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Title |
Page |
| THC2MA02 |
Experiences with the Manufacturing, Testing and Quality Control of Large Number of Superconducting Magnets
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567 |
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- A. Puntambekar, M. Bagre, V. Jain, M. G. Karmarkar, P. Khare, S. Kotaiah
RRCAT, Indore (M. P.)
- G. Mugnai, R. Wolf
CERN, Geneva
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Raja Ramanna Centre for Advanced Technology has successfully completed the supply of nearly 2000 nos. Superconducting Corrector (SC) Magnets for the LHC project at CERN. Initial prototypes were developed at RRCAT in collaboration with CERN and large scale production was done in industry. These corrector magnets require precision components, accurate assembly procedure, elaborate testing and stringent quality control required for repeatable performance. A number of sub technologies were developed for these magnets at RRCAT and successfully transferred to Industry. These include precision coil winding, joining SC wire to get low contact resistance, measuring it at 4.2 K. Ultrasonic welding machine and automatic coil winding machines were developed. Cryogenic testing procedures and test facility were established at RRCAT. SC switches and current leads were designed and fabricated. Cryogenic testing at 4.2 K and magnetic measurement at 300 K for all the 2000 magnets were done at RRCAT. Special tooling and inspection gauges for in process inspection were made. In this paper we describe the experience gained during technology development, prototyping and technology transfer to industry.
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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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