Eur. Phys. J. A 24, s2.131-s2.131 (2005)
DOI: 10.1140/epjad/s2005-04-031-1

Stabilization system of the laser system of the A4 Compton backscattering polarimeter

Jürgen Diefenbach

Institut für Kernphysik, Universität Mainz, J. J. Becherweg 45, D-55099 Mainz, Germany

(Received 01 November 2004 / Published online 08 February 2005)

Abstract

The A4 Compton backscattering polarimeter is used to measure the degree of spin polarization of the 855 MeV electron beam provided by the MAMI accelerator facility. Therefore special care must be taken to optimize and stabilize the overlap of electron and laser beam in order to get the highest luminosity for shortest measurement times. For this purpose an active stabilization system for the laser beam position of our intra-cavity polarimeter's optical resonator has been developed and commissioned.

PACS: 07.50.Qx Signal processing electronics - 29.27.Hj Polarized beams - 42.60.By Design of specific laser systems - 42.60.Lh Efficiency, stability, gain, and other operational parameters

© Società Italiana di Fisica, Springer-Verlag 2005