Bakeout controller for the use of helium closed-cycle refrigerators in ultrahigh vacuum applications

摘要

imple control electronics are described which provide automated bakeout of an ultrahigh vacuum (UHV) chamber equipped with a helium closed-cycle refrigerator. By preventing the refrigerator from reaching elevated temperatures (T>50 °C) during bakeout, these devices can be utilized in the ultrahigh vacuum environment.