“School of Particles And Accelerator”

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Paper   IPM / Particles And Accelerator / 15640
School of Particles and Accelerator
  Title:   Magnetic measurements of fast-pulsed electromagnetic quadrupoles for Linac4
  Author(s): 
1.  M Buzio
2.  L Fiscarelli
3.  V Della Selva
4.  Samira Kasaei
5.  J Garcia Perez
  Status:   Published
  Journal: Internal Note 2014-19
  Year:  2014
  Supported by:  IPM
  Abstract:
The Linac4 accelerator includes 24 electromagnetic quadrupoles characterized by very fast excitation cycles and narrow apertures which make accurate magnetic measurements challenging. This note describes first the method used for the testing, that is a combination of techniques based on stretched wire system plus 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 of these quadrupoles, such as the impact of hysteresis cycling and of dynamic eddy current effects. We then summarize the results of the series test campaign, which include field strength, quality, and the offset and orientation of the magnetic axis.

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