Boron transport simulation using the ERO2.0 code for real-time wall conditioning in the large helical device

M. Shoji; G. Kawamura; J. Romazanov; A. Kirschner; A. Eksaeva; D. Borodin; S. Masuzaki; S. Brezinsek

doi:10.1016/j.nme.2020.100853

Boron transport simulation using the ERO2.0 code for real-time wall conditioning in the large helical device

M. Shoji
, G. Kawamura
, J. Romazanov
, A. Kirschner
, A. Eksaeva
, D. Borodin
, S. Masuzaki
, S. Brezinsek

National Institutes of Natural Sciences - National Institute for Fusion Science
The Graduate University for Advanced Studies
Jülich Research Centre

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

8 Scopus citations

Abstract

The three-dimensional Monte-Carlo impurity transport and plasma surface interaction code ERO2.0 is applied to a full-torus model for the Large Helical Device (LHD). In order to find an optimum experimental condition for effective real-time wall conditioning (boronization) using an Impurity Powder Dropper (IPD), the toroidal and poloidal distribution of the boron flux density on the divertor components and the vacuum vessel are surveyed in various experimental conditions. The source profile of the neutral boron atoms originated from boron powders supplied from the IPD is calculated using the DUSTT code in background plasmas provided by the EMC3-EIRENE code. The simulations using ERO2.0 predict that higher plasma density operation is inappropriate for the effective wall conditioning because of the toroidally localized boron flux density in a closed helical divertor region. The ERO2.0 simulations have successfully revealed an optimum experimental condition for the wall conditioning with the toroidally uniform boron flux density in the closed helical divertor region.

Original language	English
Article number	100853
Journal	Nuclear Materials and Energy
Volume	25
DOIs	https://doi.org/10.1016/j.nme.2020.100853
State	Published - Dec 2020
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2020 The Author(s)

Funding

This work is performed under the auspices of the NIFS Collaboration Research program (NIFS12KNXN236). The author would like to thank Y. Feng for permission to use the EMC3-EIRENE. He is also grateful to Profs. S. I. Krasheninnikov and Y. Tanaka, and Dr. R. D. Smirnov for providing the DUSTT, and for the support for using the code in our computational environment. Furthermore, he appreciates the computational resources of the LHD numerical analysis server and the plasma simulator in NIFS. This work is also supported by JSPS KAKENHI Grant Numbers 18H01203 , 16H04619 , and 16K18340 .

Funders	Funder number
Japan Society for the Promotion of Science	16K18340, 16H04619, 18H01203

Keywords

Boronization
DUSTT
EMC3-EIRENE
ERO2.0
Impurity powder dropper
LHD

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10.1016/j.nme.2020.100853

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title = "Boron transport simulation using the ERO2.0 code for real-time wall conditioning in the large helical device",

abstract = "The three-dimensional Monte-Carlo impurity transport and plasma surface interaction code ERO2.0 is applied to a full-torus model for the Large Helical Device (LHD). In order to find an optimum experimental condition for effective real-time wall conditioning (boronization) using an Impurity Powder Dropper (IPD), the toroidal and poloidal distribution of the boron flux density on the divertor components and the vacuum vessel are surveyed in various experimental conditions. The source profile of the neutral boron atoms originated from boron powders supplied from the IPD is calculated using the DUSTT code in background plasmas provided by the EMC3-EIRENE code. The simulations using ERO2.0 predict that higher plasma density operation is inappropriate for the effective wall conditioning because of the toroidally localized boron flux density in a closed helical divertor region. The ERO2.0 simulations have successfully revealed an optimum experimental condition for the wall conditioning with the toroidally uniform boron flux density in the closed helical divertor region.",

keywords = "Boronization, DUSTT, EMC3-EIRENE, ERO2.0, Impurity powder dropper, LHD",

author = "M. Shoji and G. Kawamura and J. Romazanov and A. Kirschner and A. Eksaeva and D. Borodin and S. Masuzaki and S. Brezinsek",

note = "Publisher Copyright: {\textcopyright} 2020 The Author(s)",

year = "2020",

month = dec,

doi = "10.1016/j.nme.2020.100853",

language = "אנגלית",

volume = "25",

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T1 - Boron transport simulation using the ERO2.0 code for real-time wall conditioning in the large helical device

AU - Shoji, M.

AU - Kawamura, G.

AU - Romazanov, J.

AU - Kirschner, A.

AU - Eksaeva, A.

AU - Borodin, D.

AU - Masuzaki, S.

AU - Brezinsek, S.

PY - 2020/12

Y1 - 2020/12

N2 - The three-dimensional Monte-Carlo impurity transport and plasma surface interaction code ERO2.0 is applied to a full-torus model for the Large Helical Device (LHD). In order to find an optimum experimental condition for effective real-time wall conditioning (boronization) using an Impurity Powder Dropper (IPD), the toroidal and poloidal distribution of the boron flux density on the divertor components and the vacuum vessel are surveyed in various experimental conditions. The source profile of the neutral boron atoms originated from boron powders supplied from the IPD is calculated using the DUSTT code in background plasmas provided by the EMC3-EIRENE code. The simulations using ERO2.0 predict that higher plasma density operation is inappropriate for the effective wall conditioning because of the toroidally localized boron flux density in a closed helical divertor region. The ERO2.0 simulations have successfully revealed an optimum experimental condition for the wall conditioning with the toroidally uniform boron flux density in the closed helical divertor region.

AB - The three-dimensional Monte-Carlo impurity transport and plasma surface interaction code ERO2.0 is applied to a full-torus model for the Large Helical Device (LHD). In order to find an optimum experimental condition for effective real-time wall conditioning (boronization) using an Impurity Powder Dropper (IPD), the toroidal and poloidal distribution of the boron flux density on the divertor components and the vacuum vessel are surveyed in various experimental conditions. The source profile of the neutral boron atoms originated from boron powders supplied from the IPD is calculated using the DUSTT code in background plasmas provided by the EMC3-EIRENE code. The simulations using ERO2.0 predict that higher plasma density operation is inappropriate for the effective wall conditioning because of the toroidally localized boron flux density in a closed helical divertor region. The ERO2.0 simulations have successfully revealed an optimum experimental condition for the wall conditioning with the toroidally uniform boron flux density in the closed helical divertor region.

KW - Boronization

KW - DUSTT

KW - EMC3-EIRENE

KW - ERO2.0

KW - Impurity powder dropper

KW - LHD

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SN - 2352-1791

VL - 25

JO - Nuclear Materials and Energy

JF - Nuclear Materials and Energy

M1 - 100853

ER -

Boron transport simulation using the ERO2.0 code for real-time wall conditioning in the large helical device

Abstract

Bibliographical note

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Keywords

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