Physical Review A

Trap for polarized atoms based on light-induced drift

F. Buřič, Č. Hradečný, J. Slovák, T. Těthal, I. M. Yermolaev

Published Oct 1, 1996• 5 citations

Abstract

A polarization of sodium atoms in a simple trap based on the light-induced drift effect is reported. A sapphire capillary with one side closed and heated up to high temperature was used as the trap. The capacity of the trap is about 5\ifmmode\times\else\texttimes\fi{}${10}^{11}$ atoms. The achieved polarization of trapped atoms in the gas phase is about 90%. The full polarization of atoms in the trap is estimated at 25% at the temperature of 1400 \ifmmode^\circ\else\textdegree\fi{}C. The adsorption energy of sodium atoms on a sapphire surface is determined to be 2.5 eV. \textcopyright{} 1996 The American Physical Society.

DOI: 10.1103/physreva.54.3250

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Physical Review A

Trap for polarized atoms based on light-induced drift

F. Buřič, Č. Hradečný, J. Slovák, T. Těthal, I. M. Yermolaev

Published Oct 1, 1996• 5 citations

Publisher

Abstract

{10}^{11}

atoms. The achieved polarization of trapped atoms in the gas phase is about 90%. The full polarization of atoms in the trap is estimated at 25% at the temperature of 1400 \ifmmode^\circ\else\textdegree\fi{}C. The adsorption energy of sodium atoms on a sapphire surface is determined to be 2.5 eV. \textcopyright{} 1996 The American Physical Society.

DOI: 10.1103/physreva.54.3250

Related papers

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We report studies of photon-stimulated desorption, also known as light-induced atomic desorption, of sodium atoms from a vacuum-cell glass surface used for loading a magneto-optical trap (MOT). Fluorescence detection was used to record the trapped atom number and the desorption rate. We observed a steep wavelength dependence of the desorption process above $2.6 \mathrm{eV}$ photon energy, a result significant for estimations of sodium vapor density in the lunar atmosphere. Our data fit well to a simple model for the loading of the MOT dependent only on the sodium desorption rate and residual gas density. Up to $3.7\ifmmode\times\else\texttimes\fi{}{10}^{7}$ Na atoms were confined under ultrahigh-vacuum conditions, creating promising loading conditions for a vapor-cell-based atomic Bose-Einstein condensate of sodium.We report studies of photon-stimulated desorption, also known as light-induced atomic desorption, of sodium atoms from a vacuum-cell glass surface used for loading a magneto-optical trap (MOT). Fluorescence detection was used to record the trapped atom number and the desorption rate. We observed a steep wavelength dependence of the desorption process above $2.6 \mathrm{eV}$ photon energy, a result significant for estimations of sodium vapor density in the lunar atmosphere. Our data fit well to a simple model for the loading of the MOT dependent only on the sodium desorption rate and residual gas density. Up to $3.7\ifmmode\times\else\texttimes\fi{}{10}^{7}$ Na atoms were confined under ultrahigh-vacuum conditions, creating promising loading conditions for a vapor-cell-based atomic Bose-Einstein condensate of sodium.

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Physical Review AMar 1, 199688 citations

{10}^{11}

2.6 \mathrm{eV}

photon energy, a result significant for estimations of sodium vapor density in the lunar atmosphere. Our data fit well to a simple model for the loading of the MOT dependent only on the sodium desorption rate and residual gas density. Up to $3.7\ifmmode\times\else\texttimes\fi{}{10}^{7}$ Na atoms were confined under ultrahigh-vacuum conditions, creating promising loading conditions for a vapor-cell-based atomic Bose-Einstein condensate of sodium.

We have confined magneto-optically trapped cesium atoms to densities of nearly

{10}^{12}

${\mathrm{cm}}^{\mathrm{\ensuremath{-}}3}$ by directing most of the population to a hyperfine level which does not interact with the trapping light. This compression represents almost an order of magnitude improvement on the best density we have been able to attain in a conventional magneto-optical trap. In previous work such improvements in density have only been reported for much lighter sodium. We discuss and demonstrate the difficulties in applying the technique to a heavy alkali-metal atom and the limits that are imposed on the best combination of density and temperature that can be produced. We present a simple model that accurately reproduces the density behavior, and justify its basic assumptions by Monte Carlo simulation. \textcopyright{} 1996 The American Physical Society.