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1,098 results on '"Thumm, Manfred"'

1. State-of-the-Art of High-Power Gyro-Devices

Author

Thumm, Manfred

Subjects
Dielectric Vacuum Windows, Gyro-Amplifier, Gyro-BWO, Gyrotron-Oscillator, Dielektrische Vakuumfenster, CARM, Gyro-Verstärker, Gyro-RWO, Gyrotron-Oszillator, thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
Abstract

This report presents an update of the experimental achievements published in the review “State- of-the-Art of High-Power Gyro-Devices and Free Electron Masers”, Journal of Infrared, Millimeter, and Terahertz Waves, 41, No. 1, pp 1-140 (2020) and in the KIT Scientific Report 7761 (2021), related to the development of gyro-devices (Tables 2-34). Emphasis is on high-power gyrotron oscillators for long-pulse or continuous wave (CW) operation and pulsed gyrotrons for any applications.

Published
2024
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2. Millimeter-wave WISP search with coherent Light-Shining-Through-a-Wall towards the STAX project

Author

Miyazaki, Akira, Lofnes, Tor, Caspers, Fritz, Spagnolo, Paolo, Jelonnek, John, Ruess, Tobias, Steinmann, Johannes L., and Thumm, Manfred

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

A dark photon is one of the simplest extensions of the Standard Model of particle physics and can be a dark matter candidate. Dark photons kinetically mix with ordinary photons. The mass range from $10^{-4}$ to $10^{-3}$ eV of such dark photons is under-constrained by laboratory-based experiments and a new search is therefore motivated. In this mass range, dark photons behave like waves rather than particles and the corresponding electromagnetic waves are in the millimeter-wave range. The technical difficulties of the millimeter waves have prevented so far dark photon experiments in this mass range. We propose the use of coherent millimeter waves to search for dark photons in a Light-Shining-through-a-Wall (LSW) experiment. We clarify the merit and limitations of coherent wave detection and briefly investigate the potential of single photon sensors at microwaves. Development of millimeter-wave technology is not only limited to dark photons. Technically, an experiment for dark photons by using electromagnetic waves resembles that for axions, another light dark matter candidate, with static magnetic fields. This paper represents an essential step towards axion LSW in the millimeter-wave range (STAX experiment) as a potential successor of an on-going experiment in infrared., Comment: Accepted by Annalen der Physik (PATRAS2022: special issue Dark matter waves, particles, nuggets and other paradigms)

Published
2022

3. State-of-the-Art of High-Power Gyro-Devices. Update of Experimental Results 2021

Author

Thumm, Manfred

Subjects
Gyrotron-Oszillator, Gyro-RWO, Gyro-Verstärker, CARM, Dielektrische Vakuumfenster, Gyrotron-Oscillator, Gyro-BWO, Gyro-Amplifier, Dielectric Vacuum Windows, bic Book Industry Communication::T Technology, engineering, agriculture::TH Energy technology & engineering::THR Electrical engineering
Abstract

This report presents an update of the experimental achievements published in the review “State- of-the-Art of High-Power Gyro-Devices and Free Electron Masers”, Journal of Infrared, Millime-ter, and Terahertz Waves, 41, No. 1, pp 1-140 (2020) related to the development of gyro-devices (Tables 2-34). Emphasis is on high-power gyrotron oscillators for long-pulse or continuous wave (CW) operation and pulsed gyrotrons for any applications.

Published
2021
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4. Excitation of Surface Flute Waves by Electron Beams Gyrating Along Large Larmor Orbits in Coaxial Waveguides

Author

Girka, Igor, Thumm, Manfred, Drake, Gordon W. F., Editor-in-Chief, Babb, James, Series Editor, Bandrauk, Andre D., Series Editor, Bartschat, Klaus, Series Editor, Joachain, Charles J., Series Editor, Keidar, Michael, Series Editor, Lambropoulos, Peter, Series Editor, Leuchs, Gerd, Series Editor, Velikovich, Alexander, Series Editor, Girka, Igor, and Thumm, Manfred

Published
2022
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5. Surface Flute Waves in Waveguides with Non-circular Cross-Section

