2012 Journal of Physics B 45 235301
V. Bolpasi, J. Grucker, M. J. Morrissey, and W. von Klitzing
http://dx.doi.org/10.1088/0953-4075/45/23/235301
Abstract: The Ioffe–Pritchard trap is the workhorse of modern cold atom physics. Here, we present a novel Ioffe–Pritchard trap coil configuration based purely on circular coils. By eliminating the traditional Ioffe bars one can increase the gradient and thus the radial trapping frequency by almost a factor 2. We also present a method to achieve minimal coupling between the gradient, curvature and offset fields of the trap, thus facilitating the dynamic control of the trapping frequencies and aspect ratio.
