TA-DPG-2018-017

Testing of silicon strip detectors with a spatially resolved infrared laser test-stand*
— ∙Martin Kesselkaul, Kai-Thomas Brinkmann, Tommaso Quagli, Robert Schnell, and Hans-Georg Zaunick for the PANDA-Collaboration
— II. Physikalisches Institut, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 16, D-35392 Gießen

The PANDA experiment at the future accelerator facility FAIR will investigate proton-antiproton reactions at a stationary target. The Micro Vertex Detector (MVD), as the innermost detector of PANDA, will measure the tracks of charged particles and secondary decay vertices close to the interaction point with high precision. It is comprised of various layers of silicon-pixel and -strip sensors.
For the characterization and quality measurement of the double-sided silicon strip detectors used in the PANDA MVD, a laser test-stand has been developed. An automated xy-table with an position accuracy of 50 nm places an infrared laser above the sensor while recording the spatially resolved response of the sensor. This contribution will focus on the analysis of the data taken with this setup. The quantities of interest are the charge collection efficiency (CCE), as well as the charge sharing characteristics between adjacent strips, which are inferred for analysis of the sensor quality. The latter will be discussed in detail for different measurement parameters to deduce the spatial resolution of the sensor.
*Funded by BMBF and HIC for FAIR