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Hopf, C.; Jacob, W.; Rohde, V.: Removal of hydrocarbon films by oxygen containing glow discharges - laboratory experiments and O₂/He cleaning in ASDEX-Upgrade. Seminar de Equipe Plasma Surface, Université de Marseille (2005)

Jacob, W.; Hopf, C.; Schlüter, M.; Schwarz-Selinger, T.: Chemical Sputtering of Carbon Materials due to Combined Bombardment by Ions and Atomic Hydrogen. New Directions for Advanced Computer Simulations and Experiments in Fusion-Related Plasma-Surface Interactions (PSIF), Oak Ridge,TN (2005)

Schlüter, M.; Hopf, C.; Jacob, W.: Chemical Sputtering of a-C:H Films. 12. Erfahrungsaustausch Oberflächentechnologie mit Plasma- und Ionenstrahlprozessen, Mühlleithen (2005)

Jacob, W.; Sun, C.; Hopf, C.; Schlüter, M.; Schwarz-Selinger, T.: Effects of Extrinsic Impurities on Hydrocarbon Production. EFDA Progress Meeting on EFDA Task TW4-TPP-TRIDEP, Lehrstuhl für Experimentelle Plasmaphysik, Humboldt-Universität, Berlin (2005)

Jacob, W.; Hopf, C.; von Keudell, A.; Meier, M.; Schwarz-Selinger, T.: Elementary Surface Processes during Growth and Erosion of Amorphous Hydrogenated Carbon Films. 5th Meeting on Diamond, Amorphous Carbon, Nanotubes and Related Materials, Rio de Janeiro (2003)

Jacob, W.; Hopf, C.; von Keudell, A.; Meier, M.; Schwarz-Selinger, T.: Chemical Sputtering of Hydrocarbon Layers. ASEVA Workshop 14: Reactive Plasmas - Physical and Chemical Processes in Reactive Hydrocarbon Plasmas in Contact with Surfaces, Avila (2003)

von Keudell, A.; Hopf, C.; Meier, M.; Schwarz-Selinger, T.; Jacob, W.: Elementary Surface Processes during Growth of a-C:H Films. ASEVA Workshop 14: Reactive Plasmas - Physical and Chemical Processes in Reactive Hydrocarbon Plasmas in Contact with Surfaces, Avila (2003)

Jacob, W.; Hopf, C.; von Keudell, A.: Chemical Sputtering oder Was treiben die Wasserstoffatome und Ionen gemeinsam auf der Oberfläche von a-C:H-Schichten? 10. Erfahrungsaustauch "Oberflächentechnologie mit Plasmaprozessen", Mühlleithen (2003)

Starnella, G.; Hopf, C.: A beam-driven plasma neutraliser for DEMO NBI: towards experimental validation. 31st Symposium on Fusion Technology (SOFT 2020), Virtual Edition (submitted)

Agostinetti, P.; Franke, T.; Fantz, U.; Hopf, C.; Mantel, N.; Tran, M. Q.: RAMI Evaluation of the Beam Source for the DEMO Neutral Beam Injectors. 14th International Symposium on Fusion Nuclear Technology (ISFNT-14), Budapest (2019)

Harder, N. d.; Bonomo, F.; Hurlbatt, A.; Hopf, C.; Fantz, U.; NNBI Team, Max Planck Institute for Plasma Physics, Max Planck Society: Beam formation and transport in the BATMAN Upgrade test facility. 14th International Symposium on Fusion Nuclear Technology (ISFNT-14), Budapest (submitted)

Hopf, C.; Starnella, G.; Harder, N. d.; Agostinetti, P.; Fantz, U.: Residual Ion Energy Recovery for the DEMO NBI – a Conceptual Design Study. 14th International Symposium on Fusion Nuclear Technology (ISFNT-14), Budapest (submitted)

McNeely, P.; Äkäslompolo, S.; Auerweck, W.; Drider, Y.; Ford, O.; Hartmann, D.; Heinemann, B.; Heinrich, S.; Hopf, C.; Kairys, R. et al.; Obermeyer, S.; Riedl, R.; Rong, P.; Rust, N.; Schroeder, R.; Wolf, R. C.; W7-X Team, Max Planck Institute for Plasma Physics, Max Planck Society: Commissioning and Initial Operation of the W7-X Neutral Beam Injection Heating System. 14th International Symposium on Fusion Nuclear Technology (ISFNT-14), Budapest (submitted)

Starnella, G.; Hopf, C.; Harder, N. d.: Conceptual design study of an Energy Recovery System for the DEMO NBI. DPG-Frühjahrstagung der Sektion Atome, Moleküle, Quantenoptik und Plasmen (SAMOP), Hannover (submitted)

Geiger, B.; Karpushov, A. N.; Akers, R.; Bock, A.; Dunne, M. G.; Duval, B. P.; Fontana, M.; Giannone, L.; Hobirk, J.; Hopf, C. et al.; Jacobsen, A. S.; Keeling, D.; Lauber, P.; Marini, C.; Pölöskei, P. Z.; Salewski, M.; Sauter, O.; Schneider, P. A.; Snicker, A.; Jansen van Vuuren, A.; Wilkie, G. J.; Willensdorfer, M.; TCV Team; ASDEX Upgrade Team, Max Planck Institute for Plasma Physics, Max Planck Society; EUROfusion MST1 Team: Fast-Ion Confinement in Low Collisionality Discharges at ASDEX-Upgrade and TCV. 27th IAEA Fusion Energy Conference (FEC 2018), Gandhinagar (submitted)

Harder, N. d.; Zammuto, I.; Orozco, G.; Hopf, C.; ASDEX Upgrade Team, Max Planck Institute for Plasma Physics, Max Planck Society: Modeling neutral beam transport in fusion experiments: Studying the effects of reionisation and deflection. 30th Symposium on Fusion Technology (SOFT 2018), Giardini Naxos (submitted)

Hopf, C.; Starnella, G.; Harder, N. d.; Heinemann, B.; Fantz, U.: A conceptual system design study for an NBI beamline for the European DEMO. 30th Symposium on Fusion Technology (SOFT 2018), Giardini Naxos (submitted)

Rittich, D.; Hopf, C.; Geiger, B.; Bock, A.; Fischer, R.; Ryter, F.; Stober, J.; ASDEX Upgrade Team, Max Planck Institute for Plasma Physics, Max Planck Society: Quantification of Neutral Beam Driven Current and the Effect of Radial Fast-Ion Transport in ASDEX-Upgrade. 27th IAEA Fusion Energy Conference (FEC 2018), Gandhinagar (submitted)

Starnella, G.; Hopf, C.; Harder, N. d.; Fantz, U.: Conceptual system design study of an NNBI beamline for DEMO. DPG-Frühjahrstagung 2019 der Sektion Materie und Kosmos (SMuK), München (submitted)

Fantz, U.; Hopf, C.; Friedl, R.: Technology Developments for a Beam Source of a NNBI System for DEMO. 13th International Symposium on Fusion Nuclear Technology (ISFNT-13), Kyoto (submitted)