Reduction of the photoelectron induced gas desorption in the PETRA vacuum system by in situ argon glow discharge cleaning Kouptsidis, J. Mathewson, A. G. 1976 - DESY EPflicht - frei zugänglich
A new approach to evaluate sputter-ion pump characteristics Hartwig, H. Kouptsidis, J. 1974 - DESY EPflicht - frei zugänglich