Thomas J. Tate

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— The design of a miniature quadrupole lens based on metallized glass electrodes mounted in two anisotropically etched silicon mounts that are separated by precision spacers is described. The analysis of conventional quadrupole lenses is first reviewed. The fabrication process is then described, and the analysis techniques are applied to the new geometry.(More)
Magnesium diboride, MgB2, has a relatively high superconducting transition temperature, placing it between the families of low- and high-temperature (copper oxide based) superconductors. Supercurrent flow in MgB2 is unhindered by grain boundaries, making it potentially attractive for technological applications in the temperature range 20-30 K. But in the(More)
A relatively high critical temperature, T c , approaching 40 K, places the recently-discovered [1] superconductor magnesium diboride (MgB 2) intermediate between the families of low-and copper-oxide-based high-temperature supercon-ductors (HTS). Supercurrent flow in MgB 2 is un-hindered by grain boundaries [2, 3], unlike the HTS materials. Thus, long(More)
/TiO 2 exhibit oscillations similar to that for p-GaInP 2 /Pt, meaning that the surface field increases substantially when the TiO 2 thickness increases from 0.5 to 35 nm. The formation and decay time constant of DF for these samples are extracted from the corresponding TPR kinetics (fig. S9B). Best-fit parameters are tabulated in table S1. Thicker TiO 2(More)
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