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Tunable high-gradient permanent magnet quadrupoles

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Published 12 November 2014 • © CERN 2014
, , Citation B.J.A. Shepherd et al 2014 JINST 9 T11006 DOI 10.1088/1748-0221/9/11/T11006

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Author affiliations

1 Accelerator Science and Technology Centre, STFC Daresbury Laboratory, Sci-Tech Daresbury, Warrington WA4 4AD, U.K.

2 Technology Department, Daresbury Laboratory, Sci-Tech Daresbury, Warrington WA4 4AD, U.K.

3 Technology Department, Magnets, Superconductors and Cryostats Group, CERN, 1211 Geneva 23, Switzerland

Dates

  1. Received 23 June 2014
  2. Accepted 27 September 2014
  3. Published

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1748-0221/9/11/T11006

Abstract

A novel type of highly tunable permanent magnet (PM) based quadrupole has been designed by the ZEPTO collaboration. A prototype of the design (ZEPTO-Q1), intended to match the specification for the CLIC Drive Beam Decelerator, was built and magnetically measured at Daresbury Laboratory and CERN. The prototype utilises two pairs of PMs which move in opposite directions along a single vertical axis to produce a quadrupole gradient variable between 15 and 60 T/m. The prototype meets CLIC's challenging specification in terms of the strength and tunability of the magnet.

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10.1088/1748-0221/9/11/T11006