Zobrazeno 1 - 10
of 39
pro vyhledávání: '"R Steven, Turley"'
Autor:
Jennifer Nielson, R. Steven Turley, Geoff Wright, Jamie L. Jensen, Richard E. West, Michael C. Johnson, Rebecca L. Sansom
Publikováno v:
Educational Technology Research and Development
This paper is in response to the article entitled “Identifying potential types of guidance for supporting student inquiry when using virtual and remote labs in science: a literature review” by Zacharia et al. (2015). In their review, Zacharia et
Autor:
R. Steven Turley, Joshua J. Vawdrey, Caleb Michael Plewe, Alexandra Gallion Stapley, David D. Allred, Devin M. Lewis
Publikováno v:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV.
Lithium fluoride (LiF) is difficult to work with because of its hygroscopic nature (it pulls water out of air). The stability limits of LiF thin films and the nature of their failure when exposed to humid air are poorly understood. We show that LiF f
Autor:
Joseph B, Muhlestein, Benjamin D, Smith, Margaret, Miles, Stephanie M, Thomas, Anthony, Willey, David D, Allred, R Steven, Turley
Publikováno v:
Optics express. 27(3)
We report optical constants of e-beam evaporated yttrium oxide Y2O3 thin films as determined from angle-dependent reflectance measurements at wavelengths from 5 to 50 nm. Samples were measured using synchrotron radiation at the Advanced Light Source.
Publikováno v:
Optical Interference Coatings Conference (OIC) 2019.
While no solid barrier layer is transparent below ~103nm, simulations show that ~9.5nm LiF on 8.5nm MgF2 on Al could reflect some hydrogen Lyman lines better than a single fluoride layer does. Experiments are promising.
Publikováno v:
OSA Continuum. 4:879
To maintain high, broad-band reflectance, thin transparent fluoride layers, such as MgF2, are used to protect aluminum mirrors against oxidation. In this study, we present, for the first time, combined X-ray photoelectron spectroscopy (XPS) and spect
Autor:
R. Steven Turley, James P. Hamilton, Yhoshua Wug-Jerez, David D. Allred, J. Gabriel Richardson
Publikováno v:
Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray.
Autor:
Stephanie M. Thomas, David D. Allred, Michael J. Greenburg, Spencer G. Willett, Spencer B. Perry, R. Steven Turley
Publikováno v:
UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts VIII.
Protective layers on aluminum mirror surfaces which can be removed via the use of atomic hydrogen or hydrogen plasmas at the point of use in space may allow an expansion of broad-band mirrors into the EUV. LUVOIR (large, UV-optical-IR telescope) is a
Autor:
Benjamin D. Smith, Anthony Willey, Stephanie M. Thomas, Joseph B. Muhlestein, Margaret Miles, David D. Allred, R. Steven Turley
Publikováno v:
Optics Express. 27:3324
We report optical constants of e-beam evaporated yttrium oxide Y2O3 thin films as determined from angle-dependent reflectance measurements at wavelengths from 5 to 50 nm. Samples were measured using synchrotron radiation at the Advanced Light Source.
Publikováno v:
American Journal of Physics. 77:197-203
A balloon filled with a gas that has a different sound speed than that of air has been used as an acoustic lens. One purpose of the lens is to show refraction of sound waves in an analogy to geometric optics. We discuss the physics of the balloon len