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总结了在神光Ⅲ原型激光装置上开展的一系列黑腔物理实验研究,从多个方面研究了黑腔内部等离子体状态和辐射场特性。用真空黑腔能量学研究获得了散射光、辐射温度和不同能段辐射流份额的定标规律,从能量学角度梳理和分析了整个激光黑腔相互作用过程。通过对黑腔中充入低密度低Z气体抑制了腔壁等离子体运动,明显减少了可能造成靶丸预热的金M带辐射流(1.6~4.4keV)份额。针对黑腔内部不同区域等离子体,研究了光斑区等离子体的运动,分析了其与电子热传导限流因子的关系;研究了冕区等离子体的运动,分析了不同充气等离子体条件对其的影响;在同一发次实验中同时测量了光斑区与再发射区的辐射流比值。
In this paper, a series of black cavity physics experiments carried out on the prototype SG laser were summarized, and the plasma state and radiation field inside the black cavity were studied in many aspects. Scattering light, radiation temperature and fractional radiative flux fractionation were obtained by using the study of vacuum black cavity energies. The interaction of the whole black cavity was analyzed and analyzed from the energy point of view. By filling the black cavity with low density and low Z gas, the cavity plasmonic motion is suppressed and the fraction of gold M band radiation (1.6-4.4 keV), which may cause the preheating of the target, is obviously reduced. Aiming at the plasma in different regions of the black cavity, the movement of the plasma in the spot region was studied and the relationship between the plasma current and the current limiting factor was analyzed. The movement of the plasma in the coronal region was studied and the influence of different conditions of the plasma on the plasma was analyzed In the same hair experiment, the ratio of radiation flux in the spot area to the re-emitting area was measured simultaneously.