飞秒laser -物质相互作用产生非麦克斯韦等离子体的间接证据
Circumstantial evidence for a non-Maxwellian plasma from femtosecond laser-matter interaction
摘要：
利用中子能谱研究了激光等离子体相互作用中的离子加速机制。我们考虑了等离子体中不同类型的离子碰撞机制，这些机制导致了所观察到的中子谱的角各向异性。这些包括等离子体中的离子与靶中的离子之间的碰撞，以及热等离子体中的两个离子之间的碰撞。通过分析质子谱，我们认为，激光产生的等离子体由至少两个组件，其中一个集体加速，也可以产生各向异性的角分布的聚变中子。
英文摘要：
We study ion acceleration mechanisms in laser-plasma interactions using neutron spectroscopy. We consider different types of ion-collision mechanisms in the plasma, which cause the angular anisotropy of the observed neutron spectra. These include the collisions between an ion in the plasma and an ion in the target, and the collisions between two ions in the hot plasma. By analyzing the proton spectra, we suggest that the laser-generated plasma consists of at least two components, one of which collectively accelerated and can also produce anisotropy in the angular distribution of fusion neutrons.
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