2023 Fiscal Year Final Research Report
Microscale radiography of complex hydrodynamics phenomena in high-density laser plasma
| Project/Area Number |
21K03499
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 14010:Fundamental plasma-related
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| Research Institution | Osaka University |
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Principal Investigator |
Pikuz Tatiana 大阪大学, 先導的学際研究機構, 特任准教授(常勤) (20619978)
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| Co-Investigator(Kenkyū-buntansha) |
中村 浩隆 大阪大学, 大学院工学研究科, 助教 (60532562)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | X-ray radiography / Phase-contrast imaging / XFEL / Shock compression / Hydrodynamic phenomena / LiF crystal / Shock waves / Hydrodynamic instability |
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| Outline of Final Research Achievements |
Developed conceptually new phase-contrast imaging (PCI) platform with XFEL and coaxial multi-imaging detection system based on two LiF crystal detectors and CCD. For the first time, the PCI method was supplemented by simultaneous radiography in Fresnel diffraction mode, significantly improving the accuracy of the density retrieval procedure for objects with complicated morphology.
The platform was successfully applied at SACLA BL3. At 10 experimental runs were obtained: (a) pioneering radiographic data about dynamics of shock waves in solids relevant to HEDP; (b) detailed visualization of Rayleigh-Taylor instabilities (RTI) at all stages of evolution from initial interface to the turbulent flow; (c) measured the power spectrum of RTI and found the feature never observed before; (d) developed theory and performed comprehensive simulations of elastic-plastic shock waves splitting in dynamically compressed diamond; (e) transonic dislocation propagation in diamond observed for first time.
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| Free Research Field |
Physics
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| Academic Significance and Societal Importance of the Research Achievements |
Delivered new knowledges on problem of hydrodynamic instabilities important for ICF, astrophysical objects, Earth's magnetosphere and mantle. X-ray radiography of RTI and shock compression in solids were studied with record spatial resolution 0.8 microns needed for verification theory and сodes.
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