Title page for ETD etd-11102005-141104


Type of Document Dissertation
Author Liang, Changnian
URN etd-11102005-141104
Title A new surface resistance measurement method with ultrahigh sensitivity
Degree PhD
Department Physics
Advisory Committee
Advisor Name Title
No Advisors Found
Keywords
  • Superconductors Mathematical models
  • Calorimetry
  • Superconductivity
Date of Defense 1993-05-05
Availability restricted
Abstract

A superconducting niobium triaxial cavity has been designed and fabricated to study residual surface resistance of planar superconducting materials. Unlike many other structures where the test samples are placed in strong magnetic field positions, the edge of a 25.4 mm or larger diameter sample in the triaxial cavity is located outside the strong field region. Therefore, the edge effects and possible losses between the thin film and the substrate have been minimized in this design, ensuring that the induced RF losses are intrinsic to the test material. The fundamental resonant frequency of the cavity is 1.5 GHz, the same as the working frequency of CEBAF cavities. The cavity has a compact size compared to its TE011 counterpart, which makes it more sensitive to the sample's loss.

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