| Project/Area Number |
13440078
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
素粒子・核・宇宙線
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
SASAO Noboru Kyoto U., Faculty of Science, Professor, 大学院・理学研究科, 教授 (10115850)
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| Co-Investigator(Kenkyū-buntansha) |
TANIGUCHI Takashi KEK, Inst Part. Nucl Study, Assistant, 素粒子原子核研究所, 助手 (60163630)
HIGASHI Yasuo KEK, Machine Center, Assistant Professor, 工作センター, 助教授 (70208742)
URAKAWA Jyunji KEK, Accelerator Center, Assistant Professor, 加速器研究センター, 助教授 (00160333)
NOMURA Tadashi Kyoto U., Faculty of Science, Assistant, 大学院・理学研究科, 助手 (10283582)
NAKAYA Tuyoshi Kyoto U., Faculty of Science, Assistant Professor, 大学院・理学研究科, 助教授 (50314175)
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| Project Period (FY) |
2001 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥15,900,000 (Direct Cost: ¥15,900,000)
Fiscal Year 2002: ¥5,400,000 (Direct Cost: ¥5,400,000)
Fiscal Year 2001: ¥10,500,000 (Direct Cost: ¥10,500,000)
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| Keywords | Laser wire / Fabry-Perot Optical cavity / Low emittance beam / Compton scattering / ファブリペロ共振器 |
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| Research Abstract |
Production of ultra low emittance electron beams is one of the essential techniques in realizing third-generation synchrotron radiation light sources, free electron lasers and/or high-energy electron linear colliders. The main purpose of the present research is to develop a precision beam profile monitor which can directory measure small electron beam sizes in a storage ring. This monitor is based on the Compton scattering of electrons with a laser wire, which is a thin light target installed in the beam. It is realized by injecting laser light into a Fabry-Perot optical cavity. We summarize the main results of this research below.
(1) We developed an optical cavity with the power gain as large as 2000 and the laser beam waist of 11 um.
(2) We successfully measured the electron beam sizes of the ATF damping ring operated in a single bunch mode, and demonstrated that it achieved the target emittance of 1.1x10^{-11} mrad in the vertical direction and 1.1x10^{-9} mrad in the horizontal.
(3) We also measured the electron beam size in a multi-bunch mode, and found that there was no big bunch-to-bunch dependence. The present research established the techniques of the laser wire beam profile monitor and contributed to the understandings of ultra-low emittance beam dynamics.
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