| Paper |
Title |
Page |
| MOPAB074 |
Preliminary Study of Design Method for Hybrid MBA Lattice |
297 |
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- J.J. Tan, Z.H. Bai, Z.L. Ren, J.H. Xu
USTC/NSRL, Hefei, Anhui, People’s Republic of China
- Q. Zhang
INEST, Hefei, People’s Republic of China
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Nonlinear optimization of hybrid multi-bend-achromat (HMBA) lattice is a difficult task due to its quite limited variables of multipole magnets. As a result, it is necessary to consider nonlinear potential of the lattice in its linear design. Nonlinear dynamics can be estimated by nonlinear driving terms and detuning terms. In this paper, we propose a design method for HMBA lattice. In this method, objective functions include emittance and two indicators of nonlinear dynamics, which consist of nonlinear driving terms and detuning terms. As an example, an HMBA lattice for a 2.2 GeV storage ring with circumference of 460.8 m was designed to demonstrate the method.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB074
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| About • |
paper received ※ 19 May 2021 paper accepted ※ 21 May 2021 issue date ※ 21 August 2021 |
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| WEPAB263 |
Complex Unit Lattice Cell for Low-Emittance Synchrotrons |
3254 |
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- Z.L. Ren, Z.H. Bai, J.J. Tan, L. Wang, H. Xu, P.H. Yang
USTC/NSRL, Hefei, Anhui, People’s Republic of China
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To reach the real diffraction-limited emittance, it is generally required to increase the number of bends in multi-bend achromat (MBA) lattices that are used in the designs of fourth-generation synchrotron light sources. For an MBA lattice with distributed chromatic correction, more bends mean much tighter space and much stronger magnets. Inspired by the hybrid MBA lattice concept, in this paper we propose a new lattice concept called complex unit lattice cell, which can save space and reduce magnet strengths. A 17BA lattice based on the complex unit cell concept is designed for a 3 GeV synchrotron light source with a circumference of 537.6 m, which reaches a natural emittance of about 21 pm·rad. Comparison is also made between this 17BA lattice and the 17BA lattice with distributed chromatic correction to demonstrate the merit of the complex unit cell concept.
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Poster WEPAB263 [1.279 MB]
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB263
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| About • |
paper received ※ 16 May 2021 paper accepted ※ 02 July 2021 issue date ※ 12 August 2021 |
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| THPAB073 |
Study of Seven-Bend-Achromat Lattice Option for Half |
3926 |
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- J.H. Xu, Z.H. Bai, Z.L. Ren, J.J. Tan, P.H. Yang
USTC/NSRL, Hefei, Anhui, People’s Republic of China
- Q. Zhang
INEST, Hefei, People’s Republic of China
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A seven-bend-achromat (7BA) storage ring lattice design for Hefei Advanced Light Facility (HALF) with a beam energy of 2.2 GeV and a circumference of 388.8 m is presented. The 7BA lattice is designed with the combined function bends and reverse bends which has a natural emittance of about 67 pm·rad. Two lattice candidates with different tunes have been selected. One lattice has better nonlinear dynamic performance for off-axis injection. The other lattice provides lower beta functions at the center of straight sections. The results of these studies are discussed in this paper.
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Poster THPAB073 [1.146 MB]
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB073
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| About • |
paper received ※ 15 May 2021 paper accepted ※ 28 July 2021 issue date ※ 16 August 2021 |
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| Export • |
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