Publication: Evaporative cooling of metastable helium in the multi-partial-wave regime
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Date
2005
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American Physical Society (APS)
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Nguyen, Scott V., S. Charles Doret, Colin B. Connolly, Robert A. Michniak, Wolfgang Ketterle, and John M. Doyle. 2005. Evaporative Cooling of Metastable Helium in the Multi-Partial-Wave Regime. Physical Review A 72, no. 6. doi:10.1103/physreva.72.060703.
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Abstract
Metastable helium is buffer gas cooled, magnetically trapped, and evaporatively cooled in large numbers. 1011 4 He* atoms are trapped at an initial temperature of 400 mK and evaporatively cooled into the ultracold regime, resulting in a cloud of 2± 0.5 109 atoms at 1.4± 0.2 mK. Efficient evaporation indicates low collisional loss for 4 He* in both the ultracold and multi-partial-wave regime, in agreement with theory.
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