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

Romazanov, J.; Brezinsek, S.; Borodin, D.; Groth, M.; Wiesen, S.; Kirschner, A.; Huber, A.; Widdowson, A.; Airila, M.; Eksaeva, A.; Borodkina, I.; Linsmeier, Ch; Abduallev, S.; Abhangi, M.; Abreu, P.; Afzal, M.; Aggarwal, K. M.; Ahlgren, T.; Ahn, J. H.; Aho-Mantila, L.; ... mehr

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.

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Originalveröffentlichung
DOI: 10.1016/j.nme.2019.01.015
Scopus
Zitationen: 6
Web of Science
Zitationen: 6
Zugehörige Institution(en) am KIT Institut für Technische Physik (ITEP)
Institut für Angewandte Thermofluidik (IATF)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 01.2019
Sprache Englisch
Identifikator ISSN: 2352-1791
KITopen-ID: 1000119912
Erschienen in Nuclear materials and energy
Band 18
Seiten 331-338
Bemerkung zur Veröffentlichung Kollaboration: JET Contributors
Nachgewiesen in Scopus
Web of Science
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