Speaker
Description
The European Spallation Source (ESS) is advancing towards full operation, with detector system development playing a central role in instrument readiness. This work presents the validation and integration of the neutron detection system for MIRACLES, the time-of-flight backscattering spectrometer at ESS. The MIRACLES detection system uses position-sensitive He-3 tubes arranged in resistively coupled U-shaped doublets. Experiments were performed at the Source Testing Facility at Lund University, where the full detection chain was operated and validated for the first time. Dedicated firmware was developed and successfully deployed, enabling end-to-end readout of the complete detector and DAQ system. Several performance aspects were characterized: position sensitivity was evaluated along the tube length using two resistor configurations and varying HV bias settings; pulse-height spectra were measured as a function of cable length between detectors and preamplifiers, providing practical guidance for the final installation layout. These measurements provide a comprehensive characterization of the detection system prior to installation at ESS, ensuring that the detector and readout chain are verified and commissioning-ready.