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

A new mechanical design concept for the Nb3Sn quadrupoles has been developed with a goal of an accelerator quality magnet that can be industrially produced in large series. This concept can easily be extended to any length and applied on both 1-in-1 and 2-in-1 configurations. It is based on the poleloading concept and collared coils using dipole-type collars. Detailed design optimisation of a demonstrator magnet based on present base-line HL-LHC IR quadrupole QXF coil geometry has been carried out including the end regions. This report describes the design concept and the fully parametric multi-physics finite element (FE) models that were used to determine the optimal assembly parameters including the effects of the manufacturing tolerances.

“…The multi-physics model combines advanced CAD tools with Finite Element Analysis (FEA) software, in the integrated design environment of ANSYS ® Workbench (Fig. 13) [6].…”

Section: Finite Element Modelmentioning

confidence: 99%

High Gradient Nb₃Sn Quadrupole Demonstrator MKQXF Engineering Design

Kokkinos¹,

Karppinen²

2018

“…1). The test of this second set was done in June 2011 in the new vertical test station at CERN and the magnet went up to >95% of the short sample current at 4.2 K, corresponding to a field on the coil of 12.5 T. A detailed report of this magnet can be found in [14], [15]. More SMCs will be built to certify the coil building technology with the final cable and insulation scheme for the High Field Model.…”

Section: Preparation For the Magnet Construction Of The High Fielmentioning

confidence: 99%

The EuCARD High Field Magnet Project

Rijk

2012

In the EC FP7 program EuCARD (European Coordination for Accelerator Research & Development) the subject of work-package 7 is High Field Magnets. The aim of the HFM work-package is to develop technologies for magnets in the range 13 T -20 T for accelerator applications like HL-LHC and HE-LHC. The work-package foresees construction of a 13 T dipole with an aperture of 100 mm, an HTS dipole insert with B = 6 T, an HTS current link and a helical undulator. The work-package has 12 European partners and the funding is shared between the EC and the partners.This contribution describes the aims of the work-package, the status of the work and the structure of the collaboration. CERN-ATS-2012-025February 2012 Abstract

“…In order to pre-load the coils at room temperature, steel keys and shims are inserted inside the gaps opened by the bladders, inflated by a dedicated hydraulic pump unit. The detailed design with a mechanical analysis is described in [9].…”

Section: A Mechanical Structure Componentsmentioning

confidence: 99%

“…Four lateral bladders are slid with the slip-shims in the cavity between the yoke and the coil pad. By monitoring the shell strains, the bladders are gradually pressurized up to 142 bar, with successive pump and purge operations, forcing the yoke against the shell 2 Trademark of HBM 3 Trademark of DuPont inner diameter surface until reaching the target shell strain of ± 500 μm/m [9]. The gain on the pre-load of the coils is obtained by increasing the size of the interference keys.…”

Section: F Magnet Assemblymentioning

confidence: 99%

The Short Model Coil (SMC) Dipole: An R&D Program Towards ${\rm Nb}_{3}{\rm Sn}$ Accelerator Magnets

Bajko

Bordini

Canfer

et al. 2012

Self Cite

The Short Model Coil (SMC) assembly has been designed, as test bench for short racetrack coils wound with Nb 3 Sn cable. The mechanical structure comprises an iron yoke surrounded by a 20 mm thick aluminium alloy shell, and includes four loading pads that transmit the required pre-compression from the outer shell into the two coils. The outer shell is pre-tensioned with mechanical keys that are inserted with the help of pressurized bladders and two 30 mm diameter aluminium alloy rods provide the axial loading to the coil ends. The outer shell, the axial rods, and the coils are instrumented with strain gauges, which allow precise monitoring of the loading conditions during the assembly and at cryogenic temperature during the magnet test. Two SMC assemblies have been completed and cold tested in the frame of a European collaboration between CEA (FR), CERN and STFC (UK) and with the technical support from LBNL (US). This paper describes the main features of the SMC assembly, the experience from the dummy assemblies, the fabrication of the coils, and discusses the test results of the cold tests showing a peak field of 12.5 T at 1.9 K after training.