50-Hz ac losses in inductive coils with mixed matrix fine filament NbTi composites at fields up to 1 T

Journal Article · Thu Sep 01 00:00:00 EDT 1983 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.332695· OSTI ID:5654403

Hlasnik, I; Seibt, E W

Measurements of 50-Hz ac losses were performed using three characteristic NbTi coil samples with ultrafine filaments and a Cu--CuNi mixed matrix at fields up to 1 T and at 4.2 K. Critical current and quenching current densities were measured under dc and ac conditions as well as the losses with their hysteresis and eddy current loss proportions. To characterize the samples by their eddy current loss proportions the transverse resistivity of the matrix rho/sub trans/ was determined. The results for losses show that under 50-Hz ac loads alternating fields up to approximately 1 T are attained without quenching. The fact that the associated eddy current losses of about 10/sup 5/ W/m/sup 3/ remain comparatively low at 0.5 T and 4.2 K opens up for such structured mixed matrix NbTi composites a novel field of application for superconducting generators and pulsed magnets with 50--60 Hz fed windings.

• Research Organization: Kernforschungszentrum Karlsruhe, Institut fuer Technische Physik, Postfach 3640, D-7500 Karlsruhe 1, Federal Republic of Germany
• OSTI ID: 5654403
• Journal Information: J. Appl. Phys.; (United States), Vol. 54:9
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
36 MATERIALS SCIENCE
COPPER ALLOYS
SUPERCONDUCTIVITY
NICKEL ALLOYS
NIOBIUM ALLOYS
SUPERCONDUCTING COILS
AC LOSSES
CRITICAL CURRENT
EDDY CURRENTS
TITANIUM ALLOYS
COMPOSITE MATERIALS
COPPER
ELECTRIC CONDUCTIVITY
FILAMENTS
HYSTERESIS
MATRIX MATERIALS
QUENCHING
SUPERCONDUCTING COMPOSITES
ULTRALOW TEMPERATURE
WIRES
ALLOYS
CURRENTS
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELEMENTS
ENERGY LOSSES
LOSSES
MATERIALS
METALS
PHYSICAL PROPERTIES
TRANSITION ELEMENTS
420201* - Engineering- Cryogenic Equipment & Devices
360104 - Metals & Alloys- Physical Properties