First results from EBW emission diagnostics on COMPASS

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F12%3A00381973" target="_blank" >RIV/61389021:_____/12:00381973 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1063/1.4733530" target="_blank" >http://dx.doi.org/10.1063/1.4733530</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.4733530" target="_blank" >10.1063/1.4733530</a>

Result language

angličtina

Original language name

First results from EBW emission diagnostics on COMPASS

Original language description

COMPASS tokamak shots at low magnetic field feature overdense plasmas during the extended current flat-top phase. The first harmonic of the electron cyclotron emission is completely cutoff for O and X modes and so the emission caused by electron Bernstein waves (EBWs) propagating obliquely with respect to the magnetic field and undergoing so called EBW-X-O conversion process can be observed. We perform an angular scan of the EBW emission during a set of comparable shots in order to determine the optimumantenna direction. A weak dependence of the radiative temperature on the antenna angles indicates an influence of multiple reflections from the vessel wall. The low temperature at the mode conversion region is responsible for the collisional damping ofEBW, which can explain several times lower measured radiative temperature than the electron temperature measured by the Thomson scattering system.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BL - Plasma physics and discharge through gases

OECD FORD branch

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Project

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

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2012

Confidentiality

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

Name of the periodical

Review of Scientific Instruments

ISSN

0034-6748

e-ISSN

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Volume of the periodical

83

Issue of the periodical within the volume

10

Country of publishing house

US - UNITED STATES

Number of pages

3

Pages from-to

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UT code for WoS article

000311562900174

EID of the result in the Scopus database

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