A Study of Surface Properties of Superconducting Materials for High Power Microwave Applications.

Abstract

We have investigated electric and magnetic critical field levels for Nb and Nb sub 3 Sn superconductors. Since the maximum power levesl for RF-Superconducting cavities seem to limited by maximum magnetic field capability, most of the work involved studies of the time dependence of flux penetration into Nb sub 3 Sn samples where maximum field limits are unknown. We find that the lower critical field (Hc sub 1) of Nb sub 3 Sn is about 600 gauss at low temperature and 2MHz frequency of applied field, but flux penetration occurs at very low level so that considerably higher field values will not lead to large power loss. Additional interesting effects are associated with Nb sub 3 Sn on Nb substrates which may also lead to increased peak power capability. Keywords: Superconducting RF, Nb3Sn Properties, Critical Fields Cavity loss mechanisms.

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Document Details

Document Type
Technical Report
Publication Date
Oct 31, 1985
Accession Number
ADA161740

Entities

People

  • Harry Suhl
  • Wayne Vernon

Organizations

  • University of California, San Diego

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • California
  • Classification
  • Critical Temperature
  • Electric Fields
  • Field Emission
  • Frequency
  • Geometry
  • Magnetic Fields
  • Materials
  • Measurement
  • Military Research
  • Physical Sciences
  • Security
  • Shape
  • Single Crystals
  • Surface Properties
  • Time Dependence

Fields of Study

  • Physics

Readers

  • Microwave Engineering.
  • Superconducting Magnet Technology

Technology Areas

  • Directed Energy
  • Directed Energy - Pulsed-Laser Deposition