EDGE2D-EIRENE predictions of molecular emission in DIII-D high-recycling divertor plasmas

the DIII-D team

doi:10.1016/j.nme.2019.02.035

EDGE2D-EIRENE predictions of molecular emission in DIII-D high-recycling divertor plasmas

the DIII-D team

Advanced Tokamak Physics

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21 Scopus citations

Abstract

The contributions of deuterium molecular emission to the total deuterium radiation was assessed in DIII-D ohmically-confined plasmas in high-recycling divertor conditions. Radial profiles of the deuterium Ly-α line intensity across the low-field side divertor leg were obtained with the recently installed divertor Survey Poor Resolution, Extended Spectrometer [1]. A high-resolution spectrometer was used to measure the poloidal profiles of the deuterium Balmer-α and the deuterium Fulcher-α band intensity in the visible wavelength range. The scrape-off layer plasma and neutral distributions were simulated using the edge fluid EDGE2D-EIRENE [2], and the numerical solutions constrained utilizing Thomson scattering and Langmuir probe measurements at the low-field side midplane and the divertor target plate. The studies show that for these conditions molecular emission plays a negligible role in the total radiative power balance of the low-field side divertor, but molecular processes are important when evaluating deuterium Balmer-α line intensity for code-experiment validation.

Original language	English
Pages (from-to)	211-217
Number of pages	7
Journal	Nuclear Materials and Energy
Volume	19
DOIs	https://doi.org/10.1016/j.nme.2019.02.035
State	Published - May 2019

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 number 633053 . The views and opinions expressed herein do not necessarily reflect those of the European Commission. This work was supported by US DOE under contract nos. DE-FC02-04ER54698 , DE-AC52-07NA27344 , and DE-FG92-07ER54917 . The DIII-D data shown in this paper can be obtained in digital format by following the links at https://fusion.gat.com/global/D3D_DMP . This work was supported by US DOE under contract nos. DE-FC02-04ER54698, DE-AC52-07NA27344, and DE-FG92-07ER54917. The DIII-D data shown in this paper can be obtained in digital format by following the links at https://fusion.gat.com/global/D3D_DMP.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 number 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
U.S. Department of Energy	DE-FG92-07ER54917, DE-FC02-04ER54698, DE-AC52-07NA27344
Horizon 2020 Framework Programme	633053
Universiteit Stellenbosch

Keywords

DIII-D
Deuterium atomic and molecular emission
Divertor edge fluid simulations
EDGE2D-EIRENE
EIRENE
Lyman-Werner and Fulcher band

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.nme.2019.02.035

Cite this

@article{cec6789606cd427f86b2cbf2e78d87ff,

title = "EDGE2D-EIRENE predictions of molecular emission in DIII-D high-recycling divertor plasmas",

abstract = "The contributions of deuterium molecular emission to the total deuterium radiation was assessed in DIII-D ohmically-confined plasmas in high-recycling divertor conditions. Radial profiles of the deuterium Ly-α line intensity across the low-field side divertor leg were obtained with the recently installed divertor Survey Poor Resolution, Extended Spectrometer [1]. A high-resolution spectrometer was used to measure the poloidal profiles of the deuterium Balmer-α and the deuterium Fulcher-α band intensity in the visible wavelength range. The scrape-off layer plasma and neutral distributions were simulated using the edge fluid EDGE2D-EIRENE [2], and the numerical solutions constrained utilizing Thomson scattering and Langmuir probe measurements at the low-field side midplane and the divertor target plate. The studies show that for these conditions molecular emission plays a negligible role in the total radiative power balance of the low-field side divertor, but molecular processes are important when evaluating deuterium Balmer-α line intensity for code-experiment validation.",

keywords = "DIII-D, Deuterium atomic and molecular emission, Divertor edge fluid simulations, EDGE2D-EIRENE, EIRENE, Lyman-Werner and Fulcher band",

