Microwave Technology

Research and design of microwave solutions for fusion plasma experiments

Main fields of research

In present-day fusion experiments, Electron Cyclotron Resonance Heating (ECRH) with microwaves in the range of 28 - 170 GHz at megawatt power levels are routinely used to heat plasma, to drive plasma currents and to control magnetohydrodynamic instabilities. IGVP contributes to the development of microwave heating and diagnostic components, the experimental application of the devices and the interpretation of experimental results.

For the transmission of high-power millimetre waves, oversized waveguides as well as quasi-optical transmission lines are used. IGVP designs, simulates and tests novel microwave components as well as complete transmission systems for various fusion experiments as e.g. Wendelstein 7-X, ASDEX Upgrade or ITER. IGVP develops power combiners and switches which will allow to enhance the performance of the fusion test reactor ITER. The high-power microwaves are generated by gyrotrons. At IGVP, high-voltage power supplies are designed and built, which fulfill the strict requirements of gyrotrons.

IGVP is also involved in the experiments relying on the microwave devices. On ASDEX Upgrade, the ECR heating process and the influence of ECR current drive on neoclassical tearing modes are investigated. In support of various fusion experiments, IGVP carries out full-wave simulations to study wave propagation and mode conversion in plasmas. Microwaves are also widely used for diagnosing high-temperature fusion plasmas and IGVP contributes to the Doppler reflectometry diagnostics for turbulence and flow investigations through the design of components and simulations of experimental data.

Publications

  1. 2023

    1. Hentrich, A. ; Plaum, B. ; Killinger, A. ; Tovar, G.: Further optimization of resonant GHz wave absorption coatings. In: 2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2023, S. 1–2
    2. Plaum, Burkhard: Monte Carlo evaluation of the effects of higher order modes in high-power millimeter-wave systems. In: Proceedings of the 48th International Conference on Infrared Millimeter and Terahertz Waves (IRMMW-THz), Proceedings of the 48th International Conference on Infrared Millimeter and Terahertz Waves (IRMMW-THz). (2023)
    3. Plaum, Burkhard: Estimation of the Effects of Spurious Modes in Linear Microwave Systems Using a Monte Carlo Algorithm. In: IEEE Journal of Microwaves, IEEE Journal of Microwaves. Bd. 3 (2023), Nr. 3, S. 1061–1067
    4. Frank, A ; Höfler, K ; Happel, T ; Görler, T ; Lechte, C ; Stroth, U ; the ASDEX Upgrade Team: Impact of the turbulence wavenumber spectrum and probing beam geometry on Doppler reflectometry perpendicular velocity measurements. In: Plasma Physics and Controlled Fusion, Plasma Physics and Controlled Fusion. Bd. 65, IOP Publishing (2023), Nr. 6, S. 065010
    5. Plaum, Burkhard ; Preynas, Mélanie ; Choe, Munseok: Calculations for the optical system for the first ITER plasma. In: Poli, E. ; Liu, Y. ; Udintsev, V. (Hrsg.) EPJ Web of Conferences, EPJ Web of Conferences. Bd. 277, EDP Sciences (2023), S. 01005
    6. Wagner, Dietmar ; Kasparek, Walter ; Leuterer, Fritz ; Monaco, Francesco ; Plaum, Burkhard ; Ruess, Tobias ; Schütz, Harald ; Stober, Jörg ; u. a.: Single- and Two-Frequency Sub-THz Waveguide Notch Filters With Rejection Frequencies Within and Beyond the Passband. In: IEEE Transactions on Microwave Theory and Techniques, IEEE Transactions on Microwave Theory and Techniques. Bd. 71 (2023), Nr. 6, S. 2558–2566
    7. Lechte, C. ; Happel, T. ; Höfler, K. ; Görler, T. ; Frank, A. ; the ASDEX Upgrade Team: Synthetic Fullwave Doppler Reflectometry Diagnostic for Fusion Experiments, 2023. — EPS 49th Conference on Plasma Physics
    8. Hentrich, Andreas: Simulation and reflectivity measurements of the ITER first plasma beam dump material. In: Poli, E. ; Liu, Y. ; Udintsev, V. (Hrsg.) EPJ Web of Conferences, EPJ Web of Conferences. Bd. 277, EDP Sciences (2023), S. 02009
  2. 2022

