CONTROL SYSTEM ANALYSIS FOR THE PERTURBED LINEAR ACCELERATOR RF SYSTEM

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This paper addresses the modeling problem of the linear accelerator RF system in SNS. Klystrons are modeled as linear parameter varying systems. The effect of the high voltage power supply ripple on the klystron output voltage and the output phase is modeled as an additive disturbance. The cavity is modeled as a linear system and the beam current is modeled as the exogenous disturbance. The output uncertainty of the low level RF system which results from the uncertainties in the RF components and cabling is modeled as multiplicative uncertainty. Also, the feedback loop uncertainty and digital signal processing signal conditioning ... continued below

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805 Kilobytes pages

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KWON, SUNG-IL & REGAN, AMY H. April 10, 2002.

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Description

This paper addresses the modeling problem of the linear accelerator RF system in SNS. Klystrons are modeled as linear parameter varying systems. The effect of the high voltage power supply ripple on the klystron output voltage and the output phase is modeled as an additive disturbance. The cavity is modeled as a linear system and the beam current is modeled as the exogenous disturbance. The output uncertainty of the low level RF system which results from the uncertainties in the RF components and cabling is modeled as multiplicative uncertainty. Also, the feedback loop uncertainty and digital signal processing signal conditioning subsystem uncertainties are lumped together and are modeled as multiplicative uncertainty. Finally, the time delays in the loop are modeled as a lumped time delay. For the perturbed open loop system, the closed loop system performance, and stability are analyzed with the PI feedback controller.

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805 Kilobytes pages

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  • Other Information: PBD: 10 Apr 2002

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  • Report No.: LA-UR-02-2100
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/810037 | External Link
  • Office of Scientific & Technical Information Report Number: 810037
  • Archival Resource Key: ark:/67531/metadc739806

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  • April 10, 2002

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  • Oct. 18, 2015, 6:40 p.m.

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  • March 11, 2016, 5:24 p.m.

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KWON, SUNG-IL & REGAN, AMY H. CONTROL SYSTEM ANALYSIS FOR THE PERTURBED LINEAR ACCELERATOR RF SYSTEM, report, April 10, 2002; New Mexico. (digital.library.unt.edu/ark:/67531/metadc739806/: accessed June 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.