Radiation Hardness of Efratom M-100 Rubidium Frequency Standard

Thomas C. English, Henry Vorwerk, Norman J. Rudie

Abstract:	The effects of nuclear radiation on rubidium gas cell frequency standards and components are presented, including the results of recent tests where a continuously operating rubidium frequency standard (Efratom, Model M-100) was subjected to simultaneous neutron/gamma radiation. At the highest neutron fluence [7.5 x 1012 n/cm] and total dose [11 krad (Si)] tested, the unit operated satisfactorily; the total frequency change over the 21 hour test period due to all causes, including repeated retraction from and insertion into the reactor, was less than 1 x 10 10. The effects of combined neutron/gamma radiation on rubidium-frequency standard physics-package components were also studied, and the results are presented.
Published in:	Proceedings of the 14th Annual Precise Time and Time Interval Systems and Applications Meeting November 30 - 3, 1982 NASA Goddard Space Flight Center Greenbelt, Maryland
Pages:	547 - 575
Cite this article:	English, Thomas C., Vorwerk, Henry, Rudie, Norman J., "Radiation Hardness of Efratom M-100 Rubidium Frequency Standard," Proceedings of the 14th Annual Precise Time and Time Interval Systems and Applications Meeting, Greenbelt, Maryland, November 1982, pp. 547-575.
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