Abstract
PANDA is a triple-axis spectrometer utilizing the cold neutron source of the German research reactor FRM II in Garching. Its typical applications comprise studies of spin dynamics and lattice dynamics, magnetic excitations and magnetic structures. In the past years, PANDA has earned its reputation by excellent performance in these fields operating in conventional, unpolarized mode. To complement this normal mode of operation, a full polarization analysis of the scattered neutrons was highly desired and, therefore, was recently implemented. First tests to characterize the different spectrometer components for the polarization analysis mode were performed with neutron spin directions perpendicular to the scattering plane, utilizing static vertical guide fields between sample, Heusler monochromator, spin flipper and Heusler analyzer. Finally, a fully automated setup of split coils around the sample space was implemented to allow for longitudinal polarization analysis for arbitrary configurations. Different neutron spin polarization directions were successfully investigated, showing polarizations of 92% or higher.
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