Magnetic field profiles of NbTi tapes

Low magnetic field Impact on NBTI degradation

This article presents the effect of low magnetic field (B<10 mT) on both Negative Bias Temperature Instability (NBTI) stress and recovery. This effect is study on commercial power double diffused MOS transistors (VDMOSFET). We show that the degradation is less important when the magnetic field is applied. The dynamic of the degradation change and the relaxation is accelerated. These results can...

Forensic acquisition and analysis of magnetic tapes

Recovering evidential data from magnetic tapes in a forensically sound manner is a difficult task. There are many different tape technologies in existence today and an even greater number of archive formats used. This paper discusses the issues and challenges involved in the forensic acquisition and analysis of magnetic tapes. It identifies areas of slack space on tapes and discusses the challe...

MgB2 superconducting tapes with mechanically alloyed precursor powders as a possible alternative to NbTi

Bi - 2212 r Ag tapes melt - grown under an elevated magnetic field ž / 0 – 10 T

Bi-2212rAg tapes with a thickness of 30 mm were melt-grown in elevated magnetic fields following two different thermal sequences. The transport critical current density, J dependence on the maximum processing temperature, cooling c rate, holding time and magnetic field was studied systematically. The quantity of impurity phase was decreased by reducing the holding time above the melting point o...

Losses in HTS Tapes due to AC External Magnetic Field and AC Transport Current

The E-J power law as electric characterization of the HTS material in Finite Element computations has shown good agreement with measurements of field-dependent critical current density and losses due to transport current. We use this technique to investigate the loss caused by AC transport current in self-field and in applied AC magnetic field in both rectangular monocore and multicore tapes, w...