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Notable

ITER's Stefan Jachmich wins Nuclear Fusion journal prize

20 Oct 2025

Stefan Jachmich has been recognized with the 2025 Nuclear Fusion Award for his “highly significant paper” validating shattered pellet injection as a key method for disruption mitigation.

Stefan Jachmich is the coordinating scientist for disruptions in ITER's Experiments & Plasma Operation Section.

Jachmich’s paper, titled “Shattered pellet injection experiments at JET in support of the ITER disruption mitigation system design,” first published in December 2021, reports on critical results from an experimental campaign executed on the Joint European Torus. 

According to the judges: “This highly significant paper validates shattered pellet injection as a key disruption mitigation method to protect large tokamaks such as ITER from the damaging effects of disrupting plasmas, strengthening the ITER disruption mitigation system design and guiding design choices for DEMO and future tokamak-based fusion power plants.” 

Mikhail Chudakov, IAEA Deputy Director General and Head of the Department of Nuclear Energy, presents the award to ITER's Stefan Jachmich.

The Nuclear Fusion Award, given annually and traditionnally presented at the biennial IAEA Fusion Energy Conference, honours outstanding research published in the journal. It celebrates papers of exceptional scientific quality that make a significant contribution to their field. Nominations are based on citation records and recommendations by the Board of Editors, with a final selection made by secret ballot. The winning paper is the one judged to have had the greatest scientific impact.

“This is a huge recognition of my work and that of my collaborators,” said Jachmich after the ceremony. “I am also happy for the ITER Organization, which is often viewed mainly as a construction project. A lot of science is being done at ITER. We are reaching out to partner institutes to answer the essential questions to further progress the different plant systems but also the ITER Research Plan.” 

Journal article reference: S. Jachmich, U. Kruezi, M. Lehnen, M. Baruzzo, L.R. Baylor, D. Carnevale, D. Craven, N.W. Eidietis, O. Ficker, T.E. Gebhart, S. Gerasimov, J.L. Herfindal, E. Hollmann, A. Huber, P. Lomas, J. Lovell, A. Manzanares, M. Maslov, J. Mlynar, G. Pautasso, C. Paz-Soldan, A. Peacock, L. Piron, V. Plyusnin, M. Reinke, C. Reux, F. Rimini, U. Sheikh, D. Shiraki, S. Silburn, R. Sweeney, J. Wilson, P. Carvalho and the JET Contributors (2021). Shattered pellet injection experiments at JET in support of the ITER disruption mitigation system design. Nuclear Fusion, 62. https://iopscience.iop.org/article/10.1088/1741-4326/ac3c86

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