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Title: SOLPS analysis of the necessary conditions for detachment cliff

Abstract

SOLPS modeling including full cross-filed drifts is used, for the first time, to reproduce the step-like detachment onset observed in the DIII-D tokamak previously simulated with UEDGE [Jaervinen A. E. et al., 2018 Phys. Rev. Lett.121 075001], and to further investigate the underlying physics processes. The SOLPS analysis reveals a strong interplay between the E×B drift-driven flows and carbon radiation in DIII-D. The modeling shows that the high confinement H-mode facilitates the formation of such a detachment cliff due to the narrow SOL width and hence steep radial gradients near the separatrix, which enhances the poloidal E×B drift. Furthermore, the SOLPS modeling indicates that carbon radiation also plays a key role in the formation of the detachment cliff in DIII-D without additional impurity seeding. These findings may have significant implications for the control and maintenance of divertor detachment for the steady-state operation of high-power fusion devices.

Authors:
 [1];  [1];  [2]; ORCiD logo [3];  [1];  [4];  [2]; ORCiD logo [5]
  1. Southwestern Inst. of Physics, Chengdu (China)
  2. General Atomics, San Diego, CA (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. ITER Organization, St. Paul Lez Durance (France)
  5. Dalian Univ. of Technology, Dalian (China)
Publication Date:
Research Org.:
General Atomics, San Diego, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1608953
Alternate Identifier(s):
OSTI ID: 1616397
Report Number(s):
LLNL-JRNL-777062
Journal ID: ISSN 0029-5515
Grant/Contract Number:  
FC02-04ER54698; AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 60; Journal Issue: 4; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
detachment cliff; electric drift; carbon radiation; Physics - Plasma physics

Citation Formats

Du, Hailong, Zheng, Guoyao, Guo, Houyang, Jaervinen, Aaro E., Duan, Xuru, Bonnin, Xavier, Eldon, David, and Wang, Dezhen. SOLPS analysis of the necessary conditions for detachment cliff. United States: N. p., 2020. Web. doi:10.1088/1741-4326/ab77e6.
Du, Hailong, Zheng, Guoyao, Guo, Houyang, Jaervinen, Aaro E., Duan, Xuru, Bonnin, Xavier, Eldon, David, & Wang, Dezhen. SOLPS analysis of the necessary conditions for detachment cliff. United States. doi:https://doi.org/10.1088/1741-4326/ab77e6
Du, Hailong, Zheng, Guoyao, Guo, Houyang, Jaervinen, Aaro E., Duan, Xuru, Bonnin, Xavier, Eldon, David, and Wang, Dezhen. Mon . "SOLPS analysis of the necessary conditions for detachment cliff". United States. doi:https://doi.org/10.1088/1741-4326/ab77e6. https://www.osti.gov/servlets/purl/1608953.
@article{osti_1608953,
title = {SOLPS analysis of the necessary conditions for detachment cliff},
author = {Du, Hailong and Zheng, Guoyao and Guo, Houyang and Jaervinen, Aaro E. and Duan, Xuru and Bonnin, Xavier and Eldon, David and Wang, Dezhen},
abstractNote = {SOLPS modeling including full cross-filed drifts is used, for the first time, to reproduce the step-like detachment onset observed in the DIII-D tokamak previously simulated with UEDGE [Jaervinen A. E. et al., 2018 Phys. Rev. Lett.121 075001], and to further investigate the underlying physics processes. The SOLPS analysis reveals a strong interplay between the E×B drift-driven flows and carbon radiation in DIII-D. The modeling shows that the high confinement H-mode facilitates the formation of such a detachment cliff due to the narrow SOL width and hence steep radial gradients near the separatrix, which enhances the poloidal E×B drift. Furthermore, the SOLPS modeling indicates that carbon radiation also plays a key role in the formation of the detachment cliff in DIII-D without additional impurity seeding. These findings may have significant implications for the control and maintenance of divertor detachment for the steady-state operation of high-power fusion devices.},
doi = {10.1088/1741-4326/ab77e6},
journal = {Nuclear Fusion},
number = 4,
volume = 60,
place = {United States},
year = {2020},
month = {3}
}

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