Performance of Direct-Drive Cryogenic Targets on OMEGA
Performance of Direct-Drive Cryogenic Targets on OMEGA
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DOI：
10.1063/1.2856551
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发表时间：
2007-11
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直接驱动点火靶标设计的成功取决于两个问题：维持低水平主燃料绝热的能力和控制内爆过程中的不均匀增长。在omega激光系统上进行了一系列实验[T.R.Boehly，D.L.Brown，R.S.Craxton等，opt.交警。133,495(1997)]研究低绝热、高压缩低温燃料组件的物理学。对这些实验进行建模需要对壳层加热的所有来源进行准确的计算，包括冲击加热和超热电子预热。为了提高计算精度，在一维HELD程序中引入了非局部热传导模型。ρR>；200 mg/cm~2的高面密度低温燃料组件[T.C.Sangster，V.N.Goncharov，P.B.Radha等人，“直接驱动低温内爆中的高面密度燃料组件”，Phys.莱特牧师。(提交)]已经在欧米茄上实现，在设计中，使用热传导的非局部处理优化了电击定时。
The success of direct-drive-ignition target designs depends on two issues: the ability to maintain the main fuel adiabat at a low level and the control of the nonuniformity growth during the implosion. A series of experiments was performed on the OMEGA Laser System [T. R. Boehly, D. L. Brown, R. S. Craxton et al., Opt. Commun. 133, 495 (1997)] to study the physics of low-adiabat, high-compression cryogenic fuel assembly. Modeling these experiments requires an accurate account for all sources of shell heating, including shock heating and suprathermal electron preheat. To increase calculation accuracy, a nonlocal heat-transport model was implemented in the 1D hydrocode. High-areal-density cryogenic fuel assembly with ρR>200mg∕cm2 [T. C. Sangster, V. N. Goncharov, P. B. Radha et al., “High-areal-density fuel assembly in direct-drive cryogenic implosions,” Phys. Rev. Lett. (submitted)] has been achieved on OMEGA in designs where the shock timing was optimized using the nonlocal treatment of the heat conductio...