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First numerical ana...
First numerical analysis of runaway electron generation in tungsten-rich plasmas towards ITER
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- Walkowiak, J. (författare)
- Polish Acad Sci, Inst Nucl Phys, PL-31342, Krakow, Poland.;Natl Ctr Nucl Res NCBJ, 7 Andrzeja Soltana Str, PL-05400 Otwock, Poland.,Polish Academy of Sciences,Narodowe Centrum Badań Jądrowych (NCB),National Centre for Nuclear Research (NCB)
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- Hoppe, Mathias (författare)
- KTH,Elektroteknik,Kungliga Tekniska Högskolan (KTH),Royal Institute of Technology (KTH)
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- Ekmark, Ida, 1998 (författare)
- Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden.,Chalmers tekniska högskola,Chalmers University of Technology
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- Jardin, A. (författare)
- Polish Acad Sci, Inst Nucl Phys, PL-31342, Krakow, Poland.,Polish Academy of Sciences
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- Bielecki, J. (författare)
- Polish Acad Sci, Inst Nucl Phys, PL-31342, Krakow, Poland.,Polish Academy of Sciences
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- Krol, K. (författare)
- Polish Acad Sci, Inst Nucl Phys, PL-31342, Krakow, Poland.,Polish Academy of Sciences
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- Savoye-Peysson, Y. (författare)
- CEA, IRFM, F-13108 St Paul Les Durance, France.,Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA),The French Alternative Energies and Atomic Energy Commission (CEA)
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- Mazon, D. (författare)
- CEA, IRFM, F-13108 St Paul Les Durance, France.,Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA),The French Alternative Energies and Atomic Energy Commission (CEA)
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- Dworak, D. (författare)
- Polish Acad Sci, Inst Nucl Phys, PL-31342, Krakow, Poland.,Polish Academy of Sciences
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- Scholz, M. (författare)
- Polish Acad Sci, Inst Nucl Phys, PL-31342, Krakow, Poland.,Polish Academy of Sciences
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Polish Acad Sci, Inst Nucl Phys, PL-31342, Krakow, Poland;Natl Ctr Nucl Res NCBJ, 7 Andrzeja Soltana Str, PL-05400 Otwock, Poland. Polish Academy of Sciences (creator_code:org_t)
- IOP Publishing, 2024
- 2024
- Engelska.
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Ingår i: Nuclear Fusion. - : IOP Publishing. - 0029-5515 .- 1741-4326. ; 64:3
- Relaterad länk:
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https://doi.org/10.1...
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https://research.cha... (primary) (free)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- The disruption and runaway electron analysis model code was extended to include tungsten impurities in disruption simulations with the aim of studying the runaway electron (RE) generation. This study investigates RE current sensitivity on the following plasma parameters and modelling choices: tungsten concentration, magnetic perturbation strength, electron modelling, thermal quench time and tokamak geometry-ITER-like or ASDEX-like. Our investigation shows that a tungsten concentration below 10-3 does not cause significant RE generation on its own. However, at higher concentrations it is possible to reach a very high RE current. Out of the two tested models of electrons in plasma: fluid and isotropic (kinetic), results from the fluid model are more conservative, which is useful when it comes to safety analysis. However, these results are overly pessimistic when compared to the isotropic model, which is based on a more reliable approach. Our results also show that the hot-tail RE generation mechanism is dominant as a primary source of RE in tungsten induced disruptions, usually providing orders of magnitude higher RE seed than Dreicer generation. We discuss best practices for simulations with tungsten-rich plasma, present the dependence of the safety limits on modelling choices and highlight the biggest shortcoming of the current simulation techniques. The obtained results pave the way for a wider analysis of tungsten impact on the disruption dynamics, including the mitigation techniques for ITER in the case of strong contamination of the plasma with tungsten.
Ämnesord
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Nyckelord
- runaway electrons
- tungsten impurities
- ITER
- computational plasma physics
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Walkowiak, J.
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Hoppe, Mathias
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Ekmark, Ida, 199 ...
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Jardin, A.
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Bielecki, J.
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Krol, K.
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Savoye-Peysson, ...
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Mazon, D.
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Dworak, D.
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Scholz, M.
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Nuclear Fusion
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Kungliga Tekniska Högskolan
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