Date of Award
Spring 5-2022
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Physics
Committee Director
Gianluigi Ciovati
Committee Member
Jean Delayen
Committee Member
Yuan Zhang
Abstract
The development of metallic coatings with high purity and high thermal conductivity at cryogenic temperature could be very important for application to the superconducting radiofrequency (SRF) cavity technology. The deposition of such bulk coatings on the outer surface of a niobium cavity could result in higher heat conductance and mechanical stiffness, both of which are crucial for enhancing the cavity performance at a reduced cost.
Cold spray technology was used to deposit bulk coatings of pure copper and copper-tungsten alloys on the niobium substrate and the samples of size 2 mm × 2 mm cross section were cut and subjected to annealing at various temperatures ranging from 300 ◦C to 1000 ◦C. Thermal conductivity and residual resistivity ratio (RRR) were measured for various samples. A maximum RRR value of ∼130 and ∼40 was measured for pure Cu samples and CuW samples, respectively. Scanning electron microscopy was used to analyze the grain growth, grain distribution and presence of contaminant particulates.
DOI
10.25777/c7nq-rq26
ISBN
9798819394243
Recommended Citation
Pokhrel, Himal.
"Development of High Conductivity Copper Coatings for SRF Cavity"
(2022). Master of Science (MS), Thesis, Physics, Old Dominion University, DOI: 10.25777/c7nq-rq26
https://digitalcommons.odu.edu/physics_etds/136
ORCID
0000-0002-4091-6393
Included in
Electrical and Computer Engineering Commons, Materials Science and Engineering Commons, Mechanical Engineering Commons, Physics Commons