Abstract
The muon g-2 experiment at Brookhaven National Laboratory has the goal of determining the muon anomalous g-value aμ (= (g-2)/2) to the very high precision of 0.35 parts per million and thus requires a storage ring magnet with great stability and homogeniety. A superferric storage ring with a radius of 7.11 m and a magnetic field of 1.45 T has been constructed in which the field quality is largely determined by the iron, and the excitation is provided by superconducting coils operating at a current of 5200 A. The storage ring has been constructed with maximum attention to azimuthal symmetry and to tight mechanical tolerances and with many features to allow obtaining a homogenous magnetic field. The fabrication of the storage ring, its cryogenics and quench protection systems, and its initial testing and operation are described.
Original language | English (US) |
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Pages (from-to) | 151-174 |
Number of pages | 24 |
Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
Volume | 457 |
Issue number | 1-2 |
DOIs | |
State | Published - Jan 11 2001 |
Bibliographical note
Funding Information:The construction of this magnet was supported by the US Department of Energy and by the US–Japan Program for Cooperation in High Energy Physics.