Energy transfer between laser beams crossing in ignition hohlraums
Energy transfer between laser beams crossing in ignition hohlraums
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DOI：
10.1063/1.3103788
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发表时间：
2009-04-01
影响因子：
2.2
通讯作者：
Suter, L. J.
中科院分区：
文献类型：
--
作者：
Michel, P.;Divol, L.;Suter, L. J.
提出了在等离子体中交叉的激光束之间的功率传输的全尺寸模型。开发了一种新模型，可以计算激光束对及其相关等离子体波在三维空间中的传播和耦合。对点火实验中使用的整套激光束平滑技术进行了建模，并研究了它们对交叉光束能量转移的影响。光束之间波长的变化可以使不稳定性进入或脱离共振，从而允许调整能量转移。研究了能量转移对有效光束指向和对称性的影响。对几种点火设计进行了分析和比较，表明光束锥之间高达 2 埃的波长偏移应足以控制点火实验中的能量传递。 (C) 2009 年美国物理研究所。 [DOI：10.1063/1.3103788]
The full scale modeling of power transfer between laser beams crossing in plasmas is presented. A new model was developed, allowing calculations of the propagation and coupling of pairs of laser beams with their associated plasma wave in three dimensions. The complete set of laser beam smoothing techniques used in ignition experiments is modeled and their effects on crossed-beam energy transfer are investigated. A shift in wavelength between the beams can move the instability in or out of resonance and hence allows tuning of the energy transfer. The effects of energy transfer on the effective beam pointing and on symmetry have been investigated. Several ignition designs have been analyzed and compared, indicating that a wavelength shift of up to 2 angstrom between cones of beams should be sufficient to control energy transfer in ignition experiments. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3103788]