A compact gate valve for UHV is described. The valve was designed to allow
isolation of the ion source volume of an ion gun used in a surface analysis
system. Therefore, filaments can be replaced without ultra-high vacuum los
s in the analysis chamber. Other applications for this valve are suggested.
The valve has been built inside a DN40CF flange. Operation of the valve is
done by a linear actuator. Differential pumping is possible with the use o
f a Tee in the actuator connection. The construction details are described
and the testing results are presented. (C) 2001 Elsevier Science Ltd. All r
ights reserved.