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Particle-In-Cell simulations of the Ball-pen probe
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SYSNO ASEP 0349663 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Particle-In-Cell simulations of the Ball-pen probe Author(s) Komm, M. (CZ)
Adámek, Jiří (UFP-V) RID, ORCID
Pekárek, Z. (CZ)
Pánek, Radomír (UFP-V) RIDSource Title Contributions to Plasma Physics. - : Wiley - ISSN 0863-1042
Roč. 50, č. 9 (2010), s. 814-818Number of pages 6 s. Publication form web - web Language eng - English Country DE - Germany Keywords Ball-pen ; tokamak ; plasma ; plasma potential ; PIC ; simulation ; I-V characteristics Subject RIV BL - Plasma and Gas Discharge Physics R&D Projects KJB100430901 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z20430508 - UFP-V (2005-2011) UT WOS 000284135100005 DOI 10.1002/ctpp.201010137 Annotation In this paper, we present results of Particle-In-Cell simulations of a simplified model of the Ball-pen probe (BPP). The BPP is a probe designed for direct measurements of plasma potential in the scrape-off layer (SOL) of tokamaks. The probe is based on a standard Langmuir theory, which states that when the ratio of ion and electron saturation currents flowing to the probe collector approaches zero, the floating potential of the collector is close to the plasma potential. However, it is unclear whether the Langmuir theory is still valid in such a complex geometry, where the probe tunnel can work as a filter in velocity phase-space and as such violates the Maxwellian distributions of particle velocities. To verify the validity of the theory a simplified model of BPP has been studied using the SPICE2 code. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2011
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