17–22 May 2026
C.I.D
Europe/Zurich timezone

Generation of Local Vertical Dispersion in a Long Straight Section of SAPS Storage Ring

TUP2613
19 May 2026, 16:00
2h
C.I.D

C.I.D

Deauville, France
Poster Presentation MC2.A05: Synchrotron Radiation Facilities Poster session

Speaker

Jianliang Chen (Chinese Academy of Sciences)

Description

A promising direction for fourth-generation light sources is the integration of a free-electron laser (FEL) oscillator to achieve higher spectral brightness. This approach imposes stringent requirements not only on the FEL oscillator parameters but also on the storage ring's performance. Preliminary studies at the Southern Advanced Photon Source (SAPS) indicate that the optimal gain for an oscillator occurs when the vertical dispersion in a long straight section is approximately 1 cm. To realize this condition, we introduce a local vertical dispersion scheme in the SAPS storage ring lattice. This is achieved by applying a bending angle to a longitudinal gradient dipole within a DBA-like cell, generating the desired vertical dispersion, which is subsequently corrected by a dipole in the subsequent cell. This paper details the generation of this local vertical dispersion and evaluates its impact on the overall ring performance.

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Author

Yu Zhao (Institute of High Energy Physics)

Co-authors

Jianliang Chen (Chinese Academy of Sciences) Weihang Liu (Institute of High Energy Physics) Dr Weilun Qin (Institute of High Energy Physics, Chinese Academy of Sciences)

Presentation materials

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