Speaker
Description
The European Spallation Source (ESS), expected to start its scientific program in 2027, will be the world's most powerful neutron source. This facility demands advanced systems for accurate beam monitoring and diagnostics. To meet these requirements, dedicated Ionization chamber Beam Monitors (I-BMs) have been developed, specifically designed to operate at ESS. This work will present both detailed simulation studies and experimental data obtained from test beam campaigns to evaluate the performance of the I-BMs.
The simulation framework presented includes modeling the complete signal formation process, from initial neutron-converter interactions to the final electronics output. Neutron transport and interactions are simulated in Geant4, with resulting energy deposition used as input to Garfield++ to calculate the induced current. The I-BM’s front-end electronics are emulated in LTspice to produce the final output signal. This framework provides a detailed description of the detector response and enables a systematic study of signal formation and detector performance. Experimental data acquired during test runs at the ISIS Neutron and Muon Source facility using I-BMs will also be presented.