APT LLRF control system functionality and architecture

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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 ... continued below

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6 p.

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Regan, A.H.; Rohlev, A.S. & Ziomek, C.D. September 1, 1996.

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Description

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

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6 p.

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INIS; OSTI as DE96014624

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  • 18. international linac conference, Geneva (Switzerland), 26-30 Aug 1996

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  • Other: DE96014624
  • Report No.: LA-UR--96-2849
  • Report No.: CONF-9608123--4
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 382424
  • Archival Resource Key: ark:/67531/metadc688384

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  • September 1, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 25, 2016, 1:24 p.m.

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Regan, A.H.; Rohlev, A.S. & Ziomek, C.D. APT LLRF control system functionality and architecture, article, September 1, 1996; New Mexico. (digital.library.unt.edu/ark:/67531/metadc688384/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.