Methods To Recover The Narrow Dicke Sub-Doppler Feature In Evacuated Wall-Coated Cells Without Restrictions On Cell Size

G. Robinson

Abstract:	The hyperfine resonance observed in evacuated wall-coated cells with dimensions (?2 (? is the hyperfine resonance wavelength) consists of a narrow Dicke sub-Doppler linewidth feature, the 'spike', superimposed on a broad pedestal. The hydrogen maser provides a classic example of this line shape. As cell size is increased, an effect unique to evacuated wall-coated cells occurs. Certain combinations of microwave field distribution and cell size result in a line shape having a pedestal with a small spike feature or only the broad pedestal with no spike. Such conditions are not appropriate for atomic frequency standard applications. This paper reviews the cause of the evacuated wall-coated cell lineshape and discusses methods to recover the narrow spike feature without restrictions on cell size. One example will be a cell with dimensions having equal volumes of exposure to opposite phases of the microwave magnetic field. The typical signal recovery technique would have no spike in this case. Potential application is especially appropriate for Rb or Cs evacuated wall-coated cells.
Published in:	Proceedings of the 16th Annual Precise Time and Time Interval Systems and Applications Meeting November 27 - 29, 1984 NASA Goddard Space Flight Center Greenbelt, Maryland
Pages:	81 - 89
Cite this article:	Robinson, G., "Methods To Recover The Narrow Dicke Sub-Doppler Feature In Evacuated Wall-Coated Cells Without Restrictions On Cell Size," Proceedings of the 16th Annual Precise Time and Time Interval Systems and Applications Meeting, Greenbelt, Maryland, November 1984, pp. 81-89.
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