L-H transition studies in tritium and deuterium–tritium campaigns at JET with Be wall and W divertor

{The recent deuterium–tritium campaign in JET-ILW (DTE2) has provided a unique opportunity to study the isotope dependence of the L-H power threshold in an ITER-like wall environment (Be wall and W divertor). Here we present results from dedicated L-H transition experiments at JET-ILW, documenting t...

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Detalles Bibliográficos
Autores: Solano, Emilia R, Birkenmeier, Gregor, Garcia Silva, Carlos, Delabie, Ephrem, Hillesheim, J.C., Gallart, Daniel|||0000-0003-1663-3550, Mantsinen, Mervi J.
Tipo de recurso: artículo
Fecha de publicación:2023
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/413816
Acceso en línea:https://hdl.handle.net/2117/413816
https://dx.doi.org/10.1088/1741-4326/acee12
Access Level:acceso abierto
Palabra clave:Plasma heating
Electron density
L-H transition
Power threshold
Tokamaks
Tritium
DT
JET-ILW
Isotope
Simulació per ordinador
Àrees temàtiques de la UPC::Física
Descripción
Sumario:{The recent deuterium–tritium campaign in JET-ILW (DTE2) has provided a unique opportunity to study the isotope dependence of the L-H power threshold in an ITER-like wall environment (Be wall and W divertor). Here we present results from dedicated L-H transition experiments at JET-ILW, documenting the power threshold in tritium and deuterium–tritium plasmas, comparing them with the matching deuterium and hydrogen datasets. From earlier experiments in JET-ILW it is known that as plasma isotopic composition changes from deuterium, through varying deuterium/hydrogen concentrations, to pure hydrogen, the value of the line averaged density at which the threshold is minimum, , increases, leading us to expect that (T) < (DT) < (D) < (H). The new power threshold data confirms these expectations in most cases, with the corresponding ordering of the minimum power thresholds. We present a comparison of this data to power threshold scalings, used for extrapolation to future devices such as ITER and DEMO.

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