Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Concurrent operation of round beam and flat beam in a low-emittance storage ring

  • J. Lee (Pohang Accelerator Laboratory) ;
  • S. Ahn (Pohang Accelerator Laboratory) ;
  • J. Ko (Department of Accelerator Science, Korea University) ;
  • B. Oh (Department of Accelerator Science, Korea University) ;
  • G. Jang (Pohang Accelerator Laboratory) ;
  • Y.D. Yoon (Pohang Accelerator Laboratory) ;
  • S. Shin (Department of Accelerator Science, Korea University) ;
  • J.-H.Kim (Ulsan National Institute of Science and Technology) ;
  • M. Chung (Ulsan National Institute of Science and Technology)
  • Received : 2022.10.07
  • Accepted : 2023.07.02
  • Published : 2023.10.25
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Abstract

In 4th-generation storage rings, whether to operate the beam as round or flat is a critical question. A round beam has equal horizontal and vertical emittances, and is an efficient solution to reduce strong intra-beam scattering effects and lengthen the Touschek lifetimes, but a flat beam produces a brighter photon beam than a round beam. To provide both beams concurrently rather than bifurcating the beam time, this paper presents the exploitation of beam dynamics and the cutting-edge fast pulser that supports concurrent operation of round beam and flat beam.

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Acknowledgement

We would like to thank Michael Borland for providing helpful information and many useful discussions through elegant forum. This research was supported in part by the Korean Government MSIT (Multipurpose Synchrotron Radiation Construction Project) and also by Basic Science Research Program through the National Research Foundation of Korea (NRF-2019R1A2C1004862).

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