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Abstract:
This thesis deals with the reconstruction of a MOTRe-
Mi apparatus, which represents the combination of a magneto-optical trap (MOT)
and a Reaction Microscope (ReMi). With this setup an ultracold degenerate Fermi
gas consisting of 6Li atoms will be generated and studied in future. Primarily
the Li atoms will be vaporized, precooled in a Zeeman Slower, trapped and stored
with the MOT at typical temperatures of a few 100 μK. Within the scope of this
thesis initially the parameters of the Zeeman Slower were optimized. For this purpose
the magnetic field profiles of the single coils were measured and the ideal coil
currents determined. The efficiency and other properties of the Zeeman Slower were
calculated with a simulation programme. The focus of this thesis was on planning
and reconstructing the laser system and the optical setup for the magneto-optical
trap. This included among others the adaptation of the laser frequencies from 7Li
to 6Li and the integration of an additional amplifier in order to achieve a higher
output power. Using the frequency stabilization scheme of a frequency offset lock
([SEG+99]) it is now possible to tune the laser frequency over a large range at a
constant laser power. This is required on the one hand for the later transfer of the
atoms to a dipole trap and on the other hand for the imaging of the atom cloud by
light absorption at high magnetic fields. Finally the vacuum chamber and the Reaction
microscope was baked out and activated at a vacuum of about 7 · 10-10 mbar.
