Eur. Phys. J. A 24, s2.141-s2.141 (2005)
DOI: 10.1140/epjad/s2005-04-034-x

Redesign of the A4 calorimeter for the measurement at backward angles

Boris Gläser

Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, J.-J.-Becher-Weg 45, 55099 Mainz, Germany

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

Abstract

Backward angle measurements of the parity violating asymmetry in elastic electron proton scattering are planned with the A4 calorimeter. At present the experiment measures at forward angles. For the measurement at backward angles the support of the PbF₂-detector has to be redesigned. For this purpose it will be positioned on a rotatable platform, so that measurements at forward and backward angles will be possible with little effort. We will highlight the new experimental setup and its special features.

PACS: 07.05.Fb Design of experiments - 13.40.Gp Electromagnetic form factors

The Author, vor the A4 Collaboration) This work comprises part of a diploma thesis.

© Società Italiana di Fisica, Springer-Verlag 2005