透射式阴极X光二极管初步研究

侯立飞; 杜华冰; 车兴森; 李志超; 谢旭飞; 袁永腾; 韦敏习; 杨轶濛; 杨国洪; 刘慎业; 杨家敏

doi:doi:10.11884/hplpb201628.151128

强激光与粒子束, 2016, 28 (9): 092003, 网络出版: 2016-09-14

透射式阴极X光二极管初步研究

Initial development of X-ray diodes with transmission photocathode

论文大纲

侯立飞 ^*杜华冰车兴森李志超谢旭飞袁永腾韦敏习杨轶濛杨国洪刘慎业杨家敏

作者单位

中国工程物理研究院激光聚变研究中心, 四川绵阳 621900

X光二极管时间分辨透射阴极负偏压辐射流 X-ray diode time resolution transmit cathode negative bias voltage X-ray flux

摘要

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550 nm CH+50 nm 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-1500 V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3.01 ns, 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。

Abstract

Based on emission mode of transmit cathode and the principle of FXRD, a transmit cathode for XRD was designed and manufactured. A sample with a cathode made up of 550 nm CH and 50 nm Au was used for preliminary experiments on SG-Ⅲ prototype facility. Firstly the influence of direct X-ray was evaluated using an XRD with reflective cathode. The results show that the XRD with -1500 V bias voltage could eliminate the influence of X-ray arrived at the anode for XRD with transmission cathode. Then when main lasers and the ninth laser were operating on SG-Ⅲ prototype facility, the transmission cathode XRD with negative bias voltage captured normal signals. The results show that the second peak signal delay 3.01 ns by the first peak, which is in accord with the time sequence of main lasers and the ninth laser. The capability of temporal resolution can satisfy requirements of experiments.

参考文献

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侯立飞, 杜华冰, 车兴森, 李志超, 谢旭飞, 袁永腾, 韦敏习, 杨轶濛, 杨国洪, 刘慎业, 杨家敏. 透射式阴极X光二极管初步研究[J]. 强激光与粒子束, 2016, 28(9): 092003. Hou Lifei, Du Huabing, Che Xingsen, Li Zhichao, Xie Xufei, Yuan Yongteng, Wei Minxi, Yang Yimeng, Yang Guohong, Liu Shengye, Yang Jiamin. Initial development of X-ray diodes with transmission photocathode[J]. High Power Laser and Particle Beams, 2016, 28(9): 092003.

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