Impurity enrichment and radiative enhancement using induced SOL flow in DIII-D

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

doi:10.1016/S0022-3115(98)00813-7

Impurity enrichment and radiative enhancement using induced SOL flow in DIII-D

M. R. Wade, W. P. West, R. D. Wood, S. L. Allen, J. A. Boedo, N. H. Brooks, M. E. Fenstermacher, D. N. Hill, J. T. Hogan, R. C. Isler, G. L. Jackson, C. J. Lasnier, R. Lehmer, A. W. Leonard, M. A. Mahdavi, R. Maingi, R. A. Moyer, T. H. Osborne, T. W. Petrie, M. J. SchafferR. D. Stambaugh, J. G. Watkins, D. G. Whyte

Fusion and Fission Energy and Science Di

Research output: Contribution to journal › Conference article › peer-review

48 Scopus citations

Abstract

Experiments on DIII-D have demonstrated the efficacy of using induced scrape-off-layer (SOL) flow to preferentially enrich impurities in the divertor plasma. This SOL flow is produced through simultaneous deuterium gas injection at the midplane and divertor exhaust. Using this SOL flow, an improvement in enrichment (defined as the ratio of impurity fraction in the divertor to that in the plasma core) has been observed for all impurities in trace-level experiments (i.e., impurity level is non-perturbative), with the degree of improvement increasing with impurity atomic number. In the case of argon, exhaust gas enrichment using modest SOL flow is as high as 17. Using this induced SOL flow technique and argon injection, radiative plasmas have been produced that combine high radiation losses (P_rad/P_input>70%), low core fuel dilution (Z_eff<1.9), and good core confinement (τ_E>1.0 τ_E.ITER93H).

Original language	English
Pages (from-to)	44-50
Number of pages	7
Journal	Journal of Nuclear Materials
Volume	266
DOIs	https://doi.org/10.1016/S0022-3115(98)00813-7
State	Published - Mar 2 1999

Funding

Work supported by US Department of Energy under Contract Nos. DE-AC03-89ER51114, DE-AC05-96OR22464, W-7405-ENG-48, DE-AC04-94AL85000, and Grant No. DE-FG03-95ER54294.

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Wade, M. R., West, W. P., Wood, R. D., Allen, S. L., Boedo, J. A., Brooks, N. H., Fenstermacher, M. E., Hill, D. N., Hogan, J. T., Isler, R. C., Jackson, G. L., Lasnier, C. J., Lehmer, R., Leonard, A. W., Mahdavi, M. A., Maingi, R., Moyer, R. A., Osborne, T. H., Petrie, T. W., ... Whyte, D. G. (1999). Impurity enrichment and radiative enhancement using induced SOL flow in DIII-D. Journal of Nuclear Materials, 266, 44-50. https://doi.org/10.1016/S0022-3115(98)00813-7

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title = "Impurity enrichment and radiative enhancement using induced SOL flow in DIII-D",

abstract = "Experiments on DIII-D have demonstrated the efficacy of using induced scrape-off-layer (SOL) flow to preferentially enrich impurities in the divertor plasma. This SOL flow is produced through simultaneous deuterium gas injection at the midplane and divertor exhaust. Using this SOL flow, an improvement in enrichment (defined as the ratio of impurity fraction in the divertor to that in the plasma core) has been observed for all impurities in trace-level experiments (i.e., impurity level is non-perturbative), with the degree of improvement increasing with impurity atomic number. In the case of argon, exhaust gas enrichment using modest SOL flow is as high as 17. Using this induced SOL flow technique and argon injection, radiative plasmas have been produced that combine high radiation losses (Prad/Pinput>70%), low core fuel dilution (Zeff<1.9), and good core confinement (τE>1.0 τE.ITER93H).",

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

year = "1999",

month = mar,

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doi = "10.1016/S0022-3115(98)00813-7",

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Wade, MR, West, WP, Wood, RD, Allen, SL, Boedo, JA, Brooks, NH, Fenstermacher, ME, Hill, DN, Hogan, JT, Isler, RC, Jackson, GL, Lasnier, CJ, Lehmer, R, Leonard, AW, Mahdavi, MA, Maingi, R, Moyer, RA, Osborne, TH, Petrie, TW, Schaffer, MJ, Stambaugh, RD, Watkins, JG & Whyte, DG 1999, 'Impurity enrichment and radiative enhancement using induced SOL flow in DIII-D', Journal of Nuclear Materials, vol. 266, pp. 44-50. https://doi.org/10.1016/S0022-3115(98)00813-7

TY - JOUR

T1 - Impurity enrichment and radiative enhancement using induced SOL flow in DIII-D

AU - Wade, M. R.

AU - West, W. P.

AU - Wood, R. D.

AU - Allen, S. L.

AU - Boedo, J. A.

AU - Brooks, N. H.

AU - Fenstermacher, M. E.

AU - Hill, D. N.

AU - Hogan, J. T.

AU - Isler, R. C.

AU - Jackson, G. L.

AU - Lasnier, C. J.

AU - Lehmer, R.

AU - Leonard, A. W.

AU - Mahdavi, M. A.

AU - Maingi, R.

AU - Moyer, R. A.

AU - Osborne, T. H.

AU - Petrie, T. W.

AU - Schaffer, M. J.

AU - Stambaugh, R. D.

AU - Watkins, J. G.

AU - Whyte, D. G.

PY - 1999/3/2

Y1 - 1999/3/2

N2 - Experiments on DIII-D have demonstrated the efficacy of using induced scrape-off-layer (SOL) flow to preferentially enrich impurities in the divertor plasma. This SOL flow is produced through simultaneous deuterium gas injection at the midplane and divertor exhaust. Using this SOL flow, an improvement in enrichment (defined as the ratio of impurity fraction in the divertor to that in the plasma core) has been observed for all impurities in trace-level experiments (i.e., impurity level is non-perturbative), with the degree of improvement increasing with impurity atomic number. In the case of argon, exhaust gas enrichment using modest SOL flow is as high as 17. Using this induced SOL flow technique and argon injection, radiative plasmas have been produced that combine high radiation losses (Prad/Pinput>70%), low core fuel dilution (Zeff<1.9), and good core confinement (τE>1.0 τE.ITER93H).

AB - Experiments on DIII-D have demonstrated the efficacy of using induced scrape-off-layer (SOL) flow to preferentially enrich impurities in the divertor plasma. This SOL flow is produced through simultaneous deuterium gas injection at the midplane and divertor exhaust. Using this SOL flow, an improvement in enrichment (defined as the ratio of impurity fraction in the divertor to that in the plasma core) has been observed for all impurities in trace-level experiments (i.e., impurity level is non-perturbative), with the degree of improvement increasing with impurity atomic number. In the case of argon, exhaust gas enrichment using modest SOL flow is as high as 17. Using this induced SOL flow technique and argon injection, radiative plasmas have been produced that combine high radiation losses (Prad/Pinput>70%), low core fuel dilution (Zeff<1.9), and good core confinement (τE>1.0 τE.ITER93H).

UR - http://www.scopus.com/inward/record.url?scp=0032634255&partnerID=8YFLogxK

U2 - 10.1016/S0022-3115(98)00813-7

DO - 10.1016/S0022-3115(98)00813-7

M3 - Conference article

AN - SCOPUS:0032634255

SN - 0022-3115

VL - 266

SP - 44

EP - 50

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

Impurity enrichment and radiative enhancement using induced SOL flow in DIII-D

Abstract

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