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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Malyshev, Oleg
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2024V₃Si: an alternative thin film material for superconducting RF cavities
- 2024Upgraded multiprobe sample inserts for thin film SRF cavity developments
- 2024A high throughput facility for the RF characterisation Of planar superconducting thin films
- 2023V3Si Thin Films for SRF Applications
- 2023The effect of small bends in thin non-evaporable getter coated tubes on the partial pressure ratio as a function of sticking probability
- 2023Deposition and Characterisation of V₃Si films for SRF Applications
- 2022A First 6 GHz Cavity Deposition with B1 Superconducting Thin Film at ASTeC
- 2019PVD Depostion of Nb₃Sn Thin Film on Copper Substrate from an Alloy Nb₃Sn Target
- 2019Impact of the Cu Substrate Surface Preparation on the Morphological, Superconductive and RF Properties of the Nb Superconductive Coatings
- 2017Atomic Layer Deposition of Niobium Nitride from Different Precursors
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article
A high throughput facility for the RF characterisation Of planar superconducting thin films
Abstract
<jats:title>Abstract</jats:title><jats:p>Accelerator laboratories worldwide are researching copper radio frequency (RF) cavities coated with superconducting thin films to exceed the limits of bulk niobium. The development and RF testing of thin films on small planar samples is vital before cavity depositions. A team at Daresbury Laboratory have developed a cost-effective facility using a novel 7.8 GHz Choke Cavity for the RF characterisation of planar samples. RF chokes ensure that no electrical contact is required between the sample and the cavity. The main advantages are: a simple sample design (90 − 130 mm diameter disk with no sample-cavity welding) and easy operation using a LHe-free cryostat. This enables high sample throughput, with up to 3 sample tests per week, making the facility suitable for quick, systematic scanning of deposition parameters. With the sample thermally and physically isolated from the test cavity, it is possible to measure the average surface resistance, <jats:italic>R</jats:italic><jats:sub>s</jats:sub>, directly using an RF-DC compensation method. Facility commissioning has been performed with bulk and thin film niobium samples. These tests have demonstrated the ability to measure <jats:italic>R</jats:italic><jats:sub>s</jats:sub> at temperatures in the range 4 − 20 K and sample peak magnetic fields up to 3 mT. The minimum resolvable <jats:italic>R</jats:italic><jats:sub>s</jats:sub> is 0.5 μΩ with typical uncertainties of 9 − 15%. The design, operation and commissioning of this facility is reported in this paper.</jats:p>