Laboratory observation of ion acceleration via reflection off laser-produced magnetized collisionless shocks

Tang, Hui-bo; Yufei,; Hao, Dan; Hu, Guang-yue; Lu, Quan-ming; Ren, C.; A, Guo; Hu, Ping; Wang, Yulin; Xiang-bing, Wang; Zhang, Zhen-chi; Yuan, Peng; Liu, Wei; Hua-chong, Si,; Yu, Chunlei; Zhao, Jiayi; Wang, Jin-can; Zhang, Zhe; Yuan, Xiaohui; Yuan, Dawei; Xie, Zenghong; Xiong, Jie; Fang, Zhiheng; Xu, Jian-Zhong; Ju, Jing-Jing; Guoqiang,; Zhang, Bo; Zhu, Jianqiang; Shen, Baifei; Li, Ruxin; Xu, Zhizhan

doi:10.48550/arxiv.2211.03090

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“…The shock evolution in the simulation shows similar characteristics to our experimental results [31], including the shock Alfvén number (M 7 11 A = -in the experiment), the separation time between the shock and piston ( t 1 cp0 W ~), and the shock structure in figure 3 (obvious 'overshoot', 'ramp', 'foot', etc). Moreover, the energy spectrum of shock-accelerated ions in our simulation is also consistent with our experimental result, which shows a quasi-monoenergetic distribution at about twice the shock velocity [31]. The validity of our simulation is thus proven and we can discuss the details of ion dynamics in this kind of shock below.…”

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confidence: 76%

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Ion dynamics in laser-produced collisionless perpendicular shock: one-dimensional particle-in-cell simulation

Tang

Ren

et al. 2023

Plasma Sci. Technol.

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Recently, perpendicular shocks have been generated in laboratory experiments by the interaction between a laser-produced supersonic plasma flow and a magnetized ambient plasma. Here, we explore the ion dynamics and the formation of such kind of shock with a one-dimensional (1-D) particle-in-cell simulation model using achievable parameters for laser experiments. A small part of the ambient ions is first reflected by the laser-driven piston. These piston-reflected ions interact with the upstream plasma and form a shock then. By analyzing the contribution of the electric force and the Lorentz force during the reflection, shock-reflected ions are found to be accelerated by two different mechanisms: shock drift acceleration and shock surfing acceleration, where shock drift acceleration is the dominating one. Very few ions are reflected twice by the shock and accelerated to a large velocity, implying that a more energetic population of ions can be observed in future experiments.

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confidence: 76%

“…These parameters are similar to those applied in shocks produced by the Shengguang II laser facility [31].…”

mentioning

confidence: 74%

Ion dynamics in laser-produced collisionless perpendicular shock: one-dimensional particle-in-cell simulation

Tang

Ren

et al. 2023

Plasma Sci. Technol.

View full text Add to dashboard Cite

show abstract

Laboratory observation of ion acceleration via reflection off laser-produced magnetized collisionless shocks

Cited by 1 publication

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Ion dynamics in laser-produced collisionless perpendicular shock: one-dimensional particle-in-cell simulation

Ion dynamics in laser-produced collisionless perpendicular shock: one-dimensional particle-in-cell simulation

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