eeFACT2022 - List of Authors (Chen, F.S.)

Paper	Title	Page
WEZAT0204	Status of Interaction Region Magnets for CEPC	195
	C. Shen, F.S. Chen, R. Liang, X.C. Yang, Y.S. Zhu IHEP, Beijing, People’s Republic of China Y. Wan, X.L. Wu, W. Zou HFCIM, HeFei, People’s Republic of China
	Funding: This work was supported by National Natural Science Foundation of China under contract 11875272. High gradient quadrupole magnets are required on both sides of the interaction points in the proposed Circular Electron Positron Collider (CEPC). There are three double aperture superconducting quadrupoles with a crossing angle between two aperture centerlines of 33 mrad. It is challenging to meet stringent design requirements, including limited space, magnetic field crosstalk between two apertures, magnetic field gradients up to 142 T/m, etc. In this paper, status of superconducting magnets in CEPC interaction region in the technical design stage is described. Magnetic design of superconducting quadrupole magnet with three kinds of quadrupole coil structures, including cos(2theta) coil, CCT coil, and Serpentine coil is presented and compared. In addition, the development status of a single aperture short model quadrupole magnet with a magnetic length of 0.5 m is presented.
	Slides WEZAT0204 [5.126 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-eeFACT2022-WEZAT0204
About •	Received ※ 02 December 2022 — Revised ※ 07 February 2023 — Accepted ※ 08 February 2023 — Issue date ※ 18 February 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEZAT0206	The Fabrication and Measurements of the Dual Aperture Quadrupole for CEPC
	M. Yang, F.S. Chen, Na,B. Na, Y.F. Wu, Z. Zhang, Z. Zhang, Y.S. Zhu IHEP, Beijing, People’s Republic of China
	Since the circumference of Circular Electron Positron Collider (CEPC) is very large and has a double ring lattice, the CEPC collider will use the dual aperture dipole and quadrupole magnets to save about 50% power. The dual aperture quadrupole magnets have opposite polarities in the two apertures. A 1 m long dual aperture quadrupole prototype is designed, fabricated and measured. The preliminary magnetic measurement results showed a large crosstalk effect in the two apertures, thus the magnetic center in X axis has a large shift. Then a modification of the iron is done to compensated the field crosstalk effect. The magnetic center shift decreased an order. The detailed process is illustrated in this paper.
	Slides WEZAT0206 [8.126 MB]
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Status of Interaction Region Magnets for CEPC

195

C. Shen, F.S. Chen, R. Liang, X.C. Yang, Y.S. Zhu
IHEP, Beijing, People’s Republic of China
Y. Wan, X.L. Wu, W. Zou
HFCIM, HeFei, People’s Republic of China

Funding: This work was supported by National Natural Science Foundation of China under contract 11875272.
High gradient quadrupole magnets are required on both sides of the interaction points in the proposed Circular Electron Positron Collider (CEPC). There are three double aperture superconducting quadrupoles with a crossing angle between two aperture centerlines of 33 mrad. It is challenging to meet stringent design requirements, including limited space, magnetic field crosstalk between two apertures, magnetic field gradients up to 142 T/m, etc. In this paper, status of superconducting magnets in CEPC interaction region in the technical design stage is described. Magnetic design of superconducting quadrupole magnet with three kinds of quadrupole coil structures, including cos(2theta) coil, CCT coil, and Serpentine coil is presented and compared. In addition, the development status of a single aperture short model quadrupole magnet with a magnetic length of 0.5 m is presented.

Slides WEZAT0204 [5.126 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-eeFACT2022-WEZAT0204

About •

Received ※ 02 December 2022 — Revised ※ 07 February 2023 — Accepted ※ 08 February 2023 — Issue date ※ 18 February 2023

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEZAT0206

The Fabrication and Measurements of the Dual Aperture Quadrupole for CEPC

M. Yang, F.S. Chen, Na,B. Na, Y.F. Wu, Z. Zhang, Z. Zhang, Y.S. Zhu
IHEP, Beijing, People’s Republic of China

Since the circumference of Circular Electron Positron Collider (CEPC) is very large and has a double ring lattice, the CEPC collider will use the dual aperture dipole and quadrupole magnets to save about 50% power. The dual aperture quadrupole magnets have opposite polarities in the two apertures. A 1 m long dual aperture quadrupole prototype is designed, fabricated and measured. The preliminary magnetic measurement results showed a large crosstalk effect in the two apertures, thus the magnetic center in X axis has a large shift. Then a modification of the iron is done to compensated the field crosstalk effect. The magnetic center shift decreased an order. The detailed process is illustrated in this paper.

Slides WEZAT0206 [8.126 MB]

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)