Single-Photon Atomic Cooling - Raizen Lab - The University of ...

process.
The two coils are arranged in the simplest trapping geometry possible:
the anti-Helmholtz configuration. In this setup two coils are positioned a
distance d from each other and carry current of the same magnitude but in
the opposite direction. More details on this coil geometry and resultant field
can be found in Sec. 2.4.
Figure 3.23 shows one of the coils during the construction process,
providing a convenient view of a wound wire sitting on a PVC holder. Each
coil was formed from 14 gauge magnetic wire wound around a PVC core a
quadrupole coil
PVC housing
Figure 3.23: A picture of a quadrupole coil during the construction process,
providing a convenient view of a wound wire sitting on a PVC holder.
total of 176 times. The wire was wound in three sections, each separated by
1/16 ′′ thick nylon spacers. The coil and base were then covered by a PVC lid
forming a water tight encasement. This design allows the coils to be cooled
by water flowing directly over the wires.
Figure 3.24 is a schematic of the magnetic trap, showing its geometry
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