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High-heat flux ball-pen probe head in ASDEX-Upgrade
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SYSNO ASEP 0555630 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title High-heat flux ball-pen probe head in ASDEX-Upgrade Author(s) Grenfell, G. (DE)
Adámek, Jiří (UFP-V) RID, ORCID
Komm, Michael (UFP-V) RID, ORCID
Brida, D. (DE)
Conway, G.D. (DE)
Manz, P. (DE)
Tolias, P. (SE)
Eich, T. (DE)
Šesták, David (UFP-V) RID
Herrmann, A. (DE)
Nishizawa, T. (DE)
Stroth, U. (DE)Number of authors 12 Source Title Review of Scientific Instruments. - : AIP Publishing - ISSN 0034-6748
Roč. 93, č. 2 (2022), s. 023507Number of pages 9 s. Language eng - English Country US - United States Keywords ASDEX-Upgrade ; tokamak ; ball-pen probe Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects LM2018117 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_019/0000768 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UFP-V - RVO:61389021 UT WOS 000760756500001 EID SCOPUS 85125589512 DOI 10.1063/5.0075846 Annotation A new high heat flux ball-pen probe head installed on the midplane manipulator is currently being used in ASDEX-Upgrade (AUG). The probe was designed to withstand high heat fluxes making possible the investigation of the plasma edge under harsh conditions, such as low power H-mode. Composed of seven pins (four Langmuir probes, mounted in two Mach probe pairs, and three ball-pen probes), the new probe head allows us to measure several plasma parameters simultaneously and with high temporal resolution. A novel method to correct the sheath potential dynamically accounting for the total secondary electron emission is introduced together with applications to obtain the electron temperature and plasma potential profiles. The total secondary electron emission yield is obtained from particle in cell simulations in AUG condition and probe realistic impact angle with respect to the magnetic field. Finally, the probe capability to investigate turbulence around the separatrix of AUG is discussed. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2022 Electronic address https://aip.scitation.org/doi/10.1063/5.0075846
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