Kappatou, A.; Weiland, M.; Bilato, R.; Kazakov, Y. O.; Dux, R.; Bobkov, V.; Pütterich, T.; McDermott, R. M.; EUROfusion MST1 Team; ASDEX Upgrade Team, Max Planck Institute for Plasma Physics, Max Planck Society: CXRS measurements of energetic helium ions in ASDEX Upgrade plasmas heated with a 3-ion ICRF scenario. Nuclear Fusion 61, 036017 (2021)

Kärcher, A.; Riesch, J.; Almanstötter, P.; Manhard, A.; Balden, M.; Coenen, J. W.; Hunger, K.; Maier, H.; Raumann, L.; Schwalenberg, D. et al.; Neu, R.: Deuterium retention in tungsten fiber-reinforced tungsten composites. Nuclear Materials and Energy 27, 100972 (2021)

Käsemann, C.-P.; Peglau, M.; Schmidt, A. B.; ASDEX Upgrade Team, Max Planck Institute for Plasma Physics, Max Planck Society: Rebuilding and optimization of a high voltage power supply for the additional heating systems of ASDEX Upgrade. Fusion Engineering and Design 170, 112533 (2021)

Kazakov, Y. O.; Ongena, J.; Wright, J. C.; Wukitch, S. J.; Bobkov, V.; Garcia, J.; Kiptily, V. G.; Mantsinen, M. J.; Nocente, M.; Schneider, M. et al.; Weisen, H.; Baranov, Y.; Baruzzo, M.; Bilato, R.; Chomiczewska, A.; Coelho, R.; Craciunescu, T.; Crombe, K.; Dreval, M.; Dumont, R.; Dumortier, P.; Durodie, F.; Eriksson, J.; Fitzgerald, M.; Galdon-Quiroga, J.; Gallart, D.; Garcia-Munoz, M.; Giacomelli, L.; Giroud, C.; Gonzalez-Martin, J.; Hakola, A.; Jacquet, P.; Johnson, T.; Kappatou, A.; Keeling, D.; King, D.; Kirov, K. K.; Lamalle, P.; Lennholm, M.; Lerche, E.; Maslov, M.; Mazzi, S.; Menmuir, S.; Monakhov, I.; Nabais, F.; Nave, M. F. F.; Ochoukov, R.; Polevoi, A. R.; Pinches, S. D.; Plank, U.; Rigamonti, D.; Salewski, M.; Schneider, P. A.; Sharapov, S. E.; Stancar, Z.; Thorman, A.; Valcarcel, D.; Van Eester, D.; Van Schoor, M.; Varje, J.; Weiland, M.; Wendler, N.; JET Contributors; ASDEX Upgrade Team, Max Planck Institute for Plasma Physics, Max Planck Society; Alcator C-Mod Team: Physics and applications of three-ion ICRF scenarios for fusion research. Physics of Plasmas 28, 020501 (2021)

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Kennedy, D.; Helander, P.: Coulomb collisions in strongly anisotropic plasmas II. Cyclotron cooling in laboratory pair plasmas. Journal of Plasma Physics 87 (1), 905870106 (2021)

Kennedy, D.; Helander, P.: Coulomb collisions in strongly anisotropic plasmas I. Cyclotron cooling in electron–ion plasmas. Journal of Plasma Physics 87 (1), 905870107 (2021)

Khodunov, I.; Komm, M.; Havranek, A.; Adamek, J.; Bohm, P.; Cavalier, J.; Seidl, J.; Devitre, A.; Dimitrova, M.; Elmore, S. et al.; Faitsch, M.; Hacek, P.; Havlicek, J.; Hron, M.; Imrisek, M.; Krbec, J.; Peterka , M.; Panek, R.; Samoylov, O.; Tomes, M.; Tomova, K.; Vondracek, P.; Weinzettl, V.; EUROfusion MST1 Team: Real-time feedback system for divertor heat flux control at COMPASS tokamak. Plasma Physics and Controlled Fusion 63, 065012 (2021)

Kiefer, C. K.; Angioni, C.; Tardini, G.; Bonanomi, N.; Geiger, B.; Mantica, P.; Pütterich, T.; Fable, E.; Schneider, P. A.; ASDEX Upgrade Team, Max Planck Institute for Plasma Physics, Max Planck Society et al.; EUROfusion MST1 Team; JET Contributors: Validation of quasi-linear turbulent transport models against plasmas with dominant electron heating for the prediction of ITER PFPO-1 plasmas. Nuclear Fusion 61, 066035 (2021)

