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Open AccessArticle

Bayesian Determination of Parameters for Plasma-Wall Interactions

Max-Planck-Institut für Plasmaphysik, 85748 Garching, Germany
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Entropy 2019, 21(12), 1175; https://doi.org/10.3390/e21121175
Received: 15 October 2019 / Revised: 18 November 2019 / Accepted: 26 November 2019 / Published: 29 November 2019
Within the Bayesian framework a non-intrusive uncertainty quantification is performed to assess the uncertainty of ion–solid interaction simulations. For this we employ a reduced-order spectral expansion approach which is capable of confining the number of model runs to a feasible size. Moreover, the method facilitates sensitivity examinations regarding to input parameters of the model. It is applied to the ion–solid simulation program SDTrimSP with several uncertain but normally distributed input parameters, i.e., impact angle α , projectile energy E 0 , and surface binding energy E s b . Consequently, the otherwise hardly accessible model parameter E s b can be estimated in combination with recently acquired experimental data.
Keywords: uncertainty quantification; non-intrusive; spectral expansion; plasma-wall interactions; Bayesian analysis uncertainty quantification; non-intrusive; spectral expansion; plasma-wall interactions; Bayesian analysis
MDPI and ACS Style

Preuss, R.; Arredondo, R.; von Toussaint, U. Bayesian Determination of Parameters for Plasma-Wall Interactions. Entropy 2019, 21, 1175.

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