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Title: Decreasing the emittance using a multi-period Robinson wigglers in TPS

Abstract

The Taiwan Photon Source (TPS) has been successfully commissioned. However, the minimum emittance in the TPS lattice is 1.6 nm rad. In the existing TPS storage ring lattice, it is imperative to reduce the emittance to below 1 nm rad. Therefore, a feasibility study for reducing the effective emittance of the TPS storage ring by using a Robinson wiggler was launched; the reduction is necessary to enhance the photon brilliance. In this study, a permanent-magnet multiperiod Robinson wiggler (MRW) was developed for use instead of the single-period Robinson wiggler. In general, the quadruple field of a combined function magnet in the storage ring is approximately few tesla per meter. According to beam dynamic analysis, we found that it is necessary to adopt a high gradient (40 T/m) combined-function MRW magnet to reduce the emittance effectively. Therefore, a high gradient field strength is required in the combined function MRW magnet. In this study, the quadrupole field strength of the MRW magnet was allowed to be approximately 40 T/m at a magnet gap of 20 mm. The period length of the MRW magnet was 300 mm and the period number was 16. The of MRWs is discussed in regard to the possibilitymore » of increasing the photon brilliance from IU22.« less

Authors:
 [1];  [2];  [3];  [4]
  1. Department of Physics, National Tsing Hua University Hsinchu 30043, Taiwan (China)
  2. NSRRC, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan (China)
  3. (China)
  4. Department of Physics, Indiana University (United States)
Publication Date:
OSTI Identifier:
22608301
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1741; Journal Issue: 1; Conference: SRI2015: 12. international conference on synchrotron radiation instrumentation, New York, NY (United States), 6-10 Jul 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; APPROXIMATIONS; BEAMS; FEASIBILITY STUDIES; PERMANENT MAGNETS; PHOTONS; REDUCTION; STORAGE RINGS; WIGGLER MAGNETS

Citation Formats

Huamg, C. W., E-mail: huang.zw@nsrrc.org.tw, Hwang, C. S., E-mail: cshwang@nsrrc.org.tw, Department of Electrophysics, National Chiao Tung University, Hsinchu 300, Taiwan, and Lee, S. Y., E-mail: shylee@indiana.edu. Decreasing the emittance using a multi-period Robinson wigglers in TPS. United States: N. p., 2016. Web. doi:10.1063/1.4952784.
Huamg, C. W., E-mail: huang.zw@nsrrc.org.tw, Hwang, C. S., E-mail: cshwang@nsrrc.org.tw, Department of Electrophysics, National Chiao Tung University, Hsinchu 300, Taiwan, & Lee, S. Y., E-mail: shylee@indiana.edu. Decreasing the emittance using a multi-period Robinson wigglers in TPS. United States. doi:10.1063/1.4952784.
Huamg, C. W., E-mail: huang.zw@nsrrc.org.tw, Hwang, C. S., E-mail: cshwang@nsrrc.org.tw, Department of Electrophysics, National Chiao Tung University, Hsinchu 300, Taiwan, and Lee, S. Y., E-mail: shylee@indiana.edu. Wed . "Decreasing the emittance using a multi-period Robinson wigglers in TPS". United States. doi:10.1063/1.4952784.
@article{osti_22608301,
title = {Decreasing the emittance using a multi-period Robinson wigglers in TPS},
author = {Huamg, C. W., E-mail: huang.zw@nsrrc.org.tw and Hwang, C. S., E-mail: cshwang@nsrrc.org.tw and Department of Electrophysics, National Chiao Tung University, Hsinchu 300, Taiwan and Lee, S. Y., E-mail: shylee@indiana.edu},
abstractNote = {The Taiwan Photon Source (TPS) has been successfully commissioned. However, the minimum emittance in the TPS lattice is 1.6 nm rad. In the existing TPS storage ring lattice, it is imperative to reduce the emittance to below 1 nm rad. Therefore, a feasibility study for reducing the effective emittance of the TPS storage ring by using a Robinson wiggler was launched; the reduction is necessary to enhance the photon brilliance. In this study, a permanent-magnet multiperiod Robinson wiggler (MRW) was developed for use instead of the single-period Robinson wiggler. In general, the quadruple field of a combined function magnet in the storage ring is approximately few tesla per meter. According to beam dynamic analysis, we found that it is necessary to adopt a high gradient (40 T/m) combined-function MRW magnet to reduce the emittance effectively. Therefore, a high gradient field strength is required in the combined function MRW magnet. In this study, the quadrupole field strength of the MRW magnet was allowed to be approximately 40 T/m at a magnet gap of 20 mm. The period length of the MRW magnet was 300 mm and the period number was 16. The of MRWs is discussed in regard to the possibility of increasing the photon brilliance from IU22.},
doi = {10.1063/1.4952784},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1741,
place = {United States},
year = {Wed Jul 27 00:00:00 EDT 2016},
month = {Wed Jul 27 00:00:00 EDT 2016}
}