Guided propagation of extremely intense lasers in plasma via ion motion.,Physical Review E

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Guided propagation of extremely intense lasers in plasma via ion motion.
Physical Review E ( IF 2.2 ) Pub Date : 2020-01-01 , DOI: 10.1103/physreve.101.011201
Wei-Min Wang _{1,

2,

3} , Zheng-Ming Sheng _{2,

4,

5} , Thomas Wilson ₂ , Yu-Tong Li _{3,

6,

7} , Jie Zhang _{3,

4}

Affiliation

The upcoming 10-100 PW laser facilities may deliver laser pulses with unprecedented intensity of 10^{22}-10^{25}Wcm^{-2}. Such laser pulses interacting with ultrarelativistic electrons accelerated in plasma can trigger various nonlinear quantum electrodynamic processes. Usually, ion motion is expected to be ignorable since the laser intensities below 10^{25}Wcm^{-2} are underrelativistic for ions. Here, we find that ion motion becomes significant even with the intensity around 10^{22}Wcm^{-2} when electron cavitation is formed by the strong laser ponderomotive force. Due to the electron cavitation, guided laser propagation becomes impossible via usual plasma electron response to laser fields. However, we find that ion response to the laser fields may effectively guide laser propagation at such high intensity levels. The corresponding conditions of the required ion density distribution and laser power are presented and verified by three-dimensional particle-in-cell simulations.

中文翻译：

通过离子运动在等离子体中引导极强激光的传播。

即将到来的10-100 PW激光设备可以提供前所未有的10 ^ {22} -10 ^ {25} Wcm ^ {-2}强度的激光脉冲。此类激光脉冲与在等离子体中加速的超相对论电子相互作用会触发各种非线性量子电动力学过程。通常，由于低于10 ^ {25} Wcm ^ {-2}的激光强度相对于离子的相对论性不足，因此预期离子运动是可忽略的。在这里，我们发现，当通过强激光质动力形成电子空化时，即使在10 ^ {22} Wcm ^ {-2}附近的强度下，离子运动也变得很明显。由于电子的空化作用，通过常规的等离子体电子对激光场的响应，引导的激光传播变得不可能。但是，我们发现离子对激光场的响应可以有效地引导激光在如此高的强度水平下传播。

更新日期：2020-01-17

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