Daniel Seal

Optimisation of Nb3Sn Thin Films for SRF Applications at Daresbury Laboratory

Christopher Benjamin, Graeme Burt, Eduard Chyhyrynets, James Conlon et autres

Nb3Sn is a promising alternative to bulk niobium (Nb) for superconducting radio-frequency (SRF) cavities due to its higher critical temperature and superheating field. In this study, Nb3Sn thin films were deposited via DC magnetron sputtering from a stoichiometric Nb:Sn alloy target onto …

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First 1.3 GHz Nb cavity coated with Nb3Sn thin film deposition by PVD magnetron sputtering

Reza Valizadeh, Christopher Benjamin, Graeme Burt, James Conlon et autres

Nb3Sn thin film cavities are new generation of superconducting cavities, which have the potential to replace traditional pure niobium cavities owing to their superior theoretical radio frequency (RF) performance. Higher theoretical acceleration gradient and quality factor give Nb3Sn cavities more possibilities in …

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Development of a 1.3 GHz longitudinally split RF research cavity for use in testing of superconducting thin films

Nathan Leicester, Christopher Benjamin, Graeme Burt, Eduard Chyhyrynets et autres

RF testing is a key element in the development of superconducting thin film coated cavities. In order to optimize the deposition process, tests initially focussed on flat samples, before moving on to RF cavity tests, however the jump from flat samples to …

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A LHe-free test facility for thin film SRF cavity testing

Daniel Seal, Graeme Burt, Nathan Leicester, Oleg Malyshev et autres

A new cryogenic facility for the RF testing of thin film coated SRF cavities has been designed and built at Daresbury Laboratory. This facility uses a pulse-tube cryocooler providing 2.7 W of cooling power at 4.2 K and enables cavity tests at: …

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A high throughput facility for the RF characterisation of planar superconducting thin films

Daniel Seal, O.B. Malyshev, P. Goudket, Tarsame S. Sian et autres

Abstract 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 …

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Author response for "A high throughput facility for the RF characterisation Of planar superconducting thin films"

Daniel Seal, O.B. Malyshev, P. Goudket, Taaj Sian et autres

Author response for "A high throughput facility for the RF characterisation Of planar superconducting thin films"

Daniel Seal, O.B. Malyshev, P. Goudket, Taaj Sian et autres

Author response for "A high throughput facility for the RF characterisation Of planar superconducting thin films"

Daniel Seal, O.B. Malyshev, P. Goudket, Taaj Sian et autres

Progress in European Thin Film Activities

C. Pira, Claire Antoine, O. Azzolini, Christopher J. Benjamin et autres

Thin-film cavities with higher Tc superconductors (SC) than Nb promise to move the operating temperature from 2 to 4.5 K with savings 3 orders of magnitude in cryogenic power consumption. Several European labs are coordinating their efforts to obtain a first 1.3 …

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The Digitalization of Well Intervention Operations: From Proof of Concept to Proof of Scale

Maisa Monteiro Da Cunha, Laura Helen Aldren, Kibir Desta, Donald Carnegie et autres

Abstract Objective/Scope As fields mature, the need to perform well interventions drastically increases. The process of identifying, requesting, and preparing an intervention is complex and data can be neither reliable nor easily accessible. Well Guardian, an innovative digital tool, was developed to …

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An active convective 4 He heat switch

Andrew May, S. Azzoni, S. J. Melhuish, L. Piccirillo et autres

The design and experimental demonstration are reported of an active convective heat switch suitable for use at cryogenic temperatures. The switch is mechanically simple, relatively inexpensive, and requires no moving parts, instead being operated entirely using heaters. The working gas used is …

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RF Characterisation of Bulk Niobium and Thin Film Coated Planar Samples at 7.8 GHz

Daniel Seal, Graeme Burt, Eduard Chyhyrynets, Oleksandr Hryhorenko et autres

Research is ongoing into the use of superconducting thin films to replace bulk niobium for future radio frequency (RF) cavities. A key part of this research requires measuring the RF properties of candidate films. However, coating and testing thin films on full-sized …

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