Webster C. Cash

Learn More
CASE HISTORY Outbreaks of mortality in South Island saddlebacks (Philesturnus carunculatus carunculatus) that had been translocated to two offshore islands in the Marlborough Sounds of New Zealand were investigated during the summers of 2002 and 2007. Both outbreaks were associated with a severe decrease in numbers of saddlebacks of up to 60% of(More)
Reflectance vs incidence angle measurements have been performed from 24 A to 1216 A on electron-beam evaporated samples of Ti, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Hf, Ta, W, Re, Os, Ir, Pt, and Au, and using a nonlinear least-squares curve-fitting technique, the optical constants have been determined. Independently measured values of the incident beam polarization,(More)
A method for deriving optical constants from reflectance vs angle of incidence measurements using a nonlinear least-squares curve-fitting technique based on the chi(2) test of fit is presented and used to derive optical constants for several thin-film materials. The curve-fitting technique incorporates independently measured values for the film surface(More)
Vic Argabright, Bill Arnold, David Aronstein, Paul Atcheson, Morley Blouke, Tom Brown, Daniela Calzetti, Webster Cash, Mark Clampin, Dave Content, Dean Dailey, Rolf Danner, Rodger Doxsey, Dennis Ebbets, Peter Eisenhardt, Lee Feinberg, Ed Freymiller, Andrew Fruchter, Mauro Giavalisco, Tiffany Glassman, Qian Gong, James Green, John Grunsfeld, Ted Gull, Greg(More)
It is shown that by using the conical diffraction mount existing echelle gratings can be used at grazing incidence to achieve high spectral resolution in the extreme UV and soft x rays. Design considerations for grazing incidence echelle spectrographs are examined, and two sample designs are discussed. The first, for use in the extreme UV has a primary(More)
We report measurements of reflection efficiencies from 44 A to 1048 A for samples of polished nickel, diamond-turned aluminum, and various thicknesses of gold evaporated onto the nickel and aluminum samples. The reflection efficiencies are presented for grazing angles from 5 degrees to 75 degrees . For wavelengths longer than ~100 A, the gold-coated nickel(More)