Speaker
Description
In the MEBT section of the China Spallation Neutron Source Phase II project, eight strip-type beam position monitor are deployed for precise transverse beam position measurement. The original system employed Bergoz LRBPM electronics modules and NI 1.25 MSPS multifunction data acquisition cards, with upper-layer software developed on the LabVIEW platform to realize orbit measurement functions. The new system described in this paper replaces the NI cards with self-developed 20MSPS high-speed data acquisition cards. The signal readout and processing part is built as a hard IOC based on the EPICS Base framework, completing signal acquisition, real-time processing, and beam orbit data output. Under the standard EPICS IOC architecture, asynchronous mode is utilized to achieve synchronized acquisition of the differential Xout/Yout output signals from the Bergoz LRBPM electronics, while EPICS standard record types are used for data processing and orbit calculation. The system features a clear software hierarchy and stable operational performance.
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