Helium transport and exhaust studies of H-mode discharges in the DIII-D tokamak

D. L. Hillis; M. R. Wade; J. T. Hogan; W. P. West; K. H. Burrell; R. Maingi; C. C. Klepper; M. M. Menon; P. K. Mioduszewski; M. A. Mahdavi; G. L. Jackson; N. H. Brooks; D. F. Finkenthal

doi:10.1088/0741-3335/36/7A/023

Helium transport and exhaust studies of H-mode discharges in the DIII-D tokamak

D. L. Hillis, M. R. Wade, J. T. Hogan, W. P. West, K. H. Burrell, R. Maingi, C. C. Klepper, M. M. Menon, P. K. Mioduszewski, M. A. Mahdavi, G. L. Jackson, N. H. Brooks, D. F. Finkenthal

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Abstract

A collaborative program has been initiated on DIII-D to study helium (He) transport and exhaust in H-mode plasmas. To simulate the presence of He ash in DIII-D, a 50 ms He puff is injected into a DIII-D plasma, resulting in a He concentration of approximately 15%. The time dependence of the He density profiles in the plasma core is measured with charge-exchange recombination spectroscopy and the He spatial distribution on the divertor floor is studied with an impurity monitor array. The dependence of core transport diffusivities as a function of edge-localized modes (ELM) frequency has been studied and the first demonstration made of He exhaust from an ELMing H-mode plasma in a diverted tokamak. A measured value of tau *_He/ tau _E of 14 was obtained, which is within the acceptable range for a fusion reactor.

Original language	English
Article number	023
Pages (from-to)	A171-A176
Journal	Plasma Physics and Controlled Fusion
Volume	36
Issue number	7 A
DOIs	https://doi.org/10.1088/0741-3335/36/7A/023
State	Published - 1994

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Hillis, D. L., Wade, M. R., Hogan, J. T., West, W. P., Burrell, K. H., Maingi, R., Klepper, C. C., Menon, M. M., Mioduszewski, P. K., Mahdavi, M. A., Jackson, G. L., Brooks, N. H., & Finkenthal, D. F. (1994). Helium transport and exhaust studies of H-mode discharges in the DIII-D tokamak. Plasma Physics and Controlled Fusion, 36(7 A), A171-A176. Article 023. https://doi.org/10.1088/0741-3335/36/7A/023

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title = "Helium transport and exhaust studies of H-mode discharges in the DIII-D tokamak",

abstract = "A collaborative program has been initiated on DIII-D to study helium (He) transport and exhaust in H-mode plasmas. To simulate the presence of He ash in DIII-D, a 50 ms He puff is injected into a DIII-D plasma, resulting in a He concentration of approximately 15%. The time dependence of the He density profiles in the plasma core is measured with charge-exchange recombination spectroscopy and the He spatial distribution on the divertor floor is studied with an impurity monitor array. The dependence of core transport diffusivities as a function of edge-localized modes (ELM) frequency has been studied and the first demonstration made of He exhaust from an ELMing H-mode plasma in a diverted tokamak. A measured value of tau *He/ tau E of 14 was obtained, which is within the acceptable range for a fusion reactor.",

author = "Hillis, {D. L.} and Wade, {M. R.} and Hogan, {J. T.} and West, {W. P.} and Burrell, {K. H.} and R. Maingi and Klepper, {C. C.} and Menon, {M. M.} and Mioduszewski, {P. K.} and Mahdavi, {M. A.} and Jackson, {G. L.} and Brooks, {N. H.} and Finkenthal, {D. F.}",

year = "1994",

doi = "10.1088/0741-3335/36/7A/023",

language = "English",

volume = "36",

pages = "A171--A176",

journal = "Plasma Physics and Controlled Fusion",

issn = "0741-3335",

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}

Hillis, DL, Wade, MR, Hogan, JT, West, WP, Burrell, KH, Maingi, R, Klepper, CC, Menon, MM, Mioduszewski, PK, Mahdavi, MA, Jackson, GL, Brooks, NH & Finkenthal, DF 1994, 'Helium transport and exhaust studies of H-mode discharges in the DIII-D tokamak', Plasma Physics and Controlled Fusion, vol. 36, no. 7 A, 023, pp. A171-A176. https://doi.org/10.1088/0741-3335/36/7A/023

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T1 - Helium transport and exhaust studies of H-mode discharges in the DIII-D tokamak

AU - Hillis, D. L.

AU - Wade, M. R.

AU - Hogan, J. T.

AU - West, W. P.

AU - Burrell, K. H.

AU - Maingi, R.

AU - Klepper, C. C.

AU - Menon, M. M.

AU - Mioduszewski, P. K.

AU - Mahdavi, M. A.

AU - Jackson, G. L.

AU - Brooks, N. H.

AU - Finkenthal, D. F.

PY - 1994

Y1 - 1994

N2 - A collaborative program has been initiated on DIII-D to study helium (He) transport and exhaust in H-mode plasmas. To simulate the presence of He ash in DIII-D, a 50 ms He puff is injected into a DIII-D plasma, resulting in a He concentration of approximately 15%. The time dependence of the He density profiles in the plasma core is measured with charge-exchange recombination spectroscopy and the He spatial distribution on the divertor floor is studied with an impurity monitor array. The dependence of core transport diffusivities as a function of edge-localized modes (ELM) frequency has been studied and the first demonstration made of He exhaust from an ELMing H-mode plasma in a diverted tokamak. A measured value of tau *He/ tau E of 14 was obtained, which is within the acceptable range for a fusion reactor.

AB - A collaborative program has been initiated on DIII-D to study helium (He) transport and exhaust in H-mode plasmas. To simulate the presence of He ash in DIII-D, a 50 ms He puff is injected into a DIII-D plasma, resulting in a He concentration of approximately 15%. The time dependence of the He density profiles in the plasma core is measured with charge-exchange recombination spectroscopy and the He spatial distribution on the divertor floor is studied with an impurity monitor array. The dependence of core transport diffusivities as a function of edge-localized modes (ELM) frequency has been studied and the first demonstration made of He exhaust from an ELMing H-mode plasma in a diverted tokamak. A measured value of tau *He/ tau E of 14 was obtained, which is within the acceptable range for a fusion reactor.

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ER -

Helium transport and exhaust studies of H-mode discharges in the DIII-D tokamak

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