Author

Girka, Igor, Thumm, Manfred, Drake, Gordon W. F., Editor-in-Chief, Babb, James, Series Editor, Bandrauk, Andre D., Series Editor, Bartschat, Klaus, Series Editor, Joachain, Charles J., Series Editor, Keidar, Michael, Series Editor, Lambropoulos, Peter, Series Editor, Leuchs, Gerd, Series Editor, Velikovich, Alexander, Series Editor, Girka, Igor, and Thumm, Manfred

Published
2022
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6. Excitation of Surface Flute Waves in Electron Cyclotron Frequency Range by Relativistic Electron Beam Gyrating Along Large Larmor Orbits

Author

Girka, Igor, Thumm, Manfred, Drake, Gordon W. F., Editor-in-Chief, Babb, James, Series Editor, Bandrauk, Andre D., Series Editor, Bartschat, Klaus, Series Editor, Joachain, Charles J., Series Editor, Keidar, Michael, Series Editor, Lambropoulos, Peter, Series Editor, Leuchs, Gerd, Series Editor, Velikovich, Alexander, Series Editor, Girka, Igor, and Thumm, Manfred

Published
2022
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7. Nonlinear Theory of Surface Flute Wave Excitation in Electron Cyclotron Frequency Range

Author

Girka, Igor, Thumm, Manfred, Drake, Gordon W. F., Editor-in-Chief, Babb, James, Series Editor, Bandrauk, Andre D., Series Editor, Bartschat, Klaus, Series Editor, Joachain, Charles J., Series Editor, Keidar, Michael, Series Editor, Lambropoulos, Peter, Series Editor, Leuchs, Gerd, Series Editor, Velikovich, Alexander, Series Editor, Girka, Igor, and Thumm, Manfred

Published
2022
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8. Surface Flute Waves in Inhomogeneous Magnetized Plasma Waveguides

Author

Girka, Igor, Thumm, Manfred, Drake, Gordon W. F., Editor-in-Chief, Babb, James, Series Editor, Bandrauk, Andre D., Series Editor, Bartschat, Klaus, Series Editor, Joachain, Charles J., Series Editor, Keidar, Michael, Series Editor, Lambropoulos, Peter, Series Editor, Leuchs, Gerd, Series Editor, Velikovich, Alexander, Series Editor, Girka, Igor, and Thumm, Manfred

Published
2022
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9. Coupled Surface Flute Waves in Current-Carrying Plasma Waveguides

Author

Girka, Igor, Thumm, Manfred, Drake, Gordon W. F., Editor-in-Chief, Babb, James, Series Editor, Bandrauk, Andre D., Series Editor, Bartschat, Klaus, Series Editor, Joachain, Charles J., Series Editor, Keidar, Michael, Series Editor, Lambropoulos, Peter, Series Editor, Leuchs, Gerd, Series Editor, Velikovich, Alexander, Series Editor, Girka, Igor, and Thumm, Manfred

Published
2022
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10. Electromagnetic Energy Rotation Caused by Surface Flute Waves

Author

Girka, Igor, Thumm, Manfred, Drake, Gordon W. F., Editor-in-Chief, Babb, James, Series Editor, Bandrauk, Andre D., Series Editor, Bartschat, Klaus, Series Editor, Joachain, Charles J., Series Editor, Keidar, Michael, Series Editor, Lambropoulos, Peter, Series Editor, Leuchs, Gerd, Series Editor, Velikovich, Alexander, Series Editor, Girka, Igor, and Thumm, Manfred

Published
2022
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11. Excitation of Surface Flute Waves with Frequencies Other Than Electron Cyclotron Frequency by Flow of Charged Particles Gyrating Along Large Larmor Orbits in Axial External Static Magnetic Field

Author

Girka, Igor, Thumm, Manfred, Drake, Gordon W. F., Editor-in-Chief, Babb, James, Series Editor, Bandrauk, Andre D., Series Editor, Bartschat, Klaus, Series Editor, Joachain, Charles J., Series Editor, Keidar, Michael, Series Editor, Lambropoulos, Peter, Series Editor, Leuchs, Gerd, Series Editor, Velikovich, Alexander, Series Editor, Girka, Igor, and Thumm, Manfred

Published
2022
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12. Surface Flute Waves in Uniform Magneto-active Plasma Filled Waveguides

