STI Publications - View Publication Form #17673

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Publication Information
Title Evaluation of flux expulsion and flux trapping sensitivity of SRF cavities fabricated from cold work Nb sheet with successive heat treatment
Abstract The main source of RF losses leading to lower quality factor of SRF cavities is due to the residual magnetic flux trapped during cooldown. The loss due to flux trapping is more pronounced for cavities subjected to impurities doping. The flux trapping and its sensitivity to rf losses are related to several intrinsic and extrinsic phenomena. To elucidate the effect of recrystallization by high temperature heat treatment on the flux trapping sensitivity, we have fabricated two 1.3 GHz single cell cavities from cold-worked Nb sheets and compared with cavities made from standard fine-grain Nb. Flux expulsion ratio and flux trapping sensitivity were measured after successive high temperature heat treatments as well as after low temperature, 120 0C baking. The cavity made from cold worked Nb showed better performance after 800 0C/3hr heat treatment and similar behavior when heat treated with additional 900 0C and 1000 0C compared to standard fine-grain Nb cavity. In this contribution, we pres
Author(s) B. Khanal, P. Dhakal
Publication Date July 2023
Category SRF Technology
Document Type Meeting, Proceedings
Primary Institution Thomas Jefferson National Accelerator Facility, Newport News
Affiliation Accelerator Ops, R&D / Inst for SRF Sci & Tech / SRF Research & Dev
Funding Source Nuclear Physics (NP)
Proprietary? No
This publication conveys Technical Science Results
Document Numbers
JLAB Number: JLAB-ACC-23-3923 OSTI Number: 2202370
LANL Number: Other Number: DOE/OR/23177-7223
Associated with an experiment No
Associated with EIC No
Supported by Jefferson Lab LDRD Funding No
Meeting / Conference
Meeting Name SRF2023 (21st International Conference on Radio-Frequency Superconductivity)
Meeting Date 6/25/2023
Document Subtype Abstract
Proceedings
Title SRF2023
Editor(s)
Publisher JACOW
Refereed No
Page Number 197
Year 2023
Attachments/Datasets/DOI Link
Document(s)
mopmb042.pdf (Accepted Manuscript)
DOI Link
Dataset(s) (none)
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