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Wiggins SM, Jaroszynski DA, McNeil BW, et al. Self-amplification of coherent spontaneous emission in a cherenkov free-electron maser. Phys Rev Lett. 2000;84(11):2393-6doi: 10.1103/PhysRevLett.84.2393.
Wiggins, S. M., Jaroszynski, D. A., McNeil, B. W., Robb, G. R., Aitken, P., Phelps, A. D., Cross, A. W., Ronald, K., Ginzburg, N. S., Shpak, V. G., Yalandin, M. I., Shunailov, S. A., & Ulmaskulov, M. R. (2000). Self-amplification of coherent spontaneous emission in a cherenkov free-electron maser. Physical review letters, 84(11), 2393-6. https://doi.org/10.1103/PhysRevLett.84.2393
Wiggins, et al. "Self-amplification of coherent spontaneous emission in a cherenkov free-electron maser." Physical review letters vol. 84,11 (2000): 2393-6. doi: https://doi.org/10.1103/PhysRevLett.84.2393
Wiggins SM, Jaroszynski DA, McNeil BW, Robb GR, Aitken P, Phelps AD, Cross AW, Ronald K, Ginzburg NS, Shpak VG, Yalandin MI, Shunailov SA, Ulmaskulov MR. Self-amplification of coherent spontaneous emission in a cherenkov free-electron maser. Phys Rev Lett. 2000 Mar 13;84(11):2393-6. doi: 10.1103/PhysRevLett.84.2393. PMID: 11018893.
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Phys Rev Lett. 2000 Mar 13;84(11):2393-6. doi: 10.1103/PhysRevLett.84.2393.

Self-amplification of coherent spontaneous emission in a cherenkov free-electron maser.

Physical review letters

Wiggins, Jaroszynski, McNeil, Robb, Aitken, Phelps, Cross, Ronald, Ginzburg, Shpak, Yalandin, Shunailov, Ulmaskulov

Affiliations

  1. Department of Physics and Applied Physics, University of Strathclyde, Glasgow G4 0NG, United Kingdom.

PMID: 11018893 DOI: 10.1103/PhysRevLett.84.2393

Abstract

Ultrashort pulses of microwave radiation have been produced in a dielectric-lined Cherenkov free-electron maser (FEM) amplifier. An intense initial seed pulse, due to coherent spontaneous emission (CSE), arises at the leading edge of the electron pulse. There is evidence to show that 3-4 cycle spikes are produced through the amplification of these seed pulses. A strong dependence of the start-up power on the rise time of the electron pulse has been found. The experimental results are verified by a theoretical analysis. Our study shows that amplification in a FEM amplifier is always initiated by CSE arising from the edge of the electron pulse when the rise time is comparable to the electromagnetic wave period.

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