Scaling of ion energies in the relativistic-induced transparency regime
Scaling of ion energies in the relativistic-induced transparency regime
复制标题
DOI：
10.1017/s0263034615000828
复制
发表时间：
2015
影响因子：
0.9
通讯作者：
D. Jung;B. Albright;L. Yin;D. Gautier;B. Dromey;R. Shah;S. Palaniyappan;S. Letzring;H. C. Wu;T. Shimada;Randall P. Johnson;D. Habs;M. Roth;J. Fernández;B. Hegelich
中科院分区：
文献类型：
--
作者：
D. Jung;B. Albright;L. Yin;D. Gautier;B. Dromey;R. Shah;S. Palaniyappan;S. Letzring;H. C. Wu;T. Shimada;Randall P. Johnson;D. Habs;M. Roth;J. Fernández;B. Hegelich
实验数据表明，当激光强度在9 × 1019 ~ 2 × 1021 W/cm2之间时，从纳米尺度目标上获得的碳C6+离子能量最大。当与二维细胞内粒子模拟相结合时，这些结果表明碳离子在归一化激光振幅a0（a0∝(√I)）下呈陡峭的线性缩放。结果与半解析模型一致，该模型允许人们计算最佳厚度和最大离子能量作为a0和激光脉冲持续时间τλ的函数在相对论诱导的透明制度下的离子加速。根据我们的研究结果，目前可用的激光系统可以获得超过100 MeV/amu的离子能量。
Experimental data are presented showing maximum carbon C6+ ion energies obtained from nm-scaled targets in the relativistic transparent regime for laser intensities between 9 × 1019 and 2 × 1021 W/cm2. When combined with two-dimensional particle-in-cell simulations, these results show a steep linear scaling for carbon ions with the normalized laser amplitude a0(a0∝(√I)). The results are in good agreement with a semi-analytic model that allows one to calculate the optimum thickness and the maximum ion energies as functions of a0 and the laser pulse duration τλ for ion acceleration in the relativistic-induced transparency regime. Following our results, ion energies exceeding 100 MeV/amu may be accessible with currently available laser systems.