Vortices in long Josephson junctions. Annual report No. 1, November 1985-November 1986

Technical Report · Mon Dec 01 04:00:00 EST 1986

OSTI ID:6867981

Nordman, J E; Beyer, J B

Research during the initial year of this grant concentrated on fabrication and modeling of long Josephson-junction structures. A particular effort was made to understand the basic operating mechanisms of a type of superconducting transistor, the vortex-flow transistor, and to optimize its circuit performance. Fabrication techniques were developed using niobium and lead superconductors. These techniques allow rapid production of a variety of device shapes. An optimization of geometric configuration was made to produce the most desirable device characteristics. Amplification was observed at low frequencies and initial-coupling circuit designs were made to enable high-frequency measurement. Development of potentially more versatile fabrication techniques using niobium and niobium nitride was also begun, as was a simulation study aimed primarily at understanding spatially nonuniform long junction structures.

• Research Organization: Wisconsin Univ., Madison (USA)
• OSTI ID: 6867981
• Report Number(s): AD-A-176916/5/XAB
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELEMENTS
FABRICATION
JOSEPHSON JUNCTIONS
JUNCTIONS
METALS
NIOBIUM
NIOBIUM COMPOUNDS
NIOBIUM NITRIDES
NITRIDES
NITROGEN COMPOUNDS
OPTIMIZATION
PNICTIDES
PRODUCTION
REFRACTORY METAL COMPOUNDS
SEMICONDUCTOR DEVICES
SIMULATION
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTORS
TRANSISTORS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VORTICES