Publikationen

Peer-Review Papers:

  • L. Henrich, D. Becker, M. Sach, J. Frey and C. Volkmar, "Adapting Direct-Current Current Transformers for contactless ion beam measurements of electric propulsion systems", Journal of Electric Propulsion 4(5), 2025
    DOI: 10.1007/s44205-025-00109-1
  • Y. Rover, R. Thueringer, U. Probst and C. Volkmar, "Modeling the influence of an electric thruster's ion beam on its global EMC", Frontiers in Space Technologies 4:1287474, 2023
    DOI: 10.3389/frspt.2023.1287474
  • F. Kiefer, K. Holste, P. J. Klar, Y. Rover, U. Probst, and C. Volkmar, "Reverberation chamber for electromagnetic compatibility testing of electric thrusters", Journal of Electric Propulsion 2(9), 2023
    DOI: 10.1007/s44205-023-00038-x
  • Y. Rover, R. Thueringer, C. Volkmar, U. Probst, F. Kiefer, K. Holste, and P. J. Klar, "Semi‑anechoic chamber for electromagnetic compatibility tests of electric propulsion thrusters", Journal of Electric Propulsion 2(3), 2023
    DOI: 10.1007/s44205-023-00039-w
  • E. Beller, C. Roessler, U. Probst, R. Thueringer, and C. Volkmar, "A radio-frequency generator for ion thrusters based on a Class-E power circuit", Journal of Electric Propulsion 1(8), 2022
    DOI: 10.1007/s44205-022-00008-9
  • P. Dietz, A. Reeh, K. Keil,  K. Holste, U. Probst, P. J. Klar, and C. Volkmar, "Global models for radio-frequency ion thrusters", EPJ Techniques and Instrumentation 8(10), 2021.
    DOI: 10.1140/epjti/s40485-021-00068-5 
  • L. J. Buntrock, C. Volkmar, and K. Hannemann, "Sputtering of Mo and Ag with xenon ions from a radio-frequency ion thruster", Review of Scientific Instruments 92(4), 045109, 2021.
    DOI: 10.1063/5.0031408
  • K. Holste, P. Dietz, S. Scharmann, K. Keil, T. Henning, D. Zschätzsch, M. Reitemeyer, B. Nauschütt, F. Kiefer, F. Kunze, J. Zorn, C. Heiliger, N. Joshi, U. Probst, R. Thüringer, C. Volkmar, D. Packan, S. Peterschmitt, K.-T. Brinkmann, H.-G. Zaunick, M. H. Thoma, M. Kretschmer, H. J. Leiter, S. Schippers, K. Hannemann, and P. J. Klar, "Ion thrusters for electric propulsion: Scientific issues developing a niche technology into a game changer", Review of Scientific Instruments 91(6), 061101, 2020.
    DOI: 10.1063/5.0010134
  • C. Volkmar, C. Geile, A. Neumann, and K. Hannemann, "Direct-current current transformer for the measurement of an electric propulsion ion beam", Review of Scientific Instruments 90(3), 033303, 2019.
    DOI: 10.1063/1.5087804
  • C. Volkmar, C. Geile, and K. Hannemann, "Radio-Frequency Ion Thrusters—Power Measurement and Power Distribution Modeling", Journal of Propulsion and Power 34(4), 1061, 2018.
    DOI: 10.2514/1.B36868
  • C. Volkmar, J. Simon, K. Holste, "Physik und Technik von Radiofrequenz-Ionentriebwerken", Vakuum in Forschung und Praxis 28(5), 33, 2016.
    DOI: 10.1002/vipr.201600624
  • C. Volkmar, U. Ricklefs, and P. J. Klar, "Self-Consistent Numerical 0D/3D Hybrid Modeling of Radio-Frequency Ion Thrusters", Transactions of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan 14(ists30), Pb_23, 2016.
    DOI: 10.2322/tastj.14.Pb_23
  • C. Volkmar and U. Ricklefs, "Implementation and Verification of a Hybrid Performance and Impedance Model of Gridded Radio-Frequency Ion Thrusters", The European Physical Journal D 69(10), 227, 2015.
    DOI: 10.1140/epjd/e2015-60380-4
  • C. Volkmar, J. Simon, and U. Ricklefs, "Numerical Determination of Induced Electric Eddy Fields Inside Arbitrarily Shaped Induction Coils", Journal of Physical Science and Application 4(4), 262, 2014.
    DOI: 10.17265/2159-5348/2014.04.006
  • C. Volkmar, T. Baruth, J. Simon, U. Ricklefs, and R. Thueringer, "Arbitrarily Shaped Coils' Inductance Simulation Based on a 3-Dimensional Solution of the Biot-Savart Law", Proceedings of the 36th International Spring Seminar on Electronics Technology, Alba Iulia, Romania, 210, IEEE, 2013.
    DOI: 10.1109/ISSE.2013.6648244