    1. Hentrich, Andreas ; Garcia, Venancio Martinez ; Killinger, Andreas ; Plaum, Burkhard ; Lechte, Carsten ; Tovar, Günter E.M.: Resonant Atmospheric Plasma-Sprayed Ceramic Layers Effectively absorb Microwaves at 170 GHz. In: Journal of Infrared, Millimeter, and Terahertz Waves, Journal of Infrared, Millimeter, and Terahertz Waves. Bd. 43, Springer (2022), Nr. 5–6, S. 349--365
    2. Wagner, D. ; Kasparek, W. ; Leuterer, F. ; Monaco, F. ; Plaum, B. ; Ruess, T. ; Schütz, H. ; Stober, J. ; u. a.: Single- and Two-Frequency Sub-THz Notch Filters with Rejection Frequencies Within and Beyond the Pass Band. In: IEEE Transactions on Microwave Theory and Techniques, IEEE Transactions on Microwave Theory and Techniques. (2022). — submitted
    3. Lechte, Carsten: Mikrowellen-Simulationen am IGVP -- Für Technologie und Fusionsforschung, Zenodo (2022)
    4. Lechte, C. ; Happel, T. ; Höfler, K. ; Görler, T. ; Frank, A. ; Conway, G.D. ; the ASDEX Upgrade Team: Fullwave Doppler Reflectometry Simulations Coupled with GENE Plasma Turbulence Simulations. In: Proceedings of the 15th International Reflectometry Workshop for fusion plasma diagnostics (IRW15), Proceedings of the 15th International Reflectometry Workshop for fusion plasma diagnostics (IRW15), 2022
    5. Plaum, Burkhard: Simulation of microwave beams with PROFUSION : Universität Stuttgart, 2022
  3. 2021

    1. Fanale, F. ; Bruschi, A. ; Darcourt, O. ; Farina, D. ; Figini, L. ; Gandini, F. ; Henderson, M. ; Hunt, R. ; u. a.: Design validation of in-vessel mirrors and beam dump for first plasma operations in ITER. In: Fusion Engineering and Design, Fusion Engineering and Design. Bd. 172, Elsevier BV (2021), S. 112717
    2. Lips, J. ; Heuraux, S. ; Lechte, C. ; Plaum, B.: On frequency-independent horn antenna design for plasma positioning reflectometers, from simulation to prototype testing. In: Journal of Instrumentation, Journal of Instrumentation. Bd. 16, IOP Publishing (2021), Nr. 07, S. P07040
    3. Corre, Y. ; Gaspar, J. ; Marsen, S. ; Moseev, D. ; Stange, T. ; Boscary, J. ; Drewelow, P. ; Gao, Y. ; u. a.: Thermographic reconstruction of heat load on the first wall of Wendelstein 7-X due to ECRH shine-through power Bd. 61, IOP Publishing (2021), Nr. 6, S. 066002
    4. Lechte, C. ; Plaum, B. ; others: Contributions to the New ECRH system for MAST-U. Online, 2021. — 33rd Joint Russian-German Workshop on ECRH and Gyrotrons
  4. 2020

    1. Moseev, D. ; Laqua, H.P. ; Stange, T. ; Abramovic, I. ; Nielsen, S.K. ; Äkäslompolo, S. ; Avramidis, K. ; Braune, H. ; u. a.: Collective Thomson Scattering Diagnostic for Wendelstein 7-X at 175 GHz. In: Journal of Instrumentation, Journal of Instrumentation. Bd. 15, IOP Publishing (2020), Nr. 05, S. C05035--C05035
    2. Lechte, C. ; Broekens, K. ; Bruschi, A. ; Fanale, F. ; Idei, H. ; Kajiwara, K. ; Kasparek, W. ; Klop, W. ; u. a.: Advanced ECRH components for ITER: Fast switches and reflector gratings. Online, 2020. — 32nd Joint Russian-German Workshop on ECRH and Gyrotrons
    3. Krutkin, O. L. ; Altukhov, A.B. ; Gurchenko, A.D. ; Gusakov, E.Z. ; Heuraux, S. ; end L.A. Esipov, M.A. Irzak ; Kiviniemi, T.P. ; Lechte, C. ; u. a.: Investigation of nonlinear effects in Doppler reflectometry using full-wave synthetic diagnostics. In: Plasma Science and Technology, Plasma Science and Technology. Bd. 22, IOP Publishing (2020), Nr. 6, S. 064001
    4. Bulanin, V. V. ; Gusakov, E. Z. ; Gusev, V. K. ; Zadvitskiy, G. ; Lechte, C. ; Heuraux, S. ; Minaev, V. B. ; Petrov, A. V. ; u. a.: Full-Wave Modeling of Doppler Backscattering from Filaments. In: Plasma Physics Reports, Plasma Physics Reports. Bd. 46 (2020), S. 490–495
    5. Lechte, C. ; Conway, G.D. ; Görler, T. ; Happel, T. ; the ASDEX Upgrade Team: Fullwave Doppler Reflectometry Simulations for Density Turbulence Spectra in ASDEX Upgrade Using GENE and IPF-FD3D. In: Plasma Sci. Technol., Plasma Sci. Technol. (2020), Nr. 22, S. 064006
  5. 2019

