Thomson scattering measurement of a collimated plasma jet generated by a high-power laser system
Thomson scattering measurement of a collimated plasma jet generated by a high-power laser system
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高功率激光系统产生的准直等离子体射流的汤姆逊散射测量
DOI：
10.1088/1742-6596/688/1/012098
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
K. Zh
中科院分区：
文献类型：
--
作者：
T. Ishikawa;Y. Sakawa;T. Morita;Y. Yamaura;Y. Kuramitsu;T. Moritaka;T. Sano;R. Shimoda;K. Tomita;K. Uchino;S. Matsukiyo;A. Mizuta;N. Ohnishi;R. Crowston;N. Woolsey;H. Doyle;G. Gregori;M. Koenig;C. Michaut;A. Pelka;D. Yuan;Y. Li;K. Zh
等离子体喷流的准直是天体物理和等离子体物理中一个重要而有趣的问题。使等离子体流传播很长距离的准直机制尚未被详细理解。我们一直在研究一个模型实验，以模拟具有外部磁场的天体物理等离子体射流[西尾等人，EPJ。Web of Conferences 59，15005（2013）]。该实验使用大坂大学激光工程研究所的Gekko XII HIPER激光系统进行。我们拍摄了CH平面靶（3mm × 3mm × 10 μm），观察了其背面等离子体流。通过分离激光束的焦斑产生准直等离子体流或等离子体射流。在这份报告中，我们测量等离子体射流结构没有外部磁场与阴影，同时测量等离子体射流的局部参数，即，电子密度，电子和离子的温度，电荷状态，和漂移速度，集体汤姆逊散射。
One of the important and interesting problems in astrophysics and plasma physics is collimation of plasma jets. The collimation mechanism, which causes a plasma flow to propagate a long distance, has not been understood in detail. We have been investigating a model experiment to simulate astrophysical plasma jets with an external magnetic field [Nishio et al., EPJ. Web of Conferences 59, 15005 (2013)]. The experiment was performed by using Gekko XII HIPER laser system at Institute of Laser Engineering, Osaka University. We shot CH plane targets (3 mm× 3 mm× 10 μm) and observed rear-side plasma flows. A collimated plasma flow or plasma jet was generated by separating focal spots of laser beams. In this report, we measured plasma jet structure without an external magnetic field with shadowgraphy, and simultaneously measured the local parameters of the plasma jet, ie, electron density, electron and ion temperatures, charge state, and drift velocity, with collective Thomson scattering.