Impact of cross-field motion on ablation of high-Z dust in fusion edge plasmas
Abstract
The impact of cross-field motion of high-Z dust grains on their shielding by ablation cloud in edge plasmas of tokamaks is analyzed. The modification of the existing high-Z dust shielding theory is developed, which takes the dust motion effects into account. We show that the cross-field motion can lead to a large factor increase of the dust ablation rate, as compared to the previous model. It is also shown that the motion effects take place when the dust cross-field velocity exceeds a threshold value. We also obtain the dependencies of the dust ablation flux on the dust velocity and of the threshold velocity on the dust size and the ambient plasma temperature.
- Authors:
-
[1];
- Univ. of California, San Diego, CA (United States). Mechanical and Aerospace Engineering Dept.
- Publication Date:
- Research Org.:
- Univ. of California, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1367914
- Alternate Identifier(s):
- OSTI ID: 1367934
- Grant/Contract Number:
- FG02-06ER54852
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 24; Journal Issue: 7; 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
Smirnov, R. D., and Krasheninnikov, S. I. Impact of cross-field motion on ablation of high-Z dust in fusion edge plasmas. United States: N. p., 2017.
Web. doi:10.1063/1.4990434.
Smirnov, R. D., & Krasheninnikov, S. I. Impact of cross-field motion on ablation of high-Z dust in fusion edge plasmas. United States. https://doi.org/10.1063/1.4990434
Smirnov, R. D., and Krasheninnikov, S. I. Wed .
"Impact of cross-field motion on ablation of high-Z dust in fusion edge plasmas". United States. https://doi.org/10.1063/1.4990434. https://www.osti.gov/servlets/purl/1367914.
@article{osti_1367914,
title = {Impact of cross-field motion on ablation of high-Z dust in fusion edge plasmas},
author = {Smirnov, R. D. and Krasheninnikov, S. I.},
abstractNote = {The impact of cross-field motion of high-Z dust grains on their shielding by ablation cloud in edge plasmas of tokamaks is analyzed. The modification of the existing high-Z dust shielding theory is developed, which takes the dust motion effects into account. We show that the cross-field motion can lead to a large factor increase of the dust ablation rate, as compared to the previous model. It is also shown that the motion effects take place when the dust cross-field velocity exceeds a threshold value. We also obtain the dependencies of the dust ablation flux on the dust velocity and of the threshold velocity on the dust size and the ambient plasma temperature.},
doi = {10.1063/1.4990434},
journal = {Physics of Plasmas},
number = 7,
volume = 24,
place = {United States},
year = {Wed Jul 05 00:00:00 EDT 2017},
month = {Wed Jul 05 00:00:00 EDT 2017}
}
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