Magnetic Field Tomography

Details Magnetic Field Tomography Magnetic Field Tomography

2001-03-20

arxiv.org/abs/cond-mat/0103421v3

European Phys. Journal D 15 (2): 173-180 (2001)

Physics

Condensed Matter

Soft Condensed Matter

8 pages, 8 figures

Scientific paper

10.1007/s100530170163

Neutral atoms may be trapped via the interaction of their magnetic dipole moment with magnetic field gradients. One of the possible schemes is the cloverleaf trap. It is often desirable to have at hand a fast and precise technique for measuring the magnetic field distribution. We introduce a novel diagnostic tool for instantaneous imaging the equipotential lines of a magnetic field within a region of space (the vacuum recipient) that is not accessible to massive probes. Our technique is based on spatially resolved observation of the fluorescence emitted by a hot beam of sodium atoms crossing a thin slice of resonant laser light within the magnetic field region to be investigated. The inhomogeneous magnetic field spatially modulates the resonance condition between the Zeeman-shifted hyperfine sublevels and the laser light and therefore the amount of scattered photons. We demonstrate this technique by mapping the field of our cloverleaf trap in three dimensions under various conditions.

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