Conveners
Electron Polarimetry
- Dave Gaskell (Jefferson Lab)
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Valery Tyukin (University Mainz)9/27/24, 9:00 AM
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.
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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 -
Dr Mark Dalton (Jefferson Lab)9/27/24, 9:20 AM
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)...
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P Gautam9/27/24, 9:40 AM
The MOLLER experiment at Jefferson Lab aims to measure the parity violating asymmetry(𝐴PV) in electron-electron(Møller) scattering. The prediction for 𝐴PV in the current experimental design is ≈33parts per billion (ppb) and the goal is to measure this quantity with an overall uncertainty of 0.8 ppb. This measurement depends on the precise determination of the electron beam’s...
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Shefali Shefali (University of Manitoba)9/27/24, 10:00 AM
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....
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Donald Jones (Jefferson lab)9/27/24, 10:20 AM
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...
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