    1. Moseev, D. ; Stejner, M. ; Stange, T. ; Abramovic, I. ; Laqua, H. P. ; Marsen, S. ; Schneider, N. ; Braune, H. ; u. a.: Collective Thomson scattering diagnostic at Wendelstein 7-X. In: Rev. Sci. Instrum., Rev. Sci. Instrum. Bd. 90 (2019), S. 013503
    2. Krutkin, Oleg ; Altukhov, Alexey ; Gurchenko, Alexey ; Gusakov, Evgeniy ; Irzak, Michael ; Esipov, Lev ; Sidorov, Anton ; Chôné, Laurent ; u. a.: Validation of full-f global gyrokinetic modeling results against the FT-2 tokamak Doppler reflectometry data using synthetic diagnostics. In: Nucl. Fusion, Nucl. Fusion. Bd. 59 (2019), Nr. 096017
    3. Lechte, C. ; Conway, G.D. ; Görler, T. ; Happel, T. ; the ASDEX Upgrade Team: Fullwave Doppler Reflectometry Simulations for Turbulence Spectra Using GENE and IPF-FD3D. In: Proceedings of the 14th International Reflectometry Workshop (IRW14), Proceedings of the 14th International Reflectometry Workshop (IRW14), 2019
    4. Lechte, C. ; Kasparek, W. ; Plaum, B. ; Schubert, M. ; Stober, J.: 3D Simulation Of The Performance Of Reflector Gratings For High Power MM Waves. Lenggries, Germany, 2019. — 31st Joint Russian-German Workshop on ECRH and Gyrotrons
    5. Conway, G. D. ; Lechte, C. ; Poli, E. ; Maj, O. ; the ASDEX Upgrade Team: Recent progress in modelling the resolution and localization of Doppler reflectometry measurements. In: Proceedings of the 14th International Reflectometry Workshop (IRW14), Proceedings of the 14th International Reflectometry Workshop (IRW14), 2019
  6. 2018

    1. Wolf, R C ; Bozhenkov, S ; Dinklage, A ; Fuchert, G ; Kazakov, Y O ; Laqua, H P ; Marsen, S ; Marushchenko, N B ; u. a.: Electron-cyclotron-resonance heating in Wendelstein 7-X: A versatile heating and current-drive method and a tool for in-depth physics studies. In: Plasma Physics and Controlled Fusion, Plasma Physics and Controlled Fusion. Bd. 61, IOP Publishing (2018), Nr. 1, S. 014037
    2. Windisch, T. ; Wolf, S. ; Weir, G. M. ; Bozhenkov, S. A. ; Damm, H. ; Fuchert, G. ; Grulke, O. ; Hirsch, M. ; u. a.: Phased array Doppler reflectometry at Wendelstein 7-X. In: Review of Scientific Instruments, Review of Scientific Instruments. Bd. 89, AIP Publishing (2018), Nr. 10, S. 10H115
    3. Zach, Alexander ; Kasparek, Walter ; Lechte, Carsten ; Plaum, Burkhard ; Monaco, Francesco ; Schütz, Harald ; Stober, Jörg ; Idei, Hiroshi ; u. a.: In-situ real-time monitoring of spurious modes in HE11 transmission lines using multi-hole couplers in miter bends. In: EPJ Web Conf., EPJ Web Conf. (2018). — 20th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating
    4. Lechte, C. ; Conway, G. D. ; Görler, T. ; Happel, T. ; Tröster-Schmid, C. ; the ASDEX Upgrade Team: Using Fullwave Simulations to Understand the Turbulent Wavenumber Spectrum Measured by Doppler Reflectometry. In: EPJ Web Conf., EPJ Web Conf. (2018). — 30th German-Russian Joint Meeting on ECRH and Gyrotrons (RGM2018)
    5. Zadvitskiy, G V ; Heuraux, S ; Lechte, C ; Hacquin, S ; Sabot, R: Edge turbulence effect on ultra-fast swept reflectometry core measurements in tokamak plasmas. In: Plasma Physics and Controlled Fusion, Plasma Physics and Controlled Fusion. Bd. 60 (2018), Nr. 2, S. 025025
    6. Plaum, Burkhard: Optimization of Broadband Smooth-Wall Circular Horn Antennas. In: Journal of Infrared Millimeter and Terahertz Waves, Journal of Infrared Millimeter and Terahertz Waves. Bd. 39, Springer (2018), Nr. 10, S. 984–995
    7. Wolf, R. C. ; Bozhenkov, S. ; Dinklage, A. ; Fuchert, G. ; Laqua, H. P. ; Marsen, S. ; Marushchenko, N. B. ; Stange, T. ; u. a.: Electron-cyclotron-resonance heating in Wendelstein 7-X: A versatile heating and current-drive method and a tool for in-depth physics studies. In: Plasma Phys. Contr. Fusion, Plasma Phys. Contr. Fusion. (2018). — accepted
    8. Altukhov, A. ; Gurchenko, A. ; Gusakov, E. ; Irzak, M. ; Krutkin, O. ; Esipov, L. ; Niskala, P. ; Kiviniemi, T.P. ; u. a.: Benchmarking of Full-f Global Gyrokinetic Modeling Results Against the FT-2 Tokamak Doppler Reflectometry Data Using Synthetic Diagnostics. In: IEEE Conference Proceedings, IEEE Conference Proceedings, 2018. — submitted
    9. Plaum, B. ; Schubert, M. ; Zeitler, A. ; Kasparek, W. ; Lechte, C. ; Stober, J. ; the ASDEX Upgrade Team: Synthesis of reflection gratings for advanced plasma heating scenarios. In: EPJ Web Conf., EPJ Web Conf. (2018). — 30th German-Russian Joint Meeting on ECRH and Gyrotrons (RGM2018)
    10. Plaum, B. ; Schubert, M. ; Zeitler, A. ; Kasparek, W. ; Lechte, C. ; Stober, J. ; the ASDEX Upgrade Team: Development of reflection gratings for advanced ECRH scenarios. In: EPJ Web Conf., EPJ Web Conf. (2018). — 20th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating
    11. Lechte, Carsten: Doppler Reflectometry Graphical Demonstration Movie Simulated With IPF-FD3D (2018)
    12. Krutkin, O. L. ; Gusakov, E. Z. ; Heuraux, S. ; Lechte, C.: Nonlinear Doppler reflectometry power response. Analytical predictions and full-wave modelling. In: Plasma Phys. Contr. Fusion, Plasma Phys. Contr. Fusion. (2018). — submitted
    13. Lechte, C. ; Kasparek, W. ; Plaum, B. ; Leuterer, F. ; Schubert, M. ; Stober, J. ; Wagner, D.: Simulation of Polarising and Reflecting Gratings for High Power mm Waves. In: EPJ Web Conf., EPJ Web Conf. (2018). — 20th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating
  7. 2017

