aalto1 untyped-item.component.html
Characterisation of divertor detachment onset in JET-ILW hydrogen, deuterium, tritium and deuterium–tritium low-confinement mode plasmas
Loading...
Access rights
openAccess
publishedVersion
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Unless otherwise stated, all rights belong to the author. You may download, display and print this publication for Your own personal use. Commercial use is prohibited.
Date
Department
Major/Subject
Mcode
Degree programme
Language
en
Pages
8
Series
Nuclear Materials and Energy, Volume 34, pp. 1-8
Abstract
Measurements of the ion currents to and plasma conditions at the low-field side (LFS) divertor target plate in low-confinement mode plasmas in the JET ITER-like wall materials configuration show that the core plasma density required to detach the LFS divertor plasma is independent of the hydrogenic species protium, deuterium and tritium, and a 40 %/60 % deuterium–tritium mixture. This observation applies to a divertor plasma configuration with the LFS strike line connected to the horizontal part of the LFS divertor chosen because of its superior diagnostic coverage. The finding is independent of the operational status of the JET cryogenic pump. The electron temperature (Te) at the LFS strike line was markedly reduced from 25 eV to 5 eV over a narrow range of increasing core plasma density, and observed to be between 2 eV and 3 eV at the onset of detachment. The electron density (ne) peaks across the LFS plasma when Te at the target plate is 1 eV, and spatially moves to the X-point for higher core densities. The density limit was found approximately 20 % higher in protium than in tritium and deuterium–tritium plasmas.
Description
Funding Information: This work has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Programme (Grant Agreement No 101052200 — EUROfusion). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them. | openaire: EC/H2020/101052200/EU//EUROfusion
Keywords
Other note
Citation
Groth, M, Solokha, V, Aleiferis, S, Brezinsek, S, Brix, M, Carvalho, I S, Carvalho, P, Corrigan, G, Harting, D, Horsten, N, Jepu, I, Karhunen, J, Kirov, K, Lomanowski, B, Lawson, K D, Lowry, C, Meigs, A G, Menmuir, S, Pawelec, E, Pereira, T, Shaw, A, Silburn, S, Thomas, B, Wiesen, S, Börner, P, Borodin, D, Jachmich, S, Reiter, D, Sergienko, G, Stancar, Z, Viola, B, Beaumont, P, Bernardo, J, Coffey, I, Conway, N J, de la Luna, E, Douai, D, Giroud, C, Hillesheim, J, Horvath, L, Huber, A, Lomas, P, Maggi, C F, Maslov, M, Perez von Thun, C, Scully, S, Vianello, N, Wischmeier, M & JET Contributors 2023, 'Characterisation of divertor detachment onset in JET-ILW hydrogen, deuterium, tritium and deuterium–tritium low-confinement mode plasmas', Nuclear Materials and Energy, vol. 34, 101345, pp. 1-8. https://doi.org/10.1016/j.nme.2022.101345