Development of Green Laser Cavity for Precision Compton Polarimetry in Jefferson Lab Hall A

Many experiments at Jefferson Lab require good knowledge of the polarization of the electron beam. The Pb Radius Experiment (PREx) demands polarization measurement of a lower energy (1.0 GeV) electron beam at 1.0 $\%$ accuracy, which can not be achieved by the infra-red (1064 nm) laser Compton polarimeter presently operating in Hall A. Therefore a green laser (CW, 532 nm) based Fabry-P$\acute{e}$rot cavity for upgraded high precision Compton Polarimetry has been proposed and under development. The system used as a high energy polarized photon target for measuring the polarization of a low- to high-energy (1.0 GeV $\sim$ 11.0 GeV) electron beam in a nondestructive manner. Our goal is to amplify a low power laser beam to achieve 1.5 kW of intra cavity power to improve signal to noise ratio of the polarimeter. We locked our test cavity to a frequency doubled Nd:YAG tunable narrow linewidth laser using the Pound-Drever-Hall (PDH) technique. The recent progress and future plan of this project will be presented.