Collimator and detector design for the MOLLER experiment

The MOLLER experiment proposes to measure the parity-violating electron-electron scattering asymmetry from an unpolarized liquid Hydrogen target with unprecedented accuracy (relative uncertainty 2.4%). Systematic control and large experimental acceptance are crucial to achieving that goal. The collimator system is designed to cover the 100% azimuthal acceptance and provide an adequate signal-to-background ratio. The segmented detector design will measure the signal and background contributions from different physics processes and help to control the systematic uncertainties. In this talk, I give an overview of the collimator system and detector's mechanical design.