Enhanced performance in fusion plasmas through turbulence suppression by megaelectronvolt ions

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Enhanced performance in fusion plasmas through turbulence suppression by megaelectronvolt ions

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Enhanced performance in fusion plasmas through turbulence suppression by megaelectronvolt ions

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

NATURE PHYSICS

ISSN

1745-2473

e-ISSN

1745-2481

Svazek periodika

18

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

776-782

Kód UT WoS článku

000819301800001

EID výsledku v databázi Scopus

2-s2.0-85133752418