激光等离子体3ω0/2散射光时空特性研究
STUDY ON TIME AND SPACE RESOLVED IMAGE OF 3ω0/2 LIGHT IN LASER PLASMA
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摘要: 给出了1. 06μm 激光照射金平面靶时激光等离子体的3ω0/2散射光时空谱的实验结果, 得到双等离子体衰变的弛豫时间, 以及等离子体冕区的膨胀速度, 并与理论计算的结果进行了对比, 证实了双等离子体衰变饱和机制理论的自洽。Abstract: The experimental measurement of the 3ω0/2 scattered light in plasmas which were produced by 1.06μs laser light irradiating gold disk targets is reported in the paper. The experiment results showed the emission of the 3ω0/2 light is obviously rippled and the breaking time between two emission is about 280ps, which is coincide with the calculation results from Two Plasmon Decay's saturation theory modeling. Also the average speed of the surface with 1/4 critical density moving to the opposite direction of the target nurmal is observed to be about 5. 0×107cm2.
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Key words:
- plasma /
- 3 ω0/2 scattered light /
- critcal density
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