Nguyen, Scott V.Doret, S. CharlesConnolly, ColinMichniak, Robert A.Ketterle, WolfgangDoyle, John2016-08-232005Nguyen, 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.72.060703.1050-2947http://nrs.harvard.edu/urn-3:HUL.InstRepos:27867251Metastable 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.en-USJournal Article2016-08-2310.1103/PhysRevA.72.060703