Local scrape-off layer control using biased electrodes in NSTX

S. J. Zweben; R. J. Maqueda; A. L. Roquemore; C. E. Bush; R. Kaita; R. J. Marsala; Y. Raitses; R. H. Cohen; D. D. Ryutov

doi:10.1088/0741-3335/51/10/105012

Local scrape-off layer control using biased electrodes in NSTX

S. J. Zweben, R. J. Maqueda, A. L. Roquemore, C. E. Bush, R. Kaita, R. J. Marsala, Y. Raitses, R. H. Cohen, D. D. Ryutov

PPPL Discovery Plasma Science

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

25 Scopus citations

Abstract

An experiment on the National Spherical Torus Experiment (NSTX) was designed to test the theory that biased electrodes can affect the local scrape-off layer (SOL) by creating a strong radial E × B flow (Cohen and Ryutov 1997 Nucl. Fusion 37 621). These electrodes were located near the outer midplane and were biased at up to ±90 V with respect to the local vacuum vessel ground. This biasing caused large changes in the local SOL profiles as measured by an array of Langmuir probes between the electrodes. A theory is presented which at least partially describes the experimental results.

Original language	English (US)
Article number	105012
Journal	Plasma Physics and Controlled Fusion
Volume	51
Issue number	10
DOIs	https://doi.org/10.1088/0741-3335/51/10/105012
State	Published - 2009

All Science Journal Classification (ASJC) codes

Nuclear Energy and Engineering
Condensed Matter Physics

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title = "Local scrape-off layer control using biased electrodes in NSTX",

abstract = "An experiment on the National Spherical Torus Experiment (NSTX) was designed to test the theory that biased electrodes can affect the local scrape-off layer (SOL) by creating a strong radial E × B flow (Cohen and Ryutov 1997 Nucl. Fusion 37 621). These electrodes were located near the outer midplane and were biased at up to ±90 V with respect to the local vacuum vessel ground. This biasing caused large changes in the local SOL profiles as measured by an array of Langmuir probes between the electrodes. A theory is presented which at least partially describes the experimental results.",

author = "Zweben, \{S. J.\} and Maqueda, \{R. J.\} and Roquemore, \{A. L.\} and Bush, \{C. E.\} and R. Kaita and Marsala, \{R. J.\} and Y. Raitses and Cohen, \{R. H.\} and Ryutov, \{D. D.\}",

year = "2009",

doi = "10.1088/0741-3335/51/10/105012",

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T1 - Local scrape-off layer control using biased electrodes in NSTX

AU - Zweben, S. J.

AU - Maqueda, R. J.

AU - Roquemore, A. L.

AU - Bush, C. E.

AU - Kaita, R.

AU - Marsala, R. J.

AU - Raitses, Y.

AU - Cohen, R. H.

AU - Ryutov, D. D.

PY - 2009

Y1 - 2009

N2 - An experiment on the National Spherical Torus Experiment (NSTX) was designed to test the theory that biased electrodes can affect the local scrape-off layer (SOL) by creating a strong radial E × B flow (Cohen and Ryutov 1997 Nucl. Fusion 37 621). These electrodes were located near the outer midplane and were biased at up to ±90 V with respect to the local vacuum vessel ground. This biasing caused large changes in the local SOL profiles as measured by an array of Langmuir probes between the electrodes. A theory is presented which at least partially describes the experimental results.

AB - An experiment on the National Spherical Torus Experiment (NSTX) was designed to test the theory that biased electrodes can affect the local scrape-off layer (SOL) by creating a strong radial E × B flow (Cohen and Ryutov 1997 Nucl. Fusion 37 621). These electrodes were located near the outer midplane and were biased at up to ±90 V with respect to the local vacuum vessel ground. This biasing caused large changes in the local SOL profiles as measured by an array of Langmuir probes between the electrodes. A theory is presented which at least partially describes the experimental results.

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M3 - Article

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SN - 0741-3335

VL - 51

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 10

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Local scrape-off layer control using biased electrodes in NSTX

Abstract

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