Blob structure and motion in the edge and SOL of NSTX

S. J. Zweben; J. R. Myra; W. M. Davis; D. A. D'Ippolito; T. K. Gray; S. M. Kaye; B. P. Leblanc; R. J. Maqueda; D. A. Russell; D. P. Stotler

doi:10.1088/0741-3335/58/4/044007

Blob structure and motion in the edge and SOL of NSTX

S. J. Zweben, J. R. Myra, W. M. Davis, D. A. D'Ippolito, T. K. Gray, S. M. Kaye, B. P. Leblanc, R. J. Maqueda, D. A. Russell, D. P. Stotler

Power Exhaust and Particle Control

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78 Scopus citations

Abstract

The structure and motion of discrete plasma blobs (a.k.a. filaments) in the edge and scrape-off layer of NSTX is studied for representative Ohmic and H-mode discharges. Individual blobs were tracked in the 2D radial versus poloidal plane using data from the gas puff imaging diagnostic taken at 400 000 frames s^-1. A database of blob amplitude, size, ellipticity, tilt, and velocity was obtained for ∼45 000 individual blobs. Empirical relationships between various properties are described, e.g. blob speed versus amplitude and blob tilt versus ellipticity. The blob velocities are also compared with analytic models.

Original language	English
Article number	044007
Journal	Plasma Physics and Controlled Fusion
Volume	58
Issue number	4
DOIs	https://doi.org/10.1088/0741-3335/58/4/044007
State	Published - Jan 28 2016

Bibliographical note

Publisher Copyright:
© 2016 IOP Publishing Ltd.

Keywords

edge
tokamak
turbulence

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1088/0741-3335/58/4/044007

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title = "Blob structure and motion in the edge and SOL of NSTX",

abstract = "The structure and motion of discrete plasma blobs (a.k.a. filaments) in the edge and scrape-off layer of NSTX is studied for representative Ohmic and H-mode discharges. Individual blobs were tracked in the 2D radial versus poloidal plane using data from the gas puff imaging diagnostic taken at 400 000 frames s-1. A database of blob amplitude, size, ellipticity, tilt, and velocity was obtained for ∼45 000 individual blobs. Empirical relationships between various properties are described, e.g. blob speed versus amplitude and blob tilt versus ellipticity. The blob velocities are also compared with analytic models.",

keywords = "edge, tokamak, turbulence",

author = "Zweben, {S. J.} and Myra, {J. R.} and Davis, {W. M.} and D'Ippolito, {D. A.} and Gray, {T. K.} and Kaye, {S. M.} and Leblanc, {B. P.} and Maqueda, {R. J.} and Russell, {D. A.} and Stotler, {D. P.}",

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doi = "10.1088/0741-3335/58/4/044007",

language = "English",

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AU - Zweben, S. J.

AU - Myra, J. R.

AU - Davis, W. M.

AU - D'Ippolito, D. A.

AU - Gray, T. K.

AU - Kaye, S. M.

AU - Leblanc, B. P.

AU - Maqueda, R. J.

AU - Russell, D. A.

AU - Stotler, D. P.

PY - 2016/1/28

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N2 - The structure and motion of discrete plasma blobs (a.k.a. filaments) in the edge and scrape-off layer of NSTX is studied for representative Ohmic and H-mode discharges. Individual blobs were tracked in the 2D radial versus poloidal plane using data from the gas puff imaging diagnostic taken at 400 000 frames s-1. A database of blob amplitude, size, ellipticity, tilt, and velocity was obtained for ∼45 000 individual blobs. Empirical relationships between various properties are described, e.g. blob speed versus amplitude and blob tilt versus ellipticity. The blob velocities are also compared with analytic models.

AB - The structure and motion of discrete plasma blobs (a.k.a. filaments) in the edge and scrape-off layer of NSTX is studied for representative Ohmic and H-mode discharges. Individual blobs were tracked in the 2D radial versus poloidal plane using data from the gas puff imaging diagnostic taken at 400 000 frames s-1. A database of blob amplitude, size, ellipticity, tilt, and velocity was obtained for ∼45 000 individual blobs. Empirical relationships between various properties are described, e.g. blob speed versus amplitude and blob tilt versus ellipticity. The blob velocities are also compared with analytic models.

KW - edge

KW - tokamak

KW - turbulence

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DO - 10.1088/0741-3335/58/4/044007

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SN - 0741-3335

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JF - Plasma Physics and Controlled Fusion

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M1 - 044007

ER -

Blob structure and motion in the edge and SOL of NSTX

Abstract

Bibliographical note

Keywords

UN SDGs

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