Development of a data acquisition system for the μSR spectrometer prototype at the China Spallation Neutron Source

An experimental muon source (EMuS) to provide a very intense muon beam has been studied at the China Spallation Neutron Source (CSNS) since 2007 and will be operational in the next few years. R&D efforts including a 128-channel muon spin rotation, relaxation, and resonance (μSR) spectrometer prototype are also ongoing. A data acquisition (DAQ) system was been developed to run the μSR spectrometer prototype on the EMuS. It includes front-end electronics (FEEs), time-to-digital converter (TDC) modules, and a DAQ software. The raw data acquired by the DAQ software were converted into a specific format and submitted to specialized analysis software for analysis. The DAQ system was tested on the ISIS muon beam, and the test results proved its performance.