Measurements of temperature and spring constant in a magneto-optical trap

We have measured the low-density characteristics of a magneto-optical trap for both isotopes of rubidium. Trapped-atom temperatures are measured by the time-of-flight technique and are similar to temperatures in optical molasses. They are below the Doppler limit in most cases and increase linearly w...

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Veröffentlicht in:Journal of the Optical Society of America. B, Optical physics Optical physics, 1994-05, Vol.11 (5), p.703
Hauptverfasser: Wallace, C. D., Dinneen, T. P., Tan, K. Y. N., Kumarakrishnan, A., Gould, P. L., Javanainen, J.
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container_issue 5
container_start_page 703
container_title Journal of the Optical Society of America. B, Optical physics
container_volume 11
creator Wallace, C. D.
Dinneen, T. P.
Tan, K. Y. N.
Kumarakrishnan, A.
Gould, P. L.
Javanainen, J.
description We have measured the low-density characteristics of a magneto-optical trap for both isotopes of rubidium. Trapped-atom temperatures are measured by the time-of-flight technique and are similar to temperatures in optical molasses. They are below the Doppler limit in most cases and increase linearly with the ratio of laser intensity to laser detuning. A slight difference between the two isotopes is observed. The data agree well with three-dimensional, multistate, semiclassical simulations. Spring constants of the trap are inferred from careful measurements of the size of the trapped-atom cloud. The spring constant is seen to increase with intensity at low intensity, becoming independent of intensity at high intensity. This trend is consistent with sub-Doppler cooling mechanisms.
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subjects 664200 - Spectra of Atoms & Molecules & their Interactions with Photons- (1992-)
ALKALI METALS
ATOMIC AND MOLECULAR PHYSICS
COOLING
DISTRIBUTION FUNCTIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
FUNCTIONS
LASER RADIATION
MAGNETIC FIELD CONFIGURATIONS
METALS
OPEN CONFIGURATIONS
RADIATIONS
RUBIDIUM
TEMPERATURE MEASUREMENT
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TRAPPING
title Measurements of temperature and spring constant in a magneto-optical trap
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