Author: Tseng, T.C.
Paper Title Page
WEPME048 Adjusting and Calibration Method for TPS Laser PSD System 3037
 
  • M.L. Chen, J.-R. Chen, P.S.D. Chuang, H.C. Ho, K.H. Hsu, D.-G. Huang, W.Y. Lai, C.-S. Lin, C.J. Lin, H.C. Lin, H.M. Luo, S.Y. Perng, P.L. Sung, T.C. Tseng, H.S. Wang, M.H. Wu
    NSRRC, Hsinchu, Taiwan
  • J.-R. Chen
    National Tsing Hua University, Hsinchu, Taiwan
  
  Laser PSD po­si­tion­ing sys­tem is a part of the TPS girder auto-align­ment sys­tem and is de­signed for align­ing and po­si­tion­ing the straight-sec­tion gird­ers of TPS stor­age ring. Al­though the com­po­nents of Laser PSD sys­tem are fab­ri­cated, as­sem­bling and ad­just­ing pre­cisely in ad­vance, the ac­cu­racy of Laser PSD sys­tem is still in­flu­enced by girder fab­ri­cat­ing qual­ity, as­sem­bling er­rors and mov­ing er­rors by trans­porta­tion. For sys­tem cor­rec­tion, Laser beam po­si­tions on four sets of PSDs are for­mulized as an equa­tion and cal­i­brated with Laser tracker ul­ti­mately. Ac­cord­ing to the PSD cal­i­bra­tion for­mula, the two gird­ers of 18m long straight-sec­tion can be aligned and po­si­tioned within 20um by com­par­ing with Laser tracker. This paper de­scribes the as­sem­bly, in­stal­la­tion and cal­i­bra­tion process of Laser PSD sys­tem.  
 
WEPME049 An Application of Laser Position Sensing Detector for Magnet Centralizing System 3040
 
  • C.-S. Lin, J.-R. Chen, M.L. Chen, P.S.D. Chuang, H.C. Ho, K.H. Hsu, D.-G. Huang, C.K. Kuan, W.Y. Lai, C.J. Lin, H.C. Lin, H.M. Luo, S.Y. Perng, P.L. Sung, T.C. Tseng, H.S. Wang, M.H. Wu
    NSRRC, Hsinchu, Taiwan
  • J.-R. Chen
    National Tsing Hua University, Hsinchu, Taiwan
  
  Tai­wan Pho­ton Source (TPS) pro­ject has been pro­posed to cre­ate a 3GeV syn­chro­tron light source. The des­ig­nated ul­tra-low emit­tance of this new light source re­quires high pre­ci­sion po­si­tion­ing of stor­age ring mag­nets. The align­ment of all mag­nets is very im­por­tance since it di­rectly af­fects the closed orbit of elec­tron beams. Pre­vi­ously, con­ven­tional on-site align­ment of the mag­nets was mainly re­ly­ing on the theodo­lite per­for­mance. The cu­mu­lated er­rors could be in the order of 0.1mm. In this paper, a new align­ment scheme is pro­posed to en­hance the on-site align­ment of mag­nets for TPS pro­ject. To achieve the high pre­ci­sion re­quire­ments, a de­vice pos­sess­ing the ad­van­tages of ex­pan­sion man­drel in con­junc­tion with Po­si­tion Sens­ing De­tec­tor (PSD) is pro­posed. The de­vel­op­ment of this align­ment de­vice is an­tic­i­pated to pro­vide a bet­ter mech­a­nism to prop­erly align the cen­ters of the both quadru­pole and sex­tu­pole mag­nets on girder with less than 30μm po­si­tion­ing er­rors.  
 
WEPME050 Alignment Design and Status of Taiwan Photon Source 3043
 
  • W.Y. Lai, J.-R. Chen, M.L. Chen, P.S.D. Chuang, H.C. Ho, K.H. Hsu, D.-G. Huang, C.K. Kuan, C.-S. Lin, C.J. Lin, H.C. Lin, H.M. Luo, S.Y. Perng, P.L. Sung, T.C. Tseng, H.S. Wang, M.H. Wu
    NSRRC, Hsinchu, Taiwan
  • J.-R. Chen
    National Tsing Hua University, Hsinchu, Taiwan
  
