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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - 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)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2017

Confidentiality

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

Name of the periodical

Nuclear Fusion

ISSN

0029-5515

e-ISSN

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Volume of the periodical

57

Issue of the periodical within the volume

2

Country of publishing house

AT - AUSTRIA

Number of pages

9

Pages from-to

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UT code for WoS article

000385668200009

EID of the result in the Scopus database

2-s2.0-85010992237