skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Modeling of rapid shutdown in the DIII-D tokamak by core deposition of high-Z material

Abstract

MHD modeling of shell-pellet injection for disruption mitigation is carried out under the assumption of idealized delivery of the radiating payload to the core, neglecting the physics of shell ablation. The shell pellet method is designed to produce an inside-out thermal quench in which core thermal heat is radiated while outer flux surfaces remain intact, protecting the divertor from large conducted heat loads. In the simulation, good outer surfaces remain until the thermal quench is nearly complete, and a high radiated energy fraction is achieved. As a result, when the outermost surfaces are destroyed, runaway electron test orbits indicate that the rate of runaway electron loss is very fast compared with prior massive gas injection simulations, which is attributed to the very different current profile evolution that occurs with central cooling.

Authors:
ORCiD logo [1]; ORCiD logo [2]
  1. Univ. of California, San Diego, CA (United States)
  2. General Atomics, San Diego, CA (United States)
Publication Date:
Research Org.:
General Atomics, San Diego, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1374044
Alternate Identifier(s):
OSTI ID: 1365433
Grant/Contract Number:
FC02-04ER54698; AC02-05CH11231; FG02-95ER54309; SC0015499; SC0016420
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 6; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Izzo, Valerie A., and Parks, Paul B. Modeling of rapid shutdown in the DIII-D tokamak by core deposition of high-Z material. United States: N. p., 2017. Web. doi:10.1063/1.4990447.
Izzo, Valerie A., & Parks, Paul B. Modeling of rapid shutdown in the DIII-D tokamak by core deposition of high-Z material. United States. doi:10.1063/1.4990447.
Izzo, Valerie A., and Parks, Paul B. Thu . "Modeling of rapid shutdown in the DIII-D tokamak by core deposition of high-Z material". United States. doi:10.1063/1.4990447. https://www.osti.gov/servlets/purl/1374044.
@article{osti_1374044,
title = {Modeling of rapid shutdown in the DIII-D tokamak by core deposition of high-Z material},
author = {Izzo, Valerie A. and Parks, Paul B.},
abstractNote = {MHD modeling of shell-pellet injection for disruption mitigation is carried out under the assumption of idealized delivery of the radiating payload to the core, neglecting the physics of shell ablation. The shell pellet method is designed to produce an inside-out thermal quench in which core thermal heat is radiated while outer flux surfaces remain intact, protecting the divertor from large conducted heat loads. In the simulation, good outer surfaces remain until the thermal quench is nearly complete, and a high radiated energy fraction is achieved. As a result, when the outermost surfaces are destroyed, runaway electron test orbits indicate that the rate of runaway electron loss is very fast compared with prior massive gas injection simulations, which is attributed to the very different current profile evolution that occurs with central cooling.},
doi = {10.1063/1.4990447},
journal = {Physics of Plasmas},
number = 6,
volume = 24,
place = {United States},
year = {Thu Jun 22 00:00:00 EDT 2017},
month = {Thu Jun 22 00:00:00 EDT 2017}
}

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

Citation Metrics:
Cited by: 1work
Citation information provided by
Web of Science

Save / Share: