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Wang, M.-H.

Paper Title Page
MPPP034 Collective Effects in the TLS Storage Ring after the Installation of Superconducting RF Cavity 2360
 
  • P.J. Chou, J. Chen, K.-T. Hsu, C.-C. Kuo, C. Wang, M.-H. Wang
    NSRRC, Hsinchu
  
  A superconducting rf cavity designed by Cornell University was installed in the storage ring at Taiwan Light Source in December of 2004. The purpose of rf system upgrade is to achieve a stored beam current of 400 mA without collective instabilities caused by high-order-modes of rf cavities. Beam measurements related to collective effects are performed. Results are compared with those measured prior to the rf system upgrade. Theoretical studies on collective effects after the rf upgrade are also presented.  
RPAE047 Lattice Study for the Taiwan Photon Source 2989
 
  • C.-C. Kuo, H.-P. Chang, C.-T. Chen, G.-H. Luo, H.-J. Tsai, M.-H. Wang
    NSRRC, Hsinchu
  
  The feasibility study for the new 3.0~3.3 GeV Taiwan synchrotron light source, dubbed Taiwan Photon Source, was initiated in July, 2004. The goal is to construct a high performance light source with extremely bright X-ray in complementary to the existing 1.5 GeV light source in Taiwan. The ring circumference is 518.4 m and a 24-cell DBA lattice structure is chosen. The natural emittance with distributed dispersion is less than 2 nm-rad. A large booster ring of 499.2 m sharing the storage ring tunnel will be adopted.  
RPAE048 Design Consideration of a Booster for Taiwan Photon Source 2992
 
  • G.-H. Luo, H.-P. Chang, C.-C. Kuo, K.-K. Lin, H.-J. Tsai, M.-H. Wang
    NSRRC, Hsinchu
  
  After more than 10 years' operation and expansion, the Taiwan Light Source (TLS) of National Synchrotron Radiation Research Center (NSRRC) reaches very stable operation condition. The storage ring has better than 96% of beam availability annually with 6 Insertion Devices (ID) in a six-folds symmetry over-crowded machine. Two superconducting IDs and one superconducting RF cavity were installed in recent year, which intend to push the photon energy to hard x-ray regime and double the photon flux with better beam quality. Beamlines and experimental stations occupied all over the experimental area. The uproar for more beamlines in higher photon energy with higher brightness was frequently transpired from users' community. The Board of Trustee of NSRRC gave a green light to a new design and construction of median-energy light source, Taiwan Photon Source (TPS) in the coming decade. This paper will present two draft designs of booster and the consideration of the design criteria for new booster to work with a top-up injected and very low-emittance storage ring.  
RPAE049 Revision of Booster to Storage Ring Transport Line Design and Injection Scheme for Top-Up Operation at NSRRC 3085
 
  • M.-H. Wang, H.-P. Chang, J. Chen, J.-R. Chen, K.-T. Hsu, C.-C. Kuo, G.-H. Luo
    NSRRC, Hsinchu
  
  In order to help the operation of constant current, the optics of booster to storage ring transport line (BTS) design is reinvestigated. The initial twiss parameters are derived by measurement. The optics of the transport line is readjusted according to the measured initial beam parameters. The design of pulse width of the injection kicker is also changed from 1.2μsecond to 2.0μsecond. The injection scheme is reviewed and the effects of the kicker error on both injected beam and stored beam are investigated and shown in this report.  
RPAT058 The IEEE-1394 Digital Camera Application in the Taiwan Light Source
 
  • C.H. Kuo, K.-T. Hsu, M.-H. Wang
    NSRRC, Hsinchu
  
  The CCD camera with digital interface has been adopted for the diagnostics purpose recently. The long distance transmission with digital interface eliminates image distortion. Without frame grabber in the computer that is also another benefit. These applications include screen monitor and optical transition radiation monitor image for injection study, synchrotron radiation monitor of the booster synchrotron and storage ring. An intensified gated CCD camera is also applied for transient profile study. Wider dynamic range and the flexibility of the newly camera provide various functional enhancements for the diagnostics purpose. The effort and achievement will be summary in this report.