author = "{the DIII-D team} and M. Groth and Hollmann, {E. M.} and Jaervinen, {A. E.} and Leonard, {A. W.} and McLean, {A. G.} and Samuell, {C. M.} and D. Reiter and Allen, {S. L.} and P. Boerner and S. Brezinsek and I. Bykov and G. Corrigan and Fenstermacher, {M. E.} and D. Harting and Lasnier, {C. J.} and B. Lomanowski and Makowski, {M. A.} and Shafer, {M. W.} and Wang, {H. Q.} and Watkins, {J. G.} and S. Wiesen and Wilcox, {R. S.}",

note = "Publisher Copyright: {\textcopyright} 2019 The Authors",

year = "2019",

month = may,

doi = "10.1016/j.nme.2019.02.035",

language = "English",

volume = "19",

pages = "211--217",

journal = "Nuclear Materials and Energy",

issn = "2352-1791",

publisher = "Elsevier",

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T1 - EDGE2D-EIRENE predictions of molecular emission in DIII-D high-recycling divertor plasmas

AU - the DIII-D team

AU - Groth, M.

AU - Hollmann, E. M.

AU - Jaervinen, A. E.

AU - Leonard, A. W.

AU - McLean, A. G.

AU - Samuell, C. M.

AU - Reiter, D.

AU - Allen, S. L.

AU - Boerner, P.

AU - Brezinsek, S.

AU - Bykov, I.

AU - Corrigan, G.

AU - Fenstermacher, M. E.

AU - Harting, D.

AU - Lasnier, C. J.

AU - Lomanowski, B.

AU - Makowski, M. A.

AU - Shafer, M. W.

AU - Wang, H. Q.

AU - Watkins, J. G.

AU - Wiesen, S.

AU - Wilcox, R. S.

PY - 2019/5

Y1 - 2019/5

N2 - The contributions of deuterium molecular emission to the total deuterium radiation was assessed in DIII-D ohmically-confined plasmas in high-recycling divertor conditions. Radial profiles of the deuterium Ly-α line intensity across the low-field side divertor leg were obtained with the recently installed divertor Survey Poor Resolution, Extended Spectrometer [1]. A high-resolution spectrometer was used to measure the poloidal profiles of the deuterium Balmer-α and the deuterium Fulcher-α band intensity in the visible wavelength range. The scrape-off layer plasma and neutral distributions were simulated using the edge fluid EDGE2D-EIRENE [2], and the numerical solutions constrained utilizing Thomson scattering and Langmuir probe measurements at the low-field side midplane and the divertor target plate. The studies show that for these conditions molecular emission plays a negligible role in the total radiative power balance of the low-field side divertor, but molecular processes are important when evaluating deuterium Balmer-α line intensity for code-experiment validation.

AB - The contributions of deuterium molecular emission to the total deuterium radiation was assessed in DIII-D ohmically-confined plasmas in high-recycling divertor conditions. Radial profiles of the deuterium Ly-α line intensity across the low-field side divertor leg were obtained with the recently installed divertor Survey Poor Resolution, Extended Spectrometer [1]. A high-resolution spectrometer was used to measure the poloidal profiles of the deuterium Balmer-α and the deuterium Fulcher-α band intensity in the visible wavelength range. The scrape-off layer plasma and neutral distributions were simulated using the edge fluid EDGE2D-EIRENE [2], and the numerical solutions constrained utilizing Thomson scattering and Langmuir probe measurements at the low-field side midplane and the divertor target plate. The studies show that for these conditions molecular emission plays a negligible role in the total radiative power balance of the low-field side divertor, but molecular processes are important when evaluating deuterium Balmer-α line intensity for code-experiment validation.

KW - DIII-D

KW - Deuterium atomic and molecular emission

KW - Divertor edge fluid simulations

KW - EDGE2D-EIRENE

KW - EIRENE

KW - Lyman-Werner and Fulcher band

UR - http://www.scopus.com/inward/record.url?scp=85062352279&partnerID=8YFLogxK

U2 - 10.1016/j.nme.2019.02.035

DO - 10.1016/j.nme.2019.02.035

M3 - Article

AN - SCOPUS:85062352279

SN - 2352-1791

VL - 19

SP - 211

EP - 217

JO - Nuclear Materials and Energy

JF - Nuclear Materials and Energy

ER -

EDGE2D-EIRENE predictions of molecular emission in DIII-D high-recycling divertor plasmas

Abstract

Funding

Keywords

UN SDGs

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