Improved ERO modelling for spectroscopy of physically and chemically assisted eroded beryllium from the JET-ILW

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2016
Major/Subject
Mcode
Degree programme
Language
en
Pages
604-609
Series
Nuclear Materials and Energy, Volume 9
Abstract
Physical and chemical assisted physical sputtering were characterised by the Be. I and Be. II line and BeD band emission in the observation chord measuring the sightline integrated emission in front of the inner beryllium limiter at the torus midplane. The 3D local transport and plasma-surface interaction Monte-Carlo modelling (ERO code [18]) is a key for the interpretation of the observations in the vicinity of the shaped solid Be limiter. The plasma parameter variation (density scan) in limiter regime has provided a useful material for the simulation benchmark. The improved background plasma parameters input, the new analytical expression for particle tracking in the sheath region and implementation of the BeD release into ERO has helped to clarify some deviations between modelling and experiments encountered in the previous studies [4,5]. Reproducing the observations provides additional confidence in our 'ERO-min' fit for the physical sputtering yields for the plasma-wetted areas based on simulated data.
Description
Keywords
Beryllium, Erosion, JET ITER-like wall, Spectroscopy
Other note
Citation
Borodin, D, Brezinsek, S, Borodkina, I, Romazanov, J, Matveev, D, Kirschner, A, Lasa, A, Nordlund, K, Björkas, C, Airila, M, Miettunen, J, Groth, M & Firdaouss, M 2016, ' Improved ERO modelling for spectroscopy of physically and chemically assisted eroded beryllium from the JET-ILW ', Nuclear Materials and Energy, vol. 9, pp. 604-609 . https://doi.org/10.1016/j.nme.2016.08.013