Advanced Characterization of Materials for Superconducting Radiofrequency Accelerator Cavities

Particle accelerators are a leading tool for frontier science. Pushing that frontier further demands more machines with higher performance, and more of a very expensive technology: superconducting radio-frequency (SRF) acceleration. From a materials perspective this means reducing residual surface resistance or raising the operating temperature (currently ~2 K) of SRF cavities. Both are pursued by materials modification: nitrogen doping/infusion in the first instance and coating with Nb3Sn in the second. Materials characterization is key to achieving understanding and directing RandD. However, very little has been done. This present work aims to fill the knowledge gap and to provide needed, validated tools to the accelerator science community. In this connection, SIMS, XPS and EBSD have proven especially valuable and represent the majority of discussion in this dissertation.

Name thesis:degree_name

Doctor of Philosophy

Level thesis:degree_level

doctoral

Discipline thesis:degree_discipline

Materials Science and Engineering

Department dc:contributor.department

Materials Science and Engineering

Grantor dc:publisher

Virginia Tech

Year dc:date.issued

2019

Author dc:creator

• Tuggle, James Robert Jr.

Chair dc:contributor.committeechair

• Kelley, Michael J.

Committee members dc:contributor.committeemember

• Reynolds, William T. Jr.
• Aning, Alexander O.
• Stevie, Fred A.
• Reece, Charles E.

• Materials Characterization
• Niobium
• Nb3Sn
• Superconducting
• SRF
• Particle Accelerator
• SIMS
• XPS
• EBSD

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Dc Identifier Other

vt_gsexam:19891

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/90574