CAJ | 학술논문

研制了一套基于计算机控制的GaAs光电阴极智能激活系统,该系统可在计算机控制下严格按照标准工艺对GaAs光电阴极进行智能激活,并可在线测量阴极的光谱响应曲线.利用该系统分别进行了智能激活和人工激活实验,采集了激活过程中的光电流变化曲线,分析发现,和智能激活过程相比,由于人工激活过程出现了误操作,相邻光电流峰值间的差值下降很快,Cs、O交替的次数也较少.人工激活过程中Cs、O交替6次,光电流最大值为43μA,激活后GaAs光电阴极的积分灵敏度为796μA/lm.智能激活过程中Cs、O交替9次,光电流最大值为65μA,激活后GaAs光电阴极的积分灵敏度为1100μA/lm.
연제료일투기우계산궤공제적GaAs광전음겁지능격활계통,해계통가재계산궤공제하엄격안조표준공예대GaAs광전음겁진행지능격활,병가재선측량음겁적광보향응곡선.이용해계통분별진행료지능격활화인공격활실험,채집료격활과정중적광전류변화곡선,분석발현,화지능격활과정상비,유우인공격활과정출현료오조작,상린광전류봉치간적차치하강흔쾌,Cs、O교체적차수야교소.인공격활과정중Cs、O교체6차,광전류최대치위43μA,격활후GaAs광전음겁적적분령민도위796μA/lm.지능격활과정중Cs、O교체9차,광전류최대치위65μA,격활후GaAs광전음겁적적분령민도위1100μA/lm.
The computer-automated system has been successfully developed to intelligently activate the GaAs photocathode by the standardized activation technique and to evaluate in-situ the spectral response.The time evolutions of the photocurrent during both the manual activation and auto-activation with the system were compared.The comparisons show that the auto-activation outperforms the manual activation.In the manual-activation,the photocurrent increases more slowly,the peak photocurrent decreases faster,and the (Cs,O) alternation number is fewer as compared with the auto-activation,possibly because of some mis-operation.For instance,in manual activation of the GaAs photocathode,we observed the (Cs,O) alternation number of 6,a peak photocurrent of 43μA and an integrated sensitivity of 796μA/lm;whereas in auto-activation,the (Cs,O) alternation number of 9,a peak photocurrent of 65μA and an integrated sensitivity of 1100μA/lm.