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| THPMA014 |
Mechanical Stability of Open-type Quadrupole Magnets for a 2.5 GeV SRS (Indus-2)
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646 |
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- S. Konjeti, S. Das, M. G. Karmarkar, P. K. Kulshreshtha, K. Ruwali, K. Swarna
RRCAT, Indore (M. P.)
- M. K. Ghosh
BHU, Varanasi
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The open type Quadrupole magnets (Max. gradient: 16 T/m) for 2.5 GeV Indus-2 are made in C-configuration in which both of outer vertical sections of the steel are removed to take out the emerging synchrotron beam lines, in the region immediately adjacent to main dipole magnets of the ring. This induces engineering complexity relating to mechanical stability that critically controls the deviations in magnetic centre and field quality. To meet the stringent field quality requirements, the mechanical structure, which is precisely holding the magnet poles, is designed for minimum deflection at maximum gradient. The magnet is simulated with coupled field Emag-structural analysis, using ANSYS. The measurement of magnetic centre shift in prototype magnet assemblies with maximum excitation current is within 15 microns. The magnetic measurement results show that the higher order multipoles are low and not changing with excitation current. The optimized open-type Quadrupole magnet design is implemented in series production of all 32 magnets. The mechanical assembly accuracies and stability of series magnets with excitation are discussed in this paper.
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