Author: Kongtawong, S.
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THPMR048 Analysis of Nonlinear Effects for IDs at the SPS Storage Ring 3512
  • S. Krainara, P. Klysubun, S. Kongtawong, T. Pulampong, P. Sudmuang, P. Sunwong
    SLRI, Nakhon Ratchasima, Thailand
  Funding: Synchrotron Light Research Institute (Public Organization)
To generate intense and high energy synchrotron radiation at the Siam Photon Source (SPS) 1.2 GeV storage ring, two insertion devices (IDs), namely, a 2.2 T hybrid multipole wiggler (MPW) and a 6.5 T superconducting wavelength shifter (SWLS), have been installed and operated since 2013. The angular kicks due to the nonlinear effects generated by the IDs represented by kick maps were used in our analysis. The optics distortion was compared to the ones obtained from calculation using hard-edge model and measurement results. In order to investigate the effects of IDs on the beam dynamics, Frequency Map Analysis (FMA) was employed. The effects of the IDs and their compensation are presented herewith.
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR048  
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THPMR049 Minimization of Nonlinear Effects of Insertion Devices at SPS Storage Ring 3515
  • P. Sunwong, P. Klysubun, S. Kongtawong, S. Krainara, T. Pulampong, P. Sudmuang
    SLRI, Nakhon Ratchasima, Thailand
  • T. Pulampong
    JAI, Oxford, United Kingdom
  Funding: Synchrotron Light Research Institute PO. Box 93 Nakhon Ratchasima 30000 Thailand
Nonlinear effects of insertion devices were studied for the Siam Photon Source (SPS) storage ring. Despite the fact that shimming technique was used to minimize the nonlinear components of magnetic field integral arising from random errors, the nonlinear dynamics effects still remain. It was found that calculated dynamic field integrals are largest in the 2.2 T Hybrid Multipole Wiggler (MPW). Dynamics effects of insertion devices are attributed to the wiggling trajectory of electron in the region of magnetic field roll-off due to finite pole width. For better and more effective operation of the SPS storage ring, multipole components of the dynamic field integral in the MPW have to be further reduced.
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR049  
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