Title :
Cesium gettering by graphite and colloidal graphite (Aquadag) [atomic clocks]
Author :
Bhaskar, N.D. ; Kahla, C.M.
Author_Institution :
Aerospace Corp., Los Angeles, CA, USA
Abstract :
Cs gettering properties are investigated for colloidal graphites containing graphite particles suspended in various types of solvents (termed `primary vehicle´) and binders. The gettering performance is studied by measuring the Cs sticking coefficient on stainless steel surfaces coated with colloidal graphite. The colloids Electrodag 121, Electrodag 179 and Aquadag E are used. They all contain water as the primary vehicle with different binders (organic and inorganic). Out of the three, only Aquadag E shows any significant Cs gettering capability. The other two behave essentially like uncoated metal surfaces. The results together with possible reasons for this behavior are presented
Keywords :
atomic clocks; caesium; getters; graphite; measurement standards; vacuum techniques; Aquadag E; Cs; Cs beam tube clocks; Electrodag 121; Electrodag 179; atomic clocks; binders; colloidal graphite; gettering; graphite particles; primary vehicle; stainless steel surfaces; sticking coefficient; Atomic clocks; Chemistry; Coatings; Detectors; Gettering; Laboratories; Microscopy; Microwave ovens; Physics; Solids;
Conference_Titel :
Frequency Control Symposium, 1988., Proceedings of the 42nd Annual
Conference_Location :
Baltimore, MD
DOI :
10.1109/FREQ.1988.27648
