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University of Illinois at Urbana-Champaign
An Ultrasonic Study of Trapped Hydrogen Tunneling Systems in Niobium and Tantalum
Abstract
dc:descriptionThe properties of trapped hydrogen tunneling systems in Nb and the analogous systems, H in Ta, and D in Nb have been studied with ultrasonic techniques at low temperature. Attenuation due to H in Ta was measured between 0.5 K and 10 K for frequencies between 10 MHz and 55 MHz. The sound velocity change due to H in Nb was measured in both the normal and superconducting state at 10.8 MHz and 33 MHz at temperatures between 0.5 K and 18 K. The attenuation and velocity change due to trapped D in Nb was measured in both the superconducting and normal states for two concentrations of oxygen trapping impurity.
Degree
thesis:*- Name thesis:degree_name
- Ph.D.
- Level thesis:degree_level
- Dissertation
- Discipline thesis:degree_discipline
- Physics
- Grantor
- University of Illinois at Urbana-Champaign
- Year dc:date
- 2015
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
-
- Maschhoff, Kevin Robert
Subjects
dc:subject × 1Rights
- Language dc:language
- eng
Identifiers
dc:identifier.*- Identifier
- (UMI)AAI8701559
- OAI identifier oai:identifier
- oai:www.ideals.illinois.edu:2142/77395