Document Type

Conference Paper

Publication Date




Publication Title

LINAC 2022: Proceedings of the 31st International Linear Accelerator Conference



Conference Name

31st International Linear Accelerator Conference, 28 August- 2 September, 2022, Liverpool, United Kingdom


Over the past few decades, bulk niobium (Nb) has been the material of choice for superconducting radio frequency (SRF) cavities used in particle accelerators to achieve higher accelerating gradients and lower RF losses. Multi-layer (SIS) structures consisting of alternating thin layers of superconductor(S) and insulator(I) deposited on a bulk Nb have been proposed to enhance the peak surface magnetic field and sustain a higher accelerating gradient. In this study, multilayers based NbTiN and AlN deposited on bulk Nb are used to test the proposed enhancement using the DC magnetic Hall probe technique. The technique detects a penetrating magnetic field through the multilayer sample as it is placed under an external mag-netic field produced by a magnetic coil. This work reports the characterization and measurements of the magnetic field of full flux penetration through single layers of NbTiN and bilayers of NbTiN/AlN on bulk Nb.


Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) license. Any further distribution of this work must maintain attribution to the authors, the published article's title, publisher, and DOI.

Original Publication Citation

Senevirathne, I.H., Gurevich, A., Delayen, J.R., Beverstock, D.R. & Valente-Feliciano, A.M. (2022) Field shielding of NʙT��N based multilayer structure for accelerating cavities. In P. McIntosh, G. Burt, R. Apsimon, & V.R.W. Schaa (Eds.), LINAC 2022: Proceedings of the 31st International Linear Accelerator Conference (pp. 836-839). JACoW.


0000-0003-0126-8335 (Senevirathne), 0000-0003-0759-8941 (Gurevich)