High Q-factors are of utmost importance to minimize losses superconducting radio-frequency cavities deployed in continuous wave particle accelerators. This study elucidates the surface treatment that can maximize high-beta 650 MHz elliptical niobium cavities. State-of-the-art treatments applied many single-cell cavities, and resistance studies performed understand microwave dissipation at this ...

The technology for medical needle deburring and sharpening in mass-scale production was developed. The technology is based on the combined application of the high current microsecond electron beam irradiation and the ion sputtering in the low pressure glow discharge plasma with hollow cathode. As a result of the electron beam irradiation deburring and surface smoothening occur. Shape modificati...

The irradiation effects of thinning a sample of a Cu-Zn-Al shape memory alloy to electron transparency by a Ga(+) focused ion beam were investigated. This thinning method was compared with conventional electropolishing and Ar(+) ion milling. No implanted Ga was detected but surface FCC precipitation was found as a result of the focused ion beam sample preparation. Decreasing the irradiation dos...

We report here on the fabrication of porous anodic alumina PAA films from commercially available impure aluminum foil. While the expensive ultrapure PAA films are restricted to potential applications in nanoelectrophotonics, the impure PAA films are more suitable for large-scale applications, such as in catalysis and filtration. The anodization current behavior and chemical composition of the r...