• [1]

    . LIU XueQue.Cathode Electronics(in Chinese) ,Beijing :Science Press,1957.69— 78(刘学悫 .阴极电子学 .北京 :科学出版社 ,1957.69— 78)2. Leung K N ,Pincosy P A ,Ehlers K W .Rev .Sci.Instrum .,1984 ,55(7) :1 0 64— 1 0 68 3. Goebe l D M ,Forrester A T ,Johnston S .Rev .Sci.Instrum .,1 980 ,51 (1 1 ) :1 4 68— 1 4 70 4. Tsai C C ,Menon M M ,Ryan P M et al.Rev.Sci.Instrum .,1 982 ,53(4) :41 7— 42 3