Time evolution of collisionless shock in counterstreaming laser-produced plasmas |
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| Authors: | Kuramitsu Y Sakawa Y Morita T Gregory C D Waugh J N Dono S Aoki H Tanji H Koenig M Woolsey N Takabe H |
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| Institution: | Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, 565-0871 Japan. kuramitsu-y@ile.osaka-u.ac.jp |
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| Abstract: | We investigated the time evolution of a strong collisionless shock in counterstreaming plasmas produced using a high-power laser pulse. The counterstreaming plasmas were generated by irradiating a CH double-plane target with the laser. In self-emission streaked optical pyrometry data, steepening of the self-emission profile as the two-plasma interaction evolved indicated shock formation. The shock thickness was less than the mean free path of the counterstreaming ions. Two-dimensional snapshots of the self-emission and shadowgrams also showed very thin shock structures. The Mach numbers estimated from the flow velocity and the brightness temperatures are very high. |
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