2022 Fiscal Year Final Research Report
Time-resolved diagnostics of relativistic plasma singularities
| Project/Area Number |
19KK0355
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| Research Category |
Fund for the Promotion of Joint International Research (Fostering Joint International Research (A))
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 14:Plasma science and related fields
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| Research Institution | National Institutes for Quantum Science and Technology |
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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 (00446410)
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| Project Period (FY) |
2020 – 2022
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| Keywords | Plasma singularities / Coherent x-ray source / BISER / Relativistic plasma / New imaging paradigm |
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| Outline of Final Research Achievements |
We are developing a spatially and temporally coherent bright attosecond keV x-ray source (>1e12 photons, ~1e-17 s) [Root Project: Kiban(A)19H00669], where laser-driven relativistic plasma singularities emit x-rays (Burst Intensification by Singularity Emitting Radiation, BISER phenomenon discovered by us [Pirozhkov, Esirkepov, et al., Sci. Rep. 7, 17968 (2017)]). Earlier, we deduced singularities only by their time-integrated x-ray emission. We proposed to boost our Root Project by direct time-resolved visualization of singularities necessary to increase the photon number and source stability.
We developed two diagnostics: (1) optical probing with probe pulse post compression and (2) femtosecond-Kerr-gated imaging. The advanced diagnostics already led to >100x BISER brightness increase in our experiment in the UK. These diagnostics will be used for singularity visualization simultaneously with measuring coherent BISER x-rays in the FY2023 Root Project experiment.
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| Free Research Field |
Physics
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| Academic Significance and Societal Importance of the Research Achievements |
Unlike too-long-pulse XFEL or too-weak@keV atomic harmonics, our new x-ray source can image nanostructures and macromolecules before electrons escape. This will enable revolutionary Attosecond Lensless Quantum Imaging, show true molecule structure, and may clarify a debatable quantum nature of life.
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