Thermal Conductivity of Electroplated Copper Onto Bulk Niobium at Cryogenic Temperatures
| Autor: | Ciovati, Gianluigi, Dhakal, Pashupati, Parajuli, Ishwari, Saeki, Takayuki, Walive Pathiranage, Manula |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| DOI: | 10.18429/jacow-srf2021-wepfdv008 |
| Popis: | Superconducting radio-frequency (SRF) cavities made of high-purity bulk niobium are widely used in modern particle accelerators. The development of metallic outer coatings with high thermal conductivity would have a beneficial impact in terms of improved thermal stability, reduced material cost and for the development of conduction-cooled, cryogenic-free SRF cavities. Several high-purity, fine-grain Nb samples have been coated with 2’4 mm thick copper by electroplating. Measurements of the thermal conductivity of the bimetallic Nb/Cu samples in the range 2’7 K showed values of the order of 1 kW/(m K) at 4.3 K. Very good adhesion between copper and niobium was achieved by depositing a thin Cu layer by cold spray on the niobium, prior to electroplating the bulk Cu layer. Proceedings of the 20th International Conference on RF Superconductivity, SRF2021, East Lansing, MI, USA |
| Databáze: | OpenAIRE |
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