    1. Krutkin, O. L. ; Altukhov, A. B. ; Gurchenko, A. D. ; Gusakov, E. Z. ; Heuraux, S. ; Irzak, M. A. ; Niskala, P. ; Zadvitskiy, G. ; u. a.: Synthetic radial correlation Doppler reflectometry diagnostic for FT-2 tokamak. In: , 2017. — 44th EPS Conf. on Plasma Phys. (Belfast) 26 - 30th June 2017
    2. Zadvitskiy, G. V. ; Heuraux, S. ; Lechte, C. ; Hacquin, S. ; Sabot, R.: Edge turbulence effects on core radial k-spectrum extracted from reflectometry data. In: , 2017. — 44th EPS Conf. on Plasma Phys. (Belfast) 26 - 30th June 2017
    3. Conway, G. D. ; Lechte, C. ; Hennequin, P. ; Simon, P. ; the ASDEX Upgrade Team: Investigation of turbulence properties via spectral broadening of Doppler reflectometry signals in ASDEX Upgrade. In: , 2017. — 44th EPS Conf. on Plasma Phys. (Belfast) 26 - 30th June 2017
    4. Lechte, C. ; Conway, G. D. ; Görler, T. ; Tröster, C. ; the ASDEX Upgrade Team: Doppler Reflectometry $k$-spectral measurements in ASDEX Upgrade: Experiments and simulations. In: Plasma Phys. Contr. Fusion, Plasma Phys. Contr. Fusion. Bd. 59 (2017), Nr. 7, S. 075006
    5. Zach, A. ; Plaum, B. ; Kasparek, W. ; Lechte, C. ; Zeitler, A. ; Roth, B. ; Stober, J. ; Wagner, D. ; u. a.: New Developments for EC Heating diagnostics. In: EPJ Web of Conferences, EPJ Web of Conferences. Bd. 147 (2017). — Proceedings of the EC-19 Workshop, to be published
    6. Lechte, C. ; Conway, G.D. ; Görler, T. ; Tröster, C. ; the ASDEX Upgrade Team: Using Fullwave Simulations to Understand the Turbulent Wavenumber Spectrum Measured by Doppler Reflectometry, 2017. — 29th Joint Russian-German Workshop on ECRH and Gyrotrons (STC-Meeting)
    7. Leuterer, F. ; Wagner, D. ; Stober, J. ; Kasparek, W. ; Lechte, C. ; ASDEX Upgrade Team: Experimental Study of Ohmic Losses of Polarizer Mirror Systems. In: EPJ Web Conf., EPJ Web Conf. Bd. 149 (2017), S. 03002
    8. Happel, T. ; Görler, T. ; Lechte, C. ; Bernert, M. ; Conway, G. D. ; Freethy, S. J. ; Hennequin, P. ; Honoré, C. ; u. a.: Comparison of detailed experimental wavenumber spectra with gyrokinetic simulation aided by two-dimensional full-wave simulations. In: Plasma Phys. Contr. Fusion, Plasma Phys. Contr. Fusion. Bd. 59 (2017), Nr. 5, S. 054009
    9. Ioannidis, Z. C. ; Rzesnicki, T. ; Albajar, F. ; Alberti, S. ; Avramidis, K. A. ; Bin, W. ; Bonicelli, T. ; Bruschi, A. ; u. a.: CW Experiments With the EU 1-MW, 170-GHz Industrial Prototype Gyrotron for ITER at KIT. In: IEEE Transactions on Electron Devices, IEEE Transactions on Electron Devices. Bd. 64 (2017), Nr. 9, S. 3885--3892
    10. Lechte, C. ; Kasparek, W. ; Plaum, B. ; Zeitler, A. ; Erckmann, V. ; Laqua, H. ; Schneider, N. ; Weissgerber, M. ; u. a.: Remote-Steering Antennas for 140 GHz Electron Cyclotron Heating of the Stellarator W7-X. In: EPJ Web Conf., EPJ Web Conf. Bd. 147 (2017), Nr. 04004, S. 5. — 19th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating
  8. 2016

