CAJ | 학술논문

紫外-可见光抑制比是决定全天时紫外探测成像系统信噪比的一个重要参数。为了研究激活时Cs量对Cs2Te紫外光阴极紫外-可见光抑制比(S280 nm/S320 nm)的影响，利用三组不同Cs量的多次激活实验，通过分别对比紫外-可见光抑制比结果和200~400 nm的光谱响应曲线，得到不同Cs量激活的Cs2Te光阴极其紫外-可见光抑制比在4.0~7.6之间变化。随着Cs量的增大，紫外光阴极的积分灵敏度相应增长，主要体现在260~320 nm ，但峰值256 nm处的辐射灵敏度增长不明显。重点分析了激活时Cs量对大于320 nm波长范围光谱响应的影响。
자외-가견광억제비시결정전천시자외탐측성상계통신조비적일개중요삼수。위료연구격활시Cs량대Cs2Te자외광음겁자외-가견광억제비(S280 nm/S320 nm)적영향，이용삼조불동Cs량적다차격활실험，통과분별대비자외-가견광억제비결과화200~400 nm적광보향응곡선，득도불동Cs량격활적Cs2Te광음겁기자외-가견광억제비재4.0~7.6지간변화。수착Cs량적증대，자외광음겁적적분령민도상응증장，주요체현재260~320 nm ，단봉치256 nm처적복사령민도증장불명현。중점분석료격활시Cs량대대우320 nm파장범위광보향응적영향。
UV-visible rejection ratio is an important parameter for de termining SNR of all-day ultraviolet detector system. In order to study the effect of Cs sensitization on UV-visible rejection ratio S280 nm/S320 nm of Cs2Te ultraviolet photocathode during the activation, many activation experiments by using three different groups of Cs content were carried out. Respective comparing the results of UV-visible rejection ratio and the spectral response curves of 200-400 nm, the rejection ratio values of Cs2Te photocathodes activated with different Cs content varied from 4.0 to 7.6. As Cs content grew, the integral sensitivity of photocathodes increased correspondingly between 260 nm and 320 nm, while the growth of the radiation sensitivity at the peak of 256 nm was not remarkable. So this paper focused on the influence of Cs content on the spectral response whose wavelength was more than 320 nm.