测量了１．０５３μｍ激光照射金平面靶时产生的３ω０／２谐波散射光的时间积分谱，由红移峰和蓝移峰的波长推算出双等离子体衰变区域的电子温度以及ｎｃ／４区域的等离子体膨胀速度，即离子声速。实验结果和不稳定性饱和机制预言的结果有良好的自洽性。 The time integral spectra of 3ω0 / 2 harmonic scattered light generated when a 1.053μm laser irradiates a gold planar target were measured. From the redshift peak and the blue shifted peak wavelength, the electronic temperature of the double plasma decay region and the nc / 4 region The plasma expansion rate, that ion velocity. Experimental results and instability saturation mechanism prediction results have a good self-consistency.