Keyword: interface
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MOPO041 Performance Test Results of Magnet Power Supply controls, FPGA, power-supply, experiment 118
 
  • K.-H. Park, J.H. Han, S.-H. Jeong, Y.G. Jung, D.E. Kim, M.J. Kim, H.-G. Lee, S.B. Lee, B.G. Oh, H.S. Suh
    PAL, Pohang, Kyungbuk, Republic of Korea
 
  A high stable magnet power supply (MPS) was developed, which was a bipolar type with 200A of the output current at the 40V of output voltage. The MPS has been implemented by the digital signal processing technology using the DSP, FPGA, ADCs and so on. The output current stability of the MPS showed about 6ppm peak-to-peak in a short term experiment at 200A of its full output current. The long term stability was shown in 15 ppm peak-to-peak for 10 hours at 200A. And the others experimental results about the MPS were shown in this paper.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-MOPO041  
About • paper received ※ 31 August 2018      issue date ※ 18 January 2019  
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MOPO066 Simulation of the Transitional Process in Accelerating Sections by Equivalent Circuit Method coupling, operation, MMI, distributed 145
 
  • S.V. Matsievskiy, V.I. Kaminskiy, Ya.V. Shashkov
    MEPhI, Moscow, Russia
 
  Nowadays linac accelerating RF systems design is usually done by the finite difference method. It provides high accuracy of calculations and freedom in topology choosing, but may draw considerable amounts of computer resources with long calculation times. Alternative to this method, equivalent circuit method exists. The basic idea of this method is to build a lumped element circuit, which with certain approximation acts as an original accelerating cell. It drastically reduces the number of equations to solve. This method is long known but usually only used for the particular accelerating structures when speed of calculation is a key-factor. Present paper describes a way to numerically simulate transition processes in arbitrary coupled accelerating cells using the equivalent circuit method. This approach allows simulating transitional processes in accelerating structures significantly faster and allows doing so for structures with high quality factor and many cells - a hard task for conventional transient solvers based on the finite difference method.  
poster icon Poster MOPO066 [0.519 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-MOPO066  
About • paper received ※ 23 August 2018      issue date ※ 18 January 2019  
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MOPO081 Light Proton Therapy Linac LLRF System Development LLRF, controls, cavity, proton 171
 
  • B.B. Baricevic, A. Bardorfer, R. Cerne
    I-Tech, Solkan, Slovenia
  • G. De Michele, Ye. Ivanisenko
    AVO-ADAM, Meyrin, Switzerland
 
  Proton cancer therapy is a state-of-the-art medical treatment technique based on an accelerator beam production facility. The LIGHT linear accelerator design by AVO-ADAM offers a modular compact solution for precise control of the treatment dose delivery, both position and energy wise. Proton energy can be modulated at up to 200 Hz in a range from 70 to 230 MeV by varying the gradient of the accelerating structures. The normal conducting LINAC RF system is based on a 750 MHz RFQ and 12 S band stations individually controlled. A customized LLRF system is being developed on the Libera LLRF platform for the LIGHT project. The paper is describing the required cavity field control functionality and the other subsystems such as master oscillator reference, cavity tuning, real-time control, data acquisition, control system and synchronization interfaces.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-MOPO081  
About • paper received ※ 11 September 2018      issue date ※ 18 January 2019  
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MOPO089 Design Details of the European Spallation Source Drift Tube LINAC DTL, vacuum, GUI, linac 190
 
  • P. Mereu, M. Mezzano, C. Mingioni, M. Nenni
    INFN-Torino, Torino, Italy
  • G. Cibinetto
    INFN-Ferrara, Ferrara, Italy
  • F. Grespan, A. Pisent
    INFN/LNL, Legnaro (PD), Italy
 
  The Drift Tube Linac (DTL) of the European Spallation Source (ESS) is designed to operate at 352.2MHz with a duty cycle of 4% (3 ms pulse length, 14 Hz repetition period) and will accelerate a proton beam of 62.5mA pulse peak current from 3.62 to 90 MeV. This paper gives a detailed overview of the ESS-DTL current mechanical design, and the related driving criteria. It presents also an outlook of the main aspects of the assembly and installation, with related equipments, toolings and procedures.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-MOPO089  
About • paper received ※ 12 September 2018      issue date ※ 18 January 2019  
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THPO045 Tuning Esperience on the ESS DTL Cold Model DTL, cavity, resonance, alignment 784
 
  • F. Grespan, A. Baldo, P. Bottin, G.S. Mauro, A. Palmieri, A. Pisent
    INFN/LNL, Legnaro (PD), Italy
  • P. Mereu, M. Mezzano
    INFN-Torino, Torino, Italy
 
  An aluminum model of the ESS DTL tank 2 has been delivered to INFN-LNL in december 2017. The tank is 7.1 m long, equipped with movable tuners and movable post couplers. The purpose of this DTL model is to verify the RF design choices (in particular on the first 2 tanks where the Post coupler distribution is irregular) as well as implement and debug algorithms and procedure for stabilization and tuning. The preparatory simulation work and the results of measurements campaign are here presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-THPO045  
About • paper received ※ 12 September 2018      issue date ※ 18 January 2019  
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