...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Plasma physics and controlled fusion >Collisional effects on the electrostatic shock dynamics in thin-foil targets driven by an ultraintense short pulse laser
【24h】

Collisional effects on the electrostatic shock dynamics in thin-foil targets driven by an ultraintense short pulse laser

机译：超声短脉冲激光器驱动薄箔目标静电冲击动力学的碰撞影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We numerically investigate the impact of Coulomb collisions on the ion dynamics in high-Z, solid density caesium hydride and copper targets, irradiated by high-intensity (I approximate to 2-5x10(20) W cm(-2)), ultrashort (similar to 10 fs), circularly polarized laser pulses, using particle-in-cell simulations. Collisions significantly enhance electron heating, thereby strongly increasing the speed of a shock wave launched in the laser-plasma interaction. In the caesium hydride target, collisions between the two ion species heat the protons to similar to 100-1000 eV temperatures. However, in contrast to previous work (A E Turrellet al2015Nat. Commun.68905), this process happens in the upstream only, due to nearly total proton reflection. This difference is ascribed to distinct models used to treat collisions in dense/cold plasmas. In the case of a copper target, ion reflection can start as a self-amplifying process, bootstrapping itself. Afterwards, collisions between the reflected and upstream ions heat these two populations significantly. When increasing the pulse duration to 60 fs, the shock front more clearly decouples from the laser piston, and so can be studied without direct interference from the laser. The shock wave formed at early times exhibits properties typical of both hydrodynamic and electrostatic shocks, including ion reflection. At late times, the shock is seen to evolve into a hydrodynamic blast wave.
机译：在数值上研究了由高强度（I近似为2-5x10（20）W cm（-2）），超短（类似于10 FS），圆偏振激光脉冲，使用粒子内模拟。碰撞显着增强了电子加热，从而强烈增加激光等离子体相互作用中发射的冲击波的速度。在氢化铯靶中，两种离子物种之间的碰撞加热质子以类似于100-1000eV的温度。然而，与以前的工作相比（A e Turerellet Al2015Nat。68905），由于近乎全能的反射，这个过程仅发生在上游。这种差异归因于用于治疗密集/冷等离子体中的碰撞的不同模型。在铜目标的情况下，离子反射可以作为自放大过程，自动启动自身。然后，反射和上游离子之间的碰撞显着加热这两个群体。当将脉冲持续时间提高到60 fs时，冲击前沿更清楚地从激光活塞上脱离，因此可以在不直接干扰激光器的情况下进行研究。在早期形成的冲击波表现出典型的流体动力学和静电冲击的特性，包括离子反射。在延迟时，看到震动进化到流体动力爆发波。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号