    1. Lechte, C. ; Kasparek, W. ; Plaum, B. ; Roth, B. ; Zeitler, A. ; Laqua, H. ; Wagner, D.: Water-cooled cw loads for high-power millimetre waves. Leinsweiler, Germany, 2016. — US-EU-JPN RF Heating Technology Workshop
    2. Lechte, C. ; Kasparek, W. ; Plaum, B. ; Zeitler, A. ; Erckmann, V. ; Laqua, H. ; Schneider, N. ; Weissgerber, M. ; u. a.: Remote-Steering Antennas for 140 GHz Electron Cyclotron Heating of the Stellarator W7-X, 2016. — 28th Joint Russian-German Workshop on ECRH and Gyrotrons (STC-Meeting)
    3. Zadvitskiy, G. ; Heuraux, S. ; Lechte, C. ; Hacquin, S. ; Sabot, R. ; Gusakov, E. Z. ; Popov, A. Yu.: On the possibility to use a fast 2D interpretative model for analysis of fusion plasma turbulence from reflectometry data. In: , 2016. — Proceedings of EPS 43rd Conference on Plasma Physics
    4. Hogge, J.-P. ; Albajar, F. ; Alberti, S. ; Avramidis, K. ; Bin, W. ; Bonicelli, T. ; Braunmueller, F. ; Bruschi, A. ; u. a.: Status and Experimental Results of the European 1 MW, 170 GHz Industrial CW Prototype Gyrotron for ITER. In: , 2016. — Proceedings of the IRMMW-THz Conference
    5. Lechte, C. ; Conway, G. D. ; Görler, T. ; Tröster, C. ; the ASDEX Upgrade Team: Doppler Reflectometry Simulations for ASDEX Upgrade and Comparison with Experiment, 2016. — 28th Joint Russian-German Workshop on ECRH and Gyrotrons (STC-Meeting)
    6. Zadvitskiy, G. ; Heuraux, S. ; Lechte, C. ; Hacquin, S. ; Sabot, R. ; Clairet, F.: On the possibility to use a fast 2D interpretative model for analysis of fusion plasma turbulence from reflectometry data, 2016. — EPS 43rd Conference on Plasma Physics
    7. Wagner, D. ; Stober, J. ; Leuterer, F. ; Monaco, F. ; Müller, S. ; Münich, M. ; Rapson, C. J. ; Reich, M. ; u. a.: Status, Operation, and Extension of the ECRH System at ASDEX Upgrade. In: Journal of infrared millimeter and terahertz waves, Journal of infrared millimeter and terahertz waves. Bd. 37, Springer (2016), Nr. 1, S. 45–54
    8. Venkateswaran, Vandana Revathi ; Lechte, Carsten ; Hirth, Thomas: Investigation of the influence of the plasma temperature on Doppler reflectometry, 2016. — DPG Frühjahrstagung der Sektion Plasmaphysik
    9. Lechte, C. ; Conway, G. D. ; Görler, T. ; Tröster, C. ; the ASDEX Upgrade Team: Simulation of Doppler Reflectometry in ASDEX Upgrade and Comparison with Experiment, 2016. — EPS 43rd Conference on Plasma Physics
  9. 2015

