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

fYear

1988

Firstpage

510

Lastpage

513

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control Symposium, 1988., Proceedings of the 42nd Annual

Conference_Location

Baltimore, MD

Type

conf

DOI

10.1109/FREQ.1988.27648

Filename

27648