Developing of the SuNflower β detection array

The synthesis of heavy elements is a key topic in nuclear astrophysics, with beta-decay measurements being essential for understanding numerous astrophysical processes. The SuN group at FRIB has a well-established program for measuring beta-decay distributions through total absorption spectroscopy. SuN, the gamma-ray calorimeter utilized in these measurements, was recently enhanced to SuN++ with additional smaller gamma detectors at its center. This study focuses on developing a new plastic scintillator array designed to detect beta-decay electrons in coincidence with gamma rays in SuN. The array employs plastic scintillators read by two Silicone Photomultipliers (SiPMs) in various configurations, investigating the detector's position sensitivity. Due to the sensitivity of the scintillator and SiPMs to light, the experimental setup was enclosed in a box, and covered with dark material as well as another box to maintain consistent background noise levels. The parameters for the Data Acquisition System (DAQ) were meticulously tuned to minimize background noise while retaining pertinent data points. After establishing the correct parameters, multiple runs were conducted to establish a baseline and compare source location effects on detection. This will be used to determine both the geometry of the beta detector at the center of SuN++, and the location of the SiPMs on the detector.