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Title: Postsaturation dynamics and superluminal propagation of a superradiant spike in a free-electron laser amplifier

Journal Article · · Physical Review Accelerators and Beams
 [1];  [2];  [3]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Elettra-Sincrotrone Trieste (Italy)
  3. Elettra-Sincrotrone Trieste (Italy); Lab. Nazionali di Frascati (Italy)

We study the dynamics of an isolated spike of radiation in superradiant regime. We show that conditions exist where the pulse moves with a group velocity larger than the velocity of light in vacuum and is followed by a pedestal resulting from a complex postsaturation dynamics. The tail is constituted by a train of subpulses with both transverse and longitudinal coherence and decaying amplitudes. We analyze the dynamical conditions leading to the formation of the main pulse and the tail. We study the correlation of the tail structure with the longitudinal phase space of the electrons, and provide a recipe to partially suppress this tail.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1593245
Report Number(s):
BNL-213561-2020-JAAM; PRABCJ; TRN: US2101082
Journal Information:
Physical Review Accelerators and Beams, Vol. 23, Issue 1; ISSN 2469-9888
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

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