Document Type

Conference Paper

Publication Date

2022

DOI

10.18429/JACoW-NAPAC2022-WEPA27

Publication Title

NAPAC 2022: Proceedings of the North American Particle Accelerator Conference

Pages

683-686

Conference Name

5th North American Particle Accelerator Conference, 07-12 August 2022, Albuquerque, New Mexico

Abstract

Over the last decade much attention was given in increasing the quality factor of superconducting radio frequency (SRF) cavities by impurity doping. Prior to the era of doping, the final cavity processing technique to achieve the high accelerating gradient includes the "in situ" low temperature baking of SRF cavities at temperature ~ 120 °C for several hours. Here, we present the results of a series of measurements on 1.3 GHz TESLA shape single-cell cavities with successive low temperature baking at 120 °C up to 96 hours. The experimental data were analyzed with available theory of superconductivity to elucidate the effect of the duration of low temperature baking on the superconducting properties of cavity materials as well as the rf performance. In addition, the rf loss related to the trapping of residual magnetic field refereed as flux trapping sensitivity was measured with respect to the duration of 120 °C bake.

Rights

© The Authors 2022.

Content from this work may be used under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) license. Any distribution of this work must maintain attribution to the authors, title of the work, publisher, and DOI.

Original Publication Citation

Khanal, B. D., & Dhakal, P. (2022). Effect of duration of 120 °C baking on the performance on superconducting radio frequency niobium cavities. In S. Biedron, E. Simakov, S. Milton, P. M. Anisimov, V. R. W. Schaa (Eds.), NAPAC 2022: Proceedings of the North American Particle Accelerator Conference. JACoW Publishing. https://doi.org/10.18429/JACoW-NAPAC2022-WEPA27

ORCID

0000-0001-9299-3123 (Khanal), 0000-0002-9381-4091 (Dhakal)

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