Particle-in-cell simulace vlivu tvaru hlavice sondy Retarding field analyzátoru na měření iontového nasyceného proudu

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F04%3A00103214" target="_blank" >RIV/61389021:_____/04:00103214 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Particle-in-cell simulations of the impact of retarding field analyser probe head geometry on ion saturation current measurements

Popis výsledku v původním jazyce

The Retarding Field Analyser (RFA) is essentially the only practical tool for the measurement of ion energies parallel to the total magnetic field in the tokamak scrape of layer plasma. One such device has recently been successfully employed at JET. Itsbi-directional nature allows both measurements of ion temperature and plasma flow velocities. The latter are computed by collecting the ion saturation flux to negatively biased entrance slit plates which are set back inside a boron nitride protective housing. When comparing the RFA slit currents with those measured by a turbulent transport probe (TTP), the RFA fluxes are found to be a factor 4-5 lower for very similar plasma conditions. Using Particle-in-Cell (PIC) simulations, this contribution demonstrates unambiguously and quantitatively, that the RFA flux attenuation is induced by the magnetic pre-sheath formed in the orifice in front of the slit plates.

Název v anglickém jazyce

Particle-in-cell simulations of the impact of retarding field analyser probe head geometry on ion saturation current measurements

Popis výsledku anglicky

The Retarding Field Analyser (RFA) is essentially the only practical tool for the measurement of ion energies parallel to the total magnetic field in the tokamak scrape of layer plasma. One such device has recently been successfully employed at JET. Itsbi-directional nature allows both measurements of ion temperature and plasma flow velocities. The latter are computed by collecting the ion saturation flux to negatively biased entrance slit plates which are set back inside a boron nitride protective housing. When comparing the RFA slit currents with those measured by a turbulent transport probe (TTP), the RFA fluxes are found to be a factor 4-5 lower for very similar plasma conditions. Using Particle-in-Cell (PIC) simulations, this contribution demonstrates unambiguously and quantitatively, that the RFA flux attenuation is induced by the magnetic pre-sheath formed in the orifice in front of the slit plates.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

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Projekt

<a href="/cs/project/GP202%2F03%2FP062" target="_blank" >GP202/03/P062: Modelování vybraných procesů v okrajovém plazmatu tokamaku</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2004

Kód důvěrnosti údajů

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

Název periodika

Czechoslovak Journal of Physics

ISSN

0011-4626

e-ISSN

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Svazek periodika

54

Číslo periodika v rámci svazku

suppl.C

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

"C150"-"C156"

Kód UT WoS článku

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EID výsledku v databázi Scopus

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