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Proceedings Paper

Induction Linac-Driven Free-Electron Lasers: Status And Future Prospects
Author(s): D. Prosnitz
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Paper Abstract

The free-electron laser (FEL) directly converts the energy of an electron beam to electromagnetic radiation. The properties of the radiation are intimately related to the characteristics of the accelerator that produces the electron beam. A radio-frequency (rf) accelerator produces a high-frequency (1-100 MHz) burst of short electron pulses (10-30 ps) at relatively low peak current. The burst typically lasts tens of microseconds. The low peak current (0.1-1 kA) implies that an FEL driven by an rf accelerator must operate with low single-pass optical gain and produce radiation pulses of relatively low peak power. By contrast, an induction linac (IL) accelerator produces an electron beam consisting of longer (50 ns), higher current (1-10 kA) pulses. These pulses can be produced in a variety of pulse formats, including a series of high repetition rate bursts or a cw pulse train. For equal average powers, the induction linac operates at a lower duty factor than the RF accelerator.

Paper Details

Date Published: 23 July 1988
PDF: 4 pages
Proc. SPIE 0738, Free Electron Lasers, (23 July 1988); doi: 10.1117/12.939691
Show Author Affiliations
D. Prosnitz, Lawrence Livermore National Laboratory (United States)

Published in SPIE Proceedings Vol. 0738:
Free Electron Lasers
Brian Emerson Newnam, Editor(s)

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