Speakers
Description
The recent 12 GeV energy upgrade at the Thomas Jefferson National Accelerator Facility in Virginia has opened many new experimental possibilities including need for advancements in beam polarization measurement techniques. We will present some results from the preliminary analysis framework developed using GEANT4 for the Compton data analysis along with other novel ideas being attempted. We are also carrying out systematic studies on the polarization measurement through the setup and will share the preliminary studies and development. This Compton Polarimeter is integral to the MOLLER (Measurement of Lepton-Lepton Electroweak Reaction) experiment at JLab that seeks to measure the parity-violating asymmetry in electron-electron scattering with unprecedented precision, targeting a high-precision (2.4%) determination of the weak charge of the electron. Polarimetry is the biggest contributor in the error budget of this precision measurement. The design for this Compton polarimeter incorporates a magnetic chicane that bends the main electron beam into a laser-locked cavity where some electrons get Compton scattered with the photons of green laser. These backscattered photons are to be measured in a scintillator based photon detector and the thus scattered electrons are registered in a novel diamond pixel-based electron detectors. GEANT4 and Modelsim simulations will optimize detector response, timing, and noise reduction. This work builds on techniques from the Qweak experiment and introduces novel components for achieving new standards in precision polarimetry, essential for probing electroweak physics.
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