Energy exchange via multi-species streaming in laser-driven ion acceleration
Energy exchange via multi-species streaming in laser-driven ion acceleration
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DOI：
10.1088/0741-3335/59/1/014003
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发表时间：
2017-01-01
影响因子：
2.2
通讯作者：
McKenna, P.
中科院分区：
文献类型：
--
作者：
King, M.;Gray, R. J.;McKenna, P.
由于在超强激光脉冲与薄箔的相互作用中可能发生的复杂的电子动力学和多离子加速机制，多个带电粒子群可能在空间中以不同的动量分布重叠。在某些情况下，这可以驱动流不稳定性，如相对论布尼曼不稳定性和离子-离子声学不稳定性。这种不稳定性发生的可能性证明使用粒子在细胞模拟。它示出，如果一个人口的离子可以被加速，使它可以传播通过其他缓慢膨胀的离子人口，能量交换可以发生通过离子-离子声不稳定性。
Due to the complex electron dynamics and multiple ion acceleration mechanisms that can take place in the interaction of an ultra-intense laser pulse with a thin foil, it is possible for multiple charged particle populations to overlap in space with varying momentum distributions. In certain scenarios this can drive streaming instabilities such as the relativistic Buneman instability and the ion-ion acoustic instability. The potential for such instabilities to occur are demonstrated using particle-in-cell simulations. It is shown that if a population of ions can be accelerated such that it can propagate through other slowly expanding ion populations, energy exchange can occur via the ion-ion acoustic instability.