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Production of a bose einstein condensate of metastable helium atoms |
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| Authors: | F. Pereira Dos Santos J. Léonard Junmin Wang C. J. Barrelet F. Perales E. Rasel C. S. Unnikrishnan M. Leduc C. Cohen-Tannoudji |
| Affiliation: | 1. Collège de France and Laboratoire Kastler Brossel, Département de Physique de l’école Normale Supérieure, 24 rue Lhomond, 75231, Paris Cedex 05, France 3. Laboratoire de Physique des Lasers, Université Paris-Nord, avenue J.B. Clément, 93430, Villetaneuse, France 4. Universit?t Hannover, Weifengarten 1, 30167, Hannover, Germany 5. TIFR, Homi Bhabha Road, 400005, Mumbai, India |
| Abstract: | We recently observed a Bose-Einstein condensate in a dilute gas of 4He in the 23S1 metastable state. In this article, we describe the successive experimental steps which led to the Bose-Einstein transition at 4.7 μK: loading of a large number of atoms in a MOT, efficient transfer into a magnetic Ioffé-Pritchard trap, and optimization of the evaporative cooling ramp. Quantitative measurements are also given for the rates of elastic and inelastic collisions, both above and below the transition. Received 15 October 2001 |
| Keywords: | PACS. 32.80.Pj Optical cooling of atoms trapping – 03.75.Fi Phase coherent atomic ensembles quantum condensation phenomena – 05.30.Jp Boson systems |
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