无增益微通道板时空特性的模拟研究

深圳大学光电子器件与系统教育部/广东省重点实验室,广东深圳518060

X射线光学; 分幅相机; 无增益微通道板; 时间分辨率; 渡越时间弥散; 惯性约束聚变

Simulation on temporal and spatial characteristics for the non-gain microchannel plate
ZHANG Ke, CAI Houzhi, and LIU Jinyuan

Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, Guangdong Province, P.R.China

X-ray optics; framing camera; non-gain microchannel plate; temporal resolution; transit time spread; inertial confinement fusion

DOI: 10.3724/SP.J.1249.2018.05500

备注

为提高分幅相机的时间分辨率,采用无增益微通道板(microchannel plate, MCP)代替有增益MCP研制分幅相机.利用Monte Carlo方法对无增益MCP的时间分辨特性、渡越时间弥散及空间分辨特性进行了理论研究.结果表明,无增益MCP的时间分辨率随着选通脉冲宽度的减小而提高,无增益MCP中电子的渡越时间弥散小于有增益MCP的渡越时间弥散.无增益MCP变像管的空间分辨率优于有增益MCP变像管的空间分辨率.因而,无增益MCP可以减小电子的渡越时间弥散,获得更好的时间分辨率.

To improve the temporal resolution of the framing camera, a non-gain microchannel plate(MCP)instead of a gain MCP is used to study the framing camera. The temporal resolution, the transit time spread, and the spatial resolution of the non-gain MCP are simulated by using the Monte Carlo method. The simulated results show that the temporal resolution of the non-gain MCP increases with the decrease of the gating pulse width. And the transit time spread in the non-gain MCP is lower than that in the gain MCP. Furthermore, the spatial resolution in the non-gain MCP is better than that in the gain MCP. Therefore, the non-gain MCP could reduce the transit time spread, and obtain the better temporal resolution for the framing camera.

·