Commissioning of the Digital LLRF for CEBAF Injector/Separator
The design and production of the 499 MHz digital Low-Level RF control system for the CEBAF accelerator has been completed. The first five systems have been installed for use with the CEBAF Separator RF deflecting cavities operating at 499 MHz. The next four systems were installed in the injector on the chopping cavities (also 499 MHz deflecting cavities). The new LLRF system replaced an analog system that was over 15 years old. For initial testing, an extensive acceptance plan along with a LLRF test stand was developed and incorporated to assure system performance as well as reliability. Various VHDL firmware was developed to support operation of this system and included specific operational diagnostics. Once the acceptance tests were completed, the new systems were installed in the accelerator in parallel with the existing analog LLRF for extensive in-situ testing and comparison. Once commissioned,, the new RF systems were assigned to the CEBAF accelerator and turned over to Accelerator Operations. This paper will address the VHDL firmware evolution, the automated tests, and the performance measurements made throughout the installation and commissioning process.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE - Office of Energy Research (ER)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 889366
- Report Number(s):
- JLAB-ACE-06-528; DOE/ER/40150-4005; TRN: US0604436
- Resource Relation:
- Conference: LINAC 2006, 21-25 Aug 2006, Knoxville, Tennessee
- Country of Publication:
- United States
- Language:
- English
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