GeV laser ion acceleration from ultrathin targets: The laser break-out afterburner
GeV laser ion acceleration from ultrathin targets: The laser break-out afterburner
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DOI：
10.1017/s0263034606060459
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发表时间：
2006-06
影响因子：
0.9
通讯作者：
L. Yin;B. Albright;B. Hegelich;Juan C Fernández
中科院分区：
文献类型：
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作者：
L. Yin;B. Albright;B. Hegelich;Juan C Fernández
利用粒子模拟方法研究了一种新的激光驱动离子加速机制。这种机制允许离子加速到GeV的能量大大降低激光强度相比，早期的加速计划。新机制，被称为“激光爆发加力燃烧室”（BOA），使碳离子加速到大于2 GeV的能量，激光强度只有10 21 W/cm 2，强度已实现在现有的激光系统。文献中用于获得这些能量的其它技术依赖于10 24 W/cm 2或以上的强度，即，2-3比迄今为止已经证明的任何激光强度都高几个数量级。此外，BOA机制获得更高的能量和效率比目标正常鞘层加速（TNSA），其中的标度定律预测碳能量为50 MeV/u相同的激光条件。在BOA的早期阶段，碳离子作为准单能束加速，其中值能量高于最近实验上实现的。
A new laser-driven ion acceleration mechanism has been identified using particle-in-cell (PIC) simulations. This mechanism allows ion acceleration to GeV energies at vastly reduced laser intensities compared with earlier acceleration schemes. The new mechanism, dubbed “Laser Break-out Afterburner” (BOA), enables the acceleration of carbon ions to greater than 2 GeV energy at a laser intensity of only 10 21 W/cm 2 , an intensity that has been realized in existing laser systems. Other techniques for achieving these energies in the literature rely upon intensities of 10 24 W/cm 2 or above, i.e., 2–3 orders of magnitude higher than any laser intensity that has been demonstrated to date. Also, the BOA mechanism attains higher energy and efficiency than target normal sheath acceleration (TNSA), where the scaling laws predict carbon energies of 50 MeV/u for identical laser conditions. In the early stages of the BOA, the carbon ions accelerate as a quasi-monoenergetic bunch with median energy higher than that realized recently experimentally.