Simulation of MHD instabilities with fluid runaway electron model in M3D-C1
Abstract
Runaway electrons are generated in a tokamak during the start up, during normal operation and during a plasma disruption. During a disruption, runaway electrons can be accelerated to high energies, potentially damaging the first wall. To predict the consequences of runaway generation during a disruption, it is necessary to consider resonant interactions of runaways with the bulk plasma. Here we consider the interactions of runaways on low mode number tearing modes. We have developed a fluid runaway electron model for the 3D MHD code M3D-C1[Jardin,et al. J Comput. Sci Discovery 6 014002 (2012)]. To benchmark, we have reproduced the MHD linear tearing mode results (with runaway electrons) in a circular cylinder presented in previous analytic studies[[Helander, P., et al, Phys. Plasmas 14 144102 (2007)] and extended here with a numerical eigenvalue calculation. Furthermore, we find that the low mode number tearing mode has a rotation caused by the MHD - runaways interaction, and the toroidal current scale length is much smaller with runaways than that for without and decreases as the runaway speed increases.
- Authors:
-
- 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:
- 1642436
- Alternate Identifier(s):
- OSTI ID: 1690314
- Grant/Contract Number:
- AC02-09CH11466
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Fusion
- Additional Journal Information:
- Journal Name: Nuclear Fusion; Journal ID: ISSN 0029-5515
- Publisher:
- IOP Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Zhao, Chen, Liu, Chang, Jardin, Stephen C., and Ferraro, N. Simulation of MHD instabilities with fluid runaway electron model in M3D-C1. United States: N. p., 2020.
Web. doi:10.1088/1741-4326/ab96f4.
Zhao, Chen, Liu, Chang, Jardin, Stephen C., & Ferraro, N. Simulation of MHD instabilities with fluid runaway electron model in M3D-C1. United States. https://doi.org/10.1088/1741-4326/ab96f4
Zhao, Chen, Liu, Chang, Jardin, Stephen C., and Ferraro, N. Wed .
"Simulation of MHD instabilities with fluid runaway electron model in M3D-C1". United States. https://doi.org/10.1088/1741-4326/ab96f4. https://www.osti.gov/servlets/purl/1642436.
@article{osti_1642436,
title = {Simulation of MHD instabilities with fluid runaway electron model in M3D-C1},
author = {Zhao, Chen and Liu, Chang and Jardin, Stephen C. and Ferraro, N},
abstractNote = {Runaway electrons are generated in a tokamak during the start up, during normal operation and during a plasma disruption. During a disruption, runaway electrons can be accelerated to high energies, potentially damaging the first wall. To predict the consequences of runaway generation during a disruption, it is necessary to consider resonant interactions of runaways with the bulk plasma. Here we consider the interactions of runaways on low mode number tearing modes. We have developed a fluid runaway electron model for the 3D MHD code M3D-C1[Jardin,et al. J Comput. Sci Discovery 6 014002 (2012)]. To benchmark, we have reproduced the MHD linear tearing mode results (with runaway electrons) in a circular cylinder presented in previous analytic studies[[Helander, P., et al, Phys. Plasmas 14 144102 (2007)] and extended here with a numerical eigenvalue calculation. Furthermore, we find that the low mode number tearing mode has a rotation caused by the MHD - runaways interaction, and the toroidal current scale length is much smaller with runaways than that for without and decreases as the runaway speed increases.},
doi = {10.1088/1741-4326/ab96f4},
journal = {Nuclear Fusion},
number = ,
volume = ,
place = {United States},
year = {Wed May 27 00:00:00 EDT 2020},
month = {Wed May 27 00:00:00 EDT 2020}
}
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