Detector System for the Enge Split-Pole Spectrograph at Florida State University*

As a collaborative project between Louisiana State University (LSU) and Florida State University (FSU), a large-acceptance Enge Split-Pole Spectrograph (SPS) was recently installed at FSU. The SPS is used to conduct charged-particle spectroscopy experiments using stable beams to study transfer reactions of interest to nuclear structure and astrophysics. Along with the SPS's installation, auxiliary detector systems have been refurbished and developed. These include the Silicon Array for Branching Ratio Experiments (SABRE) and the Focal Plane Detector (FPD). SABRE is an array of silicon detectors that is used to detect charged-particle decays to determine the angular momentum distributions of decay particles and branching ratios. The FPD is a proportional counter positioned at the focal plane of the SPS, where it measures the energy loss and two different positions along the path of the reaction products dispersed by the SPS to determine particle identification and magnetic rigidity. The design, development, and commissioning of these detectors will be discussed.