Field Dependence of the Critical Current Density of<tex>$rm MgB_2$</tex>Conductors Between 4.2 K and 30 K Up to 20 T

Field dependence of the critical current density of MgB2/Cu wire for coil development

“…The phase and crystal structure of all the samples were obtained using a Scintag diffractometer with Cu Kα radiation. Scanning electron microscopy (SEM) and electron dispersive spectroscopy (EDS) analyses were used to characterize the microstructure and surface analyses of the samples [14].…”

“…Since MgB 2 was discovered to be superconductive with a remarkable high critical temperature (at 39 K) for binary compounds, it has been fabricated in various forms such as bulk, single crystal, thin films, tapes and wires by using various methods [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. For large scale applications, it is essential to fabricate MgB 2 in long lengths and high electrical performance conductor form with low cost.…”

“…The effect of the annealing parameter on Cu/MgB 2 [2], Monel/Fe/MgB 2 +10% Si [13,14], Cu-Ni/MgB 2 , Fe/MgB 2 [2] sheet materials which were fabricated using the continuous tube forming and filling (CTFF) process by Hyper Tech Research Inc. were previously studied. Some of the current authors also fabricated and tested the first US MgB 2 coils using CTTF Cu/MgB 2 wires and the sol-gel insulation process at the National High Magnetic Field Laboratory (NHMFL) [12].…”