Author

Girka, Igor, Thumm, Manfred, Drake, Gordon W. F., Editor-in-Chief, Babb, James, Series Editor, Bandrauk, Andre D., Series Editor, Bartschat, Klaus, Series Editor, Joachain, Charles J., Series Editor, Keidar, Michael, Series Editor, Lambropoulos, Peter, Series Editor, Leuchs, Gerd, Series Editor, Velikovich, Alexander, Series Editor, Girka, Igor, and Thumm, Manfred

Published
2022
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13. Introduction

Author

Girka, Igor, Thumm, Manfred, Drake, Gordon W. F., Editor-in-Chief, Babb, James, Series Editor, Bandrauk, Andre D., Series Editor, Bartschat, Klaus, Series Editor, Joachain, Charles J., Series Editor, Keidar, Michael, Series Editor, Lambropoulos, Peter, Series Editor, Leuchs, Gerd, Series Editor, Velikovich, Alexander, Series Editor, Girka, Igor, and Thumm, Manfred

Published
2022
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14. Applications of Surface Wave Propagation

Author

Girka, Igor, Thumm, Manfred, Drake, Gordon W. F., Editor-in-Chief, Babb, James, Series Editor, Bandrauk, Andre D., Series Editor, Bartschat, Klaus, Series Editor, Joachain, Charles J., Series Editor, Keidar, Michael, Series Editor, Lambropoulos, Peter, Series Editor, Leuchs, Gerd, Series Editor, Velikovich, Alexander, Series Editor, Girka, Igor, and Thumm, Manfred

Published
2022
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17. A new 3MW ECRH system at 105 GHz for WEST

Author

Delpech, Lena, Alberti, Stefano, Avramidis, Konstantinos, Ayreault, Aline, Batal, Tristan, Bernard, Jean-Michel, Bouquey, Francis, Chelis, Ioannis, Clairet, Frederic, Corbel, Elodie, Doceul, Louis, Durand, Frederic, Dumont, Remi, Fonghetti, Theo, Gantenbein, Gerd, Garibaldi, Pascal, Giruzzi, Gerardo, Goodman, Tim, Hogge, Jean-Philippe, Illy, Stefan, Jelonnek, John, Jin, Jianbo, Laqua, Heinrich, Legrand, Francois, Lievin, Christophe, Magaud, Philippe, Maget, Patrick, Manas, Pierre, Marsen, Stefan, Regal-Mezin, Xavier, Mollard, Patrick, Mouyon, David, Nicolas, Laurent, Ouerfelli, Adam, Pagonakis, Ioannis, Robinet, Benjamin, Ruess, Tobias, Santraine, Benjamin, Thumm, Manfred, and Ioannidis, Zisis

Published
2023
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18. Surface Electron Cyclotron O-Mode Waves

Author

Girka, Volodymyr, Girka, Igor, Thumm, Manfred, Drake, Gordon W. F., Editor-in-Chief, Babb, James, Series Editor, Bandrauk, Andre D., Series Editor, Bartschat, Klaus, Series Editor, Compton, Robert N., Series Editor, Gallagher, Tom, Series Editor, Joachain, Charles J., Series Editor, Keidar, Michael, Series Editor, Lambropoulos, Peter, Series Editor, Leuchs, Gerd, Series Editor, Meystre, Pierre, Series Editor, Girka, Volodymyr, Girka, Igor, and Thumm, Manfred

Published
2019
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19. Surface Electron Cyclotron X-Mode Waves

Author

Girka, Volodymyr, Girka, Igor, Thumm, Manfred, Drake, Gordon W. F., Editor-in-Chief, Babb, James, Series Editor, Bandrauk, Andre D., Series Editor, Bartschat, Klaus, Series Editor, Compton, Robert N., Series Editor, Gallagher, Tom, Series Editor, Joachain, Charles J., Series Editor, Keidar, Michael, Series Editor, Lambropoulos, Peter, Series Editor, Leuchs, Gerd, Series Editor, Meystre, Pierre, Series Editor, Girka, Volodymyr, Girka, Igor, and Thumm, Manfred

Published
2019
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20. Methods of Solving the Kinetic Vlasov-Boltzmann Equation in Case of Bounded Magnetized Plasmas

Author

Girka, Volodymyr, Girka, Igor, Thumm, Manfred, Drake, Gordon W. F., Editor-in-Chief, Babb, James, Series Editor, Bandrauk, Andre D., Series Editor, Bartschat, Klaus, Series Editor, Compton, Robert N., Series Editor, Gallagher, Tom, Series Editor, Joachain, Charles J., Series Editor, Keidar, Michael, Series Editor, Lambropoulos, Peter, Series Editor, Leuchs, Gerd, Series Editor, Meystre, Pierre, Series Editor, Girka, Volodymyr, Girka, Igor, and Thumm, Manfred

