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Song, Y.-G.

Paper Title Page
MOPAN058 Control System for PEFP Instruments with Modbus Protocol 284
 
  • I.-S. Hong, Y.-G. Song
    KAERI, Daejon
  
  Funding: This work was supported by the 21C Frontier R&D program sponsored by Ministry of Science and Technology, Korean Government.

20MeV proton linear accelerator of the PEFP(Proton Engineering Frontier Project) has above 10 magnet power supplies and getter pumps to interface with Modbus protocol. VME IOC(Input Output Controller) has been designed and constructed for the control system by using VME serial I/O. The driver support module of the VME IOC has been developed to initialize the IO board and communicate with the instruments through EPICS. Operating console and storage module for operators in the control room has been programmed on PC and SUN of the operator interface.

 
MOPAN059 PEFP Monitoring System Through an Analog Input to Ethernet Converter 287
 
  • Y.-G. Song, Y.-S. Cho, I.-S. Hong
    KAERI, Daejon
  
  Funding: This work was supported by the 21C Frontier R&D program sponsored by Ministry of Science and Technology, Korean Government.

Proton Engineering Frontier Project (PEFP) has above 40 magnet power supplies for the 20MeV proton linac. Because some power supplies have analog interfaces, we chose ATEC (Analog Input To Ethernet Converter) to monitor their output currents and voltage by supporting the protocol conversion function. Software components of the Experimental Physics and Industrial Control System (EPICS) have been ported to a VME single board computer based on a PowerPC microprocessor (MPC7410). This paper presents the software component and processing of analog input values between EPICS on the PowerPC based board and ATEC operating as Server Mode.

 
WEPMN057 Development of the PEFP Low Level RF Control System 2167
 
  • H. S. Kim, Y.-S. Cho, I.-S. Hong, D. I. Kim, H.-J. Kwon, K. T. Seol, Y.-G. Song
    KAERI, Daejon
  
  Funding: This work is supported by the 21C frontier R&D program in the Ministry of Science and Technology of the Korean government.

The RF amplitude and the phase stability requirements of the LLRF system for the PEFP(Proton Engineering Frontier Project) proton linac are within 1% and 1 degree, respectively. As a prototype of the LLRF, a simple digital PI control system based on commercial FPGA board is designed and tested. The main features are a sampling rate of 40 MHz which is four times higher than the down-converted cavity signal frequency, digital in-phase and quadrature detection, pulsed mode operation with the external trigger, and a simple proportional-integral feedback algorithm implemented in a FPGA. The developed system was tested with 3 MeV RFQ and 20 MeV DTL, and satisfied the stability requirements.