2003/11/14 by J. G. E. Harris, R. A. Michniak, S. V. Nguyen +6 · 1 citation
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #cond-mat
paper · pdf · doi:10.1209/epl/i2004-10059-y
17 pages, 4 figures
arxiv created 2003/11/14 · openalex publication_date 2004/07/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We have extended buffer gas cooling to trap atoms with small effective magnetic moments μ eff . For μ eff ⩾ 3μ B , 10 12 atoms were buffer gas cooled, trapped, and thermally isolated in ultra high vacuum with roughly unit efficiency. For μ eff < 3μ B , the fraction of atoms remaining after full thermal isolation was limited by two processes: wind from the rapid removal of the buffer gas and desorbing helium films. In our current apparatus we trap atoms with μ eff ⩾ 1μ B , and thermally isolate atoms with μ eff ⩾ 1.8μ B . This triples the number of atomic species which can be buffer gas cooled and trapped in thermal isolation. Extrapolation of our results and simulations of the loss processes indicate that it is possible to trap and evaporatively cool 1μ B atoms using buffer gas cooling.