Zobrazeno 1 - 10
of 174
pro vyhledávání: '"J. O. WILLIS"'
Publikováno v:
IEEE Transactions on Applied Superconductivity. 21:2988-2991
We measure the current voltage (I-V) characteristics of high temperature superconductor coated conductors (HTS CCs) as a function of magnetic field, magnetic field angle, temperature, and position along multi-meter length practical wires. The critica
Autor:
Nicolas Lallouet, J. O. Willis, W. Romanosky, D. Madura, Jie Yuan, Alexis P. Malozemoff, Stephen P Ashworth, B. Gamble, H.-W. Neumueller, J. Maguire, Hans-Peter Kraemer, Alexander Otto, Douglas C. Folts, Wolfgang Schmidt, S. Ahmed
Publikováno v:
IEEE Transactions on Applied Superconductivity. 19:1950-1955
All over the world there is a growing need for current limiting devices in electrical networks with steadily increasing power demands and fault currents. Production of YBCO coated conductors (CCs) paves the way for the economic viability of supercond
Publikováno v:
IEEE Transactions on Applied Superconductivity. 19:3609-3613
A coated conductor wire produced by the MOD-RABiTS process was nondestructively characterized for I c uniformity along its length. Regions of interest were identified by variations in the I c-n value relationship. These regions were investigated usin
Publikováno v:
IEEE Transactions on Applied Superconductivity. 17:3394-3397
To measure the critical current of a long coated conductor tape as a function of angle, Ic(thetas), where thetas is the angle between the magnetic field B and the c-axis direction, we have solved the problems of measurement system geometry, size, and
Autor:
S. R. Foltyn, Quanxi Jia, Terry G. Holesinger, Leonardo Civale, Xiaoping Li, J. O. Willis, Wei Zhang, Judith L. MacManus-Driscoll, Haiyan Wang, Paul N. Arendt, J.Y. Coulter, Martin W. Rupich, Adriana Serquis, Boris Maiorov
Publikováno v:
Physica C: Superconductivity. :976-982
We present a study of the sharp peak that develops near the ab -plane orientation in the angular dependent critical current of YBa 2 Cu 3 O 7 (YBCO) films. This peak arises from correlated pinning associated to intrinsic pinning by the layered struct
Publikováno v:
phys. stat. sol. (a). 201:2880-2885
Nonvacuum dip-coating techniques were used to prepare Bi-2212 tapes on Ag/Ni clad substrates. The Bi-2212 tapes were doped with MgO nanoparticles at varying concentrations to obtain improved flux pinning. The tapes were characterized by X-ray diffrac
Publikováno v:
Physica C: Superconductivity. :1079-1084
We have irradiated a double pancake coil of Bi-2223/Ag sheathed tape with high energy protons, which yield splayed columnar defects in the superconductor core of the tape. We report the critical current Ic and current–voltage power law n value as a
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 13:1984-1987
A three-phase, 1200 A, 12.5 kV fault current controller using three high temperature superconducting, HTS 4 mH coils, was built by industry and tested in 1999 at the Center Substation of Southern California Edison in Norwalk, CA. During the testing,
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 13:1960-1963
We report on multiphase ac losses in four-layer prototype multi-strand conductors (PMC's) wound from HTS tape provided by American Superconductor Corporation. These conductors are prototype warm (near room temperature) dielectric cable designs, such
Autor:
R. Mele, G. Coletta, J. R. Clem, M. Nassi, J. O. Willis, M. P. Maley, D. E. Daney, H.J. Boenig
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 11:2188-2191
We report on multiphase AC losses in four-layer prototype multi-strand conductors (PMCs) wound from high temperature superconducting (HTS) tape provided by American Superconductor Corporation, "Two-phase" losses are induced with no current flowing in