Title :
Magnetic measurements of the storage ring quadrupole magnets for the 7-GeV Advanced Photon Source
Author :
Kim, S.H. ; Kim, K. ; Doose, C. ; Hogrefe, R. ; Merl, R.
Author_Institution :
Argonne Nat. Lab., IL, USA
Abstract :
The pre-production quadrupole magnet for the Advanced Photon Source (APS) storage ring has been tested. The multipole coefficients meet the tolerance requirements. The field-gradient integrals are measured relative to a reference quadrupole. By using two laser beam units, the magnetic and geometrical axes of the magnet are aligned within 0.2 mrad. The dependencies of the sextupole coefficient and the magnetic center on the excitation current are corrected by shunting the magnetic potentials of the top and bottom yokes
Keywords :
beam handling equipment; electromagnets; electron accelerators; storage rings; 7 GeV; APS; Advanced Photon Source; bottom yoke; excitation current; field-gradient integrals; geometrical axes; laser beam units; magnetic center; magnetic measurements; magnetic potentials shunting; multipole coefficients; preproduction quadrupole magnet; reference quadrupole; sextupole coefficient; storage ring quadrupole magnets; tolerance requirements; top yoke; Coils; Energy measurement; Lamination; Laser beams; Magnetic field measurement; Magnetic variables measurement; Magnets; Probes; Storage rings; Testing;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.309467
