Theoretical Simulation of the Closed Currents Near Non-Uniformly Strongly Heated Surface of Tungsten Due to Thermo-emf | Sciact - CRIS-system of Boreskov Institute of Catalysis

Theoretical Simulation of the Closed Currents Near Non-Uniformly Strongly Heated Surface of Tungsten Due to Thermo-emf Full article

Journal

Physics of Plasmas
ISSN: 1070-664X , E-ISSN: 1089-7674

Output data

Year: 2022, Volume: 29, Number: 3, Article number : 033503, Pages count : 8 DOI: 10.1063/5.0078087

Tags

Conductive materials; Magnetic fields; Magnetoplasma; Melting

Authors

Popov V.A. ^1,2 , Arakcheev A.S. ^1,3,4 , Kandaurov I.V. ¹ , Kasatov A.A. ^1,2 , Kurkuchekov V.V. ¹ , Trunev Yu.A. ¹ , Vasilyev A.A. ¹ , Vyacheslavov L.N. ¹

Affiliations

1	Budker Institute of Nuclear Physics of Siberian Branch, Russian Academy of Sciences (BINP SB RAS), Novosibirk 630090, Russia
2	Novosibirsk State University, Novosibirk 630090, Russia
3	Novosibirsk State Technical University, Novosibirk 630087, Russia
4	Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis of Siberian Branch Russian Academy of Sciences, Novosibirk 630090, Russia

Funding (1)

Russian Foundation for Basic Research

20-48-540029 (121050400009-4)

A problem of surface melting under the impact of plasmas is one of the most important in the development of future magnetic confinement fusion reactors. The expected high heat loads can lead to melting of tungsten chosen as the material of a divertor and the first wall of ITER. The tungsten melt can move under the action of forces and quickly deform a surface. This article shows that at high temperatures, a tungsten vapor can be considered as a conductive material with conductivity high enough to be taken into account during simulation of current through a sample. We describe the mechanism of current generation by the thermo-emf due to non-uniform heating of the vapor/condensed substance interface without external sources of charges. Even without direct contact with the external plasma, the density of this current is high enough to cause noticeable movement of the melt in an external magnetic field. Simulation shows that the melt moving observed at BETA may be caused not by a current of an electron beam but by non-uniformity of heating and can be reproduced by any other similar heat source in the external magnetic field. © 2022 Author(s).

Popov V.A. , Arakcheev A.S. , Kandaurov I.V. , Kasatov A.A. , Kurkuchekov V.V. , Trunev Y.A. , Vasilyev A.A. , Vyacheslavov L.N.
Theoretical Simulation of the Closed Currents Near Non-Uniformly Strongly Heated Surface of Tungsten Due to Thermo-emf
Physics of Plasmas. 2022. V.29. N3. 033503 :1-8. DOI: 10.1063/5.0078087 WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	Nov 10, 2021
Accepted:	Feb 6, 2022
Published print:	Mar 1, 2022
Published online:	Mar 1, 2022

Web of science:	WOS:000764431200001
Scopus:	2-s2.0-85126046741
Elibrary:	48190526
Chemical Abstracts:	2022:566883
Chemical Abstracts (print):	178:130664
OpenAlex:	W4214729489

DB	Citing
Scopus	7
Web of science	4
OpenAlex	7