Optical Frequency Standard in Trapped Atomic Hydrogen

Abstract

Our goal to improve the effectiveness of atom cooling by using radio-frequency evaporation was met early in the grant period, and we obtained temperatures and densities close to those needed for Bose-Einstein condensation. Consequently, we deferred our work on high resolution optical spectroscopy of hydrogen while we pursued BEC. We obtained BEC last June, using new spectroscopic methods to identify the onset of the transition and to characterize the condensate. Briefly, we found that the mean field interaction at high densities measurably shifts the 1S-2S spectral line, and that the frequency shift can be used to measure the density in situ. From the point of creating an optical frequency standard, it is essential to know this frequency shift, since the density must be kept sufficiently low that the shift is not a source of error.

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Document Details

Document Type
Technical Report
Publication Date
Apr 30, 1999
Accession Number
ADA362776

Entities

People

  • Daniel Kleppner

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Bose Einstein Condensates
  • Frequency
  • Frequency Shift
  • Frequency Standards
  • High Density
  • High Resolution
  • Hydrogen
  • Military Research
  • Radio Frequency
  • Spectral Lines
  • Spectroscopy
  • Standards
  • Technical Information Centers
  • Transitions

Fields of Study

  • Physics

Readers

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