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Statements

Subject Item
n2:RIV%2F61389021%3A_____%2F05%3A00031054%21RIV06-GA0-61389021
rdf:type
n3:Vysledek skos:Concept
dcterms:description
Iontová teplota v okrajovém plazmatu tokamaku je obtížně měřitelná a zřídka dostupná veličina. Nový druh Langmuirovy sondy, tzv. segmentové tunelové sondy, byl vyvinut pro tento účel. Ukazujeme, že rozdělení iontů podél tunelu klesá s charakteristickou délkou, která je funkcí iontové teploty. Proto rozdělením tunelu na dva segmenty může být iontová teplota nalezena z poměrů proudů na tyto segmenty. Výhoda je, že sonda pracuje v DC režimu a poskytuje tudíž možnost rychlého měření iontové teploty stejně jako hustoty iontového proudu. Prezentujeme první výsledky numerických simulací a experimentálního testování této sondy na tokamaku CASTOR. Ion temperature in the tokamak scrape-off layer (SOL) is notoriously difficult tomeasure and thus rarely available. A new kind of the robust Langmuir probe, the so-called segmented tunnel probe, was designed for this purpose. We show, that the ion distribution along the tunnel decays with a characteristic scale length, which is a function of the ion temperature. Therefore, by dividing the tunnel into two segments, the ion temperature can be found from the ratio of ion current to the first and the second segment. The advantage is that the probe is operated in DC mode and thus provides fast measurements of ion temperature as well as of the parallel ion current density. We present preliminary results of the numerical simulations and the experimental testing of the STP prototype at CASTOR tokamak. Ion temperature in the tokamak scrape-off layer (SOL) is notoriously difficult tomeasure and thus rarely available. A new kind of the robust Langmuir probe, the so-called segmented tunnel probe, was designed for this purpose. We show, that the ion distribution along the tunnel decays with a characteristic scale length, which is a function of the ion temperature. Therefore, by dividing the tunnel into two segments, the ion temperature can be found from the ratio of ion current to the first and the second segment. The advantage is that the probe is operated in DC mode and thus provides fast measurements of ion temperature as well as of the parallel ion current density. We present preliminary results of the numerical simulations and the experimental testing of the STP prototype at CASTOR tokamak.
dcterms:title
A new probe for ion temperature measurements in the tokamak scrape-off layer A new probe for ion temperature measurements in the tokamak scrape-off layer Nová sonda pro měření iontové teploty v okrajovém plazmatu tokamaku
skos:prefLabel
Nová sonda pro měření iontové teploty v okrajovém plazmatu tokamaku A new probe for ion temperature measurements in the tokamak scrape-off layer A new probe for ion temperature measurements in the tokamak scrape-off layer
skos:notation
RIV/61389021:_____/05:00031054!RIV06-GA0-61389021
n4:strany
P;2.082
n4:aktivita
n14:P
n4:aktivity
P(GA202/03/0786), P(GP202/03/P062)
n4:dodaniDat
n9:2006
n4:domaciTvurceVysledku
n11:4428846 n11:2769999
n4:druhVysledku
n8:D
n4:duvernostUdaju
n16:S
n4:entitaPredkladatele
n20:predkladatel
n4:idSjednocenehoVysledku
510960
n4:idVysledku
RIV/61389021:_____/05:00031054
n4:jazykVysledku
n7:eng
n4:klicovaSlova
probes in plasma; ion temperature; edge plasma
n4:klicoveSlovo
n6:probes%20in%20plasma n6:ion%20temperature n6:edge%20plasma
n4:kontrolniKodProRIV
[00681D6F0EB2]
n4:mistoKonaniAkce
Tarragona
n4:mistoVydani
Tarragona
n4:nazevZdroje
Proceedings of 32nd EPS Conference on Plasma Physics
n4:obor
n19:BL
n4:pocetDomacichTvurcuVysledku
2
n4:pocetTvurcuVysledku
5
n4:projekt
n12:GP202%2F03%2FP062 n12:GA202%2F03%2F0786
n4:rokUplatneniVysledku
n9:2005
n4:tvurceVysledku
Kočan, M. Stöckel, Jan Gunn, J. P. Skalný, J. D. Pánek, Radomír
n4:typAkce
n13:WRD
n4:zahajeniAkce
2005-06-27+02:00
s:numberOfPages
8
n17:hasPublisher
European Physical Society
n18:isbn
2-914771-24-X