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Hydrodynamic simulations of integrated experiments planned for the OMEGA/OMEGA EP laser systems

机译：计划用于OMEGA / OMEGA EP激光系统的集成实验的流体动力学模拟

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Integrated fast-ignition experiments on the combined OMEGA/OMEGA EP laser systems have been simulated with the multidimensional hydrodynamic code DRACO. The OMEGA laser system provides up to 30 kJ of compression energy, and OMEGA EP will provide two short-pulse beams, each with energies up to 2.6 kJ. In the electron transport model included in DRACO, the relativistic electrons are introduced at the pole of a two-dimensional (2D) simulation and transported in a straight line toward the target core. The electron's energy is calculated from the laser irradiance using a semi-empirical formula. An OMEGA cryogenic DT target designed to reach a one-dimensional fuel pR of 0.5 g cm(-2) has been simulated in 2D, with and without non-uniformities, to assess the sensitivity to energy, timing, and irradiance of the Gaussian fast-ignitor beam. For the uniform case, the neutron yield is predicted to be in excess of 10(15) (compared to similar to 10(14) without an ignitor beam) over a synchronization range of similar to 80 ps. Implosions with the ignitor beam show little decrease in the neutron yield with increasing inner-ice non-uniformity, in contrast to implosions without the ignitor beam, which show a significant decrease in neutron yield with increasing non-uniformity.
机译：已使用多维流体力学代码DRACO对组合式OMEGA / OMEGA EP激光系统上的集成快速点火实验进行了仿真。 OMEGA激光系统提供高达30 kJ的压缩能量，而OMEGA EP将提供两束短脉冲光束，每束能量高达2.6 kJ。在DRACO中包含的电子传输模型中，相对论电子在二维（2D）模拟的极点引入，并沿直线向目标核传输。使用半经验公式根据激光辐照度计算电子能量。在二维情况下（有无不均匀性）模拟了旨在达到一维燃料pR为0.5 g cm（-2）的OMEGA低温DT目标，以评估对高斯快速能量，时间和辐照度的敏感性-点火器光束。对于均匀情况，预计在接近80 ps的同步范围内，中子产量将超过10（15）（与没有点火器束的情况下与10（14）相似）。与没有内燃不均匀性增加的爆燃相比，没有点火器内燃的爆燃显示中子产率几乎没有降低，而内燃不均匀性增加则导致中子产率降低。

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