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

JET Contributors

doi:10.1016/j.nme.2019.01.015

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

JET Contributors

Research output: Contribution to journal › Article › peer-review

46 Scopus citations

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.

Original language	English
Pages (from-to)	331-338
Number of pages	8
Journal	Nuclear Materials and Energy
Volume	18
DOIs	https://doi.org/10.1016/j.nme.2019.01.015
State	Published - Jan 2019
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2019 The Authors

Funding

This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 under grant agreement no 633053 . The views and opinions expressed herein do not necessarily reflect those of the European Commission. This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 under grant agreement no 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

Funders	Funder number
Euratom research and training programme 2014–2018
Horizon 2020 Framework Programme
H2020 Euratom	633053

Keywords

Beryllium
ERO2.0
Erosion
JET ITER-like wall

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10.1016/j.nme.2019.01.015

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title = "Beryllium global erosion and deposition at JET-ILW simulated with ERO2.0",

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.",

keywords = "Beryllium, ERO2.0, Erosion, JET ITER-like wall",

author = "{JET Contributors} and J. Romazanov and S. Brezinsek and D. Borodin and M. Groth and S. Wiesen and A. Kirschner and A. Huber and A. Widdowson and M. Airila and A. Eksaeva and I. Borodkina and Ch Linsmeier",

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year = "2019",

month = jan,

doi = "10.1016/j.nme.2019.01.015",

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volume = "18",

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T1 - Beryllium global erosion and deposition at JET-ILW simulated with ERO2.0

AU - JET Contributors

AU - Romazanov, J.

AU - Brezinsek, S.

AU - Borodin, D.

AU - Groth, M.

AU - Wiesen, S.

AU - Kirschner, A.

AU - Huber, A.

AU - Widdowson, A.

AU - Airila, M.

AU - Eksaeva, A.

AU - Borodkina, I.

AU - Linsmeier, Ch

PY - 2019/1

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N2 - 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.

AB - 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.

KW - Beryllium

KW - ERO2.0

KW - Erosion

KW - JET ITER-like wall

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

Abstract

Bibliographical note

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Keywords

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