基于透射式阴极发射模型和平响应XRD原理,设计了透射式阴极,并制作550nm CH+50nm Au的阴极,并在神光Ⅲ原型装置上开展了初步验证实验。首先利用反射式XRD施加负偏压的实验开展直穿光影响评估,施加偏压为-1500V时,没有观测到探测信号,表明直穿光产生光电子得到了有效抑制。利用原型主激光与第九路激光打靶实验,施加负偏压的透射式XRD获得探测信号显示第二个峰值信号延后第一个信号3.01ns,该结果与第九路激光延迟时间一致,时间分辨能力满足实验要求。 Based on the transmissive cathode emission model and the principle of flat response XRD, a transmissive cathode was designed and a cathode of 550 nm CH + 50 nm Au was fabricated. A preliminary verification experiment was carried out on the SG prototype device. First of all, the effect of direct light-on was evaluated by the application of negative XRD. The detection signal was not observed when the bias voltage was -1500V, indicating that the direct-light generation of photoelectrons was effectively suppressed. The use of prototype laser and the ninth laser target experiment, the application of negative bias transmission XRD obtained detection signal shows the second peak signal delay after the first signal 3.01ns, the results of the ninth laser delay time consistent with the time Resolution ability to meet the experimental requirements.