Dirac $R$-matrix calculations for the electron-impact excitation of neutral tungsten providing noninvasive diagnostics for magnetic confinement fusion

Smyth, R. T.; Ballance, C. P.; Ramsbottom, C. A.; Johnson, C. A.; Ennis, D. A.; Loch, S. D.

doi:10.1103/physreva.97.052705

Title: Dirac $$R$$-matrix calculations for the electron-impact excitation of neutral tungsten providing noninvasive diagnostics for magnetic confinement fusion

Journal Article · Mon May 07 00:00:00 EDT 2018 · Physical Review A

DOI:https://doi.org/10.1103/physreva.97.052705· OSTI ID:1540683

Smyth, R. T. ^[1]; Ballance, C. P. ^[1]; Ramsbottom, C. A. ^[1]; Johnson, C. A. ^[2]; Ennis, D. A. ^[2]; Loch, S. D. ^[2]

Queen's Univ., Belfast (United Kingdom)
Auburn Univ., AL (United States)

Neutral tungsten is the primary candidate as a wall material in the divertor region of the International Thermonuclear Experimental Reactor (ITER). The efficient operation of ITER depends heavily on precise atomic physics calculations for the determination of reliable erosion diagnostics, helping to characterize the influx of tungsten impurities into the core plasma. The following paper presents detailed calculations of the atomic structure of neutral tungsten using the multiconfigurational Dirac-Fock method, drawing comparisons with experimental measurements where available, and includes a critical assessment of existing atomic structure data. We investigate the electron-impact excitation of neutral tungsten using the Dirac R-matrix method, and by employing collisional-radiative models, we benchmark our results with recent Compact Toroidal Hybrid measurements. The resulting comparisons highlight alternative diagnostic lines to the widely used 400.88-nm line.

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Research Organization:: Auburn Univ., AL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES); STFC

Grant/Contract Number:: FG02-00ER54610; SC0015877; ST/P000312/1

OSTI ID:: 1540683

Alternate ID(s):: OSTI ID: 1436200

Journal Information:: Physical Review A, Vol. 97, Issue 5; ISSN 2469-9926

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 14 works

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Cited By (5)

Advances in neutral tungsten ultraviolet spectroscopy for the potential benefit to gross erosion diagnosis Johnson, C. A.; Ennis, D. A.; Loch, S. D. Plasma Physics and Controlled Fusion, Vol. 61, Issue 9 https://doi.org/10.1088/1361-6587/ab2b25	journal	August 2019
Reduced model of high-Z impurity redeposition and erosion in tokamak divertor and its application to DIII-D experiments Guterl, J.; Wampler, W. R.; Rudakov, D. Plasma Physics and Controlled Fusion, Vol. 61, Issue 12 https://doi.org/10.1088/1361-6587/ab5144	journal	November 2019
Benchmarking Current Capabilities for the Generation of Excitation and Photoionisation Atomic Data Ramsbottom, Catherine; Ballance, Connor; Smyth, Ryan Galaxies, Vol. 6, Issue 3 https://doi.org/10.3390/galaxies6030090	journal	August 2018
Towards the Provision of Accurate Atomic Data for Neutral Iron Conroy, Andrew; Ramsbottom, Catherine; Ballance, Connor Galaxies, Vol. 6, Issue 3 https://doi.org/10.3390/galaxies6030091	journal	August 2018
Advances in neutral tungsten ultraviolet spectroscopy for the potential benefit to gross erosion diagnosis Johnson, C. A.; Ennis, D. A.; Loch, S. D. arXiv https://doi.org/10.48550/arxiv.1912.07723	text	January 2019

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