Tonyushkin, Alexey APrentiss, Mara2013-04-292010Tonyushkin, Alexey, and Mara Prentiss. 2010. Straight macroscopic magnetic guide for cold atom interferometer. Journal of Applied Physics 108(9): 094904.0021-8979http://nrs.harvard.edu/urn-3:HUL.InstRepos:10591650We demonstrate a macroscopic magnetic guide for cold atom interferometry, where the magnetic guiding field is generated by a symmetrical array of racetrack coils of copper tape. This system represents a conceptual advance over previous guided atom interferometers based on nonsymmetrical geometries because the symmetry provides a much lower magnetic field curvature per fixed length than equivalent nonsymmetrical geometries, permitting a decrease in system length without increasing the decoherence rate associated with field curvature. We realized a magnetic guide a few cm away from each coil, where smooth translation of the guided atoms is achieved by changing the currents in second array of the multiple-conductor tape.en-USJournal Article2013-04-2910.1063/1.3506685