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Title: Lithium Wall Conditioning And Surface Dust Detection On NSTX

Abstract

Lithium evaporation onto NSTX plasma facing components (PFC) has resulted in improved energy confinement, and reductions in the number and amplitude of edge-localized modes (ELMs) up to the point of complete ELM suppression. The associated PFC surface chemistry has been investigated with a novel plasma material interface probe connected to an in-vacuo surface analysis station. Analysis has demonstrated that binding of D atoms to the polycrystalline graphite material of the PFCs is fundamentally changed by lithium - in particular deuterium atoms become weakly bonded near lithium atoms themselves bound to either oxygen or the carbon from the underlying material. Surface dust inside NSTX has been detected in real-time using a highly sensitive electrostatic dust detector. In a separate experiment, electrostatic removal of dust via three concentric spiral-shaped electrodes covered by a dielectric and driven by a high voltage 3-phase waveform was evaluated for potential application to fusion reactors

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1014576
Report Number(s):
PPPL-4625
TRN: US1102616
DOE Contract Number:  
DE-ACO2-09CH11466
Resource Type:
Conference
Resource Relation:
Conference: 13th PFMC Workshop, Rosenheim, Germany, May 9-13, 2011
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AMPLITUDES; ATOMS; CARBON; CHEMISTRY; CONFINEMENT; DETECTION; DEUTERIUM; DIELECTRIC MATERIALS; DUSTS; ELECTRODES; ELECTROSTATICS; EVAPORATION; GRAPHITE; LITHIUM; OXYGEN; PLASMA; PROBES; REMOVAL; THERMONUCLEAR REACTORS; WAVE FORMS; Dust Diagnostics,Lithium, Plasma-wall Interaction

Citation Formats

Skinner, C H, Bell, M G, Friesen, F.Q.L., Heim, B, Jaworski, M A, Kugel, H, Maingi, R, Rais, B, and Taylor, C N. Lithium Wall Conditioning And Surface Dust Detection On NSTX. United States: N. p., 2011. Web.
Skinner, C H, Bell, M G, Friesen, F.Q.L., Heim, B, Jaworski, M A, Kugel, H, Maingi, R, Rais, B, & Taylor, C N. Lithium Wall Conditioning And Surface Dust Detection On NSTX. United States.
Skinner, C H, Bell, M G, Friesen, F.Q.L., Heim, B, Jaworski, M A, Kugel, H, Maingi, R, Rais, B, and Taylor, C N. Mon . "Lithium Wall Conditioning And Surface Dust Detection On NSTX". United States. doi:. https://www.osti.gov/servlets/purl/1014576.
@article{osti_1014576,
title = {Lithium Wall Conditioning And Surface Dust Detection On NSTX},
author = {Skinner, C H and Bell, M G and Friesen, F.Q.L. and Heim, B and Jaworski, M A and Kugel, H and Maingi, R and Rais, B and Taylor, C N},
abstractNote = {Lithium evaporation onto NSTX plasma facing components (PFC) has resulted in improved energy confinement, and reductions in the number and amplitude of edge-localized modes (ELMs) up to the point of complete ELM suppression. The associated PFC surface chemistry has been investigated with a novel plasma material interface probe connected to an in-vacuo surface analysis station. Analysis has demonstrated that binding of D atoms to the polycrystalline graphite material of the PFCs is fundamentally changed by lithium - in particular deuterium atoms become weakly bonded near lithium atoms themselves bound to either oxygen or the carbon from the underlying material. Surface dust inside NSTX has been detected in real-time using a highly sensitive electrostatic dust detector. In a separate experiment, electrostatic removal of dust via three concentric spiral-shaped electrodes covered by a dielectric and driven by a high voltage 3-phase waveform was evaluated for potential application to fusion reactors},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon May 23 00:00:00 EDT 2011},
month = {Mon May 23 00:00:00 EDT 2011}
}

Conference:
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