Loading of a Rb magneto-optic trap from a getter source

Details Loading of a Rb magneto-optic trap from a getter source Loading of a Rb magneto-optic trap from a getter source

2002-04-06

arxiv.org/abs/physics/0204022v1

Physical Review A 64, 023402 (2001)

Physics

Atomic Physics

5 pages, 5 figures

Scientific paper

10.1103/PhysRevA.64.023402

We study the properties of a Rb magneto-optic trap loaded from a commercial getter source which provides a large flux of atoms for the trap along with the capability of rapid turn-off necessary for obtaining long trap lifetimes. We have studied the trap loading at two different values of background pressure to determine the cross-section for Rb--N$_2$ collisions to be 3.5(4)x10^{-14} cm^2 and that for Rb--Rb collisions to be of order 3x10^{-13} cm^2. At a background pressure of 1.3x10^{-9} torr, we load more than 10^8 atoms into the trap with a time constant of 3.3 s. The 1/e lifetime of trapped atoms is 13 s limited only by background collisions.

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