Control of the hydrogen:deuterium isotope mixture using pellets in JET. (9th September 2019)

• Record Type: Journal Article
• Authors: Valovič, M.; Baranov, Y.; Boboc, A.; Buchanan, J.; Citrin, J.; Delabie, E.; Frassinetti, L.; Fontdecaba, J.M.; Garzotti, L.; Giroud, C.; McKean, R.; Lerche, E.; Kiptily, V.; Köchl, F.; Marin, M.; Maslov, M.; Menmuir, S.; Tvalashvili, G.; Weisen, H.
• Other Names: collab.
• Is Part Of: Nuclear fusion. Volume 59:Number 10(2019:Oct.)
• Publication Date: 2019-09-09
• Subjects: tokamak -- isotope mix control -- pellet fuelling; Nuclear fusion -- Periodicals; 621.48405
• DOI: 10.1088/1741-4326/ab3812
• Languages: English
• ISSNs: 0029-5515

Abstract

Abstract: Deuterium pellets are injected into an initially pure hydrogen H-mode plasma in order to control the hydrogen:deuterium (H:D) isotope mixture. The pellets are deposited in the outer 20% of the minor radius, similar to that expected in ITER, creating transiently hollow electron density profiles. A H:D isotope mixture of approximately 45%:55% is obtained in the core with a pellet fuelling throughput of similar to previous pellet fuelling experiments in pure deuterium. Evolution of the H:D mix in the core is reproduced using a simple model, although deuterium transport could be higher at the beginning of the pellet train compared with the flat-top phase.