Atomic Electron Motion for M\"oller 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 M\"oller polarimeter operating in a double--arm mode. It is demonstrated that the effect can result in either {\it increase} or {\it decrease} of the measured polarization depending on the detector positions. The effect is simulated for the M\"oller polarimeter to be installed at CEBAF Hall A. 
Andrei Afanasev (CEBAF) and Alexander Glamazdin (Kharkov Institute of   Physics and Technology)