PA-PRO-2014-003

The $\overline{\text{P}}\text{ANDA}$-experiment will be one of the main
experiments at the upcoming Facility for Antiproton and Ion Research
(FAIR) at the GSI in Darmstadt. The fixed target experiment will explore
$\overline{\text{p}}$p annihilations in the charm mass region with intense,
phase space cooled beams with momenta between 1.5 and 15 GeV/c.

The innermost subdetector of $\overline{\text{P}}\text{ANDA}$ will be
the Micro Vertex Detector (MVD) and consists of silicon strip and pixel
detectors.
The MVD can be further divided into two sub-structures. A
barrel-structure around the vertex and a
disc-structure in beam direction with six disks of different size.
The last two disks are hybrid disks with trapezoidal strip sensors in the outer layer surrounding a smaller
ring of pixel sensors in the inner part. The other disks are made only out of pixel detectors.

The first trapezoidal prototype sensors were produced by
CiS\footnote{Forschungsinstitut f\"ur Mikrosensorik und Photovoltaik GmbH}
and have a stereo angle of $15^{\circ}$ with 512 strips per sensor side
and a strip pitch of $67.5\,\mu\text{m}$.

In order to operate and test the prototype sensors, they were
chracterized with a probestation as well as with a dedicated testboard.
A first beam test was done at COSY\footnote{Cooler Synchrotron at
Forschungszentrum J\"ulich GmbH} with protons of $2.95\,\text{GeV/c}$ and
$800\,\text{MeV/c}$ in December 2013 and January 2014.