Petawatt-laser direct heating of uniformly imploded deuterated-polystyrene shell target.
Petawatt-laser direct heating of uniformly imploded deuterated-polystyrene shell target.
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DOI：
10.1103/physreve.71.016403
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发表时间：
2005
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影响因子：
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通讯作者：
Y. Kitagawa;Y. Sentoku;S. Akamatsu;Wataru Sakamoto;K. Tanaka;R. Kodama;H. Nishimura;Y. Inubushi;M. Nakai;T. Watari;T. Norimatsu;A. Sunahara
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文献类型：
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作者：
Y. Kitagawa;Y. Sentoku;S. Akamatsu;Wataru Sakamoto;K. Tanaka;R. Kodama;H. Nishimura;Y. Inubushi;M. Nakai;T. Watari;T. Norimatsu;A. Sunahara
均匀内爆的氘化聚苯乙烯 (CD) 壳目标由拍瓦 (PW) 激光器快速加热，无需锥体导向。最佳照明时间被发现是在从停滞阶段开始大约 80+/-20 皮秒的狭窄区域内，其中热中子被能量小于内爆激光 10% 的 PW 激光增强了四到五倍。该时间与增强核心X射线发射和减少散射热电子轫致辐射的时间一致。聚焦到临界密度点的 PW 激光在 30 度的狭窄角度内产生高能电子，然后加热内爆的 CD 壳以增强热中子。这些结果首先表明，PW 激光器直接加热内爆核心，无需任何锥形激光引导。
A 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 as narrow an angle as 30 degrees , which then heats the imploded CD shell to enhance thermal neutrons. These results first demonstrate that the PW laser directly heats the imploded core without any conelike laser guide.