神光Ⅲ原型1ns激光驱动黑腔辐射温度实验研究

Experimental study of radiation temperature for gold hohlraum heated with 1ns,0.35μm lasers on SG-Ⅲ prototype laser facility

在神光Ⅲ原型装置上,利用八束三倍频激光注入金柱腔靶,开展了光学高温计与软X射线能谱仪测量辐射温度的比对研究;利用功率平衡关系式,分析了神光Ⅲ原型1ns内爆标准腔、1ns输运腔的辐射温度与激光功率的关系,得到了两种腔靶X射线转换效率(耦合效率)约为50%—55%.

Experimental measurement of radiation temperature by a streaked optical pyrometer and a soft X-ray spectrometer viewing through the laser entrance hole are performed on SG- Ⅲ prototype laser facility. It was found that the two methods compares well. Using the power balance relation,the laser-hohlraum coupling efficiency for 41.0 mm × 1.7 mm hohlraum and 41.0 mm × 2.1 mm hohlraum is around 50%-55 % .