Zobrazeno 1 - 10
of 191
pro vyhledávání: '"P.V.P.S.S. Sastry"'
Publikováno v:
IEEE Transactions on Applied Superconductivity. 19:3637-3644
A versatile experimental facility was designed and set up to measure transport ac losses, magnetization ac losses, and total ac losses in high-temperature superconductors at variable temperatures. Several sets of measurements were carried out in the
Publikováno v:
IEEE Transactions on Applied Superconductivity. 17:3874-3879
Alternating current (ac) loss and quench behavior measurements were performed on a YBa2Cu3Ox coated conductor at 45 K. The minimum quench energies (MQEs) and the quench propagation velocities were measured as a function of transport current and frequ
Publikováno v:
Superconductor Science and Technology. 20:516-521
The critical currents and self-field ac losses of YBa2Cu3Oy coated conductors and (Bi,Pb)2Sr2Ca2Cu3Ox tapes were measured at several temperatures between 45 K and the respective critical temperature. The temperature dependence of ac losses was measur
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 15:2831-2834
Total AC losses in multi-filamentary, silver-sheathed Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub y/ (Bi-2223) tape were measured as functions of transport current, applied magnetic field and frequency by electromagnetic and calorimetric methods. Resul
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 15:2887-2890
In most power applications, the superconducting tapes carry AC transport currents and are exposed to applied AC or/and DC fields with different orientations. Because of the anisotropy of high temperature superconductors, AC losses depend on both the
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 15:2835-2838
Practical applications of HTS tapes cannot avoid various stresses and strains, including tension, bending and/or torsion. These loads directly affect the critical current and AC losses of HTS tapes. Thus the investigation of the effect of stress/stra
Publikováno v:
Journal of Materials Research. 19:2658-2664
The relative effects of Pb and Re doping on microstructure, irreversibility field, and electronic anisotropy of HgBa2Ca2Cu3O8+δ (Hg-1223) thick films grown on Ag substrates prepared by dip-coating were studied. Both Pb- and Re-doped films exhibit th
Publikováno v:
Superconductor Science and Technology. 17:1018-1021
When a coil or a winding is made, the superconducting tapes must be bent to different curvatures. Bending of high temperature superconducting (HTS) tapes can result in degradation of the critical current density and thus increase the AC losses of the
Publikováno v:
Superconductor Science and Technology. 17:314-319
The current–voltage characteristic hysteresis of Bi-2223 tape in a silver matrix cooled by liquid nitrogen (LN2) at 77 K can be interpreted thermally, i.e. while the ramping-up temperature of the tape is higher than the ramping-down temperature for
Publikováno v:
Superconductor Science and Technology. 16:1134-1138
(Hg, Re)Ba2Ca2Cu3O8+δ ((Hg, Re)-1223) samples have been fabricated by wrapping Re0.2Ba2Ca2Cu3Oy precursor powder within Ag foil and pressing or rolling. The Ag/precursor composite is then reacted with CaHgO2 in sealed reaction tubes. X-ray diffracti