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of 126
pro vyhledávání: '"Lawrence Dresner"'
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 9:416-419
Since 1995 Southwire Company and Oak Ridge National Laboratory (ORNL) have jointly designed, built, and tested nine, 1 m long, high temperature superconducting (HTS) transmission cable prototypes. This paper summarizes the AC loss measurements of fiv
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 9:126-129
A one-meter long prototype transmission cable was constructed by Southwire Company consisting of four layers of helically wound Bi-2223/Ag HTS tapes. Measurements were made at Oak Ridge National Laboratory of the DC V-I characteristics and AC loss of
Autor:
Lawrence Dresner
Publikováno v:
Physica C: Superconductivity. 310:213-217
At 77 K, the resistivity of ceramic, high-temperature superconductors grows gradually rather than sharply with increasing current. The critical-state theory of hysteresis losses therefore needs to be modified. This has been done for slab conductors w
Autor:
Lawrence Dresner
Publikováno v:
Cryogenics. 38:205-209
This paper deals with the alternating current distribution in annular multilayer cables composed of power-law cryoconductive tapes, i.e. tapes for which the resistivity ρ is proportional to a power n of the current density ( ρ = kJ n ). An analytic
Autor:
Lawrence Dresner
Publikováno v:
Applied Superconductivity. 4:337-341
Simple formulas, given earlier (L. Dresner, Appl. Supercond., 4, 167 (1996)), for the AC hysteresis losses in high-temperature superconductors whose resistivity ϱ may be taken to vary as a power n of the current density J(ϱ = kJn), are compared wit
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 5:230-233
A high temperature superconducting magnet based on Bi-2223 conductor was built at the American Superconductor Corporation. The magnet was constructed by a react and wind technique using conductors made from a metallic precursor process. It has a wind
Autor:
Lawrence Dresner
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 5:214-217
This paper continues earlier work on the reduction of the quench pressure in a double-jacketed cable-in-conduit conductor achieved by perforating the inner jacket. The present study examines the effect of the perforations on the stability margin and
Autor:
Lawrence Dresner
Publikováno v:
Journal of Fusion Energy. 14:3-12
This paper reviews our progress during the last two decades in understanding cable-in-conduit conductors. The emphasis is on the physical principles governing the behavior of cable-in-conduit conductors, and no detailed mathematics is presented. The
Autor:
Lawrence Dresner
Publikováno v:
Cryogenics. 34:111-118
The propagation of normal zones in uncooled magnets has been studied. Special cases have been identified in which closed formulae for the propagation velocity can be obtained. An approximate formula is proposed for the more general case in which the
Autor:
Lawrence Dresner
Publikováno v:
Cryogenics. 34:77-82
The quench energies of uncooled superconductors are estimated based on the assumption that the specific heat and the normal state resistivity of the conductor can be approximated as power-law functions of the temperature. The results are applicable t