A model for correlating 4. 2-K performance with room-temperature mechanical characteristics in superconducting test dipole magnets for the Superconducting Super Collider (SSC)

Journal Article · Sun Mar 15 00:00:00 EST 1992 · Journal of Applied Physics; (United States)

DOI:https://doi.org/10.1063/1.351001· OSTI ID:7205718

Ige, O O; Lyon, R H; Iwasa, Y ^[1]

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1. Francis Bitter National Magnet Laboratory Plasma Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

The longitudinal attenuation of impact-generated pulses in ten superconducting dipole magnets was measured at room temperature. A lumped-parameter model was constructed for the collared dipole. Using the method of nonlinear least-squares, the model was used to estimate the internal damping in the main components of the dipoles and the coupling resistances between the components: collars, inner, and outer coils. A positive correlation was found between the collar-inner coil coupling resistance and the 4.2-K performance of the magnets: the higher the coupling resistance, the fewer the number of quenches required to reach design operating current. There was virtually no correlation between any of the other internal or coupling resistances and 4.2-K performance. These observations are explained in terms of frictional slip of the inner coil against the collars causing premature quenches. The magnets are more susceptible to quenches at the collar-inner coil interface than at the collar-outer coil interface because the inner coil is subject to higher fields and forces. The experiment is potentially useful as a technique for screening high-performance superconducting magnets such as Superconducting Super Collider (SSC) dipoles at room temperature.

• OSTI ID: 7205718
• Journal Information: Journal of Applied Physics; (United States), Vol. 71:6; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
43 PARTICLE ACCELERATORS
SUPERCONDUCTING MAGNETS
MECHANICAL PROPERTIES
SUPERCONDUCTING SUPER COLLIDER
AMBIENT TEMPERATURE
DIPOLES
MATHEMATICAL MODELS
PERFORMANCE
TEMPERATURE RANGE 0000-0013 K
TESTING
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
MAGNETS
MULTIPOLES
STORAGE RINGS
SUPERCONDUCTING DEVICES
TEMPERATURE RANGE
665412* - Superconducting Devices- (1992-)
430303 - Particle Accelerators- Experimental Facilities & Equipment