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Proceedings Paper

Risk analysis of laser elements for complex characterization of damages by space radiation
Author(s): Mikhailo Brodyn; Vladimir Bezrodnyi; Anatoliy Negriyko; Vitaliy Yatsenko
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Paper Abstract

This report concentrates on dynamic probabilistic risk analysis of optical elements for complex characterization of damages using physical model of solid state lasers and predictable level of ionizing radiation and space weather. The following main subjects will be covered by our report: (a) a solid-state laser model; (b) mathematical models for dynamic probabilistic risk assessment; and (c) software for modeling and prediction of ionizing radiation. A probabilistic risk assessment method for solid-state lasers is presented with consideration of some deterministic and stochastic factors. Probabilistic risk assessment is a comprehensive, structured, and logical analysis method aimed at identifying and assessing risks in solid-state lasers for the purpose of cost-effectively improving their safety and performance. This method is based on the Conditional Value-at-Risk measure (CVaR) and the expected loss exceeding Value-at-Risk (VaR). We propose a new dynamical-information approach for radiation damage risk assessment of laser elements by cosmic radiation. Our approach includes the following steps: (a)laser modeling, modeling of ionizing radiation influences on laser elements, (b) probabilistic risk assessment methods, and (c) risk minimization. For computer simulation of damage processes at microscopic and macroscopic levels the following methods are used: (a) statistical; (b) dynamical; (c) optimization; (d) acceleration modeling, and (e) mathematical modeling of laser functioning. Mathematical models of space ionizing radiation influence on laser elements were developed for risk assessment in laser safety analysis. This is a so-called 'black box' or 'input-output' model, which seeks only to reproduce the behaviour of the system's output in response to changes in its inputs. The model inputs are radiation influences on laser systems and output parameters are dynamical characteristics of the solid laser.

Paper Details

Date Published: 18 May 2009
PDF: 9 pages
Proc. SPIE 7361, Damage to VUV, EUV, and X-Ray Optics II, 73610W (18 May 2009); doi: 10.1117/12.820489
Show Author Affiliations
Mikhailo Brodyn, Institute of Space Research (Ukraine)
Vladimir Bezrodnyi, Institute of Space Research (Ukraine)
Anatoliy Negriyko, Institute of Space Research (Ukraine)
Vitaliy Yatsenko, Institute of Physics (Ukraine)

Published in SPIE Proceedings Vol. 7361:
Damage to VUV, EUV, and X-Ray Optics II
Libor Juha; Saša Bajt; Ryszard Sobierajski, Editor(s)

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