Physics of the creation and mitigation of runaway electron beams in presence of their background plasma.

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F17%3A00482605" target="_blank" >RIV/61389021:_____/17:00482605 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Physics of the creation and mitigation of runaway electron beams in presence of their background plasma.
Original language description
Disruptions are a threat for the reliable operation of future tokamaks including ITER. Among other consequences, they can convert a significant fraction of the plasma current into Runaway Electrons (REs) in the MeV range. The possibility to suppress a runaway beam once it has been accelerated remains uncertain. Previous experiments at JET have shown that the suppressionnof a 750 kA runaway beam using massive gas injection was inefficient [1]. This situation contrasts with results of smaller tokamaks such as DIII-D[2], Asdex-Upgrade[3], TCV[4] and Tore Supra[5]. A number of explanations have been brought forward to explain the inefficiency: a gas plume geometry effect, a runaway current screening effect or the shielding by the cold backgroundnplasma coexisting with the runaway beam. This background plasma has already been observed on several machines[2, 5], but gaps remain in the understanding of its physics. The present paper reviews the three latter possible explanations and the interaction between REs, the background plasma and the mitigation gas.
Czech name
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Czech description
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
EPS 2017: 44th European Physical Society Conference on Plasma Physics
ISBN
979-10-96389-07
ISSN
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e-ISSN
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Number of pages
4
Pages from-to
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Publisher name
European Physical Society
Place of publication
Mulhouse
Event location
Belfast
Event date
Jun 26, 2017
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
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