Cold atomic clouds and Bose-Einstein condensates have been stored in a 10cm diameter vertically-oriented magnetic ring. An azimuthal magnetic field enables low-loss propagation of atomic clouds over a total distance of 2m, with a heating rate of less than 50nK/s. The vertical geometry was used to split an atomic cloud into two counter-rotating clouds which were recombined after one revolution. The system will be ideal for studying condensate collisions and ultimately Sagnac interferometry.
@article{arxiv.cond-mat/0506142,
title = {A large magnetic storage ring for Bose-Einstein condensates},
author = {A. S. Arnold and C. S. Garvie and E. Riis},
journal= {arXiv preprint arXiv:cond-mat/0506142},
year = {2007}
}