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(一)前言 在常用的光阴极(Ag-O-Cs,Sb-Cs,Sb-K-Na-Cs)中,每一种光阴极均有其光谱响应曲线(工作波段)。各种光阴极的光谱响应曲线的形状各异,λ_阈(长波截止波长)也各异。但λ_短(短波起始波长)则取决于窗口玻璃材料对短波波长的透过率。总之,常用光阴极的光谱响应曲线随光阴极的材料而异,是无法预先设计的。
(I) Preface In the common photocathode (Ag-O-Cs, Sb-Cs, Sb-K-Na-Cs), each photocathode has its spectral response curve (working band). The spectral response curves of various photocathodes have different shapes, and the λ_threshold (long wavelength cutoff wavelength) also varies. But λ_ short (shortwave starting wavelength) depends on the transmittance of the window glass material to the short wavelength. In summary, the spectral response of common photocathodes varies with the photocathode material and can not be pre-designed.