基于现役装置的冲击点火可行性概念研究

以冲击点火物理特性的研究为基础, 分析冲击点火对高功率激光驱动器的物理需求, 然后从总体层面概括给出基于现役装置(神光III等间接驱动中心点火高功率激光装置) 研究冲击点火面临的关键技术问题. 研究表明, 基于现役装置的冲击点火主要面临两个层面的问题, 首先是非均匀光路排布下实现均匀辐照的工程层面问题, 其次是在现役装置上高效实现冲击点火激光脉冲的激光技术层面问题. 通过研究 分别对两个层面的问题提出相应的解决思路, 为后续研究奠定基础.

Conceptual research on modifications of indirect drive laser facilities for shock ignition

Shock ignition is a new concept for assembling and igniting thermonuclear fuel, in which compressed fusion fuel is separately ignited by a strong convergent shock launched in the target at the end of compression phase by a final intense laser pulse. Because of compression and ignition decoupling, target implosion velocities are significantly lower than those required for conventional hotspot ignition. As a result, shock ignition has the advantages of a low ignition energy threshold, high gain and good hydrodynamic stability properties. It offers a possibility for a high gain inertial confinement fusion to be used as green energy in the future, and could be tested on the projecting indirect drive laser fusion facilities like Shenguang-III facility (SG-III) in China. In this paper, we present the requirements for laser system used for shock ignition, delineate the critical issues and describe the research and development program that must be performed in order to test the high gain shock ignition in the future term.