Title :
Permanent magnet quadrupoles for CESR phase-III upgrade
Author :
Lou, W. ; Hartill, D. ; Rice, D. ; Rubin, D. ; Welch, J.
Author_Institution :
Lab. of Nucl. Studies, Cornell Univ., Ithaca, NY, USA
Abstract :
The CESR Phase-III upgrade plan includes very strong permanent magnet quadrupoles in front of the cryostat for the superconducting quadrupoles and physically as close as possible to the interaction point. Together with the superconducting quadrupoles, they provide tighter vertical focusing at the interaction point. The quadrupoles are built with Neodymium Iron Boron (NdFeB) material and operate inside the 15 kG solenoid field. Requirements on the field quality and stability of these quadrupoles are discussed and test results are presented
Keywords :
accelerator magnets; boron alloys; colliding beam accelerators; electron accelerators; iron alloys; neodymium alloys; permanent magnets; storage rings; 15 kG; CESR phase-III upgrade; NdFeB; cryostat; field quality; field stability; interaction point; permanent magnet quadrupoles; solenoid field; superconducting quadrupoles; vertical focusing; Boron; Iron; Magnetic materials; Neodymium; Permanent magnets; Solenoids; Stability; Superconducting magnets; Superconducting materials; Testing;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.753166
