Laser-driven strong magnetostatic fields with applications to charged beam transport and magnetized high energy-density physics-猫眼课题宝

DOI：

10.1063/1.5018735

发表时间：

2017-10

期刊：

arXiv: Plasma Physics

影响因子：

通讯作者：

中科院分区：

其他

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作者：

J. Santos;M. Bailly-Grandvaux;M. Bailly-Grandvaux;M. Ehret;M. Ehret;A. Arefiev;D. Batani;F. Beg;A. Calisti;S. Ferri;R. Florido;P. Forestier-Colleoni;P. Forestier-Colleoni;S. Fujioka;M. Gigosos;L. Giuffrida;L. Gremillet;J. Honrubia;S. Kojima;Ph. Korneev;Ph. Korneev;K. Law;J. Marquès;A. Morace;C. Moss'e;O. Peyrusse;S. Rose;Markus Roth;S. Sakata;G. Schaumann;F. Suzuki-Vidal;V. Tikhonchuk;T. Toncian;N. Woolsey;Zhe Zhang

强激光等离子体过程中产生的线圈靶放电电流的几个$100\，$kA，产生的静磁场（B场）超过$0.5\，$kT。准静态电流由激光辐照表面的热电子喷射提供。根据我们的模型，定性地描述了放电电流的演变，主要的控制参数是激光辐照度$I_{las}}\lambda_{las}}^2$。的B-场的时空演化的实验特征在于高频带宽的B-点探针和质子偏转测量。ns级的磁脉冲足够长，可以通过电阻扩散磁化次级靶。我们应用它在实验中的激光产生的相对论电子输运到固体电介质目标，产生前所未有的5倍增强的能量密度通量在60\，\mathrm{\mu m}$深度，相比非磁化的运输条件。这些研究为磁化高能量密度物理学研究铺平了道路，这些研究涉及激光产生的次级辐射源和/或高能粒子及其传输、高增益聚变能源计划和实验室天体物理学。

Powerful laser-plasma processes are explored to generate discharge currents of a few $100\,$kA in coil targets, yielding magnetostatic fields (B-fields) in excess of $0.5\,$kT. The quasi-static currents are provided from hot electron ejection from the laser-irradiated surface. According to our model, describing qualitatively the evolution of the discharge current, the major control parameter is the laser irradiance $I_{\mathrm{las}}\lambda_{\mathrm{las}}^2$. The space-time evolution of the B-fields is experimentally characterized by high-frequency bandwidth B-dot probes and by proton-deflectometry measurements. The magnetic pulses, of ns-scale, are long enough to magnetize secondary targets through resistive diffusion. We applied it in experiments of laser-generated relativistic electron transport into solid dielectric targets, yielding an unprecedented 5-fold enhancement of the energy-density flux at $60 \,\mathrm{\mu m}$ depth, compared to unmagnetized transport conditions. These studies pave the ground for magnetized high-energy density physics investigations, related to laser-generated secondary sources of radiation and/or high-energy particles and their transport, to high-gain fusion energy schemes and to laboratory astrophysics.

Laser-driven strong magnetostatic fields with applications to charged beam transport and magnetized high energy-density physics

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