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Title: Small angle slot divertor concept for long pulse advanced tokamaks

Abstract

SOLPS-EIRENE edge code analysis shows that a gas-tight slot divertor geometry with a small-angle (glancing-incidence) target, named the Small Angle Slot (SAS) divertor, can achieve cold, dissipative/detached divertor conditions at relatively low values of plasma density at the outside midplane separatrix. SAS exhibits the following key features: (1) strong enhancement of the buildup of neutral density in a localized region near the plasma strike point on the divertor target; (2) spreading of the cooling front across the divertor target with the slot gradually flaring out from the strike point, thus effectively reducing both heat flux and erosion on the entire divertor target surface. As a result, such a divertor may potentially provide a power and particle handling solution for long pulse advanced tokamaks.

Authors:
 [1];  [1];  [2];  [1];  [1];  [1]
  1. General Atomics, San Diego, CA (United States)
  2. Univ. of Toronto, Toronto, ON (Canada)
Publication Date:
Research Org.:
General Atomics, San Diego, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
OSTI Identifier:
1561846
Grant/Contract Number:  
FC02-04ER54698
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 57; Journal Issue: 4; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; divertor concept; plasma-material interactions; advanced tokamak; DIII-D; fusion reactor

Citation Formats

Guo, H. Y., Sang, C. F., Stangeby, P. C., Lao, L. L., Taylor, T. S., and Thomas, D. M. Small angle slot divertor concept for long pulse advanced tokamaks. United States: N. p., 2017. Web. doi:10.1088/1741-4326/aa5b46.
Guo, H. Y., Sang, C. F., Stangeby, P. C., Lao, L. L., Taylor, T. S., & Thomas, D. M. Small angle slot divertor concept for long pulse advanced tokamaks. United States. doi:10.1088/1741-4326/aa5b46.
Guo, H. Y., Sang, C. F., Stangeby, P. C., Lao, L. L., Taylor, T. S., and Thomas, D. M. Thu . "Small angle slot divertor concept for long pulse advanced tokamaks". United States. doi:10.1088/1741-4326/aa5b46. https://www.osti.gov/servlets/purl/1561846.
@article{osti_1561846,
title = {Small angle slot divertor concept for long pulse advanced tokamaks},
author = {Guo, H. Y. and Sang, C. F. and Stangeby, P. C. and Lao, L. L. and Taylor, T. S. and Thomas, D. M.},
abstractNote = {SOLPS-EIRENE edge code analysis shows that a gas-tight slot divertor geometry with a small-angle (glancing-incidence) target, named the Small Angle Slot (SAS) divertor, can achieve cold, dissipative/detached divertor conditions at relatively low values of plasma density at the outside midplane separatrix. SAS exhibits the following key features: (1) strong enhancement of the buildup of neutral density in a localized region near the plasma strike point on the divertor target; (2) spreading of the cooling front across the divertor target with the slot gradually flaring out from the strike point, thus effectively reducing both heat flux and erosion on the entire divertor target surface. As a result, such a divertor may potentially provide a power and particle handling solution for long pulse advanced tokamaks.},
doi = {10.1088/1741-4326/aa5b46},
journal = {Nuclear Fusion},
issn = {0029-5515},
number = 4,
volume = 57,
place = {United States},
year = {2017},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 16 works
Citation information provided by
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Figures / Tables:

Figure 1 Figure 1: Sketch of a SAS divertor on the DIII-D tokamak. The SAS concept was developed using the 2D plasma-fluid Monte-Carlo-neutral boundary plasma SOLPS-EINERE code package for typical H-mode plasmas in DIII-D.

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Works referenced in this record:

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.