| Project/Area Number |
25790093
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Quantum beam science
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| Research Institution | Japan Synchrotron Radiation Research Institute |
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Principal Investigator |
KATAYAMA Tetsuo 公益財団法人高輝度光科学研究センター, XFEL利用研究推進室, 研究員 (90648073)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | X線自由電子レーザー / 超高速時間分解計測 / X線吸収分光 / 時間分解X線吸収分光 |
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| Outline of Final Research Achievements |
I have developed two experimental schemes, dispersive and fluorescence yield methods, for time resolved x-ray absorption spectroscopy. To confirm their performance to trace the ultrafast intermediates in light-induced reactions, time-resolved measurements were performed for iron ferrioxalate solution, combined with synchronized optical laser. I successfully observed the bond dissociation, change of electronic structures with sub-picosecond time resolution.
Furthermore, I have tried to improve the time resolution limited by the relative timing jitter between XFEL and optical laser. The high-intensity x-ray irradiation induces the fast increase of electronic temperature and transmission decrease inside the semiconductor (GaAs) wafer. Combined with spatial decoding, the timing jitter was measured. I successfully achieved ~10 femtoseconds accuracy in the measurement, which improves the time resolution drastically.
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