  A small liquid argon Time Projection Chamber (LAr TPC) was operated for the
first time in a magnetic field of 0.55 Tesla. The imaging properties of the
detector were not affected by the magnetic field. In a test run with cosmic
rays a sample of through going and stopping muons was collected. The chamber
with the readout electronics and the experimental setup are described. A few
selected events were reconstructed and analyzed and the results are presented.
The magnetic bending of the charged particle tracks allows the determination of
the electric charge and the momentum, even for particles not fully contained in
the drift chamber. These features are e.g. required for future neutrino
detectors at a neutrino factory.
