Keyword: high-voltage
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TUPO007 FRIB Fast Machine Protection System: Chopper Monitor System Design controls, FPGA, machine-protect, power-supply 336
 
  • Z. Li, D. Chabot, S. Cogan, S.M. Lidia, R.C. Webber
    FRIB, East Lansing, USA
 
  Funding: Work supported by Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661.
The Facility for Rare Isotope Beams tunes the beam power from 0 to 400KW by chopping the beam current with a beam chopper in the Low Energy Beam Transport. A chopper monitoring system is employed to verify proper chopper operation to avoid delivery of undesired high-powered beam and to inhibit beam for machine protection purposes. The system monitors the incoming beam gate time structure, the chopper switch high voltage pulses, the chopper electrode charge/discharge currents, and the status of machine protection system. It is designed to switch off the beam within tens of nanoseconds of a detected fault. Chal-lenges include a dynamic beam gate pulse structure with pulse lengths as short as 0.6 µs and high voltage power supply current pulses of ~25 ns. A high speed "integrate and hold circuit with reset", Field Program-mable Gate Array based digital control circuit and high speed ADC circuit were developed to fulfil the re-quired functions. Design approach, simulation, and test results with the beam are the focus of this paper.
 
slides icon Slides TUPO007 [1.082 MB]  
poster icon Poster TUPO007 [1.321 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TUPO007  
About • paper received ※ 12 September 2018      issue date ※ 18 January 2019  
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THPO093 Status and Results Obtained on a RF Conditioning Test Bench for 704 MHz Couplers in the Frame of ESS Project klystron, status, cathode, gun 895
 
  • S. Sierra, Y. Amal, Ch.L. Lievin, I. Yao Leclerc
    TED, Velizy-Villacoublay, France
  • M.E. Chahbazian, J.G. DeOliveira, A.G. Goeury, L.J. Nennig, S.P. Petitjean
    GERAC Thales, Le Barp, France
 
  Thales and Gerac are developing a test bench able to make the RF conditioning of the Fundamental Power Couplers at 704 MHz in the frame of the ESS project for CEA. The status of the developments of the test bench is described including the modulator, klystron and all relative equipments. The paper will also describes the results obtained at the date of presentation.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-THPO093  
About • paper received ※ 10 September 2018      issue date ※ 18 January 2019  
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