Control of the hydrogen: deuterium isotope mixture using pellets in JET

JET Contributors, D. R. Hatch, T. Ahlgren, L. Aho-Mantila, M. Airila, C. Björkas, K. Heinola, A. Lahtinen, K. Nordlund, E. Safi, S.-P. Pehkonen, A. Salmi, T. Tala, J. Likonen, S. Koivuranta, A. Hakola, O. Asunta, L. Chone, M. Groth, J. KarhunenT. Kurki-Suonio, S. Leerink, B. Lomanowski, J. Lonnroth, M. I. K. Santala, J. Simpson, S. K. Sipila, J. Varje, M. Valovic

Research output: Contribution to journalArticleScientificpeer-review


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 Phi(pel) = 0.045P(aux)/T-e,T-ped 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.

Original languageEnglish
Article number106047
JournalNuclear Fusion
Issue number10
Number of pages7
Publication statusPublished - Oct 2019
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 114 Physical sciences

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