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Wang, D.-J.

 
Paper Title Page
TUPMA034 Operation Experience of Top-up injection at Taiwan Light Source 151
 
  • G.-H. Luo, H.-P. Chang, C.-T. Chen, J. Chen, J.-R. Chen, C.-C. Kuo, K. S. Liang, Y.-C. Liu, R. J. Sheu, D.-J. Wang
    NSRRC, Hsinchu
  
  The storage ring of Taiwan Light Source (TLS) has one Superconducting (SC) cavity, one SC wavelength shifter, and two SC wigglers installed during last two years. The operation mode was also upgraded to have the capability of top-up injection. Top-up is an operation mode in which the beam current is maintained above certain level by frequent injections in the storage ring. The current stability maintains in the range of 10-3 for long period of operation. It provides constant thermal loading on all components in the storage ring and the optics components of beamlines, as well as constant signal to the beam position monitor. The top-up injection is a routine operation mode during user shifts at TLS. Statistics, operation experience and future expansion will be discussed in this paper.  
THZMA04 Status and Future of Taiwan Light Source 602
 
  • K. S. Liang, J.-R. Chen, C.-C. Kuo, G.-H. Luo, D.-J. Wang
    NSRRC, Hsinchu
  
  The Taiwan Light Source of National Synchrotron Radiation Research Center (NSRRC) has reached a very stable operation condition and productive scientific outputs. The copper Doris RF cavities were replaced with a niobium Superconducting (SC) RF cavity in order to eliminate higher-order-modes and deliver higher beam current. Superconducting wigglers were installed to provide higher flux at higher photon energy. The storage ring is now operated at 300 mA top-up mode with better than 97 % of beam availability during users shifts. The original layout of the magnets has been greatly modified to accommodate one SC wavelength shifter at the injection section, one SC wiggler at the RF cavity section, and three SC wigglers in achromatic sections in addition to the original design of one wiggler and three undulators. In view of the future scientific demands, the NSRRC is proposing to construct a new synchrotron storage ring of 3.0~3.3 GeV and ultra low emittance, the Taiwan Photon Source (TPS). The TPS will provide brilliant X-rays at 1021 photons/s/0.1%BW /mm2/mr2 by SC undulator upon its completion, making it the brightest synchrotron light with the finest performance in the world.  
slides icon Slides
THPMA081 Precise Positioning of Magnetic Field Centers of Quadrupole Magnets on the Girder 749
 
  • L. Tsai, T.-C. Fan, S. Y. Perng, D.-J. Wang
    NSRRC, Hsinchu
  
  Conventional alignment of quadrupole magnet on the girder is mainly based on the measurement of theodolite and fiducial. Most of the measurement errors come from human-eye resolution and fiducial precision. The resultant cumulative error could be in the order of 50~100μm. In this paper, pulsed wire method is proposed to align group of quadrupole magnets concentrically on one girder to precision about 10μm. In order to increase the alignment accuracy, sag problem in tension wire is replaced by a short wire with laser PSD system. Descriptions of the setup and test results are presented.

quadrupole magnet alignmentpsd

 
THPMA093 Vibration Evaluation for Utility Instruments and Water Piping System in TLS 776
 
  • Y.-H. Liu, J.-C. Chang, J.-R. Chen, D.-J. Wang
    NSRRC, Hsinchu
  
  In order to design the brightness new synchrotron light source-TPS in NSRRC. The vibration issue is more restrict nowadays. The position stability in subsystems is important to beam dynamic performance. The vibration source from utility systems is one source of the instability factor. The purpose of this paper is to estimate the vibration source from water systems, AHU systems and the piping system in utility group. Analysis the vibration path from ground and the piping system is the first step. Then, propose the feasible proposals to eliminate the vibration source and reduce the vibration propagation path. The construction standards for water systems and AHU systems will be established before design. The test is based on TLS operating systems. Besides, the distance and path between utility building and storage ring is another factor for vibration propagation. To eliminate the vibration source and propagation path in TLS will be the next step. The experimental results will be the foundation of TPS construction in the future.