Features of the generation of a collisionless electrostatic shock wave in a laser-ablation plasma
Abstract
The appearance of a density bump is experimentally revealed in an electrostatic shock wave during the ablation of an aluminum foil by a femtosecond laser pulse. The numerical simulation shows that this phenomenon can be explained by the generation of a packet of ion acoustic waves under the action of high-energy electron flows in a collisionless plasma. It is found that, for the formation and maintenance of the dense plasma layer in the shock wave, the contributions of accelerated ions overtaking it and wave-captured ions of the background plasma formed by a nanosecond laser prepulse in the process of ablation are significant.
- Publication:
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Soviet Journal of Experimental and Theoretical Physics Letters
- Pub Date:
- February 2017
- DOI:
- 10.1134/S0021364017030067
- arXiv:
- arXiv:1607.02176
- Bibcode:
- 2017JETPL.105..164G
- Keywords:
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- Physics - Plasma Physics
- E-Print:
- 5 pages, 7 figures, submitted to JETPL