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Buffer gas cooling and trapping of atoms with small magnetic moments

J. G. E. Harris·R. A. Michniak·S. V. Nguyen·W. Ketterle·J. M Doyle
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Abstract

Buffer gas cooling was extended to trap atoms with small magnetic moment (mu). For mu greater than or equal to 3mu_B, 1e12 atoms were buffer gas cooled, trapped, and thermally isolated in ultra high vacuum with roughly unit efficiency. For mu < 3mu_B, the fraction of atoms remaining after full thermal isolation was limited by two processes: wind from the rapid removal of the buffer gas and desorbing helium films. In our current apparatus we trap atoms with mu greater than or equal to 1.1mu_B, and thermally isolate atoms with mu greater than or equal to 2mu_B. Extrapolation of our results combined with simulations of the loss processes indicate that it is possible to trap and evaporatively cool mu = 1mu_B atoms using buffer gas cooling.

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J. G. E. Harris, R. A. Michniak, S. V. Nguyen, W. Ketterle, J. M Doyle. 2003-11-14. Buffer gas cooling and trapping of atoms with small magnetic moments. https://doi.org/10.1209/epl%2Fi2004-10059-y

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