Petawatt Laser Direct Heating of Uniformly Imploded CD Shell Target
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- KITAGAWA Yoneyoshi
- ILE, Osaka University The Graduate School for Creation of the New Photonics Industries
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- SENTOKU Yasuhiko
- University of Nevada, Reno
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- TANAKA Kazuo A.
- ILE, Osaka University
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- KODAMA Ryosuke
- ILE, Osaka University
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- NISHIMURA Hiroaki
- ILE, Osaka University
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- NAKAI Mitsuo
- ILE, Osaka University
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- NORIMATSU Takayoshi
- ILE, Osaka University
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- SUNAHARA Atsushi
- ILE, Osaka University
Bibliographic Information
- Other Title
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- 球対称爆縮ターゲットのペタワットレーザー高速加熱
- キュウ タイショウ バクシュク ターゲット ノ ペタワットレーザー コウソク カネツ
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Abstract
An uniformly imploded deuterated polystyrene (CD) shell target is fast-heated by a Petawatt (PW) laser without cone guide. The best illumination timing is found to be in a narrow region around 80±20 picoseconds from the onset of the stagnation phase, where thermal neutrons are enhanced four to five times by the PW laser of energy less than 10% of the implosion laser. The timing agrees with the timings of enhancement of the X-ray emission from the core and reduction of the Bremsstrahlung radiation from scattered hot electrons. The PW laser, focused to the critical density point, generates the energetic electrons within so narrow angle as 30º, which heats the imploded CD shell, of which the internal energy is 50 J, to enhance thermal neutrons. The increment of the internal energy is 15 J, which seems to agree with the energy reduction of the hot electrons. These results first show that the PW laser directly heats the imploded core without any cone-like laser guide.
Journal
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- Journal of Plasma and Fusion Research
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Journal of Plasma and Fusion Research 81 (5), 384-390, 2005
The Japan Society of Plasma Science and Nuclear Fusion Research
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Details 詳細情報について
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- CRID
- 1390282681489765120
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- NII Article ID
- 110006282116
- 120004837555
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- NII Book ID
- AN10401672
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- BIBCODE
- 2005JPFR...81..384K
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- HANDLE
- 11094/3352
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- NDL BIB ID
- 7375523
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- ISSN
- 09187928
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- Text Lang
- ja
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- Data Source
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- JaLC
- IRDB
- NDL
- Crossref
- NDL-Digital
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed