Conveners
Electron Polarimetry
- Dave Gaskell (Jefferson Lab)
The Mainz Energy Recovering Superconducting Accelerator (MESA) requires for carry out of the high-precision measurements exactly measurement the long-term spin properties of the electron beam.
The chain of three Mott and Möller polarimeters at different beam energies is planed. Actual design of the 5.0 MeV beam section contained a kicker and a Mott polarimeter is presented
A new level of accuracy in the measurement of electron beam polarization using Compton polarimetry was achieved during the CREX experiment. Conducted in experimental Hall A at Jefferson Lab in 2020, the back-scattered photons from the Compton scattering process were detected. A total uncertainty of dP/P=0.36% was achieved, surpassing even the measurement from the SLAC Large Detector (SLD)...
The Measurement Of a Lepton-Lepton Electroweak Reaction (MOLLER) experiment anticipates new dynamics beyond the Standard Model. The measurements are acquired by the scattering of longitudinally polarized electrons off unpolarized electrons in a liquid hydrogen target using a set of detectors in Hall A at the Thomas Jefferson National Accelerator Facility (JLab) in Newport News, Virginia, USA....
A M\o ller polarimeter has been active in Hall A at Jefferson Lab since the late 1990s. During the first decade of its use, it was limited to systematic errors of several percent due to its use of a low field tilted foil target whose polarization was the limiting uncertainty. Eventually, an upgrade in the target and measurement techniques allowed for uncertainties down to the 2\% level. Two...
