Radiative divertor plasmas with convection in DIII-D

A. W. Leonard; G. D. Porter; R. D. Wood; S. L. Allen; J. Boedo; N. H. Brooks; T. E. Evans; M. E. Fenstermacher; D. N. Hill; R. C. Isler; C. J. Lasnier; R. D. Lehmer; M. A. Mahdavi; R. Maingi; R. A. Moyer; T. W. Petrie; M. J. Schaffer; M. R. Wade; J. G. Watkins; W. P. West; D. G. Whyte

doi:10.1063/1.872842

Radiative divertor plasmas with convection in DIII-D

A. W. Leonard, G. D. Porter, R. D. Wood, S. L. Allen, J. Boedo, N. H. Brooks, T. E. Evans, M. E. Fenstermacher, D. N. Hill, R. C. Isler, C. J. Lasnier, R. D. Lehmer, M. A. Mahdavi, R. Maingi, R. A. Moyer, T. W. Petrie, M. J. Schaffer, M. R. Wade, J. G. Watkins, W. P. WestD. G. Whyte

Fusion and Fission Energy and Science Di

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Abstract

The radiation of divertor heat flux on DIII-D [J. Luxon et al, in Proceedings of the 11th International Conference on Plasma Physics and Controlled Nuclear Fusion (International Atomic Energy Agency, Vienna, 1987), p. 159] is shown to greatly exceed the limits imposed by assumptions of energy transport dominated by electron thermal conduction parallel to the magnetic field. Approximately 90% of the power flowing into the divertor is dissipated through low-Z radiation and plasma recombination. The dissipation is made possible by an extended region of low electron temperature in the divertor. A one-dimensional analysis of the parallel heat flux finds that the electron temperature profile is incompatible with conduction-dominated parallel transport. Plasma flow at up to the ion acoustic speed, produced by upstream ionization, can account for the parallel heat flux. Modeling with the two-dimensional fluid code UEDGE [T. Rognlien, J. L. Milovich, M. E. Rensink, and G. D. Porter, J. Nucl. Mater. 196-198, 347 (1992)] has reproduced many of the observed experimental features.

Original language	English
Pages (from-to)	1736-1743
Number of pages	8
Journal	Physics of Plasmas
Volume	5
Issue number	5 PART 1
DOIs	https://doi.org/10.1063/1.872842
State	Published - May 1998

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Leonard, A. W., Porter, G. D., Wood, R. D., Allen, S. L., Boedo, J., Brooks, N. H., Evans, T. E., Fenstermacher, M. E., Hill, D. N., Isler, R. C., Lasnier, C. J., Lehmer, R. D., Mahdavi, M. A., Maingi, R., Moyer, R. A., Petrie, T. W., Schaffer, M. J., Wade, M. R., Watkins, J. G., ... Whyte, D. G. (1998). Radiative divertor plasmas with convection in DIII-D. Physics of Plasmas, 5(5 PART 1), 1736-1743. https://doi.org/10.1063/1.872842

@article{13ae254f6fb6473bb83c465410457011,

title = "Radiative divertor plasmas with convection in DIII-D",

abstract = "The radiation of divertor heat flux on DIII-D [J. Luxon et al, in Proceedings of the 11th International Conference on Plasma Physics and Controlled Nuclear Fusion (International Atomic Energy Agency, Vienna, 1987), p. 159] is shown to greatly exceed the limits imposed by assumptions of energy transport dominated by electron thermal conduction parallel to the magnetic field. Approximately 90\% of the power flowing into the divertor is dissipated through low-Z radiation and plasma recombination. The dissipation is made possible by an extended region of low electron temperature in the divertor. A one-dimensional analysis of the parallel heat flux finds that the electron temperature profile is incompatible with conduction-dominated parallel transport. Plasma flow at up to the ion acoustic speed, produced by upstream ionization, can account for the parallel heat flux. Modeling with the two-dimensional fluid code UEDGE [T. Rognlien, J. L. Milovich, M. E. Rensink, and G. D. Porter, J. Nucl. Mater. 196-198, 347 (1992)] has reproduced many of the observed experimental features.",

