Real-time feedback system for divertor heat flux control at COMPASS tokamak

0543686 - ÚFP 2022 RIV GB eng J - Journal Article
Khodunov, I. - Komm, Michael - Havránek, Aleš - Adámek, Jiří - Böhm, Petr - Cavalier, Jordan - Seidl, Jakub - Devitre, A. - Dimitrova, Miglena - Elmore, S. - Faitsch, M. - Háček, Pavel - Havlíček, Josef - Hron, Martin - Imríšek, Martin - Krbec, Jaroslav - Peterka, Matěj - Pánek, Radomír - Samoylov, O. - Tomeš, Matěj - Tomova, B. - Vondráček, Petr - Weinzettl, Vladimír
Real-time feedback system for divertor heat flux control at COMPASS tokamak.
Plasma Physics and Controlled Fusion. Roč. 63, č. 6 (2021), č. článku 065012. ISSN 0741-3335. E-ISSN 1361-6587
R&D Projects: GA MŠMT(CZ) EF16_013/0001551; GA MŠMT(CZ) LM2018117
EU Projects: European Commission(XE) 633053 - EUROfusion
Institutional support: RVO:61389021
Keywords : detachment * divertor * heat flux * nitrogen * plasma * tokamak
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 2.532, year: 2021
Method of publishing: Open access
https://iopscience.iop.org/article/10.1088/1361-6587/abf03e

The reduction of the incident heat flux onto the divertor will be a necessity for the future thermonuclear reactors. Impurity seeding is recognized as an efficient way to achieve the partial detachment regime, which allows to dissipate a large fraction of power flux by radiation. This paper presents a heat flux real-time feedback system (RTFS) based on impurity seeding controlled by a combined ball-pen and Langmuir probe divertor array in the COMPASS tokamak. A number of features of the system have been studied, such as the type of impurity, seeding location, constants used in the real-time controller and the diagnostic selections. A detailed description of the designed RTFS and the results of the implementation are presented. The findings confirm the applicability of the RTFS for reduction and control of the divertor heat fluxes. Another important implication of this research is the ability of installing such systems in next-step devices.
Permanent Link: http://hdl.handle.net/11104/0320867