Author: Lee, T.-Y.
Paper Title Page
MOPMR002 Bunch by Bunch Position Measurement and Analysis at PLS-II 232
 
  • J. Lee, M.-H. Chun, I. Hwang, D.T. Kim, G. Kim, T.-Y. Lee, D.C. Shin, S. Shin
    PAL, Pohang, Kyungbuk, Republic of Korea
 
  Beam dynamic phenomena described by bunch-by-bunch motion are important issues for a storage ring and are described by various theoretical formalisms. Direct measurements of the beam position related to different dynamical mechanisms are a useful information to accelerator optimization. In PLS-II, 20 GHz sampling oscilloscope synchronized with injection event (or triggered by beam loss signal) is used to measure direct bunch by bunch motion. Based on the measured data, the principal component analysis had been performed to get the insight into beam dynamic phenomena such as couple bunch instability and beam oscillation due to kicker leakage. In this paper, we will describe the measurement method and the result of analysis for coupled bunch instability.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMR002  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPOY042 Schemes for the Accelerator-driven System 1995
 
  • T.-Y. Lee, H.-S. Lee, S. Shin
    PAL, Pohang, Kyungbuk, Republic of Korea
 
  Accelerator-Driven system (ADS) is considered the fu-ture nuclear reactor. In principle, it is safer and creates less waste than the conventional nuclear reactor, and provides the transmutation function that converts spent fuel into short-lived elements. However, to fully realize this system, a huge proton accelerator (typically, 1 GeV beam energy and over 10 MW beam power) with ex-tremely high operational stability is necessary. This paper discusses how the currently available technology can be applied for nuclear transmutation.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOY042  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPOR004 Fast Orbit Feedback System at the Pls-Ii Storage Ring 2667
 
  • S.-C. Kim, W.S. Cho, C. Kim, J.M. Kim, K.R. Kim, E.H. Lee, J. Lee, J.W. Lee, T.-Y. Lee, C.D. Park, G.S. Park, S. Shin, J.C. Yoon
    PAL, Pohang, Kyungbuk, Republic of Korea
 
  Funding: This work is supported by the Ministry of science, ICT and Future Planning, Korea.
The transverse position of the electron beam in the Pohang Light Source-II (PLS-II) is stabilized by the global orbit feedback system. Currently, 2 Hz slow orbit feedback (SOFB) system is operating, and 1 kHz fast orbit feedback (FOFB) system is installed recently. This FOFB system is consists of 96 electron beam position monitors (BPMs), 48 horizontal fast correctors, 48 vertical fast correctors and VME control system. We present the design and implementation of the FOFB system and its test result. Analysis through the simulation is presented and future improvement is discussed
 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOR004  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
THPMB030 Operation Improvement by Tuning of Storage Ring at PLS-II 3297
 
  • I. Hwang, M. Kim, T.-Y. Lee, C.D. Park
    PAL, Pohang, Kyungbuk, Republic of Korea
 
  After upgrade of the pohang light source (PLS-II), several problems reduced the quality of the top-up operation. Unbalance of the injection kicker system and it's lack of control had limited the efficiency of the injection from the linac to the storage ring. We tuned the storage ring to improve the injection efficiency and to stabilize the orbit during the injection.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMB030  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)