Numerical Field Calculation in Support of the Hardware Commissioning of the LHC

IEEE Transactions on Applied Superconductivity (Impact Factor: 1.32). 11/2011; DOI: 10.1109/TASC.2011.2157344
Source: IEEE Xplore

ABSTRACT The hardware commissioning of the Large Hadron Collider required the testing and the qualification of the cryogenic and vacuum system, as well as the electrical systems for the powering of more than 10 000 superconducting magnets. Non-conformities had to be resolved within a tight schedule. In this paper, we focus on the role that electromagnetic-field computation has played during hardware commissioning in terms of the analysis of a magnet quench and electromagnetic-force calculations in busbars and splices, as well as field-quality prediction for the optimization of powering cycles.

  • [Show abstract] [Hide abstract]
    ABSTRACT: The paper discusses stability and protection, two key issues for design and operation of superconducting magnets, both LTS and HTS. A rather optimistic view on stability is presented first, followed by discussion of protection issue, focusing on its sub-issues-overheating and internal voltage-for three types of magnets: 1) LTS cryostable magnet; 2) LTS adiabatic magnet; and 3) HTS adiabatic magnet.
    IEEE Transactions on Applied Superconductivity 07/2005; · 1.32 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: The simulation of thermal processes in a superconducting coil during resistive transition is an intricate problem. A detailed thermo-hydraulic modeling comes at a high computational cost and suffers from the large number of empirical parameters. We present a macroscopical approach, covering the most relevant features while providing enough flexibility to gauge the material parameters with measurements. By combining the thermal model with numerical field computation, effects can be simulated that are otherwise difficult to measure, e.g., turn-to-turn voltages, quench propagation and recovery. The thermal model recently implemented in the CERN field computation program ROXIE is validated by means of measurements on model and prototype magnets, as well as data taken during the hardware commissioning of the LHC.
    IEEE Transactions on Applied Superconductivity 07/2009; · 1.32 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Quench simulation in superconducting magnets is a challenging task due to the interdependence of thermal, electrical, and magnetic phenomena. We present a new quench-simulation module in the CERN magnet-design program ROXIE. Thermal, electrical, and magnetic models are solved simultaneously. The integrated model helps to single out the impact of different phenomena. We can thus reach a deeper understanding of measured quench behavior. Moreover, the magnet-design process is improved due to the implementation within an integrated design and optimization environment. We compare simulations and measurements of the LHC main dipole magnet.
    IEEE Transactions on Applied Superconductivity 07/2008; · 1.32 Impact Factor

Full-text (2 Sources)

Available from
May 28, 2014