The fusion reaction between deuterium and tritium, D(T,n)4 He is the main source of energy in future thermonuclear reactors. Alpha-particles (4 He-ions) born with an average energy of 3.5 MeV transferring energy to the thermal plasma during their slowing down, should provide the self-sustained D-T plasma burn. The adequate confinement of α-particles is essential to provide efficient heating of the bulk plasma and steady burning of a reactor plasma. That is why the fusion-born α-particle studies have been a priority task in the second D-T experiments (DTE2) on the Joint European Torus (JET) to understand the main mechanisms of their slowing down, redistribution and losses and to develop optimal plasma scenarios. JET with Be-wall and W-divertor, enhanced auxiliary heating systems and improved energetic-particle diagnostic capabilities, producing significant population of α-particles, provided the possibility for comprehensive studying of the α-particle behaviour. Selected results of the confined and lost α-particle measurements, evidence of α-particle self-heating and assessments of the fusion performance are presented in this paper giving an opportunity for further modelling and extrapolation to the International Thermonuclear Experimental Reactor and burning plasma reactors.

Kiptily, V., Challis, C., Dumont, R., Fitzgerald, M., Garcia, J., Garzotti, L., et al. (2024). Observation of alpha-particles in recent D-T experiments on JET. NUCLEAR FUSION, 64(8) [10.1088/1741-4326/ad5c81].

Observation of alpha-particles in recent D-T experiments on JET

Garcia J.;Dal Molin A.;Nocente M.;Rigamonti D.;Tardocchi M.;
2024

Abstract

The fusion reaction between deuterium and tritium, D(T,n)4 He is the main source of energy in future thermonuclear reactors. Alpha-particles (4 He-ions) born with an average energy of 3.5 MeV transferring energy to the thermal plasma during their slowing down, should provide the self-sustained D-T plasma burn. The adequate confinement of α-particles is essential to provide efficient heating of the bulk plasma and steady burning of a reactor plasma. That is why the fusion-born α-particle studies have been a priority task in the second D-T experiments (DTE2) on the Joint European Torus (JET) to understand the main mechanisms of their slowing down, redistribution and losses and to develop optimal plasma scenarios. JET with Be-wall and W-divertor, enhanced auxiliary heating systems and improved energetic-particle diagnostic capabilities, producing significant population of α-particles, provided the possibility for comprehensive studying of the α-particle behaviour. Selected results of the confined and lost α-particle measurements, evidence of α-particle self-heating and assessments of the fusion performance are presented in this paper giving an opportunity for further modelling and extrapolation to the International Thermonuclear Experimental Reactor and burning plasma reactors.
Articolo in rivista - Articolo scientifico
alpha-particles; DT-plasmas; fusion; JET;
English
2024
64
8
086059
open
Kiptily, V., Challis, C., Dumont, R., Fitzgerald, M., Garcia, J., Garzotti, L., et al. (2024). Observation of alpha-particles in recent D-T experiments on JET. NUCLEAR FUSION, 64(8) [10.1088/1741-4326/ad5c81].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/503899
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