Magnetic Shielding and Vacuum Test for Passive Hydrogen Masers

D.U. Gubser, S.A. Wolf, A.B. Jacoby, L.D. Jones

Abstract:	Vibration tests on high permeability magnetic shields used in the SAO-NRL Advanced Development Model (ADM) hydrogen maser have been made. Magnetic shielding factors were measured before and after vibration at the Goddard Space Flight Center, magnetic field facility. Preliminary results indicate considerable (< 25%) degradation. Test results on the NRL designed vacuum pumping station for the ADM hydrogen maser are also discussed. This system employs sintered zirconium carbon getter pumps, supplied by SAES Getters, to pump hydrogen plus small ion pumps to pump the inert gases. In situ activation tests and pumping characteristics indicate that the system can meet design specifications.
Published in:	Proceedings of the 13th Annual Precise Time and Time Interval Systems and Applications Meeting December 1 - 3, 1981 Naval Research Laboratory Washington, DC
Pages:	791 - 799
Cite this article:	Gubser, D.U., Wolf, S.A., Jacoby, A.B., Jones, L.D., "Magnetic Shielding and Vacuum Test for Passive Hydrogen Masers," Proceedings of the 13th Annual Precise Time and Time Interval Systems and Applications Meeting, Washington, DC, December 1981, pp. 791-799.
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