ITER relevant multi-emissive sheaths at normal magnetic field inclination

0583098 - ÚFP 2024 RIV US eng J - Journal Article
Tolias, P. - Komm, Michael - Ratynskaia, S. - Podolník, Aleš
ITER relevant multi-emissive sheaths at normal magnetic field inclination.
Nuclear Fusion. Roč. 63, č. 2 (2023), č. článku 026007. ISSN 0029-5515. E-ISSN 1741-4326
R&D Projects: GA MŠMT(CZ) EF16_013/0001551
EU Projects: European Commission(BE) 101052200
Institutional support: RVO:61389021
Keywords : emissive sheath * escaping current density * macroscopic melt motion * Schottky effect * secondary electron emission * thermionic emission
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 3.3, year: 2022
Method of publishing: Open access
https://iopscience.iop.org/article/10.1088/1741-4326/acaabd

Reliable modeling of macroscopic melt motion induced by fast transients requires the accurate and computationally efficient description of the emitted current density that escapes to the pre-sheath. The ITER sheaths that surround hot tungsten surfaces during edge-localized modes are characterized by important contributions from secondary electron emission and electron backscattering as well as by the coupling between thermionic emission and field electron emission. Under the guidance of systematic particle-in-cell simulations that incorporate a comprehensive analytical electron emission model, a highly accurate semi-empirical treatment of the escaping electron current has been achieved.
Permanent Link: https://hdl.handle.net/11104/0351096


Research data: Zenodo