“聚龙一号”丝阵实验轴向一维X光辐射功率分布

Axial 1-D X-ray power distribution of wire-array implosions on JL-Ⅰ

通过一维条纹相机诊断系统对"聚龙一号"(JL-Ⅰ)四类单层丝阵负载进行了轴向X光辐射测量。由于瑞利-泰勒不稳定性的影响,大部分负载表现出两端发光比中间滞后、阳极端发光比阴极端滞后、阳极端发光总强度弱于阴极端的现象。通过不同类型丝阵对比,对于20mm直径的丝阵,JL-Ⅰ驱动器的匹配负载线质量在0.9mg/cm附近。轴向辐射同步性与辐射功率之间存在相关性。

Axial X-ray radiations of four types of wire-arrays were diagnosed via 1-D streak camera system on JL- I . Because of the influence of Rayleigh-Taylor instability, wire-arrays mostly had the behavior that X-ray rose up later near both cathode and anode than that of the middle, X-ray near anode rose up later than that of cathode and the intensity of X-ray close to anode seemed weaker than that of cathode. With the comparison of different types of wire-arrays, the optimized mass per unit length of a 20 mm diameter wire-array on JL- I was about 0.9 mg/cm. Further, there was a correlation between axial radiation synchronization and radiation power.