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Title: UEDGE simulation of detached divertor operation in DIII-D with a chemically sputtered carbon source

Abstract

We describe the response of the scrape-off layer (SOL) plasma to variations in the intensity, and geometry of an intrinsic carbon source in DIII-D. Using the multi species 2-D fluid plasma code UEDGE we find plasma modes which are similar to those seen experimentally. At high sputtering coefficient the plasma discontinuously transitions to a state in which the radiation power exceeds the input power and no steady state solution is obtained. We believe this corresponds to the MARFE (Multifaceted Asymmetric Radiation from Edge) state seen experimentally, in which the core confinement is reduced.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
645331
Report Number(s):
UCRL-JC-127389; CONF-9706131-
ON: DE98051336; TRN: 98:008950
DOE Contract Number:  
W-7405-ENG-48; AC03-89ER51114
Resource Type:
Conference
Resource Relation:
Conference: 24. EPS conference on controlled fusion and plasma physics, Berchtesgaden (Germany), 9-13 Jun 1997; Other Information: PBD: 21 May 1997
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; DIVERTORS; COMPUTERIZED SIMULATION; U CODES; TWO-DIMENSIONAL CALCULATIONS; CARBON; SPUTTERING

Citation Formats

Porter, G D, Rognlien, T D, Fenstermacher, M E, Hill, D N, Lasnier, C J, Isler, R C, and DIII-D Team. UEDGE simulation of detached divertor operation in DIII-D with a chemically sputtered carbon source. United States: N. p., 1997. Web.
Porter, G D, Rognlien, T D, Fenstermacher, M E, Hill, D N, Lasnier, C J, Isler, R C, & DIII-D Team. UEDGE simulation of detached divertor operation in DIII-D with a chemically sputtered carbon source. United States.
Porter, G D, Rognlien, T D, Fenstermacher, M E, Hill, D N, Lasnier, C J, Isler, R C, and DIII-D Team. 1997. "UEDGE simulation of detached divertor operation in DIII-D with a chemically sputtered carbon source". United States. https://www.osti.gov/servlets/purl/645331.
@article{osti_645331,
title = {UEDGE simulation of detached divertor operation in DIII-D with a chemically sputtered carbon source},
author = {Porter, G D and Rognlien, T D and Fenstermacher, M E and Hill, D N and Lasnier, C J and Isler, R C and DIII-D Team},
abstractNote = {We describe the response of the scrape-off layer (SOL) plasma to variations in the intensity, and geometry of an intrinsic carbon source in DIII-D. Using the multi species 2-D fluid plasma code UEDGE we find plasma modes which are similar to those seen experimentally. At high sputtering coefficient the plasma discontinuously transitions to a state in which the radiation power exceeds the input power and no steady state solution is obtained. We believe this corresponds to the MARFE (Multifaceted Asymmetric Radiation from Edge) state seen experimentally, in which the core confinement is reduced.},
doi = {},
url = {https://www.osti.gov/biblio/645331}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {5}
}

Conference:
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