Dresden 2011 – scientific programme

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A: Fachverband Atomphysik

A 20: Ultra-cold atoms, ions and BEC V (with Q)

A 20.6: Talk

Thursday, March 17, 2011, 11:45–12:00, BAR 106

Continuous Loading of a Conservative Trap from an Atomic Beam — •Markus Falkenau¹, Valentin Volchkov¹, Jahn Rührig¹, Axel Griesmaier^1,2, and Tilman Pfau¹ — ¹5. Physikalisches Institut, Universität Stuttgart, Germany — ²Niels-Bohr Insitute, Copenhagen, Denmark

We present results on the fast accumulation of ⁵²Cr atoms in a conservative potential from a magnetically guided atomic beam. Without laser cooling on a cycling transition, a single dissipative step realized by optical pumping allows to load atoms at a rate of 2 · 10⁷s⁻¹ in the trap. Within less than 100 ms we reach the collisionally dense regime, from which we directly produce a Bose-Einstein condensate with subsequent evaporative cooling. This constitutes a new approach to degeneracy where, provided a slow beam of particles can be produced by some means, Bose-Einstein condensation can be reached for species without a cycling transition.