Search Results - "Wagner, Dietmar"

Conceptual design of a modular EC heating system for EU-DEMO by Bruschi, Alessandro, Hogge, Jean-Philippe, Jelonnek, John, Strauss, Dirk, Wu, Chuanren, Aiello, Gaetano, Avramidis, Kostas, Baiocchi, Benedetta, Birlan, Daniel, Chavan, René, Chelis, Ioannis, Clement, Arnaud, Collaku, Aldo, Crisinel, Fabien, Difonzo, Rosa, Ell, Benjamin, Fanale, Francesco, Fanelli, Pierluigi, Figini, Lorenzo, Gajetti, Eleonora, Gantenbein, Gerd, Garavaglia, Saul, Goodman, Timothy P., Illy, Stefan, Ioannidis, Zisis, Jin, Jambo, Latsas, George, Marraco Borderas, Cinta L., Marsen, Stefan, Moro, Alessandro, Noël, Marc, Peponis, Dimitrios, Pinna, Tonio, Platania, Paola, Rispoli, Natale, Ruess, Tobias, Rzesnicki, Tomasz, Salvitti, Alessandra, Savoldi, Laura, Scherer, Theo, Schreck, Sabine, Simonetto, Alessandro, Spaeh, Peter, Stanculovic, Sebastian, Stange, Torsten, Thumm, Manfred, Tigelis, Ioannis, Tsironis, Christos, Wagner, Dietmar, Xydou, Anastasia

“…The European DEMO (EU-DEMO) reactor studies within EUROfusion aim to develop a fusion power plant concept. The large tokamak device needs an auxiliary heating…”
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ECE Diagnostic for the initial Operation of Wendelstein 7-X by Hirsch, Matthias, Höfel, Udo, Oosterbeek, Johan Willem, Chaudhary, Neha, Geiger, Joachim, Hartfuss, Hans-Jürgen, Kasparek, Walter, Marushchenko, Nikolai, van Milligen, Boudewijn, Plaum, Burkhard, Stange, Torsten, Svensson, Jakob, Tsuchiya, Hayato, Wagner, Dietmar, McWeir, Gavin, Wolf, Robert

“…The ECE diagnostic at W7-X in its standard mode of operation measures in X2 mode polarization with a 32 channel radiometer in the frequency band around 140 GHz…”
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Experiments with reduced single pass absorption at ASDEX Upgrade – instrumentation and applications by Schubert, Martin, Stober, Joerg, Herrmann, Albrecht, Grigore, Eduard, Kasparek, Walter, Lechte, Carsten, Monaco, Francesco, Petzold, Bernhard, Plaum, Burkhard, Poli, Emanuele, Ruset, Cristian, Vorbrugg, Stefan, Wagner, Dietmar

“…Reflecting gratings have been installed in the vacuum vessel of ASDEX Upgrade for all beamlines of the electron cyclotron resonance heating system. Potentially…”
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Simulation of Polarising and Reflector Gratings for High Power mm Waves by Lechte, Carsten, Kasparek, Walter, Plaum, Burkhard, Leuterer, Fritz, Schubert, Martin, Stober, Jörg, Wagner, Dietmar

“…High power mm waves for fusion plasma heating need to be elliptically polarised to ensure good absorption in the plasma. In some scenarios, electron cyclotron…”
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Studies towards an upgraded 1.5 MW gyrotron for W7-X by Avramidis, Konstantinos A., Ruess, Tobias, Mentgen, Felix, Jin, Jianbo, Wagner, Dietmar, Gantenbein, Gerd, Illy, Stefan, Ioannidis, C., Laqua, Heinrich P., Pagonakis, Ioannis Gr, Rzesnicki, Tomasz, Thumm, Manfred, Wolf, Robert C., Jelonnek, John

“…Studies towards a 1.5 MW, 140 GHz CW gyrotron, with the capability of MW-class operation also at 175 GHz, are ongoing at Karlsruhe Institute of Technology in…”
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Beam tracing study for design and operation of two-pass electron cyclotron heating at ASDEX Upgrade by Schubert, Martin, Plaum, Burkhard, Stober, Jörg, Herrmann, Albrecht, Kasparek, Walter, Lechte, Carsten, Leuterer, Fritz, Monaco, Francesco, Petzold, Bernhard, Poli, Emanuele, Vorbrugg, Stefan, Wagner, Dietmar

“…The electron cyclotron resonance heating system at ASDEX Upgrade (AUG) is currently being extended to eight similar Gyrotrons in total. Each Gyrotron operates…”
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Improvement of the Output Mode Purity of a Complex-Cavity Resonator for a Frequency-Tunable Sub-THz Gyrotron by Wagner, Dietmar, Thumm, Manfred

“…One way to improve the mode selection in terahertz gyrotrons is the use of stepped cavity resonators that satisfy the resonance condition for two modes with…”
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Highly Efficient Quasi-Optical Mode Converter for a Multifrequency High-Power Gyrotron by Prinz, O., Arnold, A., Gantenbein, G., Ying-hui Liu, Thumm, M., Wagner, D.

