Cryogenics and Superconductivity

The main effort of the group is concentrated on the optimisation of the helium cryogenic systems, especially on the possibilities of reduction of the undesirable heat flows. The heat flows are analysed by special numerical methods. The results achieved by the calculation procedures are verified experimentally and also by comparison with the parameters measured on the designed and realised devices. For example, cryostats of the superconducting magnets supporting the development of the NMR spectroscopy and tomography methods at our institute and also special instruments designed and manufactured for foreign institutions could be mentioned. As ultrahigh vacuum technology is an essential discipline applied in cryogenics, the problems of the vacuum generation and its long term maintenance in cryogenic devices are studied, too. The compatibility of the technological and safety standards in the field of cryogenics in the Czech Republic and in European countries is examined.

In the area of superconductivity the group is concerned with the development and generalisation of design approaches enabling realisation of magnetic systems that generate effectively magnetic fields with the defined space configuration. These approaches are used for designing magnetic systems for various physical experiments, such as homogeneous magnetic fields for NMR (excited by superconducting magnets), special shim coils magnetic field, low power consumption windings etc. The group is also engaged in the development of the measurement methods for the magnetic field mapping and suitable techniques for data acquisition.