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arXiv:1011.1078 · Physical Review A

Fast production of large Na23 Bose-Einstein condensates in an optically plugged magnetic quadrupole trap

Myoung-Sun Heo, Jae-yoon Choi, Yong-il Shin

Published Jan 26, 2011• 33 citations
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Abstract

We demonstrate a fast production of large $^{23}\mathrm{Na}$ Bose-Einstein condensates in an optically plugged magnetic quadrupole trap. A single global minimum of the trapping potential is generated by slightly displacing the plug beam from the center of the quadrupole field. With a dark magneto-optical trap and a simple rf evaporation, our system produces a condensate with $N\ensuremath{\approx}{10}^{7}$ atoms every 17 s. The Majorana loss rates and the resultant heating rates for various temperatures are measured with and without plugging. The average energy of a spin-flipped atom is almost linearly proportional to temperature and determined to be about $60%$ of the average energy of a trapped atom. We present a numerical study of the evaporation dynamics in a plugged linear trap.

DOI
10.1103/physreva.83.013622

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