“…A highly efficient quasi-optical mode converter with a bandwidth of 38 GHz has been designed and tested. The mode converter combines low-diffraction losses and…”
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Primary angiosarcoma of the ovary with prominent fibrosis of the ovarian stroma. Case report of an 81-year old patient by Bösmüller, Hans, Gruber, Christine, Haitchi-Petnehazy, Sophie, Wagner, Dietmar, Webersinke, Gerald, Hauptmann, Steffen

“…Primary angiosarcoma of the ovary (AS) is a rare entity with only 31 reported cases. The majority are pure angiosarcomas, the remainder are associated either…”
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Extension of electron cyclotron heating at ASDEX Upgrade with respect to high density operation by Schubert, Martin, Stober, Jörg, Herrmann, Albrecht, Kasparek, Walter, Leuterer, Fritz, Monaco, Francesco, Petzold, Bernhard, Plaum, Burkhard, Vorbrugg, Stefan, Wagner, Dietmar, Zohm, Hartmut

“…The ASDEX Upgrade electron cyclotron resonance heating operates at 105 GHz and 140 GHz with flexible launching geometry and polarization. In 2016 four…”
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Bragg Reflection Band Stop Filter for ECE on Wega by Wagner, Dietmar, Kasparek, Walter, Leuterer, Fritz, Monaco, Francesco, Münich, Max, Schütz, Harald, Stange, Torsten, Stober, Jörg, Thumm, Manfred

“…Notch filters are required to protect sensitive millimeter wave diagnostics in fusion experiments from gyrotron stray radiation in the plasma vessel. A new…”
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Machine safety issues with respect to the extension of ECRH systems at ASDEX Upgrade by Schuberta, Martin, Herrmann, Albrecht, Monaco, Francesco, Rohde, Volker, Schütz, Harald, Stober, Jörg, Vierle, Thomas, Vorbrugg, Stefan, Wagner, Dietmar, Zasche, Dieter, Zehetbauer, Thomas, Zeidner, Wolfgang

“…The beam intensity of electron cyclotron resonance heating at ASDEX Upgrade has the potential to seriously damage in-vessel components, whenever not fully…”
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Present Status of the New Multifrequency ECRH System for ASDEX Upgrade by Wagner, D.H., Grunwald, G., Leuterer, F., Manini, A., Monaco, F., Munich, M.J., Schutz, H., Stober, J., Zohm, H., Franke, T., Thumm, M., Heidinger, R., Gantenbein, G., Meier, A., Kasparek, W., Lechte, C., Litvak, A.G., Denisov, G.G., Chirkov, A.V., Tai, E.M., Popov, L.G., Nichiporenko, V.O., Myasnikov, V.E., Solyanova, E.A., Malygin, S.A., Meo, F., Woskov, P.P.

“…A new multifrequency electron cyclotron resonance heating system is under construction for the Axially Symmetric Divertor Experiment (ASDEX) Upgrade tokamak…”
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Single- and Two-Frequency Sub-THz Waveguide Notch Filters With Rejection Frequencies Within and Beyond the Passband by Wagner, Dietmar, Kasparek, Walter, Leuterer, Fritz, Monaco, Francesco, Plaum, Burkhard, Ruess, Tobias, Schutz, Harald, Stober, Jorg, Thumm, Manfred

“…Notch filters are a key component in millimeter-wave plasma diagnostics systems for magnetically confined fusion plasmas. They are required to protect…”
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In-situ Low Power Tests of the ASDEX Upgrade ECRH Transmission Lines by Wagner, Dietmar, Leuterer, Fritz, Monaco, Francesco, Schütz, Harald, Stober, Jörg, Thumm, Manfred

“…An Electron Cyclotron Resonance Heating (ECRH) system employing 8 gyrotrons is in routine operation at the ASDEX Upgrade tokamak at IPP Garching. The gyrotrons…”
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First Operation of a Step-Frequency Tunable 1-MW Gyrotron With a Diamond Brewster Angle Output Window by Gantenbein, Gerd, Samartsev, Andrey, Aiello, Gaetano, Dammertz, Guenter, Jelonnek, John, Losert, Markus, Schlaich, Andreas, Scherer, Theo Andreas, Strauss, Dirk, Thumm, Manfred, Wagner, Dietmar

“…Experimental results using a step-frequency tunable D-band gyrotron are reported. The short pulse (~3 ms) gyrotron is equipped with an elliptically brazed…”
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High Purity Mode CW Gyrotron Covering the Subterahertz to Terahertz Range Using a 20 T Superconducting Magnet by Idehara, Toshitaka, Ogawa, Isamu, Wagner, Dietmar, Thumm, Manfred, Kosuga, Kosuke, Sabchevski, Svilen Petrov

“…In this paper, we present the current status and both the ongoing investigation and the continuous improvements to the operational performance of a unique…”
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Reflection of TE0n Modes at Open-Ended Oversized Circular Waveguide by THUMM, Manfred, KASPAREK, Walter, WAGNER, Dietmar, WIEN, Andreas

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Towards a 1.5 MW, 140 GHz gyrotron for the upgraded ECRH system at W7-X by Avramidis, Konstantinos A., Ioannidis, Zisis C., Aiello, Gaetano, Bénin, Patrick, Chelis, Ioannis, Dinklage, Andreas, Gantenbein, Gerd, Illy, Stefan, Jelonnek, John, Jin, Jianbo, Laqua, Heinrich P., Leggieri, Alberto, Legrand, François, Marek, Alexander, Marsen, Stefan, Pagonakis, Ioannis Gr, Ruess, Tobias, Rzesnicki, Tomasz, Scherer, Theo, Strauss, Dirk, Thumm, Manfred, Tigelis, Ioannis, Wagner, Dietmar, Weggen, Jörg, Wolf, Robert C.

“…•1.5 MW gyrotron development for the ECRH system upgrade at the stellarator W7-X.•Numerically verified complete design of the 1.5 MW 140 GHz CW…”
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Stepped Sub-THz Gyrotron Cavity with Improved Output Mode Purity by Wagner, Dietmar, Thumm, Manfred

“…Stepped cavity resonators are used in terahertz gyrotrons for better mode selection. They can satisfy the resonance condition for two modes with different…”
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