Name: Cryostat Engineering for Helium Superconducting Devices
Start: 2022-11-07T08:30:00+01:00
End: 2022-11-09T17:30:00+01:00
Location: CERN

Cryostat Engineering for Helium Superconducting Devices

from Monday, November 7, 2022 (8:30 AM) to Wednesday, November 9, 2022 (5:30 PM)

Monday, November 7, 2022
8:30 AM Introduction - Vittorio Parma (CERN)
Introduction
- Vittorio Parma (CERN)
8:30 AM - 8:45 AM
Room: 593/R-010 - Salle 11 o Course structure and aims
8:45 AM Thermodynamics refresher - Philippe Lebrun (European Scientific Institute (FR))
Thermodynamics refresher
- Philippe Lebrun (European Scientific Institute (FR))
8:45 AM - 9:45 AM
Room: 593/R-010 - Salle 11 o Thermodynamic systems, thermodynamic states and equilibrium o First Principle: closed systems, open systems, internal energy, enthalpy o Second Principle: entropy, Carnot efficiency o Equations of state: from ideal gas to real fluids, thermodynamic diagrams
9:45 AM Coffee Break
Coffee Break
9:45 AM - 10:00 AM
Room: 593/R-010 - Salle 11
10:00 AM Helium refrigeration, part 1 - Guy GISTAU BAGUER
Helium refrigeration, part 1
- Guy GISTAU BAGUER
10:00 AM - 1:00 PM
Room: 593/R-010 - Salle 11 o Theory - reminders, - heat exchanger light theory (for specification), - cycles. o Technology - compressors.
1:00 PM Lunch Break
Lunch Break
1:00 PM - 2:00 PM
Room: 593/R-010 - Salle 11
2:00 PM Helium refrigeration, part 2 - Guy GISTAU BAGUER
Helium refrigeration, part 2
- Guy GISTAU BAGUER
2:00 PM - 3:00 PM
Room: 593/R-010 - Salle 11 o heat exchangers, o expansion turbines.
3:00 PM Visit of a CERN cryogenic installation (SM18)
Visit of a CERN cryogenic installation (SM18)
3:00 PM - 4:30 PM
Room: 593/R-010 - Salle 11 compressors (with all components visible), oil removal system, cold box, transfer line, liquid buffer, cryostat)

4:30 PM Coffee Break
Coffee Break
4:30 PM - 4:45 PM
Room: 593/R-010 - Salle 11
4:45 PM Cryostats for SC devices, part 1 - Vittorio Parma (CERN)
Cryostats for SC devices, part 1
- Vittorio Parma (CERN)
4:45 PM - 5:45 PM
Room: 593/R-010 - Salle 11 o Introduction to cryostats for SC devices, requirements o Examples of cryostats for SC magnets and SCRF cavities
Tuesday, November 8, 2022
8:30 AM Cryostats for SC devices, part 2 - Vittorio Parma (CERN)
Cryostats for SC devices, part 2
- Vittorio Parma (CERN)
8:30 AM - 10:30 AM
Room: 593/R-010 - Salle 11 o Mechanical design and construction of cryostats. Materials for cryostats and their properties. Supporting systems, pressure vessels, codes, and norms o Heat transfer mechanisms at cryogenic temperatures: conduction, radiation, convection. Thermal design and engineering solutions (thermal shielding, heat intercepts, feedthroughs, etc.) o Notions of cryogenic safety o Calculation tools
10:30 AM Coffee Break
Coffee Break
10:30 AM - 10:45 AM
Room: 593/R-010 - Salle 11
10:45 AM The technology of superfluid helium - Philippe Lebrun (European Scientific Institute (FR))
The technology of superfluid helium
- Philippe Lebrun (European Scientific Institute (FR))
10:45 AM - 12:45 PM
Room: 593/R-010 - Salle 11 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
12:45 PM Lunch Break
Lunch Break
12:45 PM - 1:45 PM
Room: 593/R-010 - Salle 11
1:45 PM Low temperature measurements and instrumentation - Juan Casas-Cubillos (CERN)
Low temperature measurements and instrumentation
- Juan Casas-Cubillos (CERN)
1:45 PM - 3:45 PM
Room: 593/R-010 - Salle 11 - Introduction o P&ID: LHC example o Workflow: requirement-> list candidates -> final selection - Metrology: - Standards o Absolute temperature scale - Instrumentation: o Instrumentation chain o Measurement of temperature -- Type of sensors -- Thermal anchoring -- Time response -- External effects -- Catastrophic events -- Signal conditioning o Stored liquid helium or LHe level measurement -- Type of measurement techniques -- SC level setting optimum excitation conditions -- External effects o Pressure -- Vacuum sensors -- Technical pressures -- External effects o Flow -- Type of sensors -- Flow conditioning o Output -- Heaters • Sizing electrical cables • Dielectric rupture (Paschen) • Power density (heat transfer) -- Valves • Valve types • Valve actuators
3:45 PM Coffee Break
Coffee Break
3:45 PM - 4:00 PM
Room: 593/R-010 - Salle 11

4:00 PM Tutorial: case study, part 1
Tutorial: case study, part 1
4:00 PM - 6:00 PM
Room: 593/R-010 - Salle 11
Wednesday, November 9, 2022

8:30 AM Tutorial: case study, part 2
Tutorial: case study, part 2
8:30 AM - 10:30 AM
Room: 593/R-010 - Salle 11

10:30 AM Coffee Break
Coffee Break
10:30 AM - 10:45 AM
Room: 593/R-010 - Salle 11

10:45 AM Presentations and discussion of case studies
Presentations and discussion of case studies
10:45 AM - 12:45 PM
Room: 593/R-010 - Salle 11

12:45 PM Wrap-up and conclusions on training
Wrap-up and conclusions on training
12:45 PM - 1:00 PM
Room: 593/R-010 - Salle 11

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