Divertor heat flux reduction by D2 injection in DIII-D

T. W. Petrie; D. Buchenauer; D. N. Hill; C. Klepper; S. Allen; R. Campbell; A. Futch; R. J. Groebner; A. Leonard; S. Lippmann; M. Ali Mahdavi; M. Rensink; P. West

doi:10.1016/S0022-3115(06)80155-8

Divertor heat flux reduction by D₂ injection in DIII-D

T. W. Petrie, D. Buchenauer, D. N. Hill, C. Klepper, S. Allen, R. Campbell, A. Futch, R. J. Groebner, A. Leonard, S. Lippmann, M. Ali Mahdavi, M. Rensink, P. West

Diagnostics and Control

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

110 Scopus citations

Abstract

D₂ gas injected into ELMing H-mode discharges in DIII-D reduced the total integrated heat flux to the divertor ∼2× and the peak heat flux ∼5×, with only modest degradation to plasma stored energy. Steady gas injection without particle pumping results in eventual degradation in stored energy. The initial reduction in peak heat flux at the divertor tiles may be primarily due to the increase in radiated power from the X-point/divertor region. The eventual formation of a high density region near the X-point appears to play a role in momentum (and energy) transfer from the flux surfaces near the outboard strike point to flux surfaces farther out into the scrape-off. This may also contribute to further reduction in peak heat flux.

Original language	English
Pages (from-to)	848-853
Number of pages	6
Journal	Journal of Nuclear Materials
Volume	196-198
Issue number	C
DOIs	https://doi.org/10.1016/S0022-3115(06)80155-8
State	Published - Dec 1 1992

Funding

This work was sponsored by the US Department of Energy under contract no. DE-AC03-89ER51114.

Funders	Funder number
U.S. Department of Energy	DE-AC03-89ER51114

UN SDGs

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

Access to Document

10.1016/S0022-3115(06)80155-8

Cite this

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title = "Divertor heat flux reduction by D2 injection in DIII-D",

abstract = "D2 gas injected into ELMing H-mode discharges in DIII-D reduced the total integrated heat flux to the divertor ∼2× and the peak heat flux ∼5×, with only modest degradation to plasma stored energy. Steady gas injection without particle pumping results in eventual degradation in stored energy. The initial reduction in peak heat flux at the divertor tiles may be primarily due to the increase in radiated power from the X-point/divertor region. The eventual formation of a high density region near the X-point appears to play a role in momentum (and energy) transfer from the flux surfaces near the outboard strike point to flux surfaces farther out into the scrape-off. This may also contribute to further reduction in peak heat flux.",

author = "Petrie, {T. W.} and D. Buchenauer and Hill, {D. N.} and C. Klepper and S. Allen and R. Campbell and A. Futch and Groebner, {R. J.} and A. Leonard and S. Lippmann and {Ali Mahdavi}, M. and M. Rensink and P. West",

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doi = "10.1016/S0022-3115(06)80155-8",

language = "English",

volume = "196-198",

pages = "848--853",

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TY - JOUR

T1 - Divertor heat flux reduction by D2 injection in DIII-D

AU - Petrie, T. W.

AU - Buchenauer, D.

AU - Hill, D. N.

AU - Klepper, C.

AU - Allen, S.

AU - Campbell, R.

AU - Futch, A.

AU - Groebner, R. J.

AU - Leonard, A.

AU - Lippmann, S.

AU - Ali Mahdavi, M.

AU - Rensink, M.

AU - West, P.

PY - 1992/12/1

Y1 - 1992/12/1

N2 - D2 gas injected into ELMing H-mode discharges in DIII-D reduced the total integrated heat flux to the divertor ∼2× and the peak heat flux ∼5×, with only modest degradation to plasma stored energy. Steady gas injection without particle pumping results in eventual degradation in stored energy. The initial reduction in peak heat flux at the divertor tiles may be primarily due to the increase in radiated power from the X-point/divertor region. The eventual formation of a high density region near the X-point appears to play a role in momentum (and energy) transfer from the flux surfaces near the outboard strike point to flux surfaces farther out into the scrape-off. This may also contribute to further reduction in peak heat flux.

AB - D2 gas injected into ELMing H-mode discharges in DIII-D reduced the total integrated heat flux to the divertor ∼2× and the peak heat flux ∼5×, with only modest degradation to plasma stored energy. Steady gas injection without particle pumping results in eventual degradation in stored energy. The initial reduction in peak heat flux at the divertor tiles may be primarily due to the increase in radiated power from the X-point/divertor region. The eventual formation of a high density region near the X-point appears to play a role in momentum (and energy) transfer from the flux surfaces near the outboard strike point to flux surfaces farther out into the scrape-off. This may also contribute to further reduction in peak heat flux.

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