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Magnet design for a low-emittance storage ring.

In English

Författare

  • Martin Johansson
  • Bengt Anderberg
  • Lars-Johan Lindgren

Summary, in English

The MAX IV 3 GeV storage ring, currently under construction, pursues the goal of low electron beam emittance by using a multi-bend achromat magnet lattice, which is realised by having several consecutive magnet elements precision-machined out of a common solid iron block, 2.3-3.4 m long. With this magnet design solution, instead of having 1320 individual magnets, the MAX IV 3 GeV storage ring is built up using 140 integrated `magnet block' units, containing all these magnet elements. Major features of this magnet block design are compactness, vibration stability and that the alignment of magnet elements within each unit is given by the mechanical accuracy of the CNC machining rather than individual field measurement and adjustment. This article presents practical engineering details of implementing this magnet design solution, and mechanical + magnetic field measurement results from the magnet production series. At the time of writing (spring 2014), the production series, which is totally outsourced to industry, is roughly half way through, with mechanical/magnetic QA conforming to specifications. It is the conclusion of the authors that the MAX IV magnet block concept, which has sometimes been described as new or innovative, is from a manufacturing point of view simply a collection of known mature production methods and measurement procedures, which can be executed at fixed cost with a low level of risk.

Publiceringsår

2014

Språk

Engelska

Sidor

884-903

Publikation/Tidskrift/Serie

Journal of Synchrotron Radiation

Volym

21

Issue

Pt 5

Dokumenttyp

Artikel i tidskrift

Förlag

International Union of Crystallography

Ämne

  • Accelerator Physics and Instrumentation

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1600-5775