Number of the records: 1
Optimization of time-averaged power flux of RMP footprints in ITER
- 1.
SYSNO ASEP 0484391 Document Type A - Abstract R&D Document Type O - Ostatní Title Optimization of time-averaged power flux of RMP footprints in ITER Author(s) Kripner, Lukáš (UFP-V) ORCID
Loarte, A. (FR)
Cahyna, Pavel (UFP-V) RID
Urban, Jakub (UFP-V) RID
Peterka, Matěj (UFP-V) RID, ORCID
Evans, T. (US)
Schmitz, O. (DE)
Pánek, Radomír (UFP-V) RIDSource Title Bulletin of the American Physical Society, 59th Annual Meeting of the APS Division of Plasma Physics, vol. 62, 12/2017, vol. 62, 12/2017. - San Jose : American Physical Society, 2017 - ISSN 0003-0503 Number of pages 1 s. Publication form Online - E Action APS: 59th Annual Meeting of the APS Division of Plasma Physics 2017 Event date 23.10.2017 - 27.10.2017 VEvent location Milwaukee, Wisconsin Country US - United States Event type WRD Language eng - English Country US - United States Keywords RMP ; ITER Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects GA16-24724S GA ČR - Czech Science Foundation (CSF) Institutional support UFP-V - RVO:61389021 Annotation Plasma-facing components (PFCs) in the ITER tokamak have engineering limits of the incident heat flux ( 10 MWm-2). These limits may be exceeded for example by Edge Localized Modes (ELMs) or by Resonant Magnetic Perturbations (RMPs). The time-averaged power flux can be reduced by a toroidal rotation of the ITER ELM coils (IECs) current waveform. However, such a rigid rotation results in large mechanical loads to IECs, which can significantly decrease their lifetime. We evaluate various options to decrease the required variations in the IECs currents while keeping the time-averaged power flux on the ITER divertor below the engineering limit. We use the Bayesian optimization algorithm to seek the optimum configuration. This method works efficiently even for a moderately large dimensionality, in our case up to several tens. For the analysis of a particular waveform we use the tangle distance method [Cahyna et al. Nucl. Fusion 2014], which is, due to its semi-analytical nature, fast enough to evaluate a wide range of options and plasma scenarios. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2018
Number of the records: 1