[HTML][HTML] RF surface resistance tuning of superconducting niobium via thermal diffusion of native oxide

EM Lechner, JW Angle, FA Stevie, MJ Kelley… - Applied Physics …, 2021 - pubs.aip.org
Recently, Nb superconducting radio frequency cavities vacuum heat treated between 300
and 400 C for a few hours have exhibited very high quality factors (∼ 5× 10 10 at 2.0 K) …

Influence of furnace baking on Q–E behavior of superconducting accelerating cavities

H Ito, H Araki, K Takahashi… - Progress of Theoretical …, 2021 - academic.oup.com
The performance of superconducting radio-frequency (SRF) cavities depends on the
condition of the niobium surface. Recently, various heat treatment methods have been …

The oxidation behaviors of high-purity niobium for superconducting radio-frequency cavity application in vacuum heat treatment

M Yu, G Pu, Y Xue, S Wang, S Chen, Y Wang, L Yang… - Vacuum, 2022 - Elsevier
To explore the impact mechanism of vacuum heat treatment on the performance of
Superconducting Radio-Frequency (SRF) Cavities, especially in the medium temperature …

Systematic study of niobium thermal treatments for superconducting radio frequency cavities employing x-ray photoelectron spectroscopy

A Prudnikava, Y Tamashevich… - Superconductor …, 2022 - iopscience.iop.org
The structural and chemical composition of the surface layer (100–140 nm) of niobium
radiofrequency cavities operating at cryogenic temperature has enormous impact on their …

Unraveling the Nanoscale Segregation Mechanism in N‐Doped Niobium for Enhanced SRF Performance

Z Chen, Y Zong, Y Chai, ME, Y He, S Shi, J Cai… - Small …, 2024 - Wiley Online Library
The nitrogen doping (N‐doping) treatment for niobium superconducting radio‐frequency
(SRF) cavities is one of the key enabling technologies that support the development of more …

Accelerating gradient improvement in nitrogen-doped superconducting radio-frequency cavities for SHINE

Y Zong, JF Chen, D Wang, QX Chen, ZX Chen… - Nuclear Instruments and …, 2023 - Elsevier
Several state-of-the-art recipes have been studied to pursue high quality factor (Q) and
higher accelerating gradient (E acc) on superconducting radio-frequency (SRF) cavities for …

Grain boundary segregation and carbide precipitation in heat treated niobium superconducting radio frequency cavities

A Dangwal Pandey, TF Keller, M Wenskat… - Applied Physics …, 2021 - pubs.aip.org
A fundamental understanding of superconducting radio frequency Nb cavity processing is
necessary to achieve the desired improvement in their performance, which is needed for …

In-situ synchrotron x-ray photoelectron spectroscopy study of medium-temperature baking of niobium for SRF application

A Prudnikava, Y Tamashevich… - Superconductor …, 2024 - iopscience.iop.org
In order to determine optimal parameters of vacuum thermal processing of superconducting
radiofrequency niobium cavities exhaustive information on the initial chemical state of …

A DFT study on nitrogen enhancing mechanism of SRF niobium cavity performance

Y Chen, F Yang, M Wang, Z Ye, J Wei, T Gao… - Computational Materials …, 2024 - Elsevier
High-temperature nitriding has been shown to improve the quality factor (Q) of the
superconducting radio frequency (SRF) cavity recently, while its inherent promoting …

Study on the interstitial oxygen diffusion to understand the reduction of cryogenic RF loss for the superconducting radio-frequency niobium cavities

M Yu, S Huang, Y Zhao, X Gu, L Peng… - Superconductor …, 2024 - iopscience.iop.org
Medium-temperature baking (Mid-T baking) is an innovative method employed to enhance
the unloaded quality factor Q 0 of superconducting radio-frequency niobium (SRF Nb) …