Design of Modular NaI(Tl) Detectors for Fundamental Symmetry Measurements with Neutrons

The NOPTREX and Nab collaborations seek to utilize the fundamental nature of the neutron to probe the weak interaction. These experiments exemplify the variety of demands for different detection parameters, such as the gain or timing/energy resolution. In an effort to efficiently meet these various requirements using one set of detectors, we have developed an array of modular NaI(Tl) detectors with novel electronics that allow for operation in both current or pulse mode to accommodate better energy and timing resolution, respectively. To process the data from the detectors, we also have two independent data acquisition systems tailored to the demands of each experiment consisting of the CAEN DT5751 digitizer for the Nab timing measurements and the CAEN DT5560SE digitizer for the NOPTREX P- and T-Odd measurements. The development of this system has involved conducting experiments to determine the optimal design for the detectors, characterizing the detector components, and testing the data acquisition systems. The adaptability of these detectors will allow for a wide range of uses in nuclear physics experiments.