About: First results from EBW emission diagnostics on COMPASS

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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 optimum antenna 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 of EBW, which can explain several times lower measured radiative temperature than the electron temperature measured by the Thomson scattering system. 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 optimum antenna 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 of EBW, which can explain several times lower measured radiative temperature than the electron temperature measured by the Thomson scattering system. (en)
Title	First results from EBW emission diagnostics on COMPASS First results from EBW emission diagnostics on COMPASS (en)
skos:prefLabel	First results from EBW emission diagnostics on COMPASS First results from EBW emission diagnostics on COMPASS (en)
skos:notation	RIV/61389021:_____/12:00381973!RIV13-GA0-61389021
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(7G10072), P(GA202/08/0419), Z(AV0Z20430508)
http://linked.open...iv/cisloPeriodika	10
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Žáček, František Weinzettl, Vladimír Preinhaelter, Josef Urban, Jakub Fuchs, Vladimír Böhm, Petr Bílková, Petra Aftanas, Milan Zajac, Jaromír
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyziky plazmatu AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	136698
http://linked.open...ai/riv/idVysledku	RIV/61389021:_____/12:00381973
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Overdense plasma; Conversion; Emission; Tokamaks; Elektron Bernstein waves (en)
http://linked.open.../riv/klicoveSlovo	Conversion Emission Elektron Bernstein waves Overdense plasma Tokamaks
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[646E9CE792EB]
http://linked.open...i/riv/nazevZdroje	Review of Scientific Instruments
http://linked.open...in/vavai/riv/obor	BL
http://linked.open...ichTvurcuVysledku	9 (xsd:int)
http://linked.open...cetTvurcuVysledku	10 (xsd:int)
http://linked.open...vavai/riv/projekt	Joint carrying out by the Contracting Parties of activities within the thematic area %22fusion energy research%22 of the Seventh Community (Euratom) Framework Program Electron cyclotron emission and Bernstein waves
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	83
http://linked.open...iv/tvurceVysledku	Fuchs, Vladimír Preinhaelter, Josef Urban, Jakub Žáček, František Weinzettl, Vladimír Aftanas, Milan Bílková, Petra Böhm, Petr Zajac, Jaromír Nanobashvili, S.
http://linked.open...ain/vavai/riv/wos	000311562900174
http://linked.open...n/vavai/riv/zamer	Physical and chemical processes in plasmas and theis applications
issn	0034-6748
number of pages	3 (xsd:int)
http://bibframe.org/vocab/doi	10.1063/1.4733530

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