Main Integrating Electron Detector System for the MOLLER Experiment

The Measurement Of a Lepton-Lepton Electroweak Reaction (MOLLER) experiment is designed to precisely measure the parity-violating asymmetry of longitudinally polarized electron-electron (Møller) scattering in Hall A at Jefferson Lab. By measuring the predicted 33 ppb asymmetry with an uncertainty of 0.8 ppb, MOLLER will provide an ultra-precise determination of the weak mixing angle to 0.1% fractional accuracy. The detector system will primarily run in integration mode for the asymmetry measurement and can switch to event mode for kinematics and background studies. Among the most challenging aspects of the experiment will be the detection of the small asymmetry in the detector signal. The main detector array, comprising 224 fused silica Cherenkov detectors, implements a segmentation to separate the Møller distribution from other scattered electron contributions. Within the electronics chain, integrating techniques are used to resolve the Møller flux asymmetry beyond the electronic resolution. This talk will provide an overview of the MOLLER main detector designs and electronics.