Functional tests of the detector assembly demonstration model of the eXTP wide field monitor: system description and results

The Wide Field Monitor is one of the 4 state-of-the-art instruments onboard the enhanced X-ray Timing and Polarimetry mission, which will search for and observe neutron stars, magnetars and black holes to study matter under extreme conditions of density, gravity and magnetism. The wide-field cameras of the Wide Field Monitor are based on large-area silicon drift detectors. Such position-sensitive spectroscopic detectors, together with their front-end electronics, must pass a series of functional tests before proceeding with the mass production of the detector assemblies. This paper describes the test system developed to carry out such measurements, as well as reporting the results of the functional tests together with a preliminary characterisation of the performance of the detector assemblies.