Energy Resolved Imaging Using the GP2 Detector: Progress in Instrumentation, Methods and Data Analysis

We report on the recent developments of the ‘GP2’ detector, highlighting a selection of energy resolved measurements and associated methodology. GP2 is a 100k pixel time-offlight (ToF) neutron camera, which combines a gadolinium converter film and a CMOS (Complementary Metal Oxide Semiconductor) readout sensor. This paper describes an up-todate specification of the detector and its variants, progress that has been made towards integration into the Imaging and Materials Science instrument (IMAT) and an independent review at the ESS test beamline, V20. Two ToF data reduction methods are detailed, namely wavelength dispersive contrast enhancement and ‘wavelength frame multiplication’ (WFM) reduction.