Speaker
Description
Towards the construction of a muon cooling demonstrator, substantial R&D is needed to validate its key technologies and their integration in a compact cooling cell layout. A key step in the Muon Cooling Demonstrator programme is the construction of a test facility for 3 GHz RF cavities, to test the RF breakdown limit in a 7 T background field. The field is generated by a split-solenoid of 250 mm inner diameter, based on high-temperature superconductors (HTS), operating at 20 K in a cryogen-free configuration. To achieve compact windings, a layout based on dry-wound metal-insulated coils has been considered. The adoption of metal-insulation technology combines the advantages of non-insulated coils with a higher turn-to-turn resistance, hence reducing the coil characteristic time. To validate the technology and characterize the influence of winding tension, surface conditions and tape geometric non-conformities on the turn-to-turn surface contact resistance, a coil winding and test campaign has been initiated at INFN-LASA laboratory. This contribution presents the first results of the ongoing winding and testing campaign on metal-insulated coils. Prediction and validation of the measurement results has been carried out using a model based on a novel T-A formulation for non-insulated coils.
| What category does your poster fit in? | Muon Cooling Demonstrator |
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