Temperature gradient driven electron transport in NSTX and Tore Supra

W. Horton; H. V. Wong; P. J. Morrison; A. Wurm; J. H. Kim; J. C. Perez; J. Pratt; G. T. Hoang; B. P. LeBlanc; R. Ball

doi:10.1088/0029-5515/45/8/025

Temperature gradient driven electron transport in NSTX and Tore Supra

W. Horton^*, H. V. Wong, P. J. Morrison, A. Wurm, J. H. Kim, J. C. Perez, J. Pratt, G. T. Hoang, B. P. LeBlanc, R. Ball

^*Corresponding author for this work

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

22 Citations (Scopus)

Abstract

Electron thermal fluxes are derived from the power balance for Tore Supra (TS) and NSTX discharges with centrally deposited fast wave electron heating. Measurements of the electron temperature and density profiles, combined with ray tracing computations of the power absorption profiles, allow detailed interpretation of the thermal flux versus temperature gradient. Evidence supporting the occurrence of electron temperature gradient turbulent transport in the two confinement devices is found. With control of the magnetic rotational transform profile and the heating power, internal transport barriers are created in TS and NSTX discharges. These partial transport barriers are argued to be a universal feature of transport equations in the presence of invariant tori that are intrinsic to non-monotonic rotational transforms in dynamical systems.

Original language	English
Pages (from-to)	976-985
Number of pages	10
Journal	Nuclear Fusion
Volume	45
Issue number	8
DOIs	https://doi.org/10.1088/0029-5515/45/8/025
Publication status	Published - 1 Aug 2005

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title = "Temperature gradient driven electron transport in NSTX and Tore Supra",

abstract = "Electron thermal fluxes are derived from the power balance for Tore Supra (TS) and NSTX discharges with centrally deposited fast wave electron heating. Measurements of the electron temperature and density profiles, combined with ray tracing computations of the power absorption profiles, allow detailed interpretation of the thermal flux versus temperature gradient. Evidence supporting the occurrence of electron temperature gradient turbulent transport in the two confinement devices is found. With control of the magnetic rotational transform profile and the heating power, internal transport barriers are created in TS and NSTX discharges. These partial transport barriers are argued to be a universal feature of transport equations in the presence of invariant tori that are intrinsic to non-monotonic rotational transforms in dynamical systems.",

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T1 - Temperature gradient driven electron transport in NSTX and Tore Supra

AU - Horton, W.

AU - Wong, H. V.

AU - Morrison, P. J.

AU - Wurm, A.

AU - Kim, J. H.

AU - Perez, J. C.

AU - Pratt, J.

AU - Hoang, G. T.

AU - LeBlanc, B. P.

AU - Ball, R.

PY - 2005/8/1

Y1 - 2005/8/1

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AB - Electron thermal fluxes are derived from the power balance for Tore Supra (TS) and NSTX discharges with centrally deposited fast wave electron heating. Measurements of the electron temperature and density profiles, combined with ray tracing computations of the power absorption profiles, allow detailed interpretation of the thermal flux versus temperature gradient. Evidence supporting the occurrence of electron temperature gradient turbulent transport in the two confinement devices is found. With control of the magnetic rotational transform profile and the heating power, internal transport barriers are created in TS and NSTX discharges. These partial transport barriers are argued to be a universal feature of transport equations in the presence of invariant tori that are intrinsic to non-monotonic rotational transforms in dynamical systems.

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DO - 10.1088/0029-5515/45/8/025

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VL - 45

SP - 976

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JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 8

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Temperature gradient driven electron transport in NSTX and Tore Supra

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