Cryostat Engineering for Helium Superconducting Devices
from
Monday 7 November 2022 (08:30)
to
Wednesday 9 November 2022 (17:30)
Monday 7 November 2022
08:30
Introduction
-
Vittorio Parma
(
CERN
)
Introduction
Vittorio Parma
(
CERN
)
08:30 - 08:45
Room: 593/R-010 - Salle 11
o Course structure and aims
08:45
Thermodynamics refresher
-
Philippe Lebrun
(
European Scientific Institute (FR)
)
Thermodynamics refresher
Philippe Lebrun
(
European Scientific Institute (FR)
)
08:45 - 09:45
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
09:45
Coffee Break
Coffee Break
09:45 - 10:00
Room: 593/R-010 - Salle 11
10:00
Helium refrigeration, part 1
-
Guy GISTAU BAGUER
Helium refrigeration, part 1
Guy GISTAU BAGUER
10:00 - 13:00
Room: 593/R-010 - Salle 11
o Theory - reminders, - heat exchanger light theory (for specification), - cycles. o Technology - compressors.
13:00
Lunch Break
Lunch Break
13:00 - 14:00
Room: 593/R-010 - Salle 11
14:00
Helium refrigeration, part 2
-
Guy GISTAU BAGUER
Helium refrigeration, part 2
Guy GISTAU BAGUER
14:00 - 15:00
Room: 593/R-010 - Salle 11
o heat exchangers, o expansion turbines.
15:00
Visit of a CERN cryogenic installation (SM18)
Visit of a CERN cryogenic installation (SM18)
15:00 - 16:30
Room: 593/R-010 - Salle 11
compressors (with all components visible), oil removal system, cold box, transfer line, liquid buffer, cryostat)
16:30
Coffee Break
Coffee Break
16:30 - 16:45
Room: 593/R-010 - Salle 11
16:45
Cryostats for SC devices, part 1
-
Vittorio Parma
(
CERN
)
Cryostats for SC devices, part 1
Vittorio Parma
(
CERN
)
16:45 - 17:45
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 8 November 2022
08:30
Cryostats for SC devices, part 2
-
Vittorio Parma
(
CERN
)
Cryostats for SC devices, part 2
Vittorio Parma
(
CERN
)
08:30 - 10:30
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
Coffee Break
Coffee Break
10:30 - 10:45
Room: 593/R-010 - Salle 11
10:45
The technology of superfluid helium
-
Philippe Lebrun
(
European Scientific Institute (FR)
)
The technology of superfluid helium
Philippe Lebrun
(
European Scientific Institute (FR)
)
10:45 - 12:45
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
Lunch Break
Lunch Break
12:45 - 13:45
Room: 593/R-010 - Salle 11
13:45
Low temperature measurements and instrumentation
-
Juan Casas-Cubillos
(
CERN
)
Low temperature measurements and instrumentation
Juan Casas-Cubillos
(
CERN
)
13:45 - 15:45
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
15:45
Coffee Break
Coffee Break
15:45 - 16:00
Room: 593/R-010 - Salle 11
16:00
Tutorial: case study, part 1
Tutorial: case study, part 1
16:00 - 18:00
Room: 593/R-010 - Salle 11
Wednesday 9 November 2022
08:30
Tutorial: case study, part 2
Tutorial: case study, part 2
08:30 - 10:30
Room: 593/R-010 - Salle 11
10:30
Coffee Break
Coffee Break
10:30 - 10:45
Room: 593/R-010 - Salle 11
10:45
Presentations and discussion of case studies
Presentations and discussion of case studies
10:45 - 12:45
Room: 593/R-010 - Salle 11
12:45
Wrap-up and conclusions on training
Wrap-up and conclusions on training
12:45 - 13:00
Room: 593/R-010 - Salle 11