Spontaneous formation of a transport barrier in helium plasma in a tokamak with circular configuration

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F23%3A00581965" target="_blank" >RIV/61389021:_____/23:00581965 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/23:00369025

Výsledek na webu

<a href="https://iopscience.iop.org/article/10.1088/1741-4326/acf1af" target="_blank" >https://iopscience.iop.org/article/10.1088/1741-4326/acf1af</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1741-4326/acf1af" target="_blank" >10.1088/1741-4326/acf1af</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Spontaneous formation of a transport barrier in helium plasma in a tokamak with circular configuration

Popis výsledku v původním jazyce

We report on the first experimental observation of a spontaneously formed transport barrier in the tokamak with a circular configuration in helium plasmas. There was no external polarization of the plasma by electric field or other technique to form the barrier as it is typically used in tokamaks with circular plasma. In general, the transport barriers play an important role in plasma confinement especially in tokamaks with divertor configuration. In our experiments, we clearly observe distinct characteristics of a transport barrier, including a steep gradient of the electron temperature and an enhanced radial electric field along with the change in the plasma potential, floating potential, and electron temperature fluctuation. The electron temperature and the plasma potential are obtained by a combination of the ball-pen and Langmuir probe measurements with high temporal resolution on a shot-to-shot basis. This first experimental observation of the spontaneously formed transport barrier might bring new possibilities to obtain a fusion-relevant study of the edge plasma parameters and transport in helium plasmas even on small tokamaks.

Název v anglickém jazyce

Spontaneous formation of a transport barrier in helium plasma in a tokamak with circular configuration

Popis výsledku anglicky

We report on the first experimental observation of a spontaneously formed transport barrier in the tokamak with a circular configuration in helium plasmas. There was no external polarization of the plasma by electric field or other technique to form the barrier as it is typically used in tokamaks with circular plasma. In general, the transport barriers play an important role in plasma confinement especially in tokamaks with divertor configuration. In our experiments, we clearly observe distinct characteristics of a transport barrier, including a steep gradient of the electron temperature and an enhanced radial electric field along with the change in the plasma potential, floating potential, and electron temperature fluctuation. The electron temperature and the plasma potential are obtained by a combination of the ball-pen and Langmuir probe measurements with high temporal resolution on a shot-to-shot basis. This first experimental observation of the spontaneously formed transport barrier might bring new possibilities to obtain a fusion-relevant study of the edge plasma parameters and transport in helium plasmas even on small tokamaks.

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

<a href="/cs/project/LM2023045" target="_blank" >LM2023045: COMPASS – Tokamak pro výzkum termonukleární fúze</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Nuclear Fusion

ISSN

0029-5515

e-ISSN

1741-4326

Svazek periodika

63

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

104003

Kód UT WoS článku

001060022500001

EID výsledku v databázi Scopus

2-s2.0-85170821128