Mechanical Design of the SMC (Short Model Coil) Dipole Magnet

Abstract

Abstract-The Short Model Coil (SMC) working group was set in February 2007 within the Next European Dipole (NED) program, in order to develop a short-scale model of a Nb 3 Sn dipole magnet. The SMC group comprises four laboratories: CERN/TE-MSC group (CH), CEA/IRFU (FR), RAL (UK) and LBNL (US). The SMC magnet was originally conceived to reach a peak field of about 13 T on conductor, using a 2500 A/mm 2 Powder-In-Tube (PIT) strand. The aim of this magnet device is to study the degradation of the magnetic properties of the Nb 3 Sn cable, by applying different level of pre-stress. To fully satisfy this purpose, a versatile and easy-to-assemble structure has to be realized. The design of the SMC magnet has been developed from an existing dipole magnet, the SD01, designed, built and tested at LBNL with support from CEA. In this paper we will describe the mechanical optimization of the dipole, starting from a conceptual configuration based on a former magnetic analysis. Two and three-dimensional Finite Element Method (FEM) models have been implemented in ANSYS and in CAST3M, aiming at setting the mechanical parameters of the dipole magnet structure, thus fulfilling the design constraints imposed by the materials.Index Terms-High field magnets, mechanical modeling, superconducting magnet design.

Magnetic Design and Code Benchmarking of the SMC (Short Model Coil) Dipole Magnet

“…Before magnetization, the coil pack is inserted inside a mechanical support structure composed of a yoke, four pads and a cylindrical outer shell. The description of the SMC structure and the reasons behind this mechanical design have been reported in [9].…”

The SMC (Short Model Coil) ${\rm Nb}_{3}{\rm Sn}$ Program: FE Analysis With 3D Modeling

“…Modifications or improvements of the contact status will be done after a detailed analysis of the last assembly test. The isotropic material properties for the magnet components are described in [4]. SMC3 had very low axial pre-stress compared to SMC1 and different cable insulation thickness.…”

Fiber Bragg Grating sensors based monitoring system for superconducting accelerator magnets

“…A dedicated magnet, the Short Model Coil (SMC), was designed, manufactured and tested at CERN with the aim to study the applications of Nb 3 Sn cable [1]. Since the superconductor is strain sensitive, precise monitoring of the mechanical performance of the magnet from fabrication to operation gives a critical feedback on possible coil motions which may lead to further damages.…”