Electron Beam Qualities with and without Free Electron Laser Oscillations in the Compact Storage Ring NIJI-IV
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概要
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The electron-beam qualities with and without free electron laser (FEL) oscillations were investigated in the compact storage ring NIJI-IV. The peak-electron density in a bunch was suppressed by beam instabilies, so that it was limited to about $1.0 \times 10^{17}$ m-3. The maximum FEL gain estimated for 215 and 300 nm using a well-known one-dimension theory was about 2.8% and 4.6%. The cavity loss at 300 nm was evaluated to be about 2% from the threshold beam current. The bunch length and energy spread with FEL oscillations increased by 1.3 times or more due to bunch heating. The ratio of the FEL gain to a cavity loss estimated from the beam qualities with and without FEL oscillations was almost in accord with the ratio evaluated directly with the measured data of the FEL gain and the cavity loss.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2003-09-15
著者
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YASUMOTO Masato
Photonics Research Institute
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YAMADA Kawakatsu
Photonics Research Institute, National Institute of Advanced Industrial Science and Technology
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OGAWA Hiroshi
Photonics Research Institute, National Institute of Advanced Industrial Science and Technology
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Mikado Tomohisa
Photonics Research Institute National Institute Of Advanced Industrial Science And Technology
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Sei Norihiro
Photonics Research Institute National Institute Of Advanced Industrial Science And Technology
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Yasumoto Masato
Photonics Research Institute, National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
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