Dynamics of relativistic electrons propagating in a funnel-guided target
Dynamics of relativistic electrons propagating in a funnel-guided target
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DOI：
10.1063/1.3465905
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发表时间：
2010-08
影响因子：
2.2
通讯作者：
Changman Zhou;Xingang Wang;S. Ruan;S. Z. Wu;L. Chew;M. Yu;Xiantu He
中科院分区：
文献类型：
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作者：
Changman Zhou;Xingang Wang;S. Ruan;S. Z. Wu;L. Chew;M. Yu;Xiantu He
采用二维混合仿真方法研究了热电子在漏斗制导目标中的输运。由皮秒短脉冲激光与金箔相互作用产生的相对论性电子被漏斗引导到燃料的压缩核心区域。结果表明，当高能电子进入压缩核时，漏斗内外表面的界面磁场会发生变化，从而使快速电子在金漏斗中被有效引导到达致密核。有漏斗引导时，燃油加热比无漏斗时提高。这里的发现可能有助于设计更有效的快速点火方案，以及涉及目标中高能电子的传输和加热的其他应用。
Hot electron transport in a funnel-guided target is investigated using two-dimensional hybrid simulations. Relativistic electrons generated by a petawatt picosecond short-pulse laser interacting with a gold slab are guided by a funnel to the compressed core region of the fuel. It is shown that as the energetic electrons propagate into the compressed core, the interface magnetic fields in the inner and outer surfaces of the funnel can change sign so that the fast electrons are efficiently guided in the gold funnel to reach the dense core. It is also shown that with funnel guiding, fuel heating is enhanced compared to that without the funnel. The findings here may be useful in the design of more efficient fast-ignition schemes, as well as in other applications involving transport and heating of energetic electrons in targets.