Bertrand Baudouy

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The main superconducting magnets (bending dipoles and focusing quadrupoles) for the Large Hadron Collider (LHC), presently under construction at CERN at the outskirts of Geneva (Switzerland), use superconducting cables made from copper-matrix / niobiumtitanium-superconductor strands. The strands for the LHC magnets have typically a diameter of 1mm, a copper(More)
In the field of applied superconductivity, there is a growing need to better understand heat transfers in superconducting accelerator magnets. Depending on the engineering point of view looked at, either 0-D, 1-D, 2D or 3Dmodeling may be needed. Because of the size of these magnets, alone or coupled together, it is yet, impossible to study this numerically(More)
The commissioning and the exploitation of the LHC require a good knowledge of the stability margins of the superconducting magnets with respect to beam induced heat depositions. Previous studies showed that simple numerical models are suitable to carry out stability calculations of multi-strands cables, and highlighted the relevance of the heat transfer(More)
This paper presents a segregated algorithm to solve numerically the superfluid helium (He II) equations using the two-fluid model. In order to validate the resulting code and illustrate its potential, different simulations have been performed. First, the flow through a capillary filled with He II with a heated area on one side is simulated and results are(More)
We investigate numerically, for the first time, the thermal counterflow of superfluid helium past a cylinder by solving with a finite volume method the complete so-called two-fluid model. In agreement with existing experimental results, we obtain symmetrical eddies both up- and downstream of the obstacle. The generation of these eddies is a complex(More)
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