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

Seal, D. and Malyshev, O. B. and Valizadeh, R. and Sian, T. and Marks, H. and Hryhorenko, O. and Longuevergne, D. and Pira, C. and Chyhyrynets, E. and Marshall, E. and Burt, G. (2022) RF Characterisation of Bulk Niobium and Thin Film Coated Planar Samples at 7.8 GHz. In: LINAC 2022 - International Linear Accelerator Conference, Proceedings :. Proceedings - Linear Accelerator Conference, LINAC . JACoW Publishing, GBR, pp. 819-822. ISBN 9783954502158

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Abstract

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 cavities is both costly and time-consuming. Instead, films are typically deposited on small, flat samples and characterised using a test cavity. A cost-effective facility for testing such samples has recently been built and commissioned at Daresbury Laboratory. The facility allows for low power surface resistance measurements at a resonant frequency of 7.8 GHz, temperatures down to 4 K and sample surface magnetic fields up to 1 mT. A brief overview of this facility as well as recent results from measurements of both bulk Nb and thin film coated samples will be presented.

Item Type:
Contribution in Book/Report/Proceedings
Additional Information:
Publisher Copyright: © 2022 Proceedings - Linear Accelerator Conference, LINAC. All rights reserved.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3107
Subjects:
?? atomic and molecular physics, and optics ??
ID Code:
222763
Deposited By:
Deposited On:
03 Dec 2024 14:35
Refereed?:
Yes
Published?:
Published
Last Modified:
03 Dec 2024 14:35