Enhanced performance in fusion plasmas through turbulence suppression by megaelectronvolt ions
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F22%3A00373988" target="_blank" >RIV/68407700:21340/22:00373988 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1038/s41567-022-01626-8" target="_blank" >https://doi.org/10.1038/s41567-022-01626-8</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41567-022-01626-8" target="_blank" >10.1038/s41567-022-01626-8</a>
Alternative languages
Result language
angličtina
Original language name
Enhanced performance in fusion plasmas through turbulence suppression by megaelectronvolt ions
Original language description
Alpha particles with energies on the order of megaelectronvolts will be the main source of plasma heating in future magnetic confinement fusion reactors. Instead of heating fuel ions, most of the energy of alpha particles is transferred to electrons in the plasma. Furthermore, alpha particles can also excite Alfvenic instabilities, which were previously considered to be detrimental to the performance of the fusion device. Here we report improved thermal ion confinement in the presence of megaelectronvolts ions and strong fast ion-driven Alfvenic instabilities in recent experiments on the Joint European Torus. Detailed transport analysis of these experiments reveals turbulence suppression through a complex multi-scale mechanism that generates large-scale zonal flows. This holds promise for more economical operation of fusion reactors with dominant alpha particle heating and ultimately cheaper fusion electricity.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
NATURE PHYSICS
ISSN
1745-2473
e-ISSN
1745-2481
Volume of the periodical
18
Issue of the periodical within the volume
7
Country of publishing house
GB - UNITED KINGDOM
Number of pages
7
Pages from-to
776-782
UT code for WoS article
000819301800001
EID of the result in the Scopus database
2-s2.0-85133752418