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Title: Dynamic modeling of plasma-vapor interactions during plasma disruptions

Abstract

Intense deposition of energy in short times on fusion reactor components during a plasma disruption may cause severe surface erosion due to ablation of these components. The exact amount of the eroded material is very important to the reactor design and its lifetime. During the plasma deposition, the vaporized wall material will interact with the incoming plasma particles and may shield the rest of the wall from damage. The vapor shielding may then prolong the lifetime of these components and increase the reactor duty cycle. To correctly evaluate the impact of vapor shielding effect a comprehensive model is developed. In this model the dynamic slowing down of the plasma particles, both ions and electrons, with the eroded wall material is established. Different interaction processes between the plasma particles and the ablated material is included. The generated photons radiation source and the transport of this radiation through the vapor to the wall is modeled. Recent experimental data on disruptions is analyzed and compared with model predictions. Vapor shielding may be effective in reducing the overall erosion rate for certain plasma disruption parameters and conditions.

Authors:
;
Publication Date:
Research Org.:
Argonne National Lab., IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10155013
Report Number(s):
ANL/CP-74880; CONF-920311-18
ON: DE92016183
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: 10. international conference on plasma-surface interactions in controlled fusion devices,Monterey, CA (United States),30 Mar - 3 Apr 1992; Other Information: PBD: May 1992
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; THERMONUCLEAR REACTOR MATERIALS; EROSION; FIRST WALL; SHIELDING; PLASMA DISRUPTION; DESIGN; STOPPING POWER; RADIATION TRANSPORT; VAPORS; 700420; PLASMA-FACING COMPONENTS

Citation Formats

Hassanein, A, and Ehst, D A. Dynamic modeling of plasma-vapor interactions during plasma disruptions. United States: N. p., 1992. Web.
Hassanein, A, & Ehst, D A. Dynamic modeling of plasma-vapor interactions during plasma disruptions. United States.
Hassanein, A, and Ehst, D A. 1992. "Dynamic modeling of plasma-vapor interactions during plasma disruptions". United States. https://www.osti.gov/servlets/purl/10155013.
@article{osti_10155013,
title = {Dynamic modeling of plasma-vapor interactions during plasma disruptions},
author = {Hassanein, A and Ehst, D A},
abstractNote = {Intense deposition of energy in short times on fusion reactor components during a plasma disruption may cause severe surface erosion due to ablation of these components. The exact amount of the eroded material is very important to the reactor design and its lifetime. During the plasma deposition, the vaporized wall material will interact with the incoming plasma particles and may shield the rest of the wall from damage. The vapor shielding may then prolong the lifetime of these components and increase the reactor duty cycle. To correctly evaluate the impact of vapor shielding effect a comprehensive model is developed. In this model the dynamic slowing down of the plasma particles, both ions and electrons, with the eroded wall material is established. Different interaction processes between the plasma particles and the ablated material is included. The generated photons radiation source and the transport of this radiation through the vapor to the wall is modeled. Recent experimental data on disruptions is analyzed and compared with model predictions. Vapor shielding may be effective in reducing the overall erosion rate for certain plasma disruption parameters and conditions.},
doi = {},
url = {https://www.osti.gov/biblio/10155013}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri May 01 00:00:00 EDT 1992},
month = {Fri May 01 00:00:00 EDT 1992}
}

Conference:
Other availability
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