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research article

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

Romazanov, J.
•
Brezinsek, S.
•
Borodin, D.
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January 1, 2019
Nuclear Materials And Energy

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 similar 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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Type
research article
DOI
10.1016/j.nme.2019.01.015
Web of Science ID

WOS:000460107500056

Author(s)
Romazanov, J.
Brezinsek, S.
Borodin, D.
Groth, M.
Wiesen, S.
Kirschner, A.
Huber, A.
Widdowson, A.
Airila, M.
Eksaeva, A.
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Date Issued

2019-01-01

Published in
Nuclear Materials And Energy
Volume

18

Start page

331

End page

338

Subjects

Nuclear Science & Technology

•

beryllium

•

erosion

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er02.0

•

jet iter-like wall

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plasma edge

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transport

Note

This is an open access article under the terms of the Creative Commons Attribution License

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SPC  
Available on Infoscience
October 20, 2019
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/162135
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