Design and Testing of the Cherenkov Detector Assembly for the MOLLER Experiment

The Measurement of a Lepton-Lepton Electroweak Reaction (MOLLER) experiment plans to measure the parity-violating asymmetry of longitudinally polarized electron-electron (møller) scattering. The experiment uses an 11 GeV electron beam impinging on a liquid hydrogen target. Scattered electrons are then momentum analyzed by a magnetic spectrometer before being intercepted by a cylindrical array of radiation-hard fused silica Cherenkov detectors. This array is divided into 6 rings, with our group focused on the optimization of ring 6 using optical simulations. Mechanically, the rings are assembled using 28 segments in the beam's azimuth, and a single-segment assembly is being constructed and tested in a cosmic stand. In this talk, I will discuss the ring 6 design and prototype performance as well as results from the multiple-ring segment assembly tests.