Kinetics of Changes in Optical Properties upon Electron Irradiation of CaSiO3 Powder Modified with CeO2 Nanoparticles

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Abstract

We studied the kinetics of changes in the diffuse reflectance spectra and the integral absorption coefficient of solar radiation of the original CaSiO3 powder with micron-sized grains and modified with CeO2 nanoparticles at their optimal concentration of 3 wt% under electron irradiation (energy Е = 30 keV, fluence Φ = (1 - 7)×1016 cm-2) and the possibility of recording these properties in a vacuum at the irradiation site (in situ). Modification was found to lead to an increase in radiation resistance from 2.39 to 2.89 times depending on the electron fluence. The modification efficiency increases with increasing electron fluence during irradiation. The obtained results can be used to develop new radiation-resistant thermal control coatings of the "optical solar reflectors" class for spacecraft.

About the authors

M. M Mikhailov

Tomsk State University of Control Systems and Radioelectronics

Email: membrana2010@mail.ru
Tomsk, Russia

D. S Fedosov

Tomsk State University of Control Systems and Radioelectronics

Email: dmitrii.s.fedosov@tusur.ru
Tomsk, Russia

A. N Lapin

Tomsk State University of Control Systems and Radioelectronics

Tomsk, Russia

S. A Yuryev

Tomsk State University of Control Systems and Radioelectronics

Tomsk, Russia

V. A Goronchko

Tomsk State University of Control Systems and Radioelectronics

Tomsk, Russia

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