  A novel Compton Scanner setup has been built, commissioned and operated at
the Max-Planck-Institute for Physics in Munich to collect pulses from bulk
events in high-purity germanium detectors for pulse shape studies. In this
fully automated setup, the detector under test is irradiated from the top with
661.660 keV gammas, some of which Compton scatter inside the detector. The
interaction points in the detector can be reconstructed when the scattered
gammas are detected with a pixelated camera placed at the side of the detector.
The wide range of accepted Compton angles results in shorter measurement times
in comparison to similar setups where only perpendicularly scattered gammas are
selected by slit collimators. In this paper, the construction of the Compton
Scanner, its alignment and the procedure to reconstruct interaction points in
the germanium detector are described in detail. The creation of a first pulse
shape library for an n-type segmented point-contact germanium detector is
described. The spatial reconstruction along the beam axis is validated by a
comparison to measured surface pulses. A first comparison of Compton Scanner
pulses to simulated pulses is presented to demonstrate the power of the Compton
Scanner to test simulation inputs and models.
