Pellet sublimation and expansion under runaway electron flux

Kiramov, Dmitrii I.; Breizman, Boris N.

doi:10.1088/1741-4326/ab966a

Title: 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:

^[1];

^[2]

Univ. of Texas, Austin, TX (United States); National Research Centre Kurchatov Inst., Moscow (Russia)
Univ. of Texas, Austin, TX (United States)

Publication Date:: Wed Jul 15 00:00:00 EDT 2020

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.

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                    Kiramov, Dmitrii I., & Breizman, Boris N. Pellet sublimation and expansion under runaway electron flux.  United States.  https://doi.org/10.1088/1741-4326/ab966a

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                    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.

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@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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Works referenced in this record:

On the ablation models of fuel pellets
journal, December 2005

Rozhansky, V. A.; Senichenkov, I. Yu.
Plasma Physics Reports, Vol. 31, Issue 12
DOI: 10.1134/1.2147645

Control and dissipation of runaway electron beams created during rapid shutdown experiments in DIII-D
journal, July 2013

Hollmann, E. M.; Austin, M. E.; Boedo, J. A.
Nuclear Fusion, Vol. 53, Issue 8
DOI: 10.1088/0029-5515/53/8/083004

Heating and ablation of high- Z cryogenic pellets in high temperature plasmas
journal, July 2019

Fontanilla, Adrian K.; Breizman, Boris N.
Nuclear Fusion, Vol. 59, Issue 9
DOI: 10.1088/1741-4326/ab2bd6

Disruption Mitigation System Developments and Design for ITER
journal, September 2015

Baylor, L. R.; Barbier, C. C.; Carmichael, J. R.
Fusion Science and Technology, Vol. 68, Issue 2
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Disruption mitigation by injection of small quantities of noble gas in ASDEX Upgrade
journal, November 2016

Pautasso, G.; Bernert, M.; Dibon, M.
Plasma Physics and Controlled Fusion, Vol. 59, Issue 1
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Runaway electrons and the evolution of the plasma current in tokamak disruptions
journal, October 2006

Smith, H.; Helander, P.; Eriksson, L. -G.
Physics of Plasmas, Vol. 13, Issue 10
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Marginal stability model for the decay of runaway electron current
journal, April 2014

Breizman, Boris N.
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Chapter 3: MHD stability, operational limits and disruptions
journal, June 2007

Hender, T. C.; Wesley, J. C.; Bialek, J.
Nuclear Fusion, Vol. 47, Issue 6
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Physics of runaway electrons in tokamaks
journal, June 2019

Breizman, Boris N.; Aleynikov, Pavel; Hollmann, Eric M.
Nuclear Fusion, Vol. 59, Issue 8
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Dissipation of post-disruption runaway electron plateaus by shattered pellet injection in DIII-D
journal, March 2018

Shiraki, D.; Commaux, N.; Baylor, L. R.
Nuclear Fusion, Vol. 58, Issue 5
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Disruptions in ITER and strategies for their control and mitigation
journal, August 2015

Lehnen, M.; Aleynikova, K.; Aleynikov, P. B.
Journal of Nuclear Materials, Vol. 463
DOI: 10.1016/j.jnucmat.2014.10.075

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Similar Records

Title: Pellet sublimation and expansion under runaway electron flux

Abstract

Citation Formats

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