APT LLRF control system functionality and architecture

Conference · Sun Sep 01 04:00:00 EDT 1996

OSTI ID:382424

Regan, A H; Rohlev, A S ^[1]; Ziomek, C D ^[2]

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1. Los Alamos National Lab., NM (United States)
2. B and B Technologies (United States)

1% amplitude and l{degree} phase. The feedback control system requires a phase-stable RF reference subsystem signal to correctly phase each cavity. Also, instead of a single klystron RF source for individual accelerating cavities, multiple klystrons will drive a string of resonantly coupled cavities, based on input from a single LLRF feedback control system. To achieve maximum source efficiency, we will be employing single fast feedback controls around individual klystrons such that the gain and phase characteristics of each will be ``identical.`` In addition, resonance control is performed by providing a proper drive signal to structure cooling water valves in order to keep the cavity resonant during operation. To quickly respond to RF shutdowns, and hence rapid accelerating cavity cool- down, due to RF fault conditions, drive frequency agility in the main feedback control subsystem will also be incorporated. Top level block diagrams will be presented and described for each of the aforementioned subsystems as they will first be developed and demonstrated on the Low Energy Demonstrator Accelerator (LEDA) The low-level RF (LLRF) control system for the Accelerator Production of Tritium (APT) will perform various functions. Foremost is the feedback control of the accelerating fields within the cavity in order to maintain field stability within

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 382424
• Report Number(s): LA-UR--96-2849; CONF-9608123--4; ON: DE96014624
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPE AND RADIATION SOURCES
42 ENGINEERING
43 PARTICLE ACCELERATORS
ACCELERATORS
CAVITY RESONATORS
CONTROL SYSTEMS
DESIGN
FEEDBACK
ISOTOPE PRODUCTION
KLYSTRONS
POWER AMPLIFIERS
RF SYSTEMS
TRITIUM