Shapes of Storage Bulbs for Hydrogen Masers for Maximum Filling Factor

  • J. E. B. Ponsonby
Conference paper


The shape of the starage bulb in the H-maser cavity determines the value of the filling factor η’ defined as
$$ \eta = \frac{{\left\langle {{H_Z}} \right\rangle _B^Z \bullet _B^V}}{{{{\left\langle {{H^2}} \right\rangle }_C} \bullet _C^V}} $$
Where symbols have their usual meanings and the z direction is that of the static bias field.


  1. 1.
    C. Audoin, J.Viennet and P.Lesage. Hydrogen maser: Active or Passive? Troisieme Symposium sur les Etalons de Frequence et la Metrologie.Google Scholar

Copyright information

© Springer-Verlag Berlin, Heidelberg 1989

Authors and Affiliations

  • J. E. B. Ponsonby
    • 1
  1. 1.University of Manchester, N.R.A.L.CheshireUK

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