Pellet sublimation and expansion under runaway electron flux
Abstract
This work provides a qualitative description of the pellet response to the ambient runaway electrons. For ITER-relevant parameters, our estimates suggest that the cryogenic pellets will be sublimated instantly at the edge of the runaway beam. The subsequent rapid expansion of the sublimated material spreads the impurities over the poloidal cross-section of a tokamak on a millisecond time scale prior to the complete ionization of the expanding cloud. Here, the injected solid pellet turns into a rapidly expanding gas cloud before it reaches the core of the runaway beam. As a result, the pellet acts similar to the massive gas injection.
- Authors:
-
- Univ. of Texas, Austin, TX (United States); National Research Centre Kurchatov Inst., Moscow (Russia)
- Univ. of Texas, Austin, TX (United States)
- Publication Date:
- Research Org.:
- Univ. of Texas, Austin, TX (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1785225
- Alternate Identifier(s):
- OSTI ID: 1638540
- Grant/Contract Number:
- FG02-04ER54742; SC0016283; DEFG02-04ER54742; DESC0016283
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Fusion
- Additional Journal Information:
- Journal Volume: 60; Journal Issue: 8; Journal ID: ISSN 0029-5515
- Publisher:
- IOP Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Kiramov, Dmitrii I., and Breizman, Boris N. Pellet sublimation and expansion under runaway electron flux. United States: N. p., 2020.
Web. doi:10.1088/1741-4326/ab966a.
Kiramov, Dmitrii I., & Breizman, Boris N. Pellet sublimation and expansion under runaway electron flux. United States. https://doi.org/10.1088/1741-4326/ab966a
Kiramov, Dmitrii I., and Breizman, Boris N. Wed .
"Pellet sublimation and expansion under runaway electron flux". United States. https://doi.org/10.1088/1741-4326/ab966a. https://www.osti.gov/servlets/purl/1785225.
@article{osti_1785225,
title = {Pellet sublimation and expansion under runaway electron flux},
author = {Kiramov, Dmitrii I. and Breizman, Boris N.},
abstractNote = {This work provides a qualitative description of the pellet response to the ambient runaway electrons. For ITER-relevant parameters, our estimates suggest that the cryogenic pellets will be sublimated instantly at the edge of the runaway beam. The subsequent rapid expansion of the sublimated material spreads the impurities over the poloidal cross-section of a tokamak on a millisecond time scale prior to the complete ionization of the expanding cloud. Here, the injected solid pellet turns into a rapidly expanding gas cloud before it reaches the core of the runaway beam. As a result, the pellet acts similar to the massive gas injection.},
doi = {10.1088/1741-4326/ab966a},
journal = {Nuclear Fusion},
number = 8,
volume = 60,
place = {United States},
year = {Wed Jul 15 00:00:00 EDT 2020},
month = {Wed Jul 15 00:00:00 EDT 2020}
}
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