CAJ | 학술논문

　　针对SBA/UBA光电阴极和中国科学院高能物理研究所380～510 nm转换波长的闪烁体，分别从 K2CsSb 光电阴极第一性原理、结构优化、以及材料生长机理与测控技术等方面进行研究。第一性原理计算结果表明，双碱光电阴极 K1.75CsSb1.25是直接禁带半导体，能带弯曲最大，功函数最小；中微子与闪烁体相互作用后发射光子的光谱范围在380～510 nm，可以确定双碱阴极透射式工作范围在2.92～3.26 eV，反射式工作范围在2.43～2.92 eV；针对球形光电倍增管结构，提出了透射式与反射式阴极量子效率最大化方案和K1.75CsSb1.25阴极6点监控制备方法，给出了测试方法。
　　침대SBA/UBA광전음겁화중국과학원고능물리연구소380～510 nm전환파장적섬삭체，분별종 K2CsSb 광전음겁제일성원리、결구우화、이급재료생장궤리여측공기술등방면진행연구。제일성원리계산결과표명，쌍감광전음겁 K1.75CsSb1.25시직접금대반도체，능대만곡최대，공함수최소；중미자여섬삭체상호작용후발사광자적광보범위재380～510 nm，가이학정쌍감음겁투사식공작범위재2.92～3.26 eV，반사식공작범위재2.43～2.92 eV；침대구형광전배증관결구，제출료투사식여반사식음겁양자효솔최대화방안화K1.75CsSb1.25음겁6점감공제비방법，급출료측시방법。
K2CsSb photocathode were studied from first principle, structure optimization, as well as the material growth mechanism and control technology etc., for SBA/UBA photocathode and scintillator of 380-510 nm wavelength conversion of High Energy Physics Institute of the Chinese Academy of Sciences. The first principle calculation results show that the double alkali photocathode K1.75CsSb1.25 is a direct band gap semiconductor, has maximum band bending and minimum work function. According to the spectral range of emission photon on interact neutrino with scintillator, we can determine the double alkali cathode transmission-mode works in the range of 2.92-3.26 eV, reflecting-mode works in 2.43-2.92 eV. Based on the spherical photomultiplier tube structure, we present scheme of maximizing quantum efficiency of the transmission and reflection cathode and K1.75CsSb1.25 cathode 6 points monitoring preparation method. And the testing method is given.