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Chao, H. C.

Paper Title Page
WEPC004 Design Status of the Taiwan Photon Source 1986
 
  • C.-C. Kuo, H.-P. Chang, H. C. Chao, P. J. Chou, K. S. Liang, W. T. Liu, G.-H. Luo, A. Rusanov, H.-J. Tsai, J. W. Tsai
    NSRRC, Hsinchu
 
  We report updated design works for a new 3-3.3 GeV synchrotron light source called Taiwan Photon Source (TPS). The lattice type of the TPS is a 24-cell DBA structure and the circumference is 518.4 m. The injector booster will be housed in the same tunnel. We present the lattice design, the accelerator physics issues and its expected performances.  
WEPC005 Design Considerations of the TPS Linac-to-booster Transfer Line 1989
 
  • H.-P. Chang, H. C. Chao, K. T. Hsu, S. Y. Hsu, D.-G. Huang, C.-C. Kuo, K.-K. Lin, W. T. Liu, Y.-C. Liu
    NSRRC, Hsinchu
 
  Design considerations of the linac to booster (LTB) transfer line for Taiwan Photon Source (TPS) project is described in this report. Electron beam from the linac with 150 MeV, 50 π-mm-mrad normalized emittance and 0.5% energy spread will be transferred to a booster synchrotron of 489.6 m. This LTB transfer line is designed with the flexible tuning capability and the diagnostics are included. Matching of transverse beam parameters from linac to booster is deliberated. The on-axis injection scheme with repetition rate around 2 or 3 Hz and efficiency with beta-mismatch for top-up operation is also studied.  
THPC005 Conceptual Design of Booster Synchrotron forTPS 2981
 
  • H. C. Chao, H.-P. Chang, P. J. Chou, C.-C. Kuo, G.-H. Luo, H.-J. Tsai, J. W. Tsai
    NSRRC, Hsinchu
 
  A six-folded concentric booster of 489.6 m with non-dispersive straights of length 5.8 m is designed for TPS storage ring of 518.4 m. The structure consists of modified FODO lattice with defocusing quadrupole fields built in bending magnets. The designed emittance is less than 10 nm-rad at 3 GeV. In this paper, the phenomenon during the ramping from 150 MeV to 3.0 GeV including the eddy current effect, the evolutions of beam emittance, energy spread, and bucket acceptance, will be discussed. In addition, closed orbit correction scheme, aperture request as well as injection and extraction schemes are described.  
THPC041 Closed Orbit Correction and Orbit Stabilization Control for TPS Storage Ring 3068
 
  • H.-J. Tsai, H.-P. Chang, H. C. Chao, P. J. Chou, K. T. Hsu, C.-C. Kuo, W. T. Liu, J. W. Tsai
    NSRRC, Hsinchu
 
  TPS is a 3 GeV synchrotron storage ring proposed in Taiwan. The designed natural emittance with slightly positive dispersion in the straight sections is less than 2 nm-rad. With 1% emittance coupling, the beam size in horizontal and vertical plane are 120/5 micron in the short straight sections, respectively. The beam position stability requirements are 10% of the beam sizes, i.e., 12/0.5 micron in the horizontal/vertical plane. The closed orbit distortions due to alignment displacement and magnetic field errors are simulated. The distribution of beam position monitors and the location of slow and fast correctors are proposed and the level of achievement is shown.