Study of X-ray amplification using laser-produced-plasma
| Project/Area Number |
18H03478
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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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| Review Section |
Basic Section 80040:Quantum beam science-related
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| Research Institution | Japan Synchrotron Radiation Research Institute |
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Principal Investigator |
Inubushi Yuichi 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, 主幹研究員 (40506250)
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| Project Period (FY) |
2018-04-01 – 2022-03-31
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| Project Status |
Completed (Fiscal Year 2021)
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| Budget Amount *help |
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2020: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2019: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2018: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
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| Keywords | XFEL / レーザープラズマ / X線分光 |
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| Outline of Final Research Achievements |
The study has been performed to clarify the physics of X-ray amplification using inner-shell-ionized plasma produced by an intense laser pulse. A spatially-resolved single-shot spectrometer which can measure signal and reference spectra simultaneously was developed to diagnose changes of X-ray transmissions between plasma and solid. By using this spectrometer, XFEL spectra transmitted through a plasma produced by a high-power femtosecond laser pulse were measured. Dynamics of bound electrons in ions for a time scale of femto-picosecond could be obtained, although X-ray amplification could not be observed. This result is important to clarify a mechanism of gain formation in a plasma.
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| Academic Significance and Societal Importance of the Research Achievements |
XFEL利用研究では、超高速の化学や物質科学、生物学、X線非線形光学等の幅広い分野において顕著な成果が創出されている。従来の加速器科学ではなく、反転分布を利用するレーザー科学の方法を用いてXFELの出力増大を目指す本研究は、これからのX線レーザーの発展にとって非常に意義がある。また、そのゲイン媒質として利用するプラズマについて、本研究では、フェムト秒時間分解のX線吸収分光計測を実施し、過渡的な電離状態を明らかにした。これは、これまで計測が不可能であったプラズマの超高速現象を初めて観測したものであり、今後の高エネルギー密度科学の発展に寄与することが期待される。
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Report
(5 results)
Research Products
(1 results)
