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

along a horizontal plane through the center of the coils. In this figure the
heavily cross-hatched regions indicate wire while the lightly cross-hatched ar-
88 mm
62 mm
Quadrupole coil
69 mm
34 mm
158 mm
1.5 mm
gap
lower
glass
cell
33 mm
75 mm
Quadrupole coil
wire layer:
C
B
A
nylon
spacers
Figure 3.24: Schematic of the magnetic trap showing its geometry along a
horizontal plane through the center of the coils.
eas indicate nylon spacers. Wire sections (A) and (B) each consist of a total
of 53 turns while section (C) consists of a total of 70 turns. More detail on
the construction of these coils can be found in [83, 84].
As discussed in Sec. 2.4, the field near the center of this arrangement
is well approximated with a linear gradient whose value varies with direction.
The calculated value of the gradient along the axis of symmetry is 9.7 G/(cm A)
and 4.8 G/(cm A) along the radial direction. These values were calculated
using Eq. 2.39 and the geometry in Fig. 3.24 and agree well with measured
values [84].
The two coils are in series with three power supplies (Lambda GEN80-
126