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Paper   IPM / Particles / 13718
School of Particles and Accelerator
  Title:   Magnetic Characterization of Fast-Pulsed Quadrupole Magnets for Linac4
  Author(s): 
1.  Samira Kasaei
2.  M Buzio
3.  O Crettiez
4.  V Della Selva
5.  L Fiscarelli
6.  J Garcia Perez
7.  J Lallement
  Status:   In Proceedings
  Proceeding: proceedings of Linac 14, Geneva, Switzerland
  Year:  2014
  Supported by:  IPM
  Abstract:
Linac4, currently being built at CERN, includes 24 quadrupole magnets characterized by narrow apertures and fast excitation cycles which make accurate magnetic measurements challenging. This paper describes the method used for the measurement, which is a combination of techniques based on stretched wire, rotating and fixed search coils. We show how these different instruments can be used in a complementary way to derive information on different aspects of the magnetic behaviour, such as the impact of hysteresis and dynamic eddy current effects. We summarize the results of the series measurement campaign, which include field strength, harmonic components, and the offset and orientation of the magnetic axis. Finally, we discuss the relevance of these measurements as their impact to the operation of the linac.

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