Kilian, S.; Rohde, V.; Hübner, J.; Stelzer, F.; Uhlmann, M.: Erfahrungen aus der Prüfung einer Kernfusionsanlage als Ex-Anlage nach BetrSichV. Technische Sicherheit 11 (07-08), pp. 55 - 62 (2021)

Killer, C.; Narbutt, Y.; Grulke, O.; W7-X Team, Max Planck Institute for Plasma Physics, Max Planck Society: Turbulent transport in the scrape-off layer of Wendelstein 7-X. Nuclear Fusion 61, 096038 (2021)

Kirov, K. K.; Belonohy, E.; Challis, C. D.; Eriksson, J.; Frigione, D.; Garzotti, L.; Giacomelli, L.; Hobirk, J.; Kappatou, A.; Keeling, D. et al.; King, D.; Lerche, E.; Lomas, P. J.; Nocente, M.; Reux, C.; Rimini, F. G.; Sips, A. C. C.; Van Eester, D.; JET Contributors: Analysis of the fusion performance, beam-target neutrons and synergistic effects of JET's high-performance pulses. Nuclear Fusion 61, 046017 (2021)

Kleiber, R.; Borchardt, M.; Könies, A.; Slaby, C.: Modern methods of signal processing applied to gyrokinetic simulations. Plasma Physics and Controlled Fusion 63, 035017 (2021)

Kobayashi, S.; Nagasaki, K.; Hada, K.; Stange, T.; Okada, H.; Minami, T.; Kado, S.; Ohshima, S.; Tokuhara, K.; Nakamura, Y. et al.; Ishizawa, A.; Suzuki, Y.; Osakabe, M.; Murase, T.; Konoshima, S.; Mizuuchi, T.: Role of pre-ionization in NBI plasma start-up of Heliotron J using non-resonant microwave heating. Nuclear Fusion 61, 116009 (2021)

Kobayashi, T.; Nishizawa, T.; Sasaki, M.; Yoshinuma, M.; Ida, K.: Method for estimating the frequency-wavenumber resolved power spectrum density using the maximum entropy method for limited spatial points. Plasma Physics and Controlled Fusion 63, 045011 (2021)

Kocsis, G.; Tamura, N.; Bussiahn, R.; McCarthy, K.J.; Baldzuhn, J.; Biedermann, C.; Cseh, G.; Damm, H.; Kornejew, P.; König, R. et al.; Panadero, N.; Szepesi, T.; W7-X Team, Max Planck Institute for Plasma Physics, Max Planck Society: Investigation of TESPEL cloud dynamics in Wendelstein 7-X stellarator. Nuclear Fusion 61, 016006 (2021)

Koleva, M.; Tardini, G.; Zohm, H.; Äkäslompolo, S.; Leppänen, J.; ASDEX Upgrade Team, Max Planck Institute for Plasma Physics, Max Planck Society: Calibration of neutron detectors at ASDEX Upgrade, measurement and model. Fusion Engineering and Design 167, 112702 (2021)

Komm, M.; Mancini, D.; Morbey, M.; Cavalier, J.; Adamek, J.; Bernert, M.; Bilkova, P.; Bohm, P.; Brida, D.; Fevrier, O. et al.; Henderson, S.; Hron, M.; Jerab, M.; Imrisek, M.; Kripner, L.; Naydenkova, D.; Panek, R.; Sos, M.; Vondracek, P.; EUROfusion MST1 Team: Power exhaust by core radiation at COMPASS tokamak. Nuclear Fusion 61, 036016 (2021)

Kontula, J.; Koschinsky, J. P.; Äkäslompolo, S.; Kurki-Suonio, T.; W7-X Team, Max Planck Institute for Plasma Physics, Max Planck Society: ASCOT simulations of 14 MeV neutron rates in W7-X: effect of magnetic configuration. Plasma Physics and Controlled Fusion 63, 035022 (2021)

Kormann, K.; Sonnendrücker, E.: Energy-conserving time propagation for a structure-preserving particle-in-cell Vlasov–Maxwell solver. Journal of Computational Physics 425, 109890 (2021)