Developments for future electromagnets

last update : 12-20 18:05:37-2013 (2478)

Developing ceramic insulation for superconducting cables
The aim of developing ceramic electrical insulation is to study the implementation of insulation that can withstand the high-temperature heat treatment (600 to 700°C) required for the formation of certain superconductors, in particular those made of niobium-tin (Nb3Sn). The conductors are covered with fibreglass ribbon coated with precursors which react during the heat cycle, forming the insulation and ensuring the mechanical strength of the coil. In this way, two difficult stages of ... More »
Heat transfer through porous mediums in superfluid helium
It is necessary for manufacturers of superconducting magnets to understand the heat transfer in the windings in order to study thermal stability. For magnets cooled by superfluid helium, such as for example the dipoles and quadrupoles of the LHC, thermal resistance, created by the electrical insulation of the cables, forms the main thermal barrier against cooling. The emergence of Nb3Sn magnets with a strong magnetic field has led designers to research new insulation systems made from ... More »
Niobium-tin quadrupole model
  The objective of the project is to design, build and cold test a niobium-tin (Nb3Sn) quadrupole magnet prototype based on the design of the quadrupole magnets in the LHC, made of niobium-titanium (NbTi). The critical temperature and critical field of the superconducting compound Nb3Sn are around double that of NbTi. However, it has some disadvantages. A high temperature thermal treatment is needed to produce it (greater than 600°C) and it is very fragile, with critical parameters ... More »
Use of superconductors at high critical temperatures
  Physicists and engineers have always been intrigued by high transition temperature superconducting materials ever since their discovery in 1986 by Bednorz and Muller. These materials offer new prospects for the SACM. Not only is their ability to transport an intensive electrical current at superconducting state preserved at temperatures in excess of 60K (for certain materials), but most importantly they keep their superconducting properties with an induction of 30T, providing they are ... More »