    1. Lechte, C. ; Conway, G. D. ; Görler, T. ; Tröster, C. ; the ASDEX Upgrade Team: Fullwave Doppler Reflectometry Simulations, 2015. — 27th Joint Russian-German Workshop on ECRH and Gyrotrons (STC-Meeting)
    2. C. Lechte and G. D. Conway and T. Görler and C. Tröster and the ASDEX Upgrade Team: Full-Wave Doppler Reflectometry Simulations for ASDEX Upgrade, 2015. — The 11th International Reflectometry Workshop (IRW12)
    3. Lechte, C. ; Conway, G. D. ; Görler, T. ; Tröster, C. ; the ASDEX Upgrade Team: Doppler Reflectometry Simulations for ASDEX Upgrade, 2015. — $1^$st IAEA Technical Meeting on “Fusion Data Processing, Validation and Analysis”
    4. Plaum, Burkhard ; Lechte, Carsten ; Kasparek, Walter ; Gaiser, Sandra ; Zeitler, Achim ; Erckmann, V. ; Weißgerber, M. ; Bechtold, A. ; u. a.: Design of a remote steering antenna for ECRH heating in the stellarator Wendelstein 7-X. In: Proceedings of the 28th Symposium On Fusion Technology (SOFT-28), Proceedings of the 28th Symposium On Fusion Technology (SOFT-28). Bd. A : Elsevier, 2015, S. 568–572
    5. Stroth, U. ; Navarro, A. Banon ; Conway, G. D. ; Görler, T. ; Happel, T. ; Hennequin, P. ; Lechte, C. ; Manz, P. ; u. a.: Experimental turbulence studies for gyro-kinetic code validation using advanced microwave diagnostics. In: Nuclear Fusion, Nuclear Fusion. Bd. 55 (2015), Nr. 8, S. 083027
  10. 2014

    1. Lechte, C. ; Conway, G. D. ; Görler, T. ; Tröster, C. ; the ASDEX Upgrade Team: Doppler Reflectometry Simulations for ASDEX Upgrade, 2014. — Talk at the 41st EPS Conference on Plasma Physics
  11. 2013

    1. Lechte, C. ; Plaum, B. ; Kasparek, W. ; Zeitler, A. ; Erckmann, V. ; Laqua, H. ; Weißgerber, M. ; Bechtold, A. ; u. a.: Remote-Steering Launchers for the ECRH System on the Stellarator W7-X, 2013. — 25th Joint Russian-German Workshop on ECRH and Gyrotrons (STC-Meeting)
    2. Lechte, C.: ERC3D, a 3-Dimensional Reflectometry Code for EFDA-ITM, 2013. — The 11th International Reflectometry Workshop (IRW11)
    3. Geiger, J ; Wolf, R C ; Beidler, C ; Cardella, A ; Chlechowitz, E ; Erckmann, V ; Gantenbein, G ; Hathiramani, D ; u. a.: Aspects of steady-state operation of the Wendelstein 7-X stellarator. In: Plasma Physics and Controlled Fusion, Plasma Physics and Controlled Fusion. Bd. 55 (2013), Nr. 1, S. 014006
    4. Lechte, C. ; Conway, G. D. ; Görler, T. ; Tröster, C. ; Volk, A. ; the ASDEX Upgrade Team: Full-Wave Doppler Reflectometry Simulations for ASDEX Upgrade. In: Proceedings of the 11th International Reflectometry Workshop (IRW11), Proceedings of the 11th International Reflectometry Workshop (IRW11), 2013
  12. 2012

