Dynamic field quality of LHC/Saclay arc quadrupole magnet prototype

As part of the magnet R&D program for the Large Hadron Collider (LHC), CEA Saclay has designed and built two 3-m-long, 56-mm-twin-aperture are quadrupole magnet prototypes. Extensive field quality measurements were performed during the cold-test of the second prototype. A review of the field qua...

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Bibliographic Details
Main Authors: Devred, A., Belorgey, J., Deregel, J., Gallet, B., Genevey, P., Kircher, F., Rifflet, J.M., Sellier, J.C., Vedrine, P., Billan, J., Ogitsu, T.
Format: Conference Proceeding
Language:English
Subjects:
Iron
Large Hadron Collider
Magnetic field measurement
Power cables
Prototypes
Saturation magnetization
Superconducting cables
Superconducting coils
Superconducting filaments and wires
Superconducting magnets
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Summary:As part of the magnet R&D program for the Large Hadron Collider (LHC), CEA Saclay has designed and built two 3-m-long, 56-mm-twin-aperture are quadrupole magnet prototypes. Extensive field quality measurements were performed during the cold-test of the second prototype. A review of the field quality data as a function of ramp rate is presented. The observed field distortions are explained in terms of inter-strand coupling currents arising from low and non-uniform resistances at the crossovers between the strands of the two-layer Rutherford-type cable. Last, the distribution of crossover resistances within the quadrupole magnet coil is determined.
DOI:10.1109/PAC.1997.753210