Instruments and experimental techniques New York
|
1981年
/
24卷
/
5 pt 2期
关键词:
D O I:
暂无
中图分类号:
TN7 [基本电子电路];
学科分类号:
080902 ;
摘要:
A circuit is described for stabilizing the beam current of a field emission gun in an electron microscope operating with a carbon cathode at 1 mPa vacuum. The stabilizing makes it possible to reduce beam current fluctuations to 5%.