强激光与粒子束, 2012, 24 (6): 1419, 网络出版: 2012-06-06
飞秒激光渡越辐射时间特性的实验研究
Time characteristic of transition radiation in femtosecond laser interaction with solid targets
飞秒激光 光辐射 光学条纹相机 渡越辐射 时间特性 femtosecond laser optical radiation optical streak camera transition radiation time characteristic
摘要
为了探索渡越辐射（TR）的时间特性，在100 TW掺钛蓝宝石飞秒激光器上利用光学条纹相机，在靶背表面法线方向测量了TR时间分辨成像光斑。实验测量结果显示：TR时间分辨成像光斑呈长条状，而辐射区域有发散角、有光强分布。 TR信号强而快，持续时间短，为ps量级，最先到达屏幕上。其他成分光辐射信号弱而慢，持续时间长，为ns量级，最后到达屏幕上。TR的时间特性能为鉴别和判断TR信号提供了新的依据。
Abstract
The time-resolved image of transition radiation(TR) was measured in the normal direction of the rear side of targets employing optical streak camera on the 100 TW femtosecond laser facility. The image features a strip shape, and the region of TR has a radiation angle and an optical intensity distribution. The TR intense is with a short duration of ps level, and other optical radiation is weak with a very long duration of ns level. The time-resolved characteristic above provides new evidence for the differentiation and estimation of TR.
王光昶, 马春生, 张建炜, 白春燕, 刘玉红, 郑志坚. 飞秒激光渡越辐射时间特性的实验研究[J]. 强激光与粒子束, 2012, 24(6): 1419. Wang Guangchang, Ma Chunsheng, Zhang Jianwei, Bai Chunyan, Liu Yuhong, Zheng Zhijian. Time characteristic of transition radiation in femtosecond laser interaction with solid targets[J]. High Power Laser and Particle Beams, 2012, 24(6): 1419.
PDF全文
