Conveners
Thu-Mo-Or33: Multiphysics Design and Analysis for Different Magnet Applications
- Gerard Willering (CERN)
- Naoyuki Amemiya (Kyoto University)
Modelling the behavior of a superconducting magnet is challenging due to interdependent, nonlinear, multi-domain and multi-scale phenomena occurring during fast transients. A modelling technique based on a lumped-element equivalent system was recently proposed, which efficiently simulates electro-magnetic and thermal transients in a magnet. The model, named LEDET (Lumped-Element Dynamic...
Laser-based accelerators are gaining interest in recent years as an alternative to conventional machines. Nowadays, energy and angular spread of the laser-driven beams are the main issues in application and different solutions for dedicated beam-transport lines have been proposed. In this context a system of permanent magnet quadrupoles (PMQs) has been realized by INFN researchers, in...
The Finite Element Method (FEM) is used to perform accurate modelling of superconducting magnets for magnetic field design, mechanical design, and calculations of the peak temperature and voltages to ground in the magnet during a quench.
Each design step solves a set of partial differential equations with appropriate boundary conditions, nonlinear material properties, and problem-adapted...
High temperature superconductors (HTS) have opened up a new experimental space. Commercially available HTS wires and tapes have now been developed with very high critical current densities at high fields. Large bore, high field “outsert” solenoid magnets that use more conventional NbTi and NbSn conductors have been developed to provide background fields in a cold bore of between 150 and 250 mm...
Addressing an NHMFL goal of developing high temperature superconductor (HTS) technology applied toward nuclear magnetic resonance (NMR) at high fields (~1 GHz), the work presented here focuses on the finite element analysis (FEA) led designs of Bi2Sr2CaCu2O8-x (Bi-2212) round wire prototype coils. With the goal of an HTS insert coil that produces a significant portion (>20 %) of a combined...
We present results of calculations of the ultimate forces for the worst-case scenario, an important safety concern in hybrid magnets. They appear during a simultaneous and immediate burnout of some or all upper or lower resistive coil halves, or shorts between the coils in the mid-plain. Because of their intensity, they have a dramatic impact on the mechanical layout of a hybrid magnet. An...
The transient behavior of a superconducting magnet is influenced by numerous simultaneous nonlinear effects occurring at different spatial and time scales in the electro-magnetic, thermal, and mechanical domains. Recent efforts towards precise and time-efficient modeling follow two distinct approaches. On the one hand, complex and interdependent phenomena are simulated by means of...
