DT弹丸的打孔和用超强laser脉冲的快离子点火
Hole boring in a DT pellet and fast ion ignition with ultra-intense laser pulses
摘要：
最近实现的高强度短激光脉冲在其应用于非均匀过密等离子体中的钻孔和预压缩DT聚变靶中的点火方面开辟了新的前景。一个简单的分析模型和数值模拟表明，强度超过1022 W/cm 2的脉冲可以深入穿透到等离子体中作为一个有效的有质动力加速的离子在向前的方向。高达数百微米的穿透深度取决于激光能量密度，其必须超过几十GJ/cm 2。在通道底部加速的快离子效率超过20%，具有很高的方向性，可以将预压缩的靶芯加热到聚变条件。
英文摘要：
Recently achieved high intensities of short laser pulses open new prospects in their application to hole boring in inhomogeneous overdense plasmas and for ignition in precompressed DT fusion targets. A simple analytical model and numerical simulations demonstrate that pulses with intensities exceeding 1022 W/cm2 may penetrate deeply into the plasma as a result of efficient ponderomotive acceleration of ions in the forward direction. The penetration depth as big as hundreds of microns depends on the laser fluence, which has to exceed a few tens of GJ/cm2. The fast ions, accelerated at the bottom of the channel with an efficiency of more than 20%, show a high directionality and may heat the precompressed target core to fusion conditions.
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