Software Development for APS-Upgrade LLRF

TL;DR

This paper describes the development of a comprehensive, real-time, service-based software system for data acquisition and control in the APS accelerator upgrade, supporting multiple hardware platforms and advanced visualization tools.

Contribution

It introduces a new EPICS 7-based DAQ system with multi-platform support and real-time visualization for LLRF systems in the APS upgrade.

Findings

Successful integration of EPICS 7 IOC applications for LLRF hardware

Real-time data collection and visualization capabilities implemented

Support for multiple hardware platforms including LLRF4 and MTA

Abstract

An extensive service-based software system has been developed for real-time data acquisition (DAQ) on numerous subsystems of the Advanced Photon Source (APS) accelerator. The software, called DAQ, is based upon EPICS 3 Area-Detector with added EPICS 4 services, with EPICS 3 + 4 being called EPICS 7. DAQ is comprised of several network services including file storage and processing as well as numerous EPICS 7 Input-Output Controller (IOC) applications that collect data and publish to EPICS 7 from accelerator subsystems, including power supplies, diagnostics, timing, and RF systems. For the APS upgrade extensions to the DAQ software have been developed for digital Low Level RF (LLRF) systems supporting multiple hardware platforms including Lawrence Berkeley Laboratory's LLRF4 hardware and Micro Telecommunications Computing Architecture. EPICS 7 IOCs for LLRF run on multiple threads for real-time data collection, visualization , system control, and data file storage that can be triggered on accelerator beam dumps for system debug. A Python-based oscilloscope application has been developed for real-time data visualization.