1997 Fiscal Year Final Research Report Summary
Dynamics of Laser Imploded core observed with Ultra-fast X-Ray Imaging
| Project/Area Number |
08458135
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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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| Research Field |
Nuclear fusion studies
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| Research Institution | Osaka University |
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Principal Investigator |
SHIRAGA Hiroyuki Institute of Laser Engineering, Osaka Univ., Res Associate, レーザー核融合研究センター, 助手 (90183839)
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| Co-Investigator(Kenkyū-buntansha) |
TAKABE Hideaki Institute of Laser Engineering, Osaka Univ., Professor, レーザー核融合研究センター, 教授 (20150352)
MIYANAGA Noriaki Institute of Laser Engineering, Osaka Univ., Associate Professor, レーザー核融合研究センター, 助教授 (80135756)
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| Project Period (FY) |
1996 – 1997
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| Keywords | Ultra-fast X-Ray Imaging / Multi-Image X-Ray Streak Camera / Sampling-Image X-Ray Streak Camera / Image Sampling / Implosion Dynamics / Imploded core / Hot Spark / Laser Fusion |
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| Research Abstract |
Novel diagnostic technique for observing dynamics of the laser-imploded core plasmas with a temporal resolution better than 10 ps was developed by using a image-sampling procedure applied to an x-ray streak camera, which is called MIXS (Multi-Imaging X-Ray Streak Camera). It is the most fast two-dimensional x-ray imaging technique ever made. Further development of the MIXS,such as spectrally resolved MIXS as well as two-dimensional sampling technique, were achieved.
The MIXS system was introduce to the target implosion experiments at Gekko-XII laser facility, and its time-resolved core dynamics of the imploded target was directly observed for the first time. From the comparison of the observed images with 1D- and 2D-simulations, it was found that the heating of the central spark of the core is terminated during the stagnation phase.
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