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Ignition and burn propagation with suprathermal electron auxiliary heating

机译：超热电子辅助加热引起的点火和燃烧传播

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The rapid development in ultrahigh-intensity lasers has allowed the exploration of applying an auxiliary heating technique in inertial confinement fusion (ICF) research. It is hoped that, compared with the 'standard fast ignition' scheme, raising the temperature of a hot-spot over the ignition threshold based on the shock-heated temperature will greatly reduce the required output energy of an ignition ultrahigh-intensity pulse. One of the key issues in ICF auxiliary heating is: how can we transport the exogenous energy efficiently into the hot-spot of compressed DT fuel? A scheme is proposed with three phases. First, a partial-spherical-shell capsule, such as double-conical target, is imploded as in the conventional approach to inertial fusion to assemble a high-density fuel configuration with a hot-spot of temperature lower than the ignition threshold. Second, a hole is bored through the shell outside the hot-spot by suprathermal electron explosion boring. Finally, the fuel is ignited by suprathermal electrons produced in the high-intensity ignition laser-plasma interactions. Calculations with a simple hybrid model show that the new scheme can possibly lead to ignition and burn propagation with a total drive energy of a few tens of kilojoules and an output energy as low as hundreds of joules for a single ignition ultrahigh-intensity pulse. [References: 27]
机译：超高强度激光器的飞速发展使得人们可以在惯性约束聚变（ICF）研究中应用辅助加热技术。希望与“标准快速点火”方案相比，根据冲击加热的温度将热点温度提高到超过点火阈值，将大大减少点火超高强度脉冲所需的输出能量。 ICF辅助加热的关键问题之一是：我们如何才能将外源能量有效地输送到压缩DT燃料的热点中？提出了具有三个阶段的方案。首先，像惯性聚变的常规方法一样，将部分球形的胶囊（例如双锥靶）内爆，以组装热点温度低于点火阈值的高密度燃料配置。其次，通过超热电子爆炸钻孔在热点外部的外壳上钻一个孔。最终，燃料由高强度点火激光-等离子体相互作用中产生的超热电子点燃。用简单的混合模型进行的计算表明，新方案可能导致点火和燃烧传播，单个点火超高强度脉冲的总驱动能量只有几十千焦耳，输出能量低至数百焦耳。 [参考：27]

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