    1. Plaum, Burkhard ; Lechte, Carsten ; Kasparek, Walter: Optimization of optical ECRH components with free space mode mixtures, 2012. — US--EU--Japan RF Heating Technology Workshop, Nara, Japan
    2. Lechte, Carsten ; Idei, Hiroshi ; Kasparek, Walter ; Plaum, Burkhard ; Ruiz, Juan ; Tretiak, Dina: A Five-Port Mitre Bend Coupler System For In-Situ Measurement Of Higher-Order Waveguide Modes, 2012. — US−EU−Japan RF Heating Technology Workshop, Nara, Japan
    3. Lechte, Carsten ; Conway, Garrard ; Görler, Tobias: Untersuchung der Doppler-Reflektometrie mit Fullwave-Simulationen, 2012. — DPG-Frühjahrstagung 2012 in Stuttgart
    4. Jelonnek, J. ; Braune, H. ; Dammertz, G. ; Erckmann, V. ; Flamm, J. ; Gantenbein, G. ; Hollmann, F. ; Jonitz, L. ; u. a.: Progress on 140 GHz, 1 MW, CW Series Gyrotrons for W7-X. In: 37th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2012, September 23--28, 37th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2012, September 23--28. Wollongong, Australia, 2012
    5. Ruiz, Juan ; Kasparek, Walter ; Lechte, Carsten ; Plaum, Burkhard ; Idei, Hiroshi: Numerical and experimental investigation of a 5-port mitre-bend directional coupler for mode analysis in corrugated waveguides. In: Journal of Infrared, Millimeter, and Terahertz Waves, Journal of Infrared, Millimeter, and Terahertz Waves. Bd. 33, Springer US (2012), Nr. 5, S. 491--504
    6. Wagner, D. ; Stober, J. ; Honecker, F. ; Leuterer, F. ; Monaco, F. ; Müller, S. ; Münich, M. ; Reich, M. ; u. a.: The broadband multi-Megawatt ECRH system at ASDEX Upgrade. In: 37th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2012, September 23--28, 37th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2012, September 23--28. Wollongong, Australia, 2012
    7. Kasparek, W. ; Plaum, B. ; Lechte, C. ; Filipovic, E. ; Erckmann, V. ; Grünwald, G. ; Hollmann, F. ; Maraschek, M. ; u. a.: Status of Resonant Diplexer Development for high-power ECRH Applications. In: EPJ Web of Conferences, EPJ Web of Conferences. Bd. 32 (2012), S. 04008. — 17th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, Deurne, 12 - 17 May 2012
    8. Plaum, B. ; Kasparek, W. ; Lechte, C. ; Ruiz, J. ; Tretiak, D. ; Idei, H.: In-situ characterization of spurious modes in HE$_11$ transmission lines with a 5-port coupler. In: EPJ Web of Conferences, EPJ Web of Conferences. Bd. 32 (2012), S. 04010. — 17th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, Deurne, 12 - 17 May 2012
    9. Erckmann, V. ; Kasparek, W. ; Plaum, B. ; Lechte, C. ; Petelin, M. I. ; Braune, H. ; Gantenbein, G. ; Laqua, H. P. ; u. a.: Large Scale CW ECRH Systems: Some considerations. In: EPJ Web of Conferences, EPJ Web of Conferences. Bd. 32 (2012), S. 04006. — 17th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, Deurne, 12 - 17 May 2012
    10. Pfannmöller, J. P. ; Lechte, C. ; Grulke, O. ; Klinger, T.: Investigations on loop antenna excited whistler waves in a cylindrical plasma based on laboratory experiments and simulations. In: Physics of Plasmas, Physics of Plasmas. Bd. 19, AIP (2012), Nr. 10, S. 102113
  13. 2011

    1. Lechte, C. ; Conway, G. ; Goerler, T.: Simulation of Doppler Reflectometry for Density Fluctuation Diagnostics, 2011. — Séminaire GT ITER, Laboratoire Jacques-Louis Lions, Université Pierre et Marie Curie (Paris 6), Paris, France
    2. Lechte, C.: Remote Steering Optimisation for W7-X and Reflectometry Simulations in the Presence of Turbulence, 2011. — Kyushu/Okinawa/Yamaguchi Branch of the Japan Society of Plasma Science and Nuclear Fusion Research Special Seminar at Kyushu University, Fukuoka, Japan
    3. Lechte, C. ; Conway, G. ; Goerler, T.: Doppler Reflectometry Investigations With The Fullwave Code IPF-FD3D, 2011. — 28th JSPF Annual Meeting /The 29th Symposium on Plasma Processing / The Physical Society of Japan, 2011 Autumn Meeting: Plasma Conference 2011 (PLASMA2011)
    4. Lechte, C. ; Kumrić, H.: Simulation of a Plasma-Filled Horn Antenna With Improved Radiation Pattern. In: Plasma Science, IEEE Transactions on, Plasma Science, IEEE Transactions on. Bd. 39 (2011), Nr. 11, S. 2488--2489
    5. Lechte, C. ; Conway, G.: Doppler Reflectometry Investigations With The Fullwave Code IPF-FD3D, 2011. — 10th International Reflectometry Workshop, Padova, Italy
    6. Lechte, C.: Simulation von Doppler-Reflektometrie in turbulenten Plasmen, 2011. — DPG-Frühjahrstagung 2011 in Kiel
    7. Erckmann, V. ; Kasparek, W. ; Plaum, B. ; Lechte, C. ; Petelin, M. I. ; Bruschi, A. ; D’Arcangelo, O. ; Bin, W. ; u. a.: Large Scale CW ECRH Systems: Meeting a Challenge. Radio Frequency Power in Plasmas. In: Proc. 19th Topical Conference, Proc. 19th Topical Conference. Bd. 1406. Newport, RI, USA, 2011, S. 165
    8. Gantenbein, Gerd ; Erckmann, Volker ; Illy, Stefan ; Kern, Stefan ; Kasparek, Walter ; Lechte, Carsten ; Leonhardt, Wolfgang ; Liévin, Christophe ; u. a.: 140 GHz, 1 MW CW Gyrotron Development for Fusion Applications -- Progress and Recent Results. In: Journal of Infrared, Millimeter and Terahertz Waves, Journal of Infrared, Millimeter and Terahertz Waves. Bd. 32, Springer New York (2011), Nr. 3, S. 320--328
    9. Plaum, B. ; Holzhauer, E. ; Lechte, C.: Numerical Calculation of Reflection Characteristics of Grooved Surfaces with a 2D FDTD Algorithm. In: Journal of Infrared, Millimeter and Terahertz Waves, Journal of Infrared, Millimeter and Terahertz Waves. Bd. 32, Springer New York (2011), Nr. 4, S. 482--495. — 10.1007/s10762-011-9778-5
    10. Wagner, D. ; Stober, J. ; Leuterer, F. ; Monaco, F. ; Münich, M. ; Schmid-Lorch, D. ; Schütz, H. ; Zohm, H. ; u. a.: Recent Upgrades and Extensions of the ASDEX Upgrade ECRH System. In: Journal of Infrared, Millimeter and Terahertz Waves, Special Issue: Gyrotrons, Journal of Infrared, Millimeter and Terahertz Waves, Special Issue: Gyrotrons. Bd. 32 (2011), S. 274--282
  14. 2010

