skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Storage ring to investigate cold unidimensional atomic collisions

Abstract

In this paper we employ a circulating ring of trapped atoms, that we have named the atomotron, to study cold collisions. The atomotron is obtained from a conventional magneto-optical trap when the two pairs of normally retroreflecting Gaussian laser beams in the x-y plane are slightly offset. Circulating stable atomic orbits then form a racetrack geometry in this plane. The circulating atom flux behaves similarly to an atomic beam with an average tangential velocity much greater than the transverse components, and is therefore suitable for one-dimensional atomic collision studies. Using the atomotron, we have investigated the polarization dependence of ultracold photoassociation collisions between Rb atoms circulating in the racetrack. The ability to investigate collisions in ultracold circulating atomic rings reveals alignment and orientation properties that are averaged away in ordinary three-dimensional magneto-optical trap collision processes.

Authors:
; ; ; ; ;  [1]
  1. Instituto de Fisica de SaoCarlos, Universidade de SaoPaulo, Caixa Postal 369, 13560-970, SaoCarlos-SP (Brazil)
Publication Date:
OSTI Identifier:
20786240
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 72; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevA.72.060701; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ATOM-ATOM COLLISIONS; ATOMIC BEAMS; ATOMS; COOLING; GEOMETRY; LASER RADIATION; MAGNETO-OPTICAL EFFECTS; ORBITS; ORIENTATION; PHOTON-ATOM COLLISIONS; POLARIZATION; RADIATION PRESSURE; RUBIDIUM; STORAGE RINGS; TRAPPING; TRAPS

Citation Formats

Marcassa, L. G., Caires, A. R. L., Nascimento, V. A., Dulieu, O., Weiner, J., and Bagnato, V. S. Storage ring to investigate cold unidimensional atomic collisions. United States: N. p., 2005. Web. doi:10.1103/PHYSREVA.72.0.
Marcassa, L. G., Caires, A. R. L., Nascimento, V. A., Dulieu, O., Weiner, J., & Bagnato, V. S. Storage ring to investigate cold unidimensional atomic collisions. United States. doi:10.1103/PHYSREVA.72.0.
Marcassa, L. G., Caires, A. R. L., Nascimento, V. A., Dulieu, O., Weiner, J., and Bagnato, V. S. Thu . "Storage ring to investigate cold unidimensional atomic collisions". United States. doi:10.1103/PHYSREVA.72.0.
@article{osti_20786240,
title = {Storage ring to investigate cold unidimensional atomic collisions},
author = {Marcassa, L. G. and Caires, A. R. L. and Nascimento, V. A. and Dulieu, O. and Weiner, J. and Bagnato, V. S.},
abstractNote = {In this paper we employ a circulating ring of trapped atoms, that we have named the atomotron, to study cold collisions. The atomotron is obtained from a conventional magneto-optical trap when the two pairs of normally retroreflecting Gaussian laser beams in the x-y plane are slightly offset. Circulating stable atomic orbits then form a racetrack geometry in this plane. The circulating atom flux behaves similarly to an atomic beam with an average tangential velocity much greater than the transverse components, and is therefore suitable for one-dimensional atomic collision studies. Using the atomotron, we have investigated the polarization dependence of ultracold photoassociation collisions between Rb atoms circulating in the racetrack. The ability to investigate collisions in ultracold circulating atomic rings reveals alignment and orientation properties that are averaged away in ordinary three-dimensional magneto-optical trap collision processes.},
doi = {10.1103/PHYSREVA.72.0},
journal = {Physical Review. A},
number = 6,
volume = 72,
place = {United States},
year = {Thu Dec 15 00:00:00 EST 2005},
month = {Thu Dec 15 00:00:00 EST 2005}
}