Investigating A Tetralateral Silicon Position Sensitive Detector For Use In Nuclear Reaction Experiments*

The GODDESS detector system uses a barrel array (ORRUBA) of silicon detectors in combination with a gamma-ray detector array for the goal of high-resolution measurements of nuclear reactions. In this project, the MSPSD TL-63 400 - a tetra-lateral 2D silicon position-sensitive detector (PSD) with a resistive front side and non-resistive back - was investigated for applications in future experiments as it provides continuous position information over a large surface area with good image resolution while using only five readout channels. The detector was characterized by testing with a triple alpha source and various masks placed between the source and detector, and its signal readout parameters were optimized for position resolution. The investigation was conducted at low vacuum, so a python script was developed for serial communication with a 974B QuadMag Vacuum Pressure Transducer and live pressure readout. The results of testing will be discussed, including conclusions about its potential utility within the GODDESS detector system and for target thickness characterization before/after experiments.