LEMON · LARGE-SCALE MAGNETIC COOLING

The objective of the LEMON project is the development and technical demonstration of a process for the scalable, permanent, helium-3-free generation of very low (cryogenic) milli-Kelvin temperatures based on continuous Adiabatic Demagnetization Refrigeration (cADR). It is aimed at providing the technical basis for large-scale refrigeration systems with, in principle, arbitrarily high cooling capacities at cryogenic temperatures, by connecting the same basic cooling unit together many times. The proposed novel approach to large-scale cryogenic cooling promises to meet for the first time the growing and diverse cooling requirements in the field of quantum technologies, especially in the field of quantum computing (QC). It will make the high cooling powers required for QC (in the range of some hundred µW to several ten mW) available for the first time ever, thereby lifting the disruptive and ultimately economic potential of QC. In addition, the dependence on the critical resource helium-3, which is only available to a very limited extent in the EU and so far cannot be substituted, will be resolved; Overall, a decisive contribution can be made to the technological sovereignty, competitiveness and technological leadership of the EU in the field of applied quantum technologies.