Konferenzbeiträge:

  • J. Ly, H. Blättermann, G. Kottke, M. Vaupel, J. L. Ibs, C. Volkmar, and G. Herdrich, "Development and Qualification of the 2U Iodine ACFT Propulsion Subsystem", Proceedings of the 39th International Electric Propulsion Conference, London, UK, 2025.
  • J. L. Ibs, C. Volkmar, H. Blättermann, N. G. Kottke, J. Ly, and M. Vaupel, "Development of a Power Processing Unit for the Advanced Cusp Field Thruster", Proceedings of the 39th International Electric Propulsion Conference, London, UK, 2025.
  • L. Henrich and C. Volkmar, "Approach to gauge the feasibility of capacitively coupled radio-frequency magnetic nozzle electric propulsion via global modelling", Proceedings of the 39th International Electric Propulsion Conference, London, UK, 2025.
  • E. Beller, C. Volkmar, and U. Probst, "Determination of thruster impedances in radio-frequency ion thrusters", Proceedings of the 38th International Electric Propulsion Conference, Toulouse, France, 2024.
  • L. Henrich, D. Becker, M. Sach, J. Frey, and C. Volkmar, "Adapting direct-current current transformers for contactless ion beam measurements of electric propulsion systems", Proceedings of the 38th International Electric Propulsion Conference, Toulouse, France, 2024.
  • P. Peters, U. Probst, and C. Volkmar, "Modeling Plasma Heating in Inductively Coupled Plasmas: A Fokker-Planck Approach", Proceedings of the 38th International Electric Propulsion Conference, Toulouse, France, 2024.
  • L. Henrich, E. Beller, J. Ibs, E. Jozsef, P. Peters, A. Reeh, Y. Rover, U. Probst, J. Simon, R. Thüringer, and C. Volkmar, "Overview of Activities at the Space Electronics Research Group in Giessen", Proceedings of the 9th Space Propulsion Conference, Glasgow, Scotland, 2024.
  • P. Peters, U. Probst, and C. Volkmar, "Optimizing Global Plasma Models: Incorporating Electron Energy Density Function for Enhanced Thruster Development Efficiency", Proceedings of the 9th Space Propulsion Conference, Glasgow, Scotland, 2024.
  • E. Beller, C. Roessler, C. Volkmar, and U. Probst, "Analysis of Class-E Power Amplifiers as Radio-Frequency Generators", Proceedings of the 37th International Electric Propulsion Conference, Boston, USA, 2022.
  • F. Kiefer, K. Holste, P. J. Klar, Y. Rover, U. Probst, and C. Volkmar, "Reverberation Chamber for Electromagnetic Compatibility Testing of Electric Thrusters", Proceedings of the 37th International Electric Propulsion Conference, Boston, USA, 2022.
  • Y. Rover, R. Thueringer, C. Volkmar, U. Probst, F. Kiefer, and P. J. Klar, "Semi-Anechoic Chamber for EMC Tests of EP thrusters", Proceedings of the 37th International Electric Propulsion Conference, Boston, USA, 2022.
  • Y. Rover and C. Volkmar, "Verification of a radio-frequency generator model in a full-wave 3D EM simulation", Proceedings of the IEEE Aerospace Conference 2022, Big Sky, USA, 2022.
    DOI: 10.1109/AERO53065.2022.9843355
