Effect of oxide layer on microwave surface resistance of superconducting niobium
Conference
·
· IEEE Trans. Magn.; (United States)
OSTI ID:6389560
We have measured the influence of oxide layers on the surface resistance of niobium resonant cavities at temperatures below 1.4/sup 0/K. The 8.6 GHz cavity halves were drawn from high purity rolled sheet and electron beam welded together. We measured the resonance quality, Q, of several cavities after alternately removing and growing an oxide layer on the inside surface. Removal was accomplished by absorbing the oxygen into the bulk Nb, at 1100-1200/sup 0/C, the required temperature having been determined by Auger spectroscopy. Oxide layers were grown by admitting pure oxygen into the cavity at reduced pressure. We found that these oxide layers contribute a residual resistance of about10/sup -8/ ..cap omega...
- Research Organization:
- Laboratory of Nuclear Studies, Cornell University, Ithaca, NY
- OSTI ID:
- 6389560
- Report Number(s):
- CONF-840937-
- Conference Information:
- Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: MAG 21:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360104 -- Metals & Alloys-- Physical Properties
420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
AUGER ELECTRON SPECTROSCOPY
CAVITY RESONATORS
CHALCOGENIDES
CRYSTAL GROWTH
CRYSTALLOGRAPHY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON SPECTROSCOPY
ELECTRONIC EQUIPMENT
ENERGY
EQUIPMENT
FABRICATION
FREQUENCY RANGE
GHZ RANGE
GHZ RANGE 01-100
NIOBIUM ALLOYS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
Q-VALUE
RESONATORS
SPECTROSCOPY
SUPERCONDUCTING CAVITY RESONATORS
SUPERCONDUCTING DEVICES
SUPERCONDUCTIVITY
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
VERY HIGH TEMPERATURE
360104 -- Metals & Alloys-- Physical Properties
420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
AUGER ELECTRON SPECTROSCOPY
CAVITY RESONATORS
CHALCOGENIDES
CRYSTAL GROWTH
CRYSTALLOGRAPHY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON SPECTROSCOPY
ELECTRONIC EQUIPMENT
ENERGY
EQUIPMENT
FABRICATION
FREQUENCY RANGE
GHZ RANGE
GHZ RANGE 01-100
NIOBIUM ALLOYS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
Q-VALUE
RESONATORS
SPECTROSCOPY
SUPERCONDUCTING CAVITY RESONATORS
SUPERCONDUCTING DEVICES
SUPERCONDUCTIVITY
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
VERY HIGH TEMPERATURE