1999年6月
Improvement of the beam duality by chromaticity correction for wavelength shortening in the NIJI-IV FEL
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
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- 巻
- 429
- 号
- 1-3
- 開始ページ
- 185
- 終了ページ
- 190
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- 出版者・発行元
- ELSEVIER SCIENCE BV
Electron-beam qualities improved by chromaticity correction in the storage ring NIJI-IV were investigated at the beam energy of 309 MeV. Sextupole-quadrupole-sextupole (SQS) magnets, which were installed in all of the short-straight sections in NIJI-IV, perfectly corrected a horizontal and a vertical chromaticity. This improvement suppressed a head-tail instability, so that higher beam current (similar to 30 mA) and higher peak-electron density (similar to 6 x 10(16) m(-3)) were available for FEL experiments. The maximum FEL gain was estimated to be about 2.5% at a wavelength of 240 nm. The lasing of an FEL around 300 nm was achieved in March 1998, and the lasing of an FEL at around 240 nm was successfully observed in May 1998. The shortest wavelength of FELs with the NIJI-IV FEL system was 228 nm. (C) 1999 Elsevier Science B.V. All rights reserved.
- リンク情報
- ID情報
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- ISSN : 0168-9002
- eISSN : 1872-9576
- Web of Science ID : WOS:000081126900035