Calibration of the linear optics in the SSRF storage ring

Calibration of the linear optics in the SSRF storage ring 1 2 first-author 1 corresp Corresponding author. E-mail address: liugm@sinap.ac.cn Corresponding author. E-mail address: liugm@sinap.ac.cn liugm@sinap.ac.cn 1 1 1 2 1 1 2 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China Graduate University of the Chinese Academy of Sciences, Beijing 100049, China Graduate University of the Chinese Academy of Sciences, Beijing 100049, China Phase I commissioning of the SSRF storage ring at 3.0 GeV was ended with encouraging results. Distortions and calibrations of the linear optics during the storage ring commissioning are discussed in this paper. The calibration procedure has reduced sextupole-additional focusing effects by minimizing closed orbit deviation and corrected quadrupole magnetic coefficients with the linear optics from closed orbit (LOCO) technique. After fitting the closed orbit response matrix, linear optics of the storage ring is substantially corrected, and the measured parameters agree well with the design. Four optics modes were commissioned, and relevant machine physics studies were carried out. Their results are summarized. SSRF storage ring Linear optics Commissioning Calibration References Zhao Z T , Xu H J , Ding H . Construction of Shanghai synchrotron radiation facility . Proceedings of APAC , Indore, India , 2007 , 593 - 596 . Construction of Shanghai synchrotron radiation facility Liu G M , Dai Z M , Li H H , et al . HEP & NP , 2006 , 30 ( Supp. I ): 144 - 146 . HEP & NP Xu H J , Zhao Z T . Nucl Sci Tech , 2008 , 19 : 1 - 6 . Nucl Sci Tech Liu G M , Li H H , Zhang W Z , et al . Commissioning of the SSRF storage ring . In: Proceedings of EPAC . Genoa, Italy : 2008 , 2079 - 2081 . Commissioning of the SSRF storage ring Robin D , Safranek J , Decking W . Phys Rev ST AB , 1999 , 2 : 044001 . Phys Rev ST AB Zhao Z T . Commissioning of new synchrotron radiation facilities . In: Proceedings of PAC . Albuquerque, New Mexico, USA : 2007 , 17 - 21 . Commissioning of new synchrotron radiation facilities Portmann G , Robin D , Schachinger L . Automated beam based alignment of the ALS quadrupoles . In: Proceedings of PAC . Dallas, Texas, USA : 1995 , 2693 - 2695 . Automated beam based alignment of the ALS quadrupoles Chung Y , Decker G , Evans K . Closed orbit correction using singular value decomposition of the response matrix . In: Proceedings of PAC . Washington D. C., USA : 1993 , 2263 - 2265 . Closed orbit correction using singular value decomposition of the response matrix Safranek J . Nucl Instrum Methods Phys Res A , 1997 , 388 : 27 - 36 . Nucl Instrum Methods Phys Res A Martin I P S , Bortolini R , Fielder R , et al . Electron beam dynamics studies during commissioning of the diamond storage ring . In: Proceedings of PAC . Albuquerque, New Mexico, USA : 2007 , 1115 - 1117 . Electron beam dynamics studies during commissioning of the diamond storage ring Nadji A , Besson J C , Bouvet F , et al . Commissioning and Performance of Soleil . In: Proceedings of PAC . Albuquerque, New Mexico, USA : 2007 , 932 - 934 . Commissioning and Performance of Soleil Spencer M J , Boland M J , Dowd R T , et al . LOCO at the Australian Synchrotron . In: Proceedings of PAC . Albuquerque, New Mexico, USA : 2007 , 3217 - 3219 . LOCO at the Australian Synchrotron Smith S L . Optimization of modern light source lattices . In: Proceedings of EPAC . Paris, France : 2002 , 44 - 48 . Optimization of modern light source lattices Tian S Q , Hou Jie , Chen G L et al . Chin Phys C (HEP & NP) , 2008 , 32 : 661 - 664 . Chin Phys C (HEP & NP) Terebilo A . Accelerator Toolbox for MATLAB. In: SLAC-PUB-8732 . Accelerator Toolbox for MATLAB. In: SLAC-PUB-8732 10.1016/S1001-8042(09)60001-4 TL5 Supported by the SSRF project 2008-07-02 2008-10-20 2021-01-19 2008 Nuclear Science and Techniques 05 19