First neutron data recorded at the V20 Test Instrument utilizing prototype chopper systems and beam monitors planned for ESS

TL;DR

This paper reports the first neutron data recorded at the V20 Test Instrument using prototype chopper systems and beam monitors, demonstrating successful integration and validation of ESS hardware and software components.

Contribution

It presents the first successful neutron data collection at V20 with prototype ESS chopper and detector systems, validating the integration architecture.

Findings

Successful control of ESS chopper prototype via CHIC and EPICS

Neutron data collected and timestamped accurately

Chopper stability and neutron absorption characteristics confirmed

Abstract

The main objective of the European Spallation Source (ESS) is to perform consistently high impact neutron scattering science using the highest neutron flux of any facility in its class. This ambition is naturally accompanied by operational challenges related to the vertical integration of the instruments' hardware and software shared between collaborators from 13 European countries. The present work will detail integration tests performed at the V20 Test Instrument at Helmholtz-Zentrum Berlin in Germany. An ESS chopper prototype was successfully controlled through the ESS Chopper Integration Controller (CHIC) and Experimental Physics and Industrial Control System (EPICS). Neutron data were successfully collected and time stamped using neutron beam monitors, the ESS prototype detector readout electronics and the Data Management Software Center (DMSC) data acquisition (DAQ) software. Chopper rotation events were timestamped and the chopper disk showed excellent stability and neutron absorption characteristics. The test resulted in (i) the expected time-of-flight (TOF) response, (ii) collected data that compared well with instrument reference data and (iii) revealing the diagnostic power of the performed integration tests. The results of this integration test validate the ESS chopper and detector DAQ architecture choices.