Laser-driven platform for generation and characterization of strong quasi-static magnetic fields
Laser-driven platform for generation and characterization of strong quasi-static magnetic fields
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DOI：
10.1088/1367-2630/17/8/083051
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发表时间：
2015-03
影响因子：
3.3
通讯作者：
J. Santos;M. Bailly-Grandvaux;L. Giuffrida;P. Forestier-Colleoni;S. Fujioka;Zhe Zhang;Ph. Korneev;Ph. Korneev;R. Bouillaud;S. Dorard;Dimitri Batani;M. Chevrot;J. Cross;R. Crowston;J. Dubois;J. Gazave;Gianluca Gregori;E. D'humieres;S. Hulin;K. Ishihara;S. Kojima;E. Loyez;J. Marquès;A. Morace;P. Nicolaï;O. Peyrusse;A. Poy'e;D. Raffestin;J. Ribolzi;Markus Roth;G. Schaumann;F. Serres;V. Tikhonchuk;Ph Vacar;N. Woolsey
中科院分区：
文献类型：
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作者：
J. Santos;M. Bailly-Grandvaux;L. Giuffrida;P. Forestier-Colleoni;S. Fujioka;Zhe Zhang;Ph. Korneev;Ph. Korneev;R. Bouillaud;S. Dorard;Dimitri Batani;M. Chevrot;J. Cross;R. Crowston;J. Dubois;J. Gazave;Gianluca Gregori;E. D'humieres;S. Hulin;K. Ishihara;S. Kojima;E. Loyez;J. Marquès;A. Morace;P. Nicolaï;O. Peyrusse;A. Poy'e;D. Raffestin;J. Ribolzi;Markus Roth;G. Schaumann;F. Serres;V. Tikhonchuk;Ph Vacar;N. Woolsey
在强激光脉冲（500 J，1 ns，10 17 W cm - 2？））具有不同材料的电容器线圈目标。可重复的磁场峰值和上升时间与激光脉冲持续时间一致，是通过GHz带宽电感拾取线圈（B点探针）的测量准确推断出来的。偏振光学激光的法拉第旋转和高能质子束的偏转测量的结果与靶充电早期阶段的B点探针测量结果一致，直至t ≈ 0.35？> ns，然后受到辐射和等离子体效应的干扰。该领域有一个偶极状分布超过1毫米3的特征体积，这是与理论预期一致。这些结果表明，激光能量转化为磁场的效率非常高，从而建立了一个强大的激光驱动平台，可再现，良好的特点，准静态磁场的产生在kT级，以及磁化和精确探测的高能量密度样品驱动的二次强大的激光或粒子束。
Quasi-static magnetic-fields up to 800 T are generated in the interaction of intense laser pulses (500 J, 1 ns, 10 17 W cm - 2 ?> ) with capacitor-coil targets of different materials. The reproducible magnetic-field peak and rise-time, consistent with the laser pulse duration, were accurately inferred from measurements with GHz-bandwidth inductor pickup coils (B-dot probes). Results from Faraday rotation of polarized optical laser light and deflectometry of energetic proton beams are consistent with the B-dot probe measurements at the early stages of the target charging, up to t ≈ 0.35 ?> ns, and then are disturbed by radiation and plasma effects. The field has a dipole-like distribution over a characteristic volume of 1 mm3, which is consistent with theoretical expectations. These results demonstrate a very efficient conversion of the laser energy into magnetic fields, thus establishing a robust laser-driven platform for reproducible, well characterized, generation of quasi-static magnetic fields at the kT-level, as well as for magnetization and accurate probing of high-energy-density samples driven by secondary powerful laser or particle beams.