UEDGE modelling of detached divertor operation for long-leg divertor geometries in ARC
Abstract
In this work, simulations of the ARC scrape-off layer and divertor configuration are carried out using UEDGE to perform the first power-handling assessment for the divertor design. A convective–diffusive anomalous transport model is implemented in the code to reproduce the radial plasma profiles anticipated for the device at the outer mid-plane. Levels of exhaust power from the core are varied, and a 0.5% fixed fraction neon impurity seeding is included in investigations to find steady-state detached solutions. Initial studies employing a super-X divertor configuration have shown that a stable detached divertor-operational window exists for reactor exhaust powers in the range of 72–92 MW, which is close to projected levels of exhaust power of 105 MW across the separatrix anticipated for ARC. Under these conditions, the divertor heat flux is fully dissipated by radiation and radial losses to the sidewalls of the divertor channel, leading to acceptable levels of power flux density on plasma-facing components. Simulations are being extended to study the performance of the X-point target geometry and to explore the sensitivity to the physics model and input parameters.
- Authors:
-
[1];
- Univ. of York (United Kingdom)
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); Engineering and Physical Sciences Research Council (EPSRC)
- OSTI Identifier:
- 1822620
- Report Number(s):
- LLNL-JRNL-777445
Journal ID: ISSN 0863-1042; 969847; TRN: US2214493
- Grant/Contract Number:
- AC52-07NA27344; EP/LO1663X/1
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Contributions to Plasma Physics
- Additional Journal Information:
- Journal Volume: 58; Journal Issue: 6-8; Journal ID: ISSN 0863-1042
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ARC; detached; divertor; power handling; UEDGE
Citation Formats
Wigram, M., LaBombard, B., Umansky, M. V., Kuang, A. Q., Brunner, D., Terry, J. L., Golfinopoulos, T., Rensink, M. E., and Whyte, D. G. UEDGE modelling of detached divertor operation for long-leg divertor geometries in ARC. United States: N. p., 2018.
Web. doi:10.1002/ctpp.201700178.
Wigram, M., LaBombard, B., Umansky, M. V., Kuang, A. Q., Brunner, D., Terry, J. L., Golfinopoulos, T., Rensink, M. E., & Whyte, D. G. UEDGE modelling of detached divertor operation for long-leg divertor geometries in ARC. United States. https://doi.org/10.1002/ctpp.201700178
Wigram, M., LaBombard, B., Umansky, M. V., Kuang, A. Q., Brunner, D., Terry, J. L., Golfinopoulos, T., Rensink, M. E., and Whyte, D. G. Fri .
"UEDGE modelling of detached divertor operation for long-leg divertor geometries in ARC". United States. https://doi.org/10.1002/ctpp.201700178. https://www.osti.gov/servlets/purl/1822620.
@article{osti_1822620,
title = {UEDGE modelling of detached divertor operation for long-leg divertor geometries in ARC},
author = {Wigram, M. and LaBombard, B. and Umansky, M. V. and Kuang, A. Q. and Brunner, D. and Terry, J. L. and Golfinopoulos, T. and Rensink, M. E. and Whyte, D. G.},
abstractNote = {In this work, simulations of the ARC scrape-off layer and divertor configuration are carried out using UEDGE to perform the first power-handling assessment for the divertor design. A convective–diffusive anomalous transport model is implemented in the code to reproduce the radial plasma profiles anticipated for the device at the outer mid-plane. Levels of exhaust power from the core are varied, and a 0.5% fixed fraction neon impurity seeding is included in investigations to find steady-state detached solutions. Initial studies employing a super-X divertor configuration have shown that a stable detached divertor-operational window exists for reactor exhaust powers in the range of 72–92 MW, which is close to projected levels of exhaust power of 105 MW across the separatrix anticipated for ARC. Under these conditions, the divertor heat flux is fully dissipated by radiation and radial losses to the sidewalls of the divertor channel, leading to acceptable levels of power flux density on plasma-facing components. Simulations are being extended to study the performance of the X-point target geometry and to explore the sensitivity to the physics model and input parameters.},
doi = {10.1002/ctpp.201700178},
journal = {Contributions to Plasma Physics},
number = 6-8,
volume = 58,
place = {United States},
year = {Fri Mar 02 00:00:00 EST 2018},
month = {Fri Mar 02 00:00:00 EST 2018}
}
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Works referencing / citing this record:
Performance assessment of long-legged tightly-baffled divertor geometries in the ARC reactor concept
journal, September 2019
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