The isotope effect in turbulent transport control by GAMs. Observation and gyrokinetic modeling

A. D. Gurchenko; E. Z. Gusakov; P. Niskala; A. B. Altukhov; L. A. Esipov; T. P. Kiviniemi; T. Korpilo; D. V. Kouprienko; S. I. Lashkul; S. Leerink; A. A. Perevalov; M. A. Irzak

doi:10.1088/0741-3335/58/4/044002

The isotope effect in turbulent transport control by GAMs. Observation and gyrokinetic modeling

A. D. Gurchenko^*, E. Z. Gusakov, P. Niskala, A. B. Altukhov, L. A. Esipov, T. P. Kiviniemi, T. Korpilo, D. V. Kouprienko, S. I. Lashkul, S. Leerink, A. A. Perevalov, M. A. Irzak

^*Corresponding author for this work

Ioffe Physical Technical Institute

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

34 Citations (Scopus)

Abstract

A comparative investigation of the isotope effect in multi-scale anomalous transport phenomena is performed both experimentally by highly localized turbulence diagnostics in comparable hydrogen and deuterium FT-2 tokamak discharges and theoretically with the help of global gyrokinetic modeling. Substantial excess of the geodesic acoustic mode (GAM) amplitude, radial wavelength and correlation length in a wide spatial region of deuterium discharge resulting in stronger modulation of drift-wave turbulence level is demonstrated by both approaches. A larger turbulence radial correlation length is found at LFS in D-discharge in experiment and a stronger modulation of gyrokinetic particles and energy fluxes is shown there by the gyrokinetic code. The gyrokinetic modeling demonstrated comparable levels of drift wave density and electric field fluctuations in hydrogen and deuterium discharges. Nevertheless, the mean value of the ion energy and particle anomalous flux provided by modeling shows the systematic isotope effect at all radii.

Original language	English
Article number	044002
Number of pages	9
Journal	Plasma Physics and Controlled Fusion
Volume	58
Issue number	4
DOIs	https://doi.org/10.1088/0741-3335/58/4/044002
Publication status	Published - 22 Jan 2016
MoE publication type	A1 Journal article-refereed

Keywords

isotope effect
geodesic acoustic mode (GAM)
turbulence
TOKAMAK
DIAGNOSTICS
SIMULATION
PLASMAS

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Gurchenko, A. D., Gusakov, E. Z., Niskala, P., Altukhov, A. B., Esipov, L. A., Kiviniemi, T. P., Korpilo, T., Kouprienko, D. V., Lashkul, S. I., Leerink, S., Perevalov, A. A., & Irzak, M. A. (2016). The isotope effect in turbulent transport control by GAMs. Observation and gyrokinetic modeling. Plasma Physics and Controlled Fusion, 58(4), [044002]. https://doi.org/10.1088/0741-3335/58/4/044002

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abstract = "A comparative investigation of the isotope effect in multi-scale anomalous transport phenomena is performed both experimentally by highly localized turbulence diagnostics in comparable hydrogen and deuterium FT-2 tokamak discharges and theoretically with the help of global gyrokinetic modeling. Substantial excess of the geodesic acoustic mode (GAM) amplitude, radial wavelength and correlation length in a wide spatial region of deuterium discharge resulting in stronger modulation of drift-wave turbulence level is demonstrated by both approaches. A larger turbulence radial correlation length is found at LFS in D-discharge in experiment and a stronger modulation of gyrokinetic particles and energy fluxes is shown there by the gyrokinetic code. The gyrokinetic modeling demonstrated comparable levels of drift wave density and electric field fluctuations in hydrogen and deuterium discharges. Nevertheless, the mean value of the ion energy and particle anomalous flux provided by modeling shows the systematic isotope effect at all radii.",

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Gurchenko, AD, Gusakov, EZ, Niskala, P, Altukhov, AB, Esipov, LA, Kiviniemi, TP, Korpilo, T, Kouprienko, DV, Lashkul, SI, Leerink, S, Perevalov, AA & Irzak, MA 2016, 'The isotope effect in turbulent transport control by GAMs. Observation and gyrokinetic modeling', Plasma Physics and Controlled Fusion, vol. 58, no. 4, 044002. https://doi.org/10.1088/0741-3335/58/4/044002

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AU - Gusakov, E. Z.

AU - Niskala, P.

AU - Altukhov, A. B.

AU - Esipov, L. A.

AU - Kiviniemi, T. P.

AU - Korpilo, T.

AU - Kouprienko, D. V.

AU - Lashkul, S. I.

AU - Leerink, S.

AU - Perevalov, A. A.

AU - Irzak, M. A.

PY - 2016/1/22

Y1 - 2016/1/22

N2 - A comparative investigation of the isotope effect in multi-scale anomalous transport phenomena is performed both experimentally by highly localized turbulence diagnostics in comparable hydrogen and deuterium FT-2 tokamak discharges and theoretically with the help of global gyrokinetic modeling. Substantial excess of the geodesic acoustic mode (GAM) amplitude, radial wavelength and correlation length in a wide spatial region of deuterium discharge resulting in stronger modulation of drift-wave turbulence level is demonstrated by both approaches. A larger turbulence radial correlation length is found at LFS in D-discharge in experiment and a stronger modulation of gyrokinetic particles and energy fluxes is shown there by the gyrokinetic code. The gyrokinetic modeling demonstrated comparable levels of drift wave density and electric field fluctuations in hydrogen and deuterium discharges. Nevertheless, the mean value of the ion energy and particle anomalous flux provided by modeling shows the systematic isotope effect at all radii.

AB - A comparative investigation of the isotope effect in multi-scale anomalous transport phenomena is performed both experimentally by highly localized turbulence diagnostics in comparable hydrogen and deuterium FT-2 tokamak discharges and theoretically with the help of global gyrokinetic modeling. Substantial excess of the geodesic acoustic mode (GAM) amplitude, radial wavelength and correlation length in a wide spatial region of deuterium discharge resulting in stronger modulation of drift-wave turbulence level is demonstrated by both approaches. A larger turbulence radial correlation length is found at LFS in D-discharge in experiment and a stronger modulation of gyrokinetic particles and energy fluxes is shown there by the gyrokinetic code. The gyrokinetic modeling demonstrated comparable levels of drift wave density and electric field fluctuations in hydrogen and deuterium discharges. Nevertheless, the mean value of the ion energy and particle anomalous flux provided by modeling shows the systematic isotope effect at all radii.

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SN - 0741-3335

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The isotope effect in turbulent transport control by GAMs. Observation and gyrokinetic modeling

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Simulations of turbulence-flow interplay in tokamak plasmas - Gyrokinetic studies of isotope effect on turbulent transport and flows in Ohmic discharges

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The isotope effect in turbulent transport control by GAMs. Observation and gyrokinetic modeling

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Keywords

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Simulations of turbulence-flow interplay in tokamak plasmas - Gyrokinetic studies of isotope effect on turbulent transport and flows in Ohmic discharges

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