o Introduction to superfluid helium: discovery of superfluidity, basic theoretical frameworks, two-fluid model
o Superfluid helium as a technical coolant: benefits of He II cooling for SC magnets and cavities, pressurized vs. saturated He II, fluid properties
o Practical cooling schemes: Roubeau & Claudet baths, conduction cooling, convective heat transport, LHC two-phase scheme
o Refrigeration below 2 K: challenges, efficiency
o Specific technology for He II systems: subcooling heat exchangers, leatightness
o Applications