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Magnetic Qualification of Permanent Magnet Quadrupoles for CERN's Linac4

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4 Author(s)
Buzio, M. ; CERN, Geneva, Switzerland ; Golluccio, G. ; Lombardi, A. ; Mateo, F.

This paper summarizes the results of the magnetic measurements done to qualify prototypes and series permanent-magnet quadrupoles for the new Linac4, currently in construction at CERN. The results, obtained with a combination of stretched wire and rotating coil techniques, include the individually tuned integrated field gradient, multipoles, magnetic axis and field direction. These magnets are characterized by a challengingly small 22 mm aperture diameter and we illustrate the methods adopted to guarantee instrument calibration, along with the estimated accuracies of the measured quantities and their impact on beam optics.

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:22 ,  Issue: 3 )