Progress report on the A4 Compton backscattering polarimeter [chapter]

Yoshio Imai
2005 From Parity Violation to Hadronic Structure and more  
The A4 collaboration at the Dept. of Nuclear Physics, University of Mainz, is conducting experiments on parity violation in the elastic electron-nucleon-scattering which require the use of polarized beams. In order to measure the absolute beam polarization, we have installed a Compton backscattering polarimeter in front of the target, using for the first time the internal cavity concept. A maximum intracavity intensity of 90 W has been measured, and in August 2003, first backscattered photons
more » ... scattered photons have been detected. This article describes the new design concept and the current status and results.
doi:10.1007/3-540-26345-4_29 fatcat:zj7jawtsfve3hmc6f72bjek564