| Project/Area Number |
24654054
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
HINODE Fujio 東北大学, 電子光理学研究センター, 准教授 (60292207)
KURIKI Masao 広島大学, 先端物質科学研究科, 教授 (80321537)
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| Project Period (FY) |
2012-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 電子ビーム / 低エミッタンス / 偏極ビーム / エミッタンス交換 / 偏極電子ビーム / リニアコライダー / 電子銃 / エミッタンス / 高品質電子ビーム / 高周波空洞 / 扁平ビーム |
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| Outline of Final Research Achievements |
We have developed a photocathode RF gun with DAW structure type to generate an extremely low emittance and spin polarized electron beam. NEA-GaAs cathode is used for generation of spin polarized electron beam, NEA-GaAs has a vulnerability issue and it requires an ultra-high vacuum level. It has confirmed that it is possible to install the additional vacuum pumping system to the DAW type of RF gun system without reducing the Q-value of cavities. On the other hand, to overcome a vulnerability issue of NEA surface, we evaporated CsTe semi-conductor thin film on GaAs surface and obtained a result which suggest NEA surface on GaAs wafer. This could be another technique for the NEA activation with Cs-O/F. To make the high aspect ratio of the beam shape, the X-Y emittance exchange technique is employed for RF gun system. We have performed tracking simulation for KEK-STF beam line. We established the emittance exchange method by using solenoid magnet and a set of skew quadrupole magnets.
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