  • L. J. Buntrock, C. Volkmar, J. Simon, A. Neumann, and K. Hannemann, "Quartz Crystal Microbalance-based Examination of Sputtering Phenomena of RF Ion Thrusters", Proceedings of the 2020 Space Propulsion Conference, Online Conference, 2021.
  • F. Kiefer, K. Holste, C. Volkmar, R. Thueringer, and P. J. Klar, "Reverberation test facility for electromagnetic compatibility testing of electric thrusters", Proceedings of the 8th Russian-German Conference on Electric Propulsion, Online, 2021.
  • R. Thueringer, T. Sommavilla, K. Holste, F. Kiefer, P. J. Klar, and C. Volkmar, "Test Facility for EMC-Characterization of Electric Thrusters in Operation using an evacuated Reverberation Chamber resp. an Anechoic Chamber with Vacuum Vessel and Honey Comb", Proceedings of the 36th International Electric Propulsion Conference, Vienna, Austria, 2019. 
  • A. Neumann, C. Volkmar, and K. Hannemann, "Challenges of Cryopumping EP-Propellants in DLR’s Electric Propulsion Test Facility", Proceedings of the 36th International Electric Propulsion Conference, Vienna, Austria, 2019. 
  • C. Volkmar, C. Geile, and K. Hannemann, "Fluxgate Magnetometer-based Determination of Ion Beam Current", Proceedings of the 2018 Space Propulsion Conference, Seville, Spain, 2018.
  • A. Neumann, C. Volkmar, C. Geile, and K. Hannemann, "Mitigation of Detrimental Electric Thruster Force Measurement Effects", Proceedings of the 35th International Electric Propulsion Conference, Atlanta, USA, 2017. 
  • C. Volkmar, A. Neumann, C. Geile, and K. Hannemann, "Real time in situ determination of inductively coupled power and numerical prediction of power distribution in RF ion thrusters", Proceedings of the 35th International Electric Propulsion Conference, Atlanta, USA, 2017.
  • J. Simon, C. Volkmar, and U. Probst, "High-Precision Power Measurement for Accurate Characterization of RF Ion Thrusters", Proceedings of the 2016 Space Propulsion Conference, Rome, Italy, 2016.
  • C. Volkmar, U. Ricklefs, and P. J. Klar, "Self-Consistent Numerical 1D/3D Hybrid Modeling of Radio-Frequency Ion Thrusters", Proceedings of the 34th International Electric Propulsion Conference, Kobe-Hyogo, Japan, 2015.
  • C. Volkmar and U. Ricklefs, "Self-Consistent Equivalent Circuit Diagram Modeling of a Radio-Frequency Ion Thruster Based on a 3D Inductively-Coupled Plasma Solver", Proceedings of the 5th Russian-German Conference on Electric Propulsion, Dresden, Germany, 2014.
  • C. Volkmar and U. Ricklefs, "Modeling of Electrical Parameters of an Inductively-Coupled Plasma Generator in 3-Dimensional Cartesian Space", Proceedings of the 2014 Space Propulsion Conference, Cologne, Germany, 2014.
  • C. Volkmar, J. Simon, and U. Ricklefs, "Numerical Determination of Induced Electric Eddy Fields Inside Arbitrarily Shaped Induction Coils", Proceedings of the 33rd International Electric Propulsion Conference, Washington, D. C., USA, 2013.

Patente:

  • C. Volkmar und U. Ricklefs, Induktionsheizspule, Patentschrift EP3145275B1, angemeldet (EU) am 18.09.2015, veröffentlicht am 22.03.2017, erteilt am 20.04.2022.