Abstract

The compression and burning of a fusion target ignited by a focused shock wave produced at the action of a time-profiled second harmonic laser pulse of a Nd laser have been calculated and theoretically studied. The main energy features of the shock ignition scheme have been considered. The use of the second harmonic radiation corresponds to a higher energy and a longer laser pulse necessary for ignition by this method compared to the use of the third harmonic radiation. Nevertheless, the method of ignition by the focused shock wave with the second harmonic radiation makes it possible to reach the fusion target gain that is two or three times higher than that at the traditional spark ignition with the laser pulse energy higher than in the former case by a factor of 1.5. The numerical calculations have been performed with one-dimensional hydrodynamic codes.

中文翻译：

---

会聚冲击波点燃激光聚变靶的特征

摘要

计算和理论研究了在Nd激光器的时间轮廓二次谐波激光脉冲作用下产生的聚焦冲击波点燃的聚变靶的压缩和燃烧。已经考虑了冲击点火方案的主要能量特征。与使用三次谐波辐射相比，使用二次谐波辐射对应于通过该方法点火所需的更高的能量和更长的激光脉冲。尽管如此，通过聚焦冲击波与二次谐波辐射的点火方法仍可以实现比传统火花点火高两倍或三倍的聚变目标增益，而激光脉冲能量要比前一种情况高。 1.5倍