论文部分内容阅读
光电管的性能和寿命主要取决于光电阴极的质量,而管内气氛的优劣又是影响光电阴极质量的主要因素之一.这是因为一般光电管都具有人面积的活性表面,残余气体与光电阴极表面作用将会改变光电阴极的发射性能.例如,用少量的O_2对C_3—Sb光电阴极敏化将会大大提高光电阴极的光电灵敏度;而少量的H_2O污染S—20光电阴极表面将会永久性地损害其光电发射性能;残余Cs蒸汽的存在,还会引起Ag—O—Cs光电管性能的不稳定.
Photocell performance and life expectancy depends mainly on the quality of photocathode, and the merits of the tube atmosphere is one of the main factors affecting the quality of photocathode, which is because the general photocell has a human active area of the surface, the residual gas and photoelectric For example, sensitizing the C_3-Sb photocathode with a small amount of O_2 will greatly enhance the photoelectric sensitivity of the photocathode, while a small amount of H_2O contaminating the surface of the S-20 photocathode will permanently The damage of its photoemission performance; the presence of residual Cs vapor, but also cause instability of Ag-O-Cs photocell performance.