Experimental evidence of edge turbulence driven by multiple mechanisms in ATF

C. Hidalgo; J. H. Harris; T. Uckan; G. R. Hanson; J. D. Bell; M. A. Meier; C. P. Ritz; A. J. Wootton

doi:10.1088/0029-5515/33/1/I14

Experimental evidence of edge turbulence driven by multiple mechanisms in ATF

C. Hidalgo, J. H. Harris, T. Uckan, G. R. Hanson, J. D. Bell, M. A. Meier, C. P. Ritz, A. J. Wootton

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Abstract

The scaling properties of edge fluctuations have been investigated using Langmuir probes in the edge region of the Advanced Toroidal Facility (ATF). The fluctuations in the ion saturation current (_s/I_s) and the transport inferred from the fluctuations increase with increasing density gradient, while the local electron temperature is kept unchanged. The modification of the electron temperature in the range 10-50 eV while keeping the density profile constant does not have any significant influence on _s/I_s. In regions where E_r/B 0, the poloidal phase velocity of the fluctuations is given by v_ph 2T _e/L_nB. More than one of the proposed mechanisms must be invoked to explain all the experimental observations.

Original language	English
Article number	I14
Pages (from-to)	146-149
Number of pages	4
Journal	Nuclear Fusion
Volume	33
Issue number	1
DOIs	https://doi.org/10.1088/0029-5515/33/1/I14
State	Published - 1993
Externally published	Yes

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title = "Experimental evidence of edge turbulence driven by multiple mechanisms in ATF",

abstract = "The scaling properties of edge fluctuations have been investigated using Langmuir probes in the edge region of the Advanced Toroidal Facility (ATF). The fluctuations in the ion saturation current (s/Is) and the transport inferred from the fluctuations increase with increasing density gradient, while the local electron temperature is kept unchanged. The modification of the electron temperature in the range 10-50 eV while keeping the density profile constant does not have any significant influence on s/Is. In regions where Er/B 0, the poloidal phase velocity of the fluctuations is given by vph 2T e/LnB. More than one of the proposed mechanisms must be invoked to explain all the experimental observations.",

author = "C. Hidalgo and Harris, {J. H.} and T. Uckan and Hanson, {G. R.} and Bell, {J. D.} and Meier, {M. A.} and Ritz, {C. P.} and Wootton, {A. J.}",

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T1 - Experimental evidence of edge turbulence driven by multiple mechanisms in ATF

AU - Hidalgo, C.

AU - Harris, J. H.

AU - Uckan, T.

AU - Hanson, G. R.

AU - Bell, J. D.

AU - Meier, M. A.

AU - Ritz, C. P.

AU - Wootton, A. J.

PY - 1993

Y1 - 1993

N2 - The scaling properties of edge fluctuations have been investigated using Langmuir probes in the edge region of the Advanced Toroidal Facility (ATF). The fluctuations in the ion saturation current (s/Is) and the transport inferred from the fluctuations increase with increasing density gradient, while the local electron temperature is kept unchanged. The modification of the electron temperature in the range 10-50 eV while keeping the density profile constant does not have any significant influence on s/Is. In regions where Er/B 0, the poloidal phase velocity of the fluctuations is given by vph 2T e/LnB. More than one of the proposed mechanisms must be invoked to explain all the experimental observations.

AB - The scaling properties of edge fluctuations have been investigated using Langmuir probes in the edge region of the Advanced Toroidal Facility (ATF). The fluctuations in the ion saturation current (s/Is) and the transport inferred from the fluctuations increase with increasing density gradient, while the local electron temperature is kept unchanged. The modification of the electron temperature in the range 10-50 eV while keeping the density profile constant does not have any significant influence on s/Is. In regions where Er/B 0, the poloidal phase velocity of the fluctuations is given by vph 2T e/LnB. More than one of the proposed mechanisms must be invoked to explain all the experimental observations.

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SN - 0029-5515

VL - 33

SP - 146

EP - 149

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 1

M1 - I14

ER -

Experimental evidence of edge turbulence driven by multiple mechanisms in ATF

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