Laser ion acceleration by using the dynamic motion of a target
Laser ion acceleration by using the dynamic motion of a target
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DOI：
10.1063/1.4821031
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发表时间：
2013-09-01
影响因子：
2.2
通讯作者：
Morita, Toshimasa
中科院分区：
文献类型：
--
作者：
Morita, Toshimasa
利用细胞内三维粒子模拟，研究了用峰值强度为5 × 10(21) W/cm(2)的620 TW、18 J激光脉冲照射圆盘靶时的质子加速。研究表明，在双层靶层的第一层中，质子被有效地加速到高能，这是因为在这种材料中，第一层发生了强烈的不均匀膨胀，这是由库仑爆炸引起的。此外，第一层加速质子的大运动是由辐射压力主导的加速度产生的。这种膨胀和移动的离子云产生的时变电势有效地加速了质子。此外，使用最好的材料作为目标，可以产生能量为200兆电子伏的质子束，能量扩散为2%。(C) 2013 AIP出版有限责任公司
Proton acceleration by using a 620 TW, 18 J laser pulse of peak intensity of 5 x 10(21) W/cm(2) irradiating a disk target is examined using three-dimensional particle-in-cell simulations. It is shown that protons are accelerated efficiently to high energy for a "light" material in the first layer of a double-layer target, because a strongly inhomogeneous expansion of the first layer occurs by a Coulomb explosion within such a material. Moreover, a large movement of the first layer for the accelerated protons is produced by radiation-pressure-dominant acceleration. A time-varying electric potential produced by this expanding and moving ion cloud accelerates protons effectively. In addition, using the best material for the target, one can generate a proton beam with an energy of 200 MeV and an energy spread of 2%. (C) 2013 AIP Publishing LLC.