First SELAP Algorithm Operational Experience of the New LLRF 3.0 RF Control System

Conference · Sat Oct 01 00:00:00 EDT 2022

DOI:https://doi.org/10.18429/JACoW-LINAC2022-THPOPA24· OSTI ID:1903605

Plawski, T. E. ^[1]; Bachimanchi, R. ^[1]; Higgins, S. ^[1]; Hovater, C. ^[1]; Latshaw, J. ^[1]; Mounts, C. I.

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1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

The JLAB LLRF 3.0 system has been developed and is replacing the 30-year-old LLRF systems in the CEBAF accelerator. The LLRF system builds upon 25 years of design and operational RF control experience (digital and analog), and our recent collaboration in the design of the LCLSII LLRF system. The new system also incorporates a cavity control algorithm using a fully functional phase and amplitude locked Self Exciting Loop (SELAP). The first system (controlling 8 cavities) was installed and commissioned in August of 2021. Since then the new LLRF system has been operating with cavity gradients up to 20 MV/m, and electron beam currents up to 350 uA. This paper discusses the operational experience of the LLRF 3.0 SELAP algorithm along with other software and firmware tools like cavity and klystron characterization and quench detection.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1903605
• Report Number(s): JLAB-ACE-22-3710; DOE/OR/23177-5602; SC0005264
• Resource Relation: Conference: LINAC 2022, Liverpool, UK, 28 August-02 September 2022
• Country of Publication: United States
• Language: English