Detailed study of nuclear fusion from femtosecond laser-driven explosions of deuterium clusters
Detailed study of nuclear fusion from femtosecond laser-driven explosions of deuterium clusters
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DOI：
10.1063/1.1487382
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发表时间：
2002-07-01
影响因子：
2.2
通讯作者：
Ditmire, T
中科院分区：
文献类型：
--
作者：
Zweiback, J;Cowan, TE;Ditmire, T
最近关于强超快脉冲与大的货车德瓦尔斯键合团簇相互作用的实验表明，这些团簇可以爆炸，具有足够的动能来驱动核聚变。用35 fs的激光脉冲辐照氘团簇，发现聚变中子产额强烈地依赖于团簇尺寸、激光聚焦几何形状和氘气射流参数等因素。当脉冲穿过气体羽流时，中子产额受到激光传播效应的限制。从实验中可以详细了解激光如何沉积能量并加热氘团簇等离子体。实验与模拟进行了比较。(C)2002年美国物理学会。
Recent experiments on the interaction of intense, ultrafast pulses with large van der Waals bonded clusters have shown that these clusters can explode with sufficient kinetic energy to drive nuclear fusion. Irradiating deuterium clusters with a 35 fs laser pulse, it is found that the fusion neutron yield is strongly dependent on such factors as cluster size, laser focal geometry, and deuterium gas jet parameters. Neutron yield is shown to be limited by laser propagation effects as the pulse traverses the gas plume. From the experiments it is possible to get a detailed understanding of how the laser deposits its energy and heats the deuterium cluster plasma. The experiments are compared with simulations. (C) 2002 American Institute of Physics.