Impact of RF waves – fast NBI ions interaction on the fusion performance in JET DTE2 campaign
This work studies the interaction between Radio Frequency (RF) waves used for Ion Cyclotron Resonance Heating (ICRH) and the fast Deuterium (D) and Tritium (T) Neutral Beam Injected (NBI) ions in DT plasma. The focus is on the effect of this interaction, also referred to as synergistic effects, on t...
| Autores: | , , , , , |
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| 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:2117/396955 |
| Acceso en línea: | https://hdl.handle.net/2117/396955 https://dx.doi.org/10.1088/1741-4326/ad0dd5 |
| Access Level: | acceso abierto |
| Palabra clave: | Plasma heating Tokamaks RF waves JET DTE2 Ion Cyclotron Resonance Heating (ICRH) Simulació per ordinador Àrees temàtiques de la UPC::Informàtica::Aplicacions de la informàtica::Aplicacions informàtiques a la física i l‘enginyeria |
| Sumario: | This work studies the interaction between Radio Frequency (RF) waves used for Ion Cyclotron Resonance Heating (ICRH) and the fast Deuterium (D) and Tritium (T) Neutral Beam Injected (NBI) ions in DT plasma. The focus is on the effect of this interaction, also referred to as synergistic effects, on the fusion performance in the recent JET DTE2 campaign. Experimental data from dedicated pulses at 3.43T/2.3MA heated at (i) 51.4MHz giving central minority H and n=2 D and at (ii) 32.2MHz for central minority 3He and n=2 T resonances were analyzed and conclusions were drawn and supported by modelling of the synergistic effects. TRANSP runs with and without RF kick operator predicted moderate increase, about 10%, in DT rates for the case of RF wave - fast D NBI ions interactions at n=2 harmonic of ion cyclotron resonance and negligible impact by synergistic interaction between fast T NBI ions and RF waves. JETTO modelling gives 29% enhancement of fusion rates due to RF waves – fast D NBI ions interaction and 18% enhancement for fast T NBI ions. Analysis of experimental neutron rates compared to TRANSP predictions without synergistic effects and Magnetic Proton Recoil (MPRu) neutron spectrometer indicate approximately 25-28% enhancement of fusion rates due to RF interaction with fast D ions and approximately 5-8% when RF wave – fast T NBI ions interaction is taking place. Contribution of various heating and fast ion sources have been assessed and discussed. } |
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