 accelerator (4 ns, 330 kV, 2.6 kA) 0.6-0.8 ns superradiance pulses with a peak power of 1.2 GW and a conversion factor of 1.5 were obtained. Similar experiments at Ka-band based on the RADAN-303 accelerator (1 ns, 290 kV, 2.5 kA) demonstrated production of the superradiance (SR) pulse with duration 200 ps and peak power about 1 GW (conversion factor of 1.4).
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