Symmetric Inertial Confinement Fusion Implosions at Ultra-High Laser Energies
Symmetric Inertial Confinement Fusion Implosions at Ultra-High Laser Energies
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DOI：
10.1126/science.1185634
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发表时间：
2010-03-05
期刊：
影响因子：
56.9
通讯作者：
Moses, E. I.
中科院分区：
文献类型：
--
作者：
Glenzer, S. H.;MacGowan, B. J.;Moses, E. I.
国家点火设施的间接驱动黑腔实验证明，在前所未有的0.7兆焦耳的激光驱动能量下，胶囊发生了对称的内爆。192束同时发射的激光加热点火模拟黑洞，辐射温度为330万开尔文，利用黑洞产生的软X射线压缩直径为1.8毫米的胶囊。空腔两端的自产生等离子体光学栅会调节空腔中的激光功率分布，从而产生对称的x射线驱动，从胶囊自辐射的形状可以推断出来。这些实验表明，该条件适合于压缩充氢氚胶囊，以实现实验室燃烧聚变等离子体和获得能量的目标。
Indirect-drive hohlraum experiments at the National Ignition Facility have demonstrated symmetric capsule implosions at unprecedented laser drive energies of 0.7 megajoule. One hundred and ninety-two simultaneously fired laser beams heat ignition-emulate hohlraums to radiation temperatures of 3.3 million kelvin, compressing 1.8-millimeter-diameter capsules by the soft x-rays produced by the hohlraum. Self-generated plasma optics gratings on either end of the hohlraum tune the laser power distribution in the hohlraum, which produces a symmetric x-ray drive as inferred from the shape of the capsule self-emission. These experiments indicate that the conditions are suitable for compressing deuterium-tritium-filled capsules, with the goal of achieving burning fusion plasmas and energy gain in the laboratory.