Optical guidance of terrawatt laser pulses by the implosion phase of a fast Z-pinch discharge in a gas-filled capillary.
Optical guidance of terrawatt laser pulses by the implosion phase of a fast Z-pinch discharge in a gas-filled capillary.
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DOI：
10.1364/ol.25.000010
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发表时间：
2000
期刊：
影响因子：
3.6
通讯作者：
T. Hosokai;M. Kando;H. Dewa;H. Kotaki;S. Kondo;N. Hasegawa;K. Nakajima;K. Horioka
中科院分区：
文献类型：
--
作者：
T. Hosokai;M. Kando;H. Dewa;H. Kotaki;S. Kondo;N. Hasegawa;K. Nakajima;K. Horioka
提出了一种利用充气毛细管中快速Z箍缩放电的内爆相进行光导引的新方法。内爆等离子体柱在径向方向上具有凹的电子密度分布，就在由会聚电流片和冲击波驱动的停滞相之前。实验证明了用这种方法对高强度（>1 × 10（17）W/cm（2））钛宝石激光脉冲进行2cm距离（相当于12.5倍瑞利长度）光学制导的可行性。用He-Ne激光束直接探测了导向通道的形成过程。在完全电离的通道中的电子密度估计为2.0 × 10（17）cm（-3）的轴上和7.0 × 10（17）cm（-3）的通道边缘的峰值，直径为70 μ m，如实验结果所示，这是由磁流体动力学模拟证实。
A new method of optical guidance by the implosion phase of a fast Z-pinch discharge in a gas-filled capillary is proposed. An imploding plasma column has a concave electron-density profile in the radial direction, just before a stagnation phase driven by a converging current sheet and a shock wave. The feasibility of optical guidance of a high-intensity (>1 x 10(17) W/cm(2)) Ti:sapphire laser pulse by use of this method over a distance of 2 cm, corresponding to 12.5 times the Rayleigh length, has been experimentally demonstrated. The guiding-channel formation process was directly probed with a He-Ne laser beam. The electron density in the fully ionized channel was estimated to be 2.0 x 10(17) cm(-3) on the axis and 7.0 x 10(17) cm(-3) on the peaks of the channel edge, with a diameter of 70 mum, as indicated by the experimental results, which were corroborated by a magnetohydrodynamics simulation.