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## A facility for the characterisation of planar multilayer structures with preliminary niobium results

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Published

### Standard

A facility for the characterisation of planar multilayer structures with preliminary niobium results. / Turner, Dan; Malyshev, Oleg; Burt, Graeme et al.

In: Superconductor Science and Technology, Vol. 35, No. 9, 095004, 20.07.2022.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

### Harvard

Turner, D, Malyshev, O, Burt, G, Junginger, T, Valizadeh, R & Gurran, L 2022, 'A facility for the characterisation of planar multilayer structures with preliminary niobium results', Superconductor Science and Technology, vol. 35, no. 9, 095004. https://doi.org/10.1088/1361-6668/ac7fbf

### APA

Turner, D., Malyshev, O., Burt, G., Junginger, T., Valizadeh, R., & Gurran, L. (2022). A facility for the characterisation of planar multilayer structures with preliminary niobium results. Superconductor Science and Technology, 35(9), [095004]. https://doi.org/10.1088/1361-6668/ac7fbf

### Vancouver

Turner D, Malyshev O, Burt G, Junginger T, Valizadeh R, Gurran L. A facility for the characterisation of planar multilayer structures with preliminary niobium results. Superconductor Science and Technology. 2022 Jul 20;35(9):095004. doi: 10.1088/1361-6668/ac7fbf

### Author

Turner, Dan ; Malyshev, Oleg ; Burt, Graeme et al. / A facility for the characterisation of planar multilayer structures with preliminary niobium results. In: Superconductor Science and Technology. 2022 ; Vol. 35, No. 9.

### Bibtex

@article{13726cb616a74701aefc9536dbcec5db,
title = "A facility for the characterisation of planar multilayer structures with preliminary niobium results",
abstract = "The maximum accelerating gradient of superconducting radio frequency cavities are currently reaching their theoretical limits, due to the magnetic field entering the superconductor in the form of vortices. To overcome these limits, thin film coated superconducting materials are required, however these need to be tested to optimise their properties. A system has been designed, built, and commissioned at Daresbury Laboratory that applies a local DC magnetic field parallel to the surface, from one side of a sample, similar to that in cavity operation. A magnetic flux density (up to 600 mT) is generated parallel to the sample surface in the 2 mm gap of a C-shaped ferrite yoke. Two Hall probe sensors are used to measure both the applied and penetrated magnetic field. The system operates in a cryogen free environment, with a minimum temperature of approximately 2.6 K. A Pb foil has been used to characterise the system, and determine how the sample size affects the results. Nb thin film samples have been tested for varying thickness to determine how the depth effects the field of full flux penetration, $B_\mathrm{fp}$. The design, operation, methods of analysis and first results of this facility will be reported in this paper.",
keywords = "superconductivity, magnetic field penetration, lead, niobium, type I, type II, superconducting radio frequency",
author = "Dan Turner and Oleg Malyshev and Graeme Burt and Tobias Junginger and Reza Valizadeh and Lewis Gurran",
year = "2022",
month = jul,
day = "20",
doi = "10.1088/1361-6668/ac7fbf",
language = "English",
volume = "35",
journal = "Superconductor Science and Technology",
issn = "0953-2048",
publisher = "IOP Publishing Ltd.",
number = "9",

}

### RIS

TY - JOUR

T1 - A facility for the characterisation of planar multilayer structures with preliminary niobium results

AU - Turner, Dan

AU - Malyshev, Oleg

AU - Burt, Graeme

AU - Junginger, Tobias

AU - Gurran, Lewis

PY - 2022/7/20

Y1 - 2022/7/20

N2 - The maximum accelerating gradient of superconducting radio frequency cavities are currently reaching their theoretical limits, due to the magnetic field entering the superconductor in the form of vortices. To overcome these limits, thin film coated superconducting materials are required, however these need to be tested to optimise their properties. A system has been designed, built, and commissioned at Daresbury Laboratory that applies a local DC magnetic field parallel to the surface, from one side of a sample, similar to that in cavity operation. A magnetic flux density (up to 600 mT) is generated parallel to the sample surface in the 2 mm gap of a C-shaped ferrite yoke. Two Hall probe sensors are used to measure both the applied and penetrated magnetic field. The system operates in a cryogen free environment, with a minimum temperature of approximately 2.6 K. A Pb foil has been used to characterise the system, and determine how the sample size affects the results. Nb thin film samples have been tested for varying thickness to determine how the depth effects the field of full flux penetration, $B_\mathrm{fp}$. The design, operation, methods of analysis and first results of this facility will be reported in this paper.

AB - The maximum accelerating gradient of superconducting radio frequency cavities are currently reaching their theoretical limits, due to the magnetic field entering the superconductor in the form of vortices. To overcome these limits, thin film coated superconducting materials are required, however these need to be tested to optimise their properties. A system has been designed, built, and commissioned at Daresbury Laboratory that applies a local DC magnetic field parallel to the surface, from one side of a sample, similar to that in cavity operation. A magnetic flux density (up to 600 mT) is generated parallel to the sample surface in the 2 mm gap of a C-shaped ferrite yoke. Two Hall probe sensors are used to measure both the applied and penetrated magnetic field. The system operates in a cryogen free environment, with a minimum temperature of approximately 2.6 K. A Pb foil has been used to characterise the system, and determine how the sample size affects the results. Nb thin film samples have been tested for varying thickness to determine how the depth effects the field of full flux penetration, $B_\mathrm{fp}$. The design, operation, methods of analysis and first results of this facility will be reported in this paper.

KW - superconductivity

KW - magnetic field penetration

KW - niobium

KW - type I

KW - type II

U2 - 10.1088/1361-6668/ac7fbf

DO - 10.1088/1361-6668/ac7fbf

M3 - Journal article

VL - 35

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

SN - 0953-2048

IS - 9

M1 - 095004

ER -