Experiments with Supersonic Beams as a Source of Cold Atoms

Ionizer
500 l/s Turbo Pump
Ion Optics
Quadrupole
Figure 5.17: A CAD image of the hydrogen detection chamber with a mockup of the
Ardara Technologies ionizer and quadrupole. The front of the ionizer sits 6.04 cm
from the center of the trapping volume.
The trapping chamber is a 6-way 1.33 inch conflat cross with tubes made of
the same dimensions as the coilgun chamber’s tube. This chamber is made from 304
stainless steel, since it would be difficult to construct this chamber from titanium.
The center of the trapping volume is 6.30 cm from the start of the chamber. The
final three coilgun coils are wound around this chamber, and the junction between
the coilgun and trapping chambers leads to a center-to-center distance of 28.65 mm
between coils 15 and 16, instead of the 12.45 mm between the other coilgun coils.
The cross arms of the chamber allow for optical access to the trapped atoms, which
will be important for laser detection and spectroscopy (see section 5.4.1). Finally, the
chamber extends past the trap to another 1.33 inch conflat 5.03 cm from the center
of the trapping volume, which connects to the detection chamber.
The detection chamber serves two purposes in the experiment. First, it houses
the Ardara Technologies ionizer and quadrupole mass spectrometer used to for detec-
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