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Statements

Subject Item
n2:RIV%2F61389021%3A_____%2F13%3A00421661%21RIV14-MSM-61389021
rdf:type
skos:Concept n10:Vysledek
dcterms:description
Interpretation of retarding field analyser (RFA) measurements in flowing tokamak scrape- off layer plasmas requires a model of the perturbation introduced by the wake, or presheath, of the instrument. We extend a collisionless kinetic Mach probe theory to include a simple model of ion-ion collisions. Collisions lead to significant modifications in the downstream presheath. Depending on the ion-to-electron temperature ratio, flow speed and collisionality, the measurement obtained by averaging the apparent temperatures on each side of a bi-directional RFA is predicted to overestimate the unperturbed ion temperature, but with errors not exceeding 50% most of the time. The error increases with Mach number, and decreases with the ion-to-electron temperature ratio. Interpretation of retarding field analyser (RFA) measurements in flowing tokamak scrape- off layer plasmas requires a model of the perturbation introduced by the wake, or presheath, of the instrument. We extend a collisionless kinetic Mach probe theory to include a simple model of ion-ion collisions. Collisions lead to significant modifications in the downstream presheath. Depending on the ion-to-electron temperature ratio, flow speed and collisionality, the measurement obtained by averaging the apparent temperatures on each side of a bi-directional RFA is predicted to overestimate the unperturbed ion temperature, but with errors not exceeding 50% most of the time. The error increases with Mach number, and decreases with the ion-to-electron temperature ratio.
dcterms:title
A kinetic model of retarding field analyser measurements in strongly magnetized, flowing, collisional plasmas A kinetic model of retarding field analyser measurements in strongly magnetized, flowing, collisional plasmas
skos:prefLabel
A kinetic model of retarding field analyser measurements in strongly magnetized, flowing, collisional plasmas A kinetic model of retarding field analyser measurements in strongly magnetized, flowing, collisional plasmas
skos:notation
RIV/61389021:_____/13:00421661!RIV14-MSM-61389021
n10:predkladatel
n11:ico%3A61389021
n3:aktivita
n7:P n7:I
n3:aktivity
I, P(7G10072)
n3:cisloPeriodika
4
n3:dodaniDat
n19:2014
n3:domaciTvurceVysledku
n13:9984445
n3:druhVysledku
n9:J
n3:duvernostUdaju
n15:S
n3:entitaPredkladatele
n14:predkladatel
n3:idSjednocenehoVysledku
58670
n3:idVysledku
RIV/61389021:_____/13:00421661
n3:jazykVysledku
n18:eng
n3:klicovaSlova
plasma; collisions; magnetic field; retarding field analyzer
n3:klicoveSlovo
n4:plasma n4:magnetic%20field n4:retarding%20field%20analyzer n4:collisions
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[7F5EA00301E4]
n3:nazevZdroje
Plasma Physics and Controlled Fusion
n3:obor
n12:BL
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
3
n3:projekt
n16:7G10072
n3:rokUplatneniVysledku
n19:2013
n3:svazekPeriodika
55
n3:tvurceVysledku
Fuchs, Vladimír Gunn, J. P. Kočan, M.
n3:wos
000317739800012
s:issn
0741-3335
s:numberOfPages
11
n5:doi
10.1088/0741-3335/55/4/045012