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

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

  • JET contributors
  • J. Romazanov
  • S. Brezinsek
  • D. Borodin
  • Mathias Groth

  • S. Wiesen
  • A. Kirschner
  • A. Huber
  • A. Widdowson
  • Mauri Airila

  • A. Eksaeva
  • I. Borodkina
  • Ch Linsmeier

Organisaatiot

  • Forschungszentrum Jülich
  • Culham Centre for Fusion Energy
  • VTT Technical Research Centre of Finland
  • Moscow Engineering Physics Institute

Kuvaus

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.

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut331-338
Sivumäärä8
JulkaisuNuclear Materials and Energy
Vuosikerta18
TilaJulkaistu - 1 tammikuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

Lataa tilasto

Ei tietoja saatavilla

ID: 32674954