Atomic Electron Motion for Möller Polarimetry in a Double–arm Mode

We analyse an effect of electron Fermi motion at atomic shells on the accuracy of electron beam polarization measurements with a Möller polarimeter operating in a double–arm mode. It is demonstrated that the effect can result in either increase or decrease of the measured polarization depending on the detector positions. The effect is simulated for the Möller polarimeter to be installed at CEBAF Hall A. To be submitted to Nuclear Instruments and Methods CEBAF–PR–96–003 On leave from Kharkov Institute of Physics and Technology, Kharkov 310108, Ukraine Permanent address: Kharkov Institute of Physics and Technology, Kharkov 310108, Ukraine