    1. Lechte, Carsten: Fullwave Simulation of Doppler Reflectometry in The Presence of Turbulence, 2010. — International Conference on Plasma Diagnostics, April 12--16, 2010, Pont-à-Mousson, France
  15. 2009

    1. Conway, G. D. ; Troester, C. ; Suttrop, W. ; Schirmer, J. ; Poli, E. ; Lechte, C. ; Zohm, H. ; ASDEX Upgrade Team: Turbulence measurements using Doppler reflectometry on ASDEX Upgrade. In: None, None. (2009)
    2. Lechte, C.: Investigation of the Scattering Efficiency in Doppler Reflectometry by Two-Dimensional Full-Wave Simulations. In: IEEE Trans. Plasma Sci., IEEE Trans. Plasma Sci. Bd. 37 (2009), Nr. 6
  16. 2008

    1. Lechte, C. ; Conway, G. ; Stroth, U.: Simulation of Doppler Reflectometry in Turbulent Plasmas, 2008. — 35th IEEE International Conference on Plasma Science
    2. Lechte, C. ; Conway, G. ; Stroth, U.: Winkelabhängigkeit der reflektierten Leistung bei Doppler-Reflektometrie in turbulenten Plasmen, 2008. — DPG Frühjahrstagung in Darmstadt
    3. Conway, G. D. ; Tröster, C. ; Schirmer, J. ; Suttrop, W. ; Lechte, C. ; Holzhauer, E. ; Scott, B. ; Poli, E. ; u. a.: Turbulence and geodesic acoustic mode behavioural studies in ASDEX Upgrade using Doppler Reflectometry. In: ??, ?? (2008)
    4. Erckmann, V. ; Brand, P. ; Braune, H. ; Gantenbein, G. ; Kasparek, W. ; Laqua, H. P. ; Lechte, C. ; Marushchenko, N. B. ; u. a.: The 10 MW, cw, ECRH-Plant for W7-X: Status and High Power Performance. In: SMSA2008 Boat Conference, SMSA2008 Boat Conference, 2008
  17. 2007

    1. Lechte, C. ; Holzhauer, E. ; Stroth, U. ; Conway, G.: Full Wave Doppler Reflectometry Simulations in 2D. In: Proceedings of the 8th International Reflectometer Workshop in St. Petersburg, Russia, Proceedings of the 8th International Reflectometer Workshop in St. Petersburg, Russia, 2007
  18. 2006

    1. Plaum, B. ; Gantenbein, G. ; Kasparek, W. ; Schwörer, K. ; Grünert, M. ; Braune, H. ; Erckmann, V. ; Hollmann, F. ; u. a.: High-Power Tests of a Remote-Steering Antenna at 140 GHz. In: Fusion Science and Technology, Fusion Science and Technology. Bd. 50, Taylor & Francis (2006), Nr. 1, S. 1–14
This image shows Carsten Lechte

Carsten Lechte

Dr. rer. nat.

Leader, Microwave Technology

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