We report on the microwave properties of a resonant cylindrical cavity made of bulk MgB2 superconductor, produced by the reactive liquid Mg infiltration process. The frequency response of the cavity has been measured in the range 5÷ 13 GHz. Among the various modes, the TE011, resonating at 9.79 GHz, exhibits the highest quality factor. For this mode, we have determined the temperature dependenc...

We present the fabrication and test results of Hot-Isostatic-Pressed (HIPed) Powder-in-Tube (PIT) MgB2 coils. The coils properties were measured by transport and magnetization at different applied fields (H) and temperatures (T ). The engineering critical current (Je) value is the largest reported in PIT MgB2 wires or tapes. At 25 K our champion 6-layer coil was able to generate a field of 1 T ...

Owing to the linguistic richness of Arabic language, which contains more than 6000 roots, building a reliable language model for speech recognition systems faces many challenges. This paper introduces free automatic system Modern Standard based on an end-to-end-based Deep Speech architecture developed by Mozilla. The proposed uses character-level sequence-to-sequence map character alignment pro...

We report a detailed study of the electronic structure of the MgB2 with different lattice constants by using the full-potential linearized augmented plane wave(FPLAPW) method. It is found that the lattice parameters have great effect on the σ band of Boron. Our results indicate that increasing lattice constant along the c axis will increase the density of states(DOS) at the Fermi level, making ...

We present results on MgB2 hot-electron bolometer noise measurements to show reproducibility of achieved results and robustness of the fabricated devices, which being passivated with silicon nitride shows the same performance after 1.5 year storing in nitrogen atmosphere. Noise temperature measurements were performed for the HEB made of 10nm MgB2 thin film on Al2O3 with Tc of 8.5K for 1.6THz LO...

We have studied temperature evolution of the local as well as the average crystal structure of MgB2 and Mg0.5Al0.5B2 using real-space atomic pair distribution function (PDF) measured by high resolution neutron powder diffraction in a wide temperature range of T = 10–600 K. The mean square relative displacements (MSRD) of atomic B–B, B–Mg (B–Al) pairs are compared with mean-square displacements ...