1997 Fiscal Year Final Research Report Summary
Interaction of relativistic intensity laser with a compressed plasma
| Project/Area Number |
08680504
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
プラズマ理工学
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| Research Institution | Osaka University |
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Principal Investigator |
TAKABE Hideaki Institute of Laser Engineering, Osaka University, Professor, レーザー核融合研究センター, 教授 (20150352)
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| Co-Investigator(Kenkyū-buntansha) |
MURAKAMI Masakatsu Institute of Laser Engineering, Osaka University, Res.Associate, レーザー核融合研究センター, 助手 (80192772)
MIMA Kunioki Institute of Laser Engineering, Osaka Univ., Professor, レーザー核融合研究センター, 教授 (30033921)
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| Project Period (FY) |
1996 – 1997
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| Keywords | relativistic plasma / laser plasma / fast ignition / fusion |
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| Research Abstract |
Drastic progress of laser technology have made it possible to produce a relativistic plasma. By use of this advance, the fast ignition scheme has been proposed in laser fusions. The purpose of this project is to study the laser plasma interactions in a compressed plasma and to clarify the physics of fast ignition.
At first, we have studied the hole boring process to guide a ultra-short pulse to heat the edge of a compressed fuel. In one case, we have studied the relativistic interaction physics of laser and plasma by solving Vlasov-Maxwell equations with massive parallel computer. As the result, it is found that the self-focusing is not always expected, while the propagating laser beam breaks up due to the Weibel-type instability. This fact is also confirmed in the study with a particle code.
Concerning the ignition and burn in the compressed core, we have clarified a scaling law of fusion gain of a given compressed core by use of 2-dimensional implosion code with alpha-particle transport code. Regardless whether ignition is triggered at the core center or edge, almost the same ignition condition has been obtained, It is also found that the target gain about 200 can be obtained in principle for the case of Mega Joule laser irradiation.
Model experiments of astronomical phenomena can be designed with the intense laser lights. This topics is related to the present project and is briefly described in the report.
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