Accession Number:

ADA220423

Title:

Effects of Large Doses of High Energy Electrons on a YBa2Cu3O6 + delta High Temperature Superconductors

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1989-12-01

Pagination or Media Count:

112.0

Abstract:

Two samples of YBa2Cu3O6 delta high temperature 93 K superconductor samples were irradiated with 67 MeV electrons. Both samples were cut from the same parent, manufactured by the University of Houston. Radiation effects were studied by measuring resistance as a function of dose during exposure. The samples were exposed to dose up to 100 Mrads. One sample was irradiated at near room temperature, while the second sample was irradiated at 30 K, below the superconducting transition temperature. Resistance as a function of temperature data was obtained prior to and immediately after exposures for both samples. The samples evidenced little or no shifts due to radiation effects in either the normal state resistance or the transition temperature outside of measurement accuracies. Both samples showed evidence of overall crumbling and flaking of the leads, likely due to the continual thermal expansion and contraction of the different materials throughout the different measurements. These mechanical effects produced measurable changes in the normal state resistances. It is concluded that the YBa2Cu3O6 delta superconductor is significantly radiation-hard. AW

Subject Categories:

  • Electromagnetic Shielding
  • Ceramics, Refractories and Glass
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE