Fast measurements of the electron temperature and parallel heat flux in ELMy H-mode on the COMPASS tokamak

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F17%3A00474219" target="_blank" >RIV/61389021:_____/17:00474219 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/0029-5515/57/2/022010" target="_blank" >http://dx.doi.org/10.1088/0029-5515/57/2/022010</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0029-5515/57/2/022010" target="_blank" >10.1088/0029-5515/57/2/022010</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Fast measurements of the electron temperature and parallel heat flux in ELMy H-mode on the COMPASS tokamak

Popis výsledku v původním jazyce

We report the latest results on fast measurements of the electron temperature and parallel heat flux in the COMPASS tokamak scrape-off layer (SOL) and divertor region during ELMy H-mode plasmas. The system of ball-pen and Langmuir probes installed on the divertor target, the horizontal reciprocating manipulator and the fast data-acquisition system with sampling frequency rate f = 5 MSa s(-1) allow us to measure the electron temperature and parallel heat flux during inter-ELM and ELM periods with high temporal resolution. The filamentary structure of the electron temperature and parallel heat flux was observed during ELMs in the SOL as well as in the divertor region. The position of the filaments within ELMs is not regular and therefore the resulting conditionally averaged ELM neglects the peak values of the electron temperature and parallel heat flux. We have found a substantial difference between the value of the radial power decay length in the inter-ELM period lambda(q,inter) = 2.5 mm and the decay length of the peak ELM heat flux lambda(q,ELM) = 13.1 mm. The decay length of the ELM energy density was found to be lambda(E,ELM) = 5.4 mm.

Název v anglickém jazyce

Fast measurements of the electron temperature and parallel heat flux in ELMy H-mode on the COMPASS tokamak

Popis výsledku anglicky

We report the latest results on fast measurements of the electron temperature and parallel heat flux in the COMPASS tokamak scrape-off layer (SOL) and divertor region during ELMy H-mode plasmas. The system of ball-pen and Langmuir probes installed on the divertor target, the horizontal reciprocating manipulator and the fast data-acquisition system with sampling frequency rate f = 5 MSa s(-1) allow us to measure the electron temperature and parallel heat flux during inter-ELM and ELM periods with high temporal resolution. The filamentary structure of the electron temperature and parallel heat flux was observed during ELMs in the SOL as well as in the divertor region. The position of the filaments within ELMs is not regular and therefore the resulting conditionally averaged ELM neglects the peak values of the electron temperature and parallel heat flux. We have found a substantial difference between the value of the radial power decay length in the inter-ELM period lambda(q,inter) = 2.5 mm and the decay length of the peak ELM heat flux lambda(q,ELM) = 13.1 mm. The decay length of the ELM energy density was found to be lambda(E,ELM) = 5.4 mm.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

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

—

Svazek periodika

57

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

AT - Rakouská republika

Počet stran výsledku

9

Strana od-do

—

Kód UT WoS článku

000385668200009

EID výsledku v databázi Scopus

2-s2.0-85010992237