author = "Leonard, \{A. W.\} and Porter, \{G. D.\} and Wood, \{R. D.\} and Allen, \{S. L.\} and J. Boedo and Brooks, \{N. H.\} and Evans, \{T. E.\} and Fenstermacher, \{M. E.\} and Hill, \{D. N.\} and Isler, \{R. C.\} and Lasnier, \{C. J.\} and Lehmer, \{R. D.\} and Mahdavi, \{M. A.\} and R. Maingi and Moyer, \{R. A.\} and Petrie, \{T. W.\} and Schaffer, \{M. J.\} and Wade, \{M. R.\} and Watkins, \{J. G.\} and West, \{W. P.\} and Whyte, \{D. G.\}",

year = "1998",

month = may,

doi = "10.1063/1.872842",

language = "English",

volume = "5",

pages = "1736--1743",

journal = "Physics of Plasmas",

issn = "1070-664X",

publisher = "American Institute of Physics",

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Leonard, AW, Porter, GD, Wood, RD, Allen, SL, Boedo, J, Brooks, NH, Evans, TE, Fenstermacher, ME, Hill, DN, Isler, RC, Lasnier, CJ, Lehmer, RD, Mahdavi, MA, Maingi, R, Moyer, RA, Petrie, TW, Schaffer, MJ, Wade, MR, Watkins, JG, West, WP & Whyte, DG 1998, 'Radiative divertor plasmas with convection in DIII-D', Physics of Plasmas, vol. 5, no. 5 PART 1, pp. 1736-1743. https://doi.org/10.1063/1.872842

TY - JOUR

T1 - Radiative divertor plasmas with convection in DIII-D

AU - Leonard, A. W.

AU - Porter, G. D.

AU - Wood, R. D.

AU - Allen, S. L.

AU - Boedo, J.

AU - Brooks, N. H.

AU - Evans, T. E.

AU - Fenstermacher, M. E.

AU - Hill, D. N.

AU - Isler, R. C.

AU - Lasnier, C. J.

AU - Lehmer, R. D.

AU - Mahdavi, M. A.

AU - Maingi, R.

AU - Moyer, R. A.

AU - Petrie, T. W.

AU - Schaffer, M. J.

AU - Wade, M. R.

AU - Watkins, J. G.

AU - West, W. P.

AU - Whyte, D. G.

PY - 1998/5

Y1 - 1998/5

N2 - The radiation of divertor heat flux on DIII-D [J. Luxon et al, in Proceedings of the 11th International Conference on Plasma Physics and Controlled Nuclear Fusion (International Atomic Energy Agency, Vienna, 1987), p. 159] is shown to greatly exceed the limits imposed by assumptions of energy transport dominated by electron thermal conduction parallel to the magnetic field. Approximately 90% of the power flowing into the divertor is dissipated through low-Z radiation and plasma recombination. The dissipation is made possible by an extended region of low electron temperature in the divertor. A one-dimensional analysis of the parallel heat flux finds that the electron temperature profile is incompatible with conduction-dominated parallel transport. Plasma flow at up to the ion acoustic speed, produced by upstream ionization, can account for the parallel heat flux. Modeling with the two-dimensional fluid code UEDGE [T. Rognlien, J. L. Milovich, M. E. Rensink, and G. D. Porter, J. Nucl. Mater. 196-198, 347 (1992)] has reproduced many of the observed experimental features.

AB - The radiation of divertor heat flux on DIII-D [J. Luxon et al, in Proceedings of the 11th International Conference on Plasma Physics and Controlled Nuclear Fusion (International Atomic Energy Agency, Vienna, 1987), p. 159] is shown to greatly exceed the limits imposed by assumptions of energy transport dominated by electron thermal conduction parallel to the magnetic field. Approximately 90% of the power flowing into the divertor is dissipated through low-Z radiation and plasma recombination. The dissipation is made possible by an extended region of low electron temperature in the divertor. A one-dimensional analysis of the parallel heat flux finds that the electron temperature profile is incompatible with conduction-dominated parallel transport. Plasma flow at up to the ion acoustic speed, produced by upstream ionization, can account for the parallel heat flux. Modeling with the two-dimensional fluid code UEDGE [T. Rognlien, J. L. Milovich, M. E. Rensink, and G. D. Porter, J. Nucl. Mater. 196-198, 347 (1992)] has reproduced many of the observed experimental features.

UR - https://www.scopus.com/pages/publications/0001668793

U2 - 10.1063/1.872842

DO - 10.1063/1.872842

M3 - Article

AN - SCOPUS:0001668793

SN - 1070-664X

VL - 5

SP - 1736

EP - 1743

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 5 PART 1

ER -

Radiative divertor plasmas with convection in DIII-D

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