理论估算并实验验证了在X射线脉冲激发下低温砷化镓的光学折射率调制特性。泵浦-探针实验表明，低温砷化镓中存在的高密度复合缺陷大大减小了载流子寿命，使超热电子的弛豫时间小于1×10^-12 s，载流子的复合时间小于 2×10^-12 s，折射率的扰动时间约为2×10^-12 s。通过理论分析，给出了自由载流子和俄歇效应对该弛豫过程的定量估算，与实验结果吻合较好。该研究表明低温生长砷化镓是一种有效的可用于单次瞬态皮秒时间分辨X射线探测的材料。

利用雪崩晶体管作为高速开关器件、根据并联充电、串联放电原理设计了一种串并联相结合的MARX电路，以该电路为基础设计了一种低抖动高压脉冲驱动源，并将其应用于紫外激光脉冲的电光开关削波系统。通过同步调节器调节高压驱动脉冲和激光电光系统的时间匹配度，获得了驱动电脉冲与电光开关耦合的最佳工作状态；对匹配过程中的电光开关工作状态以及激光脉冲压缩过程进行了分析和研究，当高压驱动电脉冲幅度为2 690 V，脉宽为7.9 ns时，可以将脉宽为7.1 ns的紫外激光脉冲压缩至2.1 ns，KDP晶体的透光率达到了92.2%，电光开关的效率达到了31.7％。

Time-resolved diagnosis of the transient process using X-ray frame cameras (XRCs) is an important means in inertial confinement fusion (ICF) experiments. The sensitivity of the photocathode is a key parameter of the entire camera system. This letter aims to raise the quantum efficiency (QE) of the photocathode. With the changes in the deposition parameters, such as deposit angle, thickness of the coating in the channel, and vacuum of evaporation, the QE results are different. After testing and theoretical calculation, we find that there is a best matching value among these parameters. When the coating parameter meet this best value, the gain of the XRC can be improved significantly.

High-speed dynamic spectrum data of transient detection has become the major means of access to transient information. However, in terms of the characteristic of spectral data excessiveness and transience in the dynamic spectral detection system, the linear charge-coupled device (CCD) used in the system should have real-time-output and match the high-speed data storage equipment. Based on the transient spectrum characteristic, we introduce a high-speed dynamic spectrum data acquisition system with a high-linear array CCD. Through the field of programming gate array, the system provides an accurate driving clock for CCD and generates the control signals for analog-to-digital (A/D) conversion, storage, and transmission. Finally, the collected data by the peripheral component interconnect bus are summarized and filtered in the host computer. The results show that the CCD can stably work with a 40-MHz clock, and the frame scanning frequency can achieve 73 KHz. This design can remarkably complete the real-time measurement of the denotation transient temperature and achieve high-speed spectral information collection and storage with high accuracy and frame scanning frequency. It can be applied to other transient information acquisition.

The detonation temperature is measured both theoretically and experimentally by means of a complementary metal oxide semiconductors (CMOS) image sensor. An experimental system of multiwavelength temperature measurement based on CMOS image sensing technology is designed and realized. The instant spectral information of each moment is captured by row with the CMOS image sensor, depending on the unique characteristic of its rolling shutter. With the use of multiwavelength temperature measurement theory and by fitting spectrum emissivity through the regressive least square method, the color temperature of the detonation whose temperature is variable can be obtained continuously. The system is calibrated by measuring the standard spectrum of the laser. In our system, four time temperatures are measured within 10-μs detonation. Results show that the system has a higher measuring accuracy and speed, and can be applied in high-speed spectral information collection and storage during the detonation.

The transit characteristics of gain electrons in the dynamic electric field in one micro-channel, the relation of the temporal resolution, and the gating electric pulse are discussed in detail. The simulation analyses provide guidance on how to select parameters of the gating electric pulse for designing the X-ray picosecond framing camera, based on micro-channel plates, especially with regard to the aspect of the temporal resolution of the camera. Certain experimental results are presented.

腔倒空技术是一种有效产生大能量、短脉冲激光输出的调Q技术，其产生的Q开关激光脉冲的宽度主要由谐振腔腔长决定。大孔径半绝缘GaAs光电导开关(PCSS)是一种可耐高压的光控开关，具有响应速度快、时间抖动小、耐压高、暗电阻大、导通电阻小等特点，将其直接作为控制腔倒空激光器的光反馈回路和高电压开关，在腔长为20 cm的氙灯抽运Nd:YAG电光调Q激光器上实现了激光波长1064 nm、单脉冲能量15 mJ、脉冲半峰全宽 （FWHM）为1.7 ns的腔倒空激光脉冲稳定输出，脉冲宽度峰峰值抖动优于7%，能量峰峰值抖动优于3%。