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Kim, D.T.

Paper Title Page
WPAT015 The Digital Feedback RF Control System of the RFQ and DTL1 for 100 MeV Proton Linac of PEFP 1443
 
  • I.H. Yu, Y.J. Han, H.-S. Kang, D.T. Kim, S.-C. Kim, I.-S. Park, J.C. Yoon
    PAL, Pohang, Kyungbuk
  • Y.-S. Cho, H.-J. Kwon, K.T. Seol
    KAERI, Daejon
 
  Funding: Work supported by the PEFP (Proton Engineering Frontier Project), Korea

The 100 MeV Proton linear accelerator (Linac) for the PEFP (Proton Engineering Frontier Project) will include 1 RFQ and 1 DTL1 at 350 MHz as well as 7 DTL2 cavities at 700 MHz. The low level RF system with the digital feedback RF control provides the field control to accelerate a 20mA proton beam from 50 keV to 20 MeV with a RFQ and a DTL1 at 350M Hz. The FPGA-based digital feedback RF control system has been built and is used to control cavity field amplitude within ± 1% and relative phase within ± 1°. The fast digital processing is networked to the EPICS-based control system with an embedded processor (Blackfin). In this paper, the detailed description of the digital feedback RF control system will be described with the performance test results.

 
RPAT008 Prototype Digital Beam Position and Phase Monitor for the 100-MeV Proton Linac of PEFP 1120
 
  • I.H. Yu, D.T. Kim, S.-C. Kim, I.-S. Park, S.J. Park
    PAL, Pohang, Kyungbuk
  • Y.-S. Cho
    KAERI, Daejon
 
  Funding: Work supported by the PEFP (Proton Engineering Frontier Project), Korea.

The PEFP (Proton Engineering Frontier Project) at the KAERI (Korea Atomic Energy Research Institute) is building a high-power proton linear accelerator aiming to generate 100-MeV proton beams with 20-mA peak current (pulse width and max. repetition rate of 1 ms and 120 Hz respectively). We are developing a prototype digital BPPM (Beam Position and Phase Monitor) for the PEFP linac utilizing the digital technology with field programmable gate array (FPGA). The RF input signals are down converted to 10 MHz and sampled at 40 MHz with 14-bit ADC to produce I and Q data streams. The system is designed to provide a position and phase resolution of 0.1% and 0.1? RMS respectively. The fast digital processing is networked to the EPICS-based control system with an embedded processor (Blackfin). In this paper, the detailed description of the prototype digital beam position and phase monitor will be described with the performance test results.

 
RPAT054 Beam Position Monitor at the PLS BTL 3289
 
  • S.-C. Kim, M.-H. Chun, Y.J. Han, J.Y. Huang, D.T. Kim, W.W. Lee
    PAL, Pohang, Kyungbuk
 
  Funding: Work supported by the Ministry of Science and Technology, Korea.

Electron Linac at the Pohnag Accelerator Laboratory (PAL) has been operated continuously as the full energy injector for storage ring. Linac and storage ring energy has been 2.0 GeV since Dec. 1994, and 2.5 GeV since Oct. 2002. In Aug. 2004, thirteen BPMs are newly installed at BTL(Beam Transport Line) for beam trajectory measurement and feedback. These BPMs consist of 100mm strip-line electrodes in 150mm long chamber, and 500MHz log-ratio signal processing circuits. BPM data acquisition system is developed as EPICS IOC using NI S-series data acquisition board and NI LabView 7.1. BTL BPMs will be used for optic correction and beam energy feedback for PLS beam injection. This paper describes on design, test results, installation and data acquisition system of the PLS BTL BPM.