CERN Accelerating science

Article
Title	3D Simulation Studies of SNS Ring Doublet Magnets
Author(s)	Wang, Jian-Guang ; Tsoupas, Nicholaos ; Venturini, Marco
Affiliation	(BNL, Upton, Long Island, New York) ; (LBNL, Berkeley) ; (ORNL/SNS, Oak Ridge, Tennessee)
Publication	2005
In:	21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.3865
Subject category	Accelerators and Storage Rings
Abstract	The accumulator ring of the Spallation Neutron Source (SNS) at ORNL employs in its straight sections closely packed quadrupole doublet magnets with large aperture of R=15.1 cm and relatively short iron-to-iron distance of 51.4 cm.* The magnetic interference among the magnets in the doublet assemblies is not avoidable due to the fringe fields. Though each magnet in the assemblies has been individually mapped to high accuracy of delta(B)/B 1x10-4, the experimental data including the magnet interference effect in the assemblies will not be available. We have performed 3D computer simulations on a quadrupole doublet model in order to assess the degree of the interference and to obtain relevant data which should be very useful for the SNS commissioning and operation. This paper reports our simulation results.