激活台内透射式GaAs光电阴极的光谱响应特性研究

利用在线光谱响应技术，对透射式GaAs光电阴极在高温激活和低温激活后的光谱响应特性进行了测试，计算并比较了高温激活和低温激活后阴极的积分灵敏度和光谱响应特性参数.结果发现,与高温激活相比，低温激活后GaAs光电阴极的积分灵敏度提高了13％，低温激活后阴极的截止波长和峰值波长均向长波有微小偏移.将已获得的测试曲线与铟封后的三代像增强器的光谱响应曲线进行了比较，结果发现铟封前后的光谱响应曲线存在明显差异.

Spectral Response Performance of Transmission-mode GaAs Photocathode in Activation

The spectral response performance of transmission-mode GaAs photocathode after high- temperature activation and low-temperature activation was measured by the use of on-line spectral response measurement technology, and the integral sensitivity and spectral response performance parameters of the GaAs photocathode after high-temperature activation and low-temperature activation were compared. It was found that compared to high-temperature activation, the integral sensitivity after low-temperature activation increased 13%, and both the cut-off wavelength and peak wavelength had a slight move towards long-wave. The comparison of obtained on-line measurement curves and the spectral response curve of sealed third generation imaging intensifier was further made, and it was found that there was great difference between the spectral response curves before and after sealing.