Gain measurement of a free electron laser with an optical klystron on the uvsor storage ring

Shiro Takano, Hiroyuki Hama, Goro Isoyama

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We have conducted experiments to measure the gain of a free electron laser (FEL) with an optical klystron (OK) on the UVSOR storage ring. A conventional undulator has been remodeled into the OK in order to increase the gain. The FEL gain at a wavelength of 488 nm has been measured as a function of Nd, which is the number of wavelengths of light passing over an electron in a dispersive section of the OK. The measured gain curve is in good agreement with that calculated according to Madey’s theorem from a measured spectrum of spontaneous radiation. The measured instantaneous peak gain is 0.4% for an average beam current of 10 mA/bunch, which agrees well with the gain calculated theoretically. The gain with the OK is enhanced by a factor of five compared with that with the conventional undulator.

Original languageEnglish
Pages (from-to)1285-1289
Number of pages5
JournalJapanese journal of applied physics
Volume32
Issue number3 R
DOIs
Publication statusPublished - 1993 Mar
Externally publishedYes

Keywords

  • Electron storage ring
  • Free electron laser
  • Gain measurement
  • Optical klystron
  • Synchrotron radiation

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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