Long-duration orbital effects on optical coating materials

Herzig, H.; Toft, Albert R.; Fleetwood, Charles M.

doi:10.1364/ao.32.001798

Cited by 24 publications

(12 citation statements)

References 7 publications

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“…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.…”

Section: Introductionmentioning

confidence: 99%

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

Soufli

Delmotte

Meyer-Ilse

et al. 2019

Journal of Applied Physics

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Section: Introductionmentioning

confidence: 99%

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

Soufli

Delmotte

Meyer-Ilse

et al. 2019

Journal of Applied Physics

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“…Herzig et al [50] also exposed transition-metal mirrors of Au, Ir, Os, and Pt to LEO environment, close to the ram direction. As with the aforementioned experiments, Os was fully removed, whereas Pt and Ir behaved relatively well after exposure.…”

Section: Atomic Oxygenmentioning

confidence: 99%

Mirrors for Space Telescopes: Degradation Issues

Garoli¹,

Marcos²,

Larruquert³

et al. 2020

Preprint

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Mirrors are a subset of optical components essential for the success of current and future space missions. Most of the telescopes for space programs ranging from Earth Observation to Astrophysics and covering the whole electromagnetic spectrum from X-rays to Far-Infrared are based on reflective optics. Mirrors operate in diverse and harsh environments that range from Low-Earth Orbit, to interplanetary orbits and the deep space. The operational life of space observatories spans from minutes (sounding rockets) to decades (large observatories), and the performance of the mirrors within the mission lifetime is susceptible to degrade, which results in a drop of the instrument throughput, which in turn affects the scientific return. Therefore, the knowledge of potential degradation mechanisms, how they affect mirror performance, and how to prevent them is of paramount importance to ensure the long-term success of space telescopes. In this review we report an overview on current mirror technology for space missions with a focus on the importance of degradation and radiation resistance of the coating materials. A special attention will be given to degradation effects on mirrors for the far and extreme UV as in these ranges the degradation is enhanced by the strong absorption of most contaminants.

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“…It was expected that the aluminum oxide layer would stabilize quickly, especially with the optics maintained in dry N 2 purge until launch (Bartl and Baranek 2004;Herzig et al 1993). Nevertheless, a grating monitoring program was established using the on-board Pt/Ne wavelength calibration lamps.…”

Section: Nuv Spectroscopic Performancementioning

confidence: 99%

The Cosmic Origins Spectrograph: on-orbit instrument performance

Osterman

Green

Froning

et al. 2011

Astrophys Space Sci

106

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The Cosmic Origins Spectrograph (COS) was installed in the Hubble Space Telescope in May, 2009 as part of Servicing Mission 4 to provide high sensitivity, medium and low resolution spectroscopy at far-and nearultraviolet wavelengths (FUV, NUV). COS is the most sensitive FUV/NUV spectrograph flown to date, spanning the wavelength range from 900 Å to 3200 Å with peak effective area approaching 3000 cm 2 . This paper describes instrument design, the results of the Servicing Mission Orbital Verifi-

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Long-duration orbital effects on optical coating materials

Cited by 24 publications

References 7 publications

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

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

Mirrors for Space Telescopes: Degradation Issues

The Cosmic Origins Spectrograph: on-orbit instrument performance

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