Low earth orbit environmental effects on osmium and related optical thin-film coatings

Optical constants of magnetron sputtered Pt thin films with improved accuracy in the N- and O-electronic shell absorption regions

“…For example, 1% uncertainty in the density of the Pt films in the photon energy region 25-778 eV would produce 0.36 electrons difference in N eff in Eq. (5). Furthermore, it should be noted that Eq.…”

“…1 Pt coatings exhibit high reflectance at grazing and normal incidence angles at EUV/ soft x-ray photon energies 2 and have therefore been applied in synchrotron mirrors 3,4 and considered as mirror coatings for space-borne solar physics and astronomy telescopes. [5][6][7][8][9] The photon energies of the above applications include the Pt N-and O-electronic shell absorption edge regions, which extend from 50 eV to 800 eV. Accurate knowledge of the refractive index of Pt in this photon energy region is not only essential for the design and modeling of EUV/x-ray optics containing Pt, but for atomic physics and materials science research in general, especially considering the importance of Pt in catalysis and nanotechnology.…”

Effects of multiple contaminant components on spectral performance of reflective mirrors in resonance ionization spectroscopy

“…The optical constants of the Nd film of 20 nm thickness and Nd-oxide film of 100 nm thickness are analyzed using ellipsometry shifts, and the results are presented in Figs. 4. The refractive index of Nd-oxide film remains relatively constant across wavelengths, with a range of 1.1~1.2 at 560~660 nm.…”

“…Currently, the research of OCC is mainly concentrated on the frontier applications, such as the space environment, laser confinement fusion (ICF), photolithography, missile guidance, and other important domains in scientific research, industry, and military. Between 1983 and 2013, extensive evidence from Long Duration Exposure Facility Experiment and Materials International Space Station Experiment demonstrated that contamination from thermal decomposition and outgassing of polymeric organic materials employed in spacecrafts could impact the reflectance and transmittance of optical surfaces, potentially causing instruments to malfunction or fail [4][5][6][7][8] [12][13][14][15][16].…”

Design and Fabrication of Soft X ray Suppermirrors

“…To resist space high-energy particles, we put metal layer as the nal one near to air. It was reported that Ir and Pt have good stability when exposed to space environment, especially atomic oxygen[9][10][11]. shows theoretical re ectance curves of Pt/C supermirrors designed by block method at 1.0, 1.4, 1.7 degrees.…”