Study of non-axisymmetric divertor footprints using 2-D IR and visible cameras and a 3-D heat conduction solver in NSTX

J. W. Ahn; K. F. Gan; F. Scotti; J. D. Lore; R. Maingi; J. M. Canik; T. K. Gray; A. G. McLean; A. L. Roquemore; V. A. Soukhanovskii

doi:10.1016/j.jnucmat.2013.01.058

Study of non-axisymmetric divertor footprints using 2-D IR and visible cameras and a 3-D heat conduction solver in NSTX

J. W. Ahn, K. F. Gan, F. Scotti, J. D. Lore, R. Maingi, J. M. Canik, T. K. Gray, A. G. McLean, A. L. Roquemore, V. A. Soukhanovskii

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

4 Scopus citations

Abstract

Toroidally non-axisymmetric divertor profiles during the 3-D field application and for ELMs are studied with simultaneous observation by a new wide angle visible camera and a high speed IR camera. A newly implemented 3-D heat conduction code, TACO, is used to obtain divertor heat flux. The wide angle camera data confirmed the previously reported result on the validity of vacuum field line tracing on the prediction of split strike point pattern by 3-D fields as well as the phase locking of ELM heat flux to the 3-D fields. TACO calculates the 2-D heat flux distribution allowing assessment of toroidal asymmetry of peak heat flux and heat flux width. The degree of asymmetry (e _DA) is defined to quantify the asymmetric heat deposition on the divertor surface and is found to have a strong positive dependence on peak heat flux.

Original language	English
Pages (from-to)	S317-S320
Journal	Journal of Nuclear Materials
Volume	438
Issue number	SUPPL
DOIs	https://doi.org/10.1016/j.jnucmat.2013.01.058
State	Published - 2013

Funding

This work was supported by the US Department of Energy, contract numbers DE-AC05-000R22725, DE-AC52-07NA27344, and DE-AC02-09CH11466.

Funders	Funder number
US Department of Energy	DE-AC05-000R22725, DE-AC02-09CH11466, DE-AC52-07NA27344

UN SDGs

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

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10.1016/j.jnucmat.2013.01.058

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Ahn, J. W., Gan, K. F., Scotti, F., Lore, J. D., Maingi, R., Canik, J. M., Gray, T. K., McLean, A. G., Roquemore, A. L., & Soukhanovskii, V. A. (2013). Study of non-axisymmetric divertor footprints using 2-D IR and visible cameras and a 3-D heat conduction solver in NSTX. Journal of Nuclear Materials, 438(SUPPL), S317-S320. https://doi.org/10.1016/j.jnucmat.2013.01.058

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title = "Study of non-axisymmetric divertor footprints using 2-D IR and visible cameras and a 3-D heat conduction solver in NSTX",

abstract = "Toroidally non-axisymmetric divertor profiles during the 3-D field application and for ELMs are studied with simultaneous observation by a new wide angle visible camera and a high speed IR camera. A newly implemented 3-D heat conduction code, TACO, is used to obtain divertor heat flux. The wide angle camera data confirmed the previously reported result on the validity of vacuum field line tracing on the prediction of split strike point pattern by 3-D fields as well as the phase locking of ELM heat flux to the 3-D fields. TACO calculates the 2-D heat flux distribution allowing assessment of toroidal asymmetry of peak heat flux and heat flux width. The degree of asymmetry (e DA) is defined to quantify the asymmetric heat deposition on the divertor surface and is found to have a strong positive dependence on peak heat flux.",

author = "Ahn, {J. W.} and Gan, {K. F.} and F. Scotti and Lore, {J. D.} and R. Maingi and Canik, {J. M.} and Gray, {T. K.} and McLean, {A. G.} and Roquemore, {A. L.} and Soukhanovskii, {V. A.}",

year = "2013",

doi = "10.1016/j.jnucmat.2013.01.058",

language = "English",

volume = "438",

pages = "S317--S320",

journal = "Journal of Nuclear Materials",

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AU - Ahn, J. W.

AU - Gan, K. F.

AU - Scotti, F.

AU - Lore, J. D.

AU - Maingi, R.

AU - Canik, J. M.

AU - Gray, T. K.

AU - McLean, A. G.

AU - Roquemore, A. L.

AU - Soukhanovskii, V. A.

PY - 2013

Y1 - 2013

N2 - Toroidally non-axisymmetric divertor profiles during the 3-D field application and for ELMs are studied with simultaneous observation by a new wide angle visible camera and a high speed IR camera. A newly implemented 3-D heat conduction code, TACO, is used to obtain divertor heat flux. The wide angle camera data confirmed the previously reported result on the validity of vacuum field line tracing on the prediction of split strike point pattern by 3-D fields as well as the phase locking of ELM heat flux to the 3-D fields. TACO calculates the 2-D heat flux distribution allowing assessment of toroidal asymmetry of peak heat flux and heat flux width. The degree of asymmetry (e DA) is defined to quantify the asymmetric heat deposition on the divertor surface and is found to have a strong positive dependence on peak heat flux.

AB - Toroidally non-axisymmetric divertor profiles during the 3-D field application and for ELMs are studied with simultaneous observation by a new wide angle visible camera and a high speed IR camera. A newly implemented 3-D heat conduction code, TACO, is used to obtain divertor heat flux. The wide angle camera data confirmed the previously reported result on the validity of vacuum field line tracing on the prediction of split strike point pattern by 3-D fields as well as the phase locking of ELM heat flux to the 3-D fields. TACO calculates the 2-D heat flux distribution allowing assessment of toroidal asymmetry of peak heat flux and heat flux width. The degree of asymmetry (e DA) is defined to quantify the asymmetric heat deposition on the divertor surface and is found to have a strong positive dependence on peak heat flux.

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DO - 10.1016/j.jnucmat.2013.01.058

M3 - Article

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SN - 0022-3115

VL - 438

SP - S317-S320

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - SUPPL

ER -

Study of non-axisymmetric divertor footprints using 2-D IR and visible cameras and a 3-D heat conduction solver in NSTX

Abstract

Funding

UN SDGs

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