Laser plasma influence on the space-time structure of powerful laser radiation

9th International Conference on Modern Techniques of Plasma Diagnostics and their Application

Ananyin, O.B.^1 ; Bogdanov, G.S.^1 ; Vovchenko, E.D.^1 ; Gerasimov, I.A.^1 ; Kuznetsov, A.P.^1 ; Melekhov, A.P.^1

National Research Nuclear University MEPhI (MEPhl), Kashirskoe shosse 31, Moscow

115409, Russia^1

关键词: Laser plasma;    Low-density target;    Non-uniform radiations;    Powerful laser radiation;    Pulse energies;    Radiation field;    Spacetime structures;    Temporal profile;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/666/1/012036/pdf
DOI  :  10.1088/1742-6596/666/1/012036

来源: IOP

【 摘 要 】

This paper deals with the influence of laser plasma on the structure of the radiation field of a powerful Nd-glass laser with pulse energy up to 30 J and with the diameter of the output beam 45 mm. Laser plasma is generated by focusing the laser radiation on a low-density target such as nylon mesh and teflon or mylar films. Temporal profile of the laser pulse with a total duration of 25 ns consists of a several short pulse train. Duration of each pulse is about 2 ns. Notable smoothing of spatially non-uniform radiation structure was observed in the middle of the laser pulse.