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在神光III原型装置上利用8路6400 J/1 ns激光注入Φ1100μm×1850μm的黑腔内产生约200 e V的高温辐射场均匀辐照填充氘氘燃料的靶丸实现内爆.实验中,保持靶丸的内径一致,通过改变靶丸烧蚀层厚度的方式实现不同收缩比的内爆.通过闪烁体探测器、分幅相机等多套诊断设备获取了中子产额、X光bang-time(聚变反应产生X光时刻)、飞行轨迹、热斑形状等关键内爆参数.结合一维数值模拟表明:对于小收缩比内爆,受到非一维因素的影响小,其Y OC1D(实验测量中子产额与干净一维数值模拟计算结果之比)可以达到34%;对于中等收缩比内爆,受到非一维因素的影响显著,其Y OC1D仅仅为2.3%.
Implosion of deuterium-deuterium fuel-loaded pellets was achieved by using an 8-channel 6400 J / 1 ns laser injection into a black cavity with a diameter of 1100 μm × 1850 μm and a high temperature radiation field of about 200 eV on the SG prototype device. In the experiment, To maintain the same inner diameter of the capsule, and to achieve different contraction ratio implosions by changing the thickness of the ablation layer of the target capsule. The neutron yield was obtained from a plurality of diagnostic devices such as a scintillator detector and a fractional camera, and the X-ray bang- time (fusion reaction to generate X-ray time), flight path, hot spot shape and other key implosion parameters.Combined with the one-dimensional numerical simulation shows that for the small contraction ratio implosion, subject to non-dimensional factors, YOC1D (experimental measurement The ratio of neutron yield to clean one-dimensional numerical simulation results can be up to 34%. For medium-shrinkage implosion, it is significantly affected by non-one-dimensional factors with a YOC1D of only 2.3%.