Guiding of relativistic electron beams in dense matter by laser-driven magnetostatic fields.
Guiding of relativistic electron beams in dense matter by laser-driven magnetostatic fields.
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DOI：
10.1038/s41467-017-02641-7
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发表时间：
2018-01-09
影响因子：
16.6
通讯作者：
Zhang Z
中科院分区：
文献类型：
--
作者：
Bailly-Grandvaux M;Santos JJ;Bellei C;Forestier-Colleoni P;Fujioka S;Giuffrida L;Honrubia JJ;Batani D;Bouillaud R;Chevrot M;Cross JE;Crowston R;Dorard S;Dubois JL;Ehret M;Gregori G;Hulin S;Kojima S;Loyez E;Marquès JR;Morace A;Nicolaï P;Roth M;Sakata S;Schaumann G;Serres F;Servel J;Tikhonchuk VT;Woolsey N;Zhang Z
强激光与致密靶相互作用加速相对论电子束，其将部分激光能量传输到靶深度。然而，激光-等离子体相互作用固有的电子束的大发散度损害了整体激光-靶能量耦合效率。在这里，我们证明了一个有效的引导MeV的电子与约30毫安的电流在固体物质中获得通过施加一个激光驱动的纵向静磁场为600 T。在磁化条件下，60 μ m厚的靶后表面的传输能量密度和峰值背景电子温度上升了约5倍，这与基准模拟结果一致。通过致密物质的能量密度通量的这种改善为激光驱动的高能粒子和辐射的强源的进步铺平了道路，将物质推向极端温度，达到与行星或恒星科学相关的状态，这在实验室规模上还无法实现，并实现高增益激光驱动的热核聚变。激光驱动相对论电子束的能量传输在惯性约束核聚变、粒子加速等领域具有重要的应用价值。在这里，作者演示了相对论电子束在稠密等离子体中的引导与外部施加的高磁场。
Intense lasers interacting with dense targets accelerate relativistic electron beams, which transport part of the laser energy into the target depth. However, the overall laser-to-target energy coupling efficiency is impaired by the large divergence of the electron beam, intrinsic to the laser–plasma interaction. Here we demonstrate that an efficient guiding of MeV electrons with about 30 MA current in solid matter is obtained by imposing a laser-driven longitudinal magnetostatic field of 600 T. In the magnetized conditions the transported energy density and the peak background electron temperature at the 60-μm-thick target's rear surface rise by about a factor of five, as unfolded from benchmarked simulations. Such an improvement of energy-density flux through dense matter paves the ground for advances in laser-driven intense sources of energetic particles and radiation, driving matter to extreme temperatures, reaching states relevant for planetary or stellar science as yet inaccessible at the laboratory scale and achieving high-gain laser-driven thermonuclear fusion. Efficient energy transport by laser-driven relativistic electron beams is crucial in many applications including inertial confinement fusion, and particle acceleration. Here the authors demonstrate relativistic electron beam guiding in dense plasma with an externally imposed high magnetic field.
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