Far Scrape-Off Layer and Near Wall Plasma Studies in DIII-D
Abstract
Far scrape-off layer (SOL) plasma parameters in DIII-D depend strongly on the discharge density and confinement regime. In L-mode, cross-field transport increases with the average discharge density and elevates the far SOL density, thus increasing plasma-wall contact. Far SOL density near the low field side (LFS) of the main chamber wall also increases with decreasing plasma current and with decreasing outer wall gap. In H-mode, between edge localized modes (ELMs), plasma-wall contact is weaker than in L-mode. During ELMs plasma fluxes to the LFS wall increase to, or above the L-mode levels. A large fraction of the net cross-field fluxes is convected through the SOL by large amplitude intermittent transport events. In high density L-mode and during ELMs in H-mode, intermittent events propagate all the way to the LFS wall and may cause sputtering.
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- US Department of Energy (US)
- OSTI Identifier:
- 15011795
- Report Number(s):
- UCRL-CONF-208424
Journal ID: ISSN 0022-3115; TRN: US0501445
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Conference
- Resource Relation:
- Journal Volume: 337-339; Conference: Presented at: 16th International Conference on Plasma Surface Interactions, Portland, ME (US), 05/24/2004--05/28/2004; Other Information: PBD: 3 Dec 2004
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AMPLITUDES; CONFINEMENT; DOUBLET-3 DEVICE; EDGE LOCALIZED MODES; ELECTRIC CURRENTS; PLASMA; SOLS; SPUTTERING; TRANSPORT
Citation Formats
Rudakov, D, Boedo, J, Moyer, R, Brooks, N, Doerner, R, Evans, T, Fenstermacher, M, Groth, M, Hollmann, E, Krashennijov, S, Lasnier, C, Mahdavi, M, McKee, G, McLean, A, Stangeby, P, Wampler, W, Watkins, J, West, W, Whyte, D, and Wong, C. Far Scrape-Off Layer and Near Wall Plasma Studies in DIII-D. United States: N. p., 2004.
Web. doi:10.1016/j.jnucmat.2004.10.094.
Rudakov, D, Boedo, J, Moyer, R, Brooks, N, Doerner, R, Evans, T, Fenstermacher, M, Groth, M, Hollmann, E, Krashennijov, S, Lasnier, C, Mahdavi, M, McKee, G, McLean, A, Stangeby, P, Wampler, W, Watkins, J, West, W, Whyte, D, & Wong, C. Far Scrape-Off Layer and Near Wall Plasma Studies in DIII-D. United States. https://doi.org/10.1016/j.jnucmat.2004.10.094
Rudakov, D, Boedo, J, Moyer, R, Brooks, N, Doerner, R, Evans, T, Fenstermacher, M, Groth, M, Hollmann, E, Krashennijov, S, Lasnier, C, Mahdavi, M, McKee, G, McLean, A, Stangeby, P, Wampler, W, Watkins, J, West, W, Whyte, D, and Wong, C. 2004.
"Far Scrape-Off Layer and Near Wall Plasma Studies in DIII-D". United States. https://doi.org/10.1016/j.jnucmat.2004.10.094. https://www.osti.gov/servlets/purl/15011795.
@article{osti_15011795,
title = {Far Scrape-Off Layer and Near Wall Plasma Studies in DIII-D},
author = {Rudakov, D and Boedo, J and Moyer, R and Brooks, N and Doerner, R and Evans, T and Fenstermacher, M and Groth, M and Hollmann, E and Krashennijov, S and Lasnier, C and Mahdavi, M and McKee, G and McLean, A and Stangeby, P and Wampler, W and Watkins, J and West, W and Whyte, D and Wong, C},
abstractNote = {Far scrape-off layer (SOL) plasma parameters in DIII-D depend strongly on the discharge density and confinement regime. In L-mode, cross-field transport increases with the average discharge density and elevates the far SOL density, thus increasing plasma-wall contact. Far SOL density near the low field side (LFS) of the main chamber wall also increases with decreasing plasma current and with decreasing outer wall gap. In H-mode, between edge localized modes (ELMs), plasma-wall contact is weaker than in L-mode. During ELMs plasma fluxes to the LFS wall increase to, or above the L-mode levels. A large fraction of the net cross-field fluxes is convected through the SOL by large amplitude intermittent transport events. In high density L-mode and during ELMs in H-mode, intermittent events propagate all the way to the LFS wall and may cause sputtering.},
doi = {10.1016/j.jnucmat.2004.10.094},
url = {https://www.osti.gov/biblio/15011795},
journal = {},
issn = {0022-3115},
number = ,
volume = 337-339,
place = {United States},
year = {Fri Dec 03 00:00:00 EST 2004},
month = {Fri Dec 03 00:00:00 EST 2004}
}
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