Direct measurement of kilo-tesla level magnetic field generated with laser-driven capacitor-coil target by proton deflectometry
Direct measurement of kilo-tesla level magnetic field generated with laser-driven capacitor-coil target by proton deflectometry
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DOI：
10.1063/1.4943078
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发表时间：
2016-02-29
影响因子：
4
通讯作者：
Azechi, H.
中科院分区：
文献类型：
--
作者：
Law, K. F. F.;Bailly-Grandvaux, M.;Azechi, H.
在适当的等离子体屏蔽下，用质子偏转仪测量了由强激光驱动的电容线圈靶产生的千特斯拉水平准静态磁场(B场)。质子偏转仪是一种直接而可靠的方法来诊断强的毫米(3)尺度激光产生的B场；然而，在以前的实验中，这种方法并不成功。靶法向鞘加速的质子束在激光产生的磁场中被洛伦兹力偏转，所产生的偏转图案记录在辐射变色薄膜堆栈上。通过将实验质子谱与蒙特卡罗计算进行比较，得到了610+/-630T的B场振幅。用差磁探头测量了激光产生的B场的幅度和时间演化，独立地证实了质子偏转仪的测量结果。(C)2016 AIP出版有限责任公司。
A kilo-tesla level, quasi-static magnetic field (B-field), which is generated with an intense laser-driven capacitor-coil target, was measured by proton deflectometry with a proper plasma shielding. Proton deflectometry is a direct and reliable method to diagnose strong, mm(3)-scale laser-produced B-field; however, this was not successful in the previous experiment. A target-normal-sheath-accelerated proton beam is deflected by Lorentz force in the laser-produced magnetic field with the resulting deflection pattern recorded on a radiochromic film stack. A 610 +/- 630 T of B-field amplitude was inferred by comparing the experimental proton pattern with Monte-Carlo calculations. The amplitude and temporal evolutions of the laser-generated B-field were also measured by a differential magnetic probe, independently confirming the proton deflectometry measurement results. (C) 2016 AIP Publishing LLC.