Progress report on the A4 Compton backscattering polarimeter

  • Yoshio Imai
Conference paper


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 have been detected. This article describes the new design concept and the current status and results.


Stokes Parameter Vacuum Window Backscatter Photon Intracavity Power Compton Polarimeter 
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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • Yoshio Imai
    • 1
  1. 1.Inst. für KernphysikUniversität MainzMainzGermany

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