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Title: Vertical forces during vertical displacement events in an ITER plasma and the role of halo currents

Abstract

Vertical displacement events (VDEs) can occur in elongated tokamaks causing large currents to flow in the vessel and other adjacent metallic structures. To better understand the potential magnitude of the associated forces and the role of the so called \halo currents" on them, we have used the M3D-C1 code to simulate potential VDEs in ITER. We used actual values for the vessel resistivity and prequench temperatures and, unlike most of the previous studies, the halo region is naturally formed by triggering the thermal quench with an increase in the plasma thermal conductivity. We used the 2D non-linear version of the code and vary the post-thermal quench thermal conductivity profile as well as the boundary temperature in order to generate a wide range of possible cases that could occur in the experiment. We also show that, for a similar condition, increasing the halo current does not increase the total force on the wall since it is offset by a decrease in the toroidal contribution.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1573483
Grant/Contract Number:  
AC02-09CH11466; SciDAC CTTS
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 59; Journal Issue: 12; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Clauser, C. F., Jardin, S. C., and Ferraro, N. M. Vertical forces during vertical displacement events in an ITER plasma and the role of halo currents. United States: N. p., 2019. Web. doi:10.1088/1741-4326/ab440a.
Clauser, C. F., Jardin, S. C., & Ferraro, N. M. Vertical forces during vertical displacement events in an ITER plasma and the role of halo currents. United States. doi:10.1088/1741-4326/ab440a.
Clauser, C. F., Jardin, S. C., and Ferraro, N. M. Wed . "Vertical forces during vertical displacement events in an ITER plasma and the role of halo currents". United States. doi:10.1088/1741-4326/ab440a.
@article{osti_1573483,
title = {Vertical forces during vertical displacement events in an ITER plasma and the role of halo currents},
author = {Clauser, C. F. and Jardin, S. C. and Ferraro, N. M.},
abstractNote = {Vertical displacement events (VDEs) can occur in elongated tokamaks causing large currents to flow in the vessel and other adjacent metallic structures. To better understand the potential magnitude of the associated forces and the role of the so called \halo currents" on them, we have used the M3D-C1 code to simulate potential VDEs in ITER. We used actual values for the vessel resistivity and prequench temperatures and, unlike most of the previous studies, the halo region is naturally formed by triggering the thermal quench with an increase in the plasma thermal conductivity. We used the 2D non-linear version of the code and vary the post-thermal quench thermal conductivity profile as well as the boundary temperature in order to generate a wide range of possible cases that could occur in the experiment. We also show that, for a similar condition, increasing the halo current does not increase the total force on the wall since it is offset by a decrease in the toroidal contribution.},
doi = {10.1088/1741-4326/ab440a},
journal = {Nuclear Fusion},
number = 12,
volume = 59,
place = {United States},
year = {2019},
month = {10}
}

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