British Physicist Sir Nevil Mott

The 5 MeV Mott Electron Polarimeter at Jefferson Lab: A Mott polarimeter has been developed to measure the spin polarization of the electron beams produced at CEBAF, the nuclear physics accelerator at Jefferson Lab. The polarimeter measures the counting rate asymmetry in the elastic Mott scattering process, which is non-zero for spin states perpindicular to the electron scattering plane. The Sherman function determines the relation between measured experimental asymmetry and the degree of polarization of the electron beam. Accurate polarimetry is ensured by addressing three concers: Determination of the theoretical Sherman function for the single elastic scattering process Correct measurement of the asymmetry for every target by achieving pure energy spectra Appreciation of the foil thickness extrapolation to a zero thickness target, i.e., a nucleus.

Documents & Photos	Mott Polarimeter Paper Comparison of JLab Polarimeters Nov 1999 Mott Pictures Lead Shielding
Procedures & Information	Standard Procedure: Use Monticello=>PGun=>Mott=>Mott script=>Help Ops Documentation Procedure (similar to above) for Mott setup Ops Training Presentation Mott Target Inventory See Grames thesis (Sec. 3.2 - Spin Rotators & Sec. 3.3 - Injector Mott Polarimeter) 100-500 keV Mott procedure
Mechanical Drawings	Mott_chamber.pdf Detector_assembly.pdf
Electrical Drawings & Data Acquisition	Logic Setup Trigger Logic Diagram Cabling Diagram 1 Cabling Diagram 2 Rack Layout Diagram
Other Polarimeters	Hall A Compton Polarimeter Hall A Moller Polarimeter Hall B Moller Polarimeter Hall C Moller Polarimeter