JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - UNPB AU - Yang, M. AU - Chen, F.S. AU - Na, Na,B. AU - Wu, Y.F. AU - Zhang, Z. AU - Zhu, Y.S. ED - Biagini, Maria Enrica ED - Chrin, Jan ED - Giabbai, Manuela ED - Iungo, Massimiliano ED - Schaa, Volker R.W. TI - The Fabrication and Measurements of the Dual Aperture Quadrupole for CEPC J2 - Proc. of eeFACT2022, Frascati, Italy, 12-16 September 2022 CY - Frascati, Italy T2 - ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e- Colliders T3 - 65 LA - english AB - 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. PB - JACoW Publishing CP - Geneva, Switzerland ER -