2017 Fiscal Year Final Research Report
Ultrabright x-ray harmonic comb by relativistic plasma singularity
Project/Area Number |
26707031
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Research Category |
Grant-in-Aid for Young Scientists (A)
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Allocation Type | Partial Multi-year Fund |
Research Field |
Plasma science
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Research Institution | National Institutes for Quantum and Radiological Science and Technology (2016-2017) Japan Atomic Energy Agency (2014-2015) |
Principal Investigator |
Pirozhkov Alexander 国立研究開発法人量子科学技術研究開発機構, 関西光科学研究所 光量子科学研究部, 上席研究員(定常) (00446410)
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Project Period (FY) |
2014-04-01 – 2018-03-31
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Keywords | コヒーレントX線放射 / 超高強度レーザー / レーザー光とプラズマの相互作用 / 相対論的レーザープラズマ / 相対論的電子スパイク / レーザー光の高次高調波 / BISER |
Outline of Final Research Achievements |
Previously I experimentally discovered bright coherent soft x-rays (high harmonics) using 10-200 Terawatt [1 TW=10^12W] 30-50 femtosecond [1 fs=10^-15s] lasers focused to gas targets. We proposed a theory of x-ray generation by relativistic plasma singularities. Here I tested and confirmed the theory by measuring point-like x-ray sources (the singularities). We generalized the theory and formulated a Burst Intensification by Singularity Emitting Radiation (BISER) concept. I experimentally demonstrated strong dependence of the x-ray brightness on laser quality. I significantly enhanced our J-KAREN-P laser quality. I for the first time experimentally demonstrated coherent x-ray generation tuning using plasma density tailoring. My results open a way to compact bright coherent attosecond [1 as=10^-18s] x-ray source demanded by university and industry labs for coherent x-ray imaging and other applications in material and life sciences.
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Free Research Field |
数物系科学
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Academic Significance and Societal Importance of the Research Achievements |
BISER x-ray yield enhancement and tuning open the way to a compact, ultra-bright, spatially and temporally coherent x-ray source for pumping, probing, imaging, and atto-science. The developed diagnostics and techniques are useful for applications of high-power lasers and are adopted by the community.
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