Beryllium global erosion and deposition at JET-ILW simulated with ERO2.0

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2019-01-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
8
331-338
Series
Nuclear Materials and Energy, Volume 18
Abstract
The recently developed Monte-Carlo code ERO2.0 is applied to the modelling of limited and diverted discharges at JET with the ITER-like wall (ILW). The global beryllium (Be) erosion and deposition is simulated and compared to experimental results from passive spectroscopy. For the limiter configuration, it is demonstrated that Be self-sputtering is an important contributor (at least 35%) to the Be erosion. Taking this contribution into account, the ERO2.0 modelling confirms previous evidence that high deuterium (D) surface concentrations of up to ∼ 50% atomic fraction provide a reasonable estimate of Be erosion in plasma-wetted areas. For the divertor configuration, it is shown that drifts can have a high impact on the scrape-off layer plasma flows, which in turn affect global Be transport by entrainment and lead to increased migration into the inner divertor. The modelling of the effective erosion yield for different operational phases (ohmic, L- and H-mode) agrees with experimental values within a factor of two, and confirms that the effective erosion yield decreases with increasing heating power and confinement.
Description
| openaire: EC/H2020/633053/EU//EUROfusion
Keywords
Beryllium, ERO2.0, Erosion, JET ITER-like wall
Other note
Citation
Romazanov, J, Brezinsek, S, Borodin, D, Groth, M, Wiesen, S, Kirschner, A, Huber, A, Widdowson, A, Airila, M, Eksaeva, A, Borodkina, I, Linsmeier, C & JET Contributors 2019, ' Beryllium global erosion and deposition at JET-ILW simulated with ERO2.0 ', Nuclear Materials and Energy, vol. 18, pp. 331-338 . https://doi.org/10.1016/j.nme.2019.01.015