Improved heat and particle flux mitigation in high core confinement, baffled, alternative divertor configurations in the TCV tokamak. (1st December 2022)

• Record Type: Journal Article
• Authors: Raj, Harshita; Theiler, C.; Thornton, A.; Février, O.; Gorno, S.; Bagnato, F.; Blanchard, P.; Colandrea, C.; de Oliveira, H.; Duval, B.P.; Labit, B.; Perek, A.; Reimerdes, H.; Sheikh, U.; Vallar, M.; Vincent, B.
• Is Part Of: Nuclear fusion. Volume 62:Number 12(2022)
• Publication Date: 2022-12-01
• Subjects: tokamak -- advanced divertor configurations -- H-mode -- high confinement -- baffles -- Langmuir probes -- divertor heat load mitigation; Nuclear fusion -- Periodicals; 621.48405
• DOI: 10.1088/1741-4326/ac94e5
• Languages: English
• ISSNs: 0029-5515

Abstract

Abstract: Nitrogen seeded detachment has been achieved in the tokamak a configuration variable (TCV) in alternative divertor configurations (ADCs), namely X-divertor and X -point target, with and without baffles in H-mode plasmas with high core confinement. Both ADCs show a remarkable reduction in the inter-ELM particle and heat fluxes to the target compared to the standard divertor configuration. 95%–98% of the inter-ELM peak heat flux to the target is mitigated as a synergetic effect of ADCs, baffling, and nitrogen seeded detachment. The effect of divertor geometry and baffles on core-divertor compatibility is investigated in detail. The power balance in these experiments is also investigated to explore the physics behind the observed reduction in heat fluxes in the ADCs.