Polarization analysis for the thermal chopper spectrometer TOPAS Jörg Voigt, Helmut Soltner, Earl Babcock, Robert J. Aldus, Zahir Salhi, Ramil R. Gainov and Thomas Brückel EPJ Web of Conferences, 83 (2015) 03016 Published online: 23 January 2015 DOI: 10.1051/epjconf/20158303016