  Tai­wan Pho­ton Source (TPS) is a new 3-GeV ring with char­ac­ter­is­tics of great bright­ness and small emit­tance, at pre­sent under con­struc­tion at Na­tional Syn­chro­tron Ra­di­a­tion Re­search Cen­ter (NSRRC) Tai­wan. The po­si­tion­ing of the mag­nets is highly sen­si­tive to align­ment er­rors, and the en­tire build­ing will be con­structed half un­der­ground at depth 12 m rel­a­tive to Tai­wan Light Source (TLS) for sta­bil­ity rea­sons; for these rea­sons the sur­vey and align­ment work is con­fined and dif­fi­cult. To po­si­tion mag­nets pre­cisely and quickly, a highly ac­cu­rate auto-tun­ing girder sys­tem com­bined with a sur­vey net­work was de­signed to ac­com­plish the align­ment tasks. The sur­vey net­work in­cludes a pre­lim­i­nary Global Po­si­tion­ing Sys­tem (GPS) net­work and a laser track­ing net­work. The po­si­tion data from the sur­vey net­work de­fine a basis for the sys­tem of mo­tor­ized gird­ers to auto-tune and to im­prove the ac­cu­racy. The de­tailed sur­vey and align­ment de­sign, in­stal­la­tion process is de­scribed in this paper.  
 
THPFI072 Heat Transfer Analysis of a Water-cooled Channel for the TPS Front End Components 3466
 
  • C.K. Kuan, J.-R. Chen, Y.T. Cheng, J.Y. Chuang, H.Y. Lin, P.A. Lin, Y.K. Liu, I.C. Sheng, T.C. Tseng
    NSRRC, Hsinchu, Taiwan
  • J.-R. Chen
    National Tsing Hua University, Hsinchu, Taiwan
  
  The masks, ab­sorbers and slits must with­stand the ex­tremely high power and power den­sity in the TPS front end. The ma­te­r­ial al­ways used is OFHC or Glid­cop. One so­lu­tion is to in­crease the cool­ing ef­fi­ciency of the wa­ter-cooled chan­nel in these com­po­nents. With the re­stric­tions of water pres­sure < 7 kg/cm2 and water flow ve­loc­ity < 3 m/s, the wire coil is cho­sen to en­hance the av­er­age heat- trans­fer co­ef­fi­cient and in­crease not too much the loss of water pres­sure. With a water chan­nel of di­am­e­ter 7.5 mm and wire coil in­serts of pitch 7.5 mm and wire di­am­e­ter 1 mm, the cool­ing ef­fi­ciency be­comes en­hanced 1.4 to 2 times in the com­po­nents of the TPS front end. The wire coils of var­ied pitches are sim­u­lated and cal­cu­lated in this work. We also com­pare our in­ves­ti­gated data with other ex­per­i­men­tal data of other au­thors.  
 
THPFI078 Design and Experiment on Auto-alignment Control System of Taiwan Photon Source 3475
 
  • M.H. Wu, J.-R. Chen, M.L. Chen, P.S.D. Chuang, H.C. Ho, K.H. Hsu, D.-G. Huang, W.Y. Lai, C.-S. Lin, C.J. Lin, H.C. Lin, H.M. Luo, S.Y. Perng, P.L. Sung, T.C. Tseng, H.S. Wang
    NSRRC, Hsinchu, Taiwan
  • J.-R. Chen
    National Tsing Hua University, Hsinchu, Taiwan
  
  TPS (Tai­wan Pho­ton Source) is a new 3-GeV syn­chro­tron ring to be con­structed at the NSRRC (Na­tional Syn­chro­tron Ra­di­a­tion Re­search Cen­ter), Tai­wan. There were hun­dreds of mag­nets that must be aligned on the ab­solute po­si­tion to keep the elec­tronic beam in the de­sire path while or­bit­ing. Due to the prob­lems of man­power, set up time, ac­cu­racy of ad­just­ment, de­for­ma­tion of the floor, lim­ited work­space and fre­quent earth­quakes in Tai­wan, an auto-align­ment girder con­trol sys­tem was de­signed to meet this re­quire­ment. The de­sign and ex­per­i­ment of the auto-align­ment sys­tem were tested suc­cess­fully in the lab­o­ra­tory at NSRRC. The ex­per­i­ment of the auto-align­ment con­trol sys­tem would be im­ple­mented with half of the ring gird­ers in the TPS. The de­tailed align­ment de­sign and sta­tus will be dis­cussed in this paper.