Speaker
Description
Measurement of electron beam polarization is a cornerstone for
experiments probing hadronic structure and searching for Physics beyond
standard model. Compton polarimetry, based on Compton scattering between
polarized electrons and polarized photons offer non invasive, continuous
monitoring suited for high current, long duration experiments at
facilities like the Thomas Jefferson National Accelerator Facility
(JLab). However the drive for ever greater precision has spurred
significant technical evolution and confronted the scientific community
with new challenges related to systematic uncertainties and
understanding detector responses. Unlike collider experiments, JLab
typically operates at lower beam current (~100 microAmpere), resulting
in longer measurement times and an increased sensitivity to systematic
errors. At lower energies, the asymmetry in scattering becomes smaller,
further complicating the separation of signal from background and the
understanding of any non linearity in detector response.
The latest polarimeter upgrades at JLab includes pixelated diamond based
electron detector, improved trigger mechanism that allows precise
extraction of asymmetry and real time data quality monitoring. This work
reviews these challenges and highlights ongoing adaptations referencing
recent advances achieved at JLab.
