Interpretive modelling of boron transport in the boundary plasma of WEST experiments with the impurity powder dropper

被引：6

作者：

Afonin, K. ^{[1
]}

Gallo, A. ^{[1
]}

Marandet, Y. ^{[2
]}

Moreau, Ph. ^{[1
]}

Bodner, G. ^{[3
]}

Bufferand, H. ^{[1
]}

Ciraolo, G. ^{[1
]}

Desgranges, C. ^{[1
]}

Devynck, P. ^{[1
]}

Diallo, A. ^{[2
]}

Gaspar, J. ^{[4
]}

Guillemaut, C. ^{[1
]}

Guirlet, R. ^{[1
]}

Gunn, J. -P. ^{[1
]}

Fedorczak, N. ^{[1
]}

Loarer, T. ^{[1
]}

Lunsford, R. ^{[3
]}

Manas, P. ^{[1
]}

Nespoli, F. ^{[3
]}

Rivals, N. ^{[2
]}

Tamain, P. ^{[1
]}

Unterberg, E. A. ^{[5
]}

机构：

[1] CEA, IRFM, F-13108 St Paul Les Durance, France

[2] Aix Marseille Univ, CNRS, PIIM, Marseille, France

[3] Princeton Plasma Phys Lab, Princeton, NJ USA

[4] Aix Marseille Univ, CNRS, IUSTI, Marseille, France

[5] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA

来源：

NUCLEAR FUSION | 2023年 / 63卷 / 12期

关键词：

magnetic fusion; plasma-wall interaction; wall conditioning; boundary plasma modelling; impurity powder dropper; WEST;

D O I：

10.1088/1741-4326/ad0597

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Boron (B) powder injection is a potential alternative to glow discharge boronization as a wall conditioning method for tokamaks. This technique is currently being studied in WEST experiments, during which B powder is injected by an Impurity Powder Dropper developed by PPPL. In order to interpret and analyse experimental trends, and to help develop future experiments, a modelling workflow using a boundary plasma simulation (SOLEDGE-EIRENE) and powder ablation simulation (Dust Injection Simulator) was developed and tested. The effect of adding a B neutral source to simulated deuterium + oxygen (D + O) plasmas was compared to experimental data from the WEST C5 campaign, where B powder was injected in a dedicated experiment. While the impact of B injection on radiated power Prad measurements at the upper divertor was similar, there were significant differences in measurements of Prad , outer strike point electron temperature TeOSP and O-II line intensity at the lower divertor between experiment and simulation. This discrepancy suggests that those parameters were affected by phenomena not present in the simulations, with the most likely candidates being reduced D recycling and a reduced O sourcing from the divertor.

引用

页数：13

共 33 条

[31] Line identification of boron and nitrogen emissions in extreme- and vacuum-ultraviolet wavelength ranges in the impurity powder dropping experiments of the Large Helical Device and its application to spectroscopic diagnostics
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[32] Drucker-Prager-Cap modelling of boron carbide powder for coupled electrical-thermal-mechanical finite element simulation of spark plasma sintering
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[33] Modelling of Impurity Transport in the Linear Plasma Devices PISCES-B and Pilot-PSI Using the Monte-Carlo Code ERO (vol 50, pg 432, 2010)
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