化学气相沉积金刚石探测器测量辐射驱动内爆的硬X射线

金刚石探测器具有响应快、灵敏度高、动态范围大、平响应、击穿电压高、抗辐射等优点, 广泛运用于X射线测量. 利用化学气相沉积方法制备的光学级金刚石, 采用金属-金刚石-金属结构研制了X射线金刚石探测器. 在8ps激光器上的探测器响应性能考核表明, 整个探测器系统的响应时间为444 ps, 上升时间为175 ps, 载流子寿命为285 ps. 将探测器应用于神光Ⅲ原型装置的内爆物理实验硬X射线测量, 分别测量得到以注入黑腔的激光转化为主和靶丸内爆产生为主的硬X射线能流, 测得的峰值信号分别正比于激光总能量和反比于靶丸CH层厚度. 关键词： CVD金刚石探测器 硬X射线 激光能量

Hard X-ray measurement for indirect-driven imploding by chemical vapor deposited diamond detectors

The diamond detector is used to diagnose X-ray and has the advantages of fast response, high sensitivity, large dynamic range, flat response, high breakdown field, and outstanding radiation hardness. The X-ray diamond detector with a metal-diamond-metal structur is developed, in which the optical grade diamond is synthesized by chemical vapor deposition (CVD) method. Through the calibration of response time on the pulse laser of 8 ps width, the full width at half maximum of the CVD diamond detector is 444 ps, the rise time of the detector is 175 ps, and the lifetime of the carrier is 285 ps. The detectors are used to measure the hard X-ray for the imploding experiment on SGIII-prototype equipment. The results indicate that the measured hard X-ray flux is produced mainly by laser and target imploding, and the peak signal is in direct proportion to the laser energy and in inverse proportion to the CH thickness of target.