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APS » Journals » Phys. Rev. Lett. » Volume 73 » Issue 1
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Phys. Rev. Lett. 73, 70–73 (1994)

Spectrum, temporal structure, and fluctuations in a high-gain free-electron laser starting from noise

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R. Bonifacio, L. De Salvo, P. Pierini, N. Piovella, and C. Pellegrini
Dipartimento di Fisica dell’Università di Milano, via Celoria 16, 20133 Milano, Italy
Istituto Nazionale di Fisica Nucleare-Sezione di Milano, via Celoria 16, 20133 Milano, Italy
Department of Physics, University of California Los Angeles, 405 Hilgard Avenue, Los Angeles, California 90024

Received 14 July 1993; published in the issue dated 4 July 1994

We study the time structure, the frequency composition, and the shot to shot fluctuations of the radiation emitted by a free-electron laser starting from shot noise in the electron beam longitudinal distribution, taking into account slippage and finite bunch length effects. We find a very different behavior when the bunch length, scrlb is much longer thatn the cooperation length, scrlc, or of the order of a few scrlc. The field evolution is dominated by slippage effects in both cases, and shows the presence of superradiant spikes.

© 1994 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.73.70
DOI:
10.1103/PhysRevLett.73.70
PACS:
41.60.Cr, 42.60.Jf
 
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