Novel Adjustable Permanent Magnet Quadrupoles for the CLIC Drive Beam Decelerator

Author

Shepherd, B.J.A. ; Clarke, J.A. ; Marks, N. ; Collomb, N.A. ; Richmond, J.A.

Author_Institution

Sci. & Technol. Facilities Council, Daresbury Lab., Warrington, UK

Volume

22

Issue

3

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

4004204

Lastpage

4004204

Abstract

The CLIC Drive Beam Decelerator (DBD) requires 41,848 quadrupoles to keep the beam focused along its length. Due to the stringent heat load requirements of the CLIC tunnel, a permanent magnet (PM) design is under investigation in a collaboration between CERN and STFC Daresbury Laboratory. The design incorporates a novel method of adjustment based on moving PMs. To cover the full length of the decelerator, two families of quadrupoles have been designed. This paper outlines the challenges of building an adjustable PM quadrupole, and explains the features of the two designs and how they will meet the demanding specifications of the CLIC DBD.

Keywords

accelerator magnets; magnetostatics; permanent magnets; CLIC; adjustable permanent magnet quadrupoles; beam focus; drive beam decelerator; heat load; Force; Laboratories; Magnetic circuits; Magnetic flux; Permanent magnets; Prototypes; Solid modeling; Accelerator magnets; magnetostatics; permanent magnets;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2012.2191632

Filename

6172558