Published
2019
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21. Surface Electron Cyclotron TM-Mode Waves

Author

Girka, Volodymyr, Girka, Igor, Thumm, Manfred, Drake, Gordon W. F., Editor-in-Chief, Babb, James, Series Editor, Bandrauk, Andre D., Series Editor, Bartschat, Klaus, Series Editor, Compton, Robert N., Series Editor, Gallagher, Tom, Series Editor, Joachain, Charles J., Series Editor, Keidar, Michael, Series Editor, Lambropoulos, Peter, Series Editor, Leuchs, Gerd, Series Editor, Meystre, Pierre, Series Editor, Girka, Volodymyr, Girka, Igor, and Thumm, Manfred

Published
2019
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22. Introduction

Author

Girka, Volodymyr, Girka, Igor, Thumm, Manfred, Drake, Gordon W. F., Editor-in-Chief, Babb, James, Series Editor, Bandrauk, Andre D., Series Editor, Bartschat, Klaus, Series Editor, Compton, Robert N., Series Editor, Gallagher, Tom, Series Editor, Joachain, Charles J., Series Editor, Keidar, Michael, Series Editor, Lambropoulos, Peter, Series Editor, Leuchs, Gerd, Series Editor, Meystre, Pierre, Series Editor, Girka, Volodymyr, Girka, Igor, and Thumm, Manfred

Published
2019
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23. Basic design considerations for a frequency step-tunable electron cyclotron wave system to suppress NTMs in DEMO

Author

Wu, Chuanren, Aiello, Gaetano, Avramidis, Konstantinos A., Bruschi, Alessandro, Fable, Emiliano, Franke, Thomas, Gantenbein, Gerd, Garavaglia, Saul, Granucci, Gustavo, Illy, Stefan, Janky, Filip, Jelonnek, John, Kudláček, Ondřej, Moro, Alessandro, Poli, Emanuele, Ruess, Tobias, Scherer, Theo, Schramm, Raphael, Siccinio, Mattia, Snicker, Antti, Strauß, Dirk, Suárez López, Guillermo, Tardini, Giovanni, Thumm, Manfred, Tran, Minh Quang, and Zohm, Hartmut

Published
2021
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36. Towards a 1.5 MW, 140 GHz gyrotron for the upgraded ECRH system at W7-X

Author

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, and Wolf, Robert C.

Published
2021
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38. Millimeter-Wave WISP Search with Coherent Light-Shining-Through-a-Wall Toward the STAX Project

Author

Miyazaki, Akira, Lofnes, Tor, Caspers, Fritz, Spagnolo, Paolo, Jelonnek, John, Ruess, Tobias, Steinmann, Johannes L., Thumm, Manfred, Miyazaki, Akira, Lofnes, Tor, Caspers, Fritz, Spagnolo, Paolo, Jelonnek, John, Ruess, Tobias, Steinmann, Johannes L., and Thumm, Manfred

Abstract

A dark photon is one of the simplest extensions of the Standard Model of particle physics and can be a dark matter candidate. Dark photons kinetically mix with ordinary photons. The mass range from 10(-4) to 10(-3) eV of such dark photons is underconstrained by laboratory-based experiments and a new search is therefore motivated. In this mass range, dark photons behave like waves rather than particles and the corresponding electromagnetic waves are in the millimeter-wave range. The technical difficulties of the millimeter waves have prevented so far dark photon experiments in this mass range. The use of coherent millimeter waves to search for dark photons in a Light-Shining-through-a-Wall (LSW) experiment is proposed. The merits and limitations of coherent wave detection are clarified and the potential of single photon sensors at microwaves is investigated. Development of millimeter-wave technology is not only limited to dark photons. Technically, an experiment for dark photons by using electromagnetic waves resembles that for axions, another light dark matter candidate, with static magnetic fields. This paper represents an essential step toward axion LSW in the millimeter-wave range (Sub-THz-AXion experiment; STAX) as a potential successor of an on-going experiment in infrared.

Published
2024
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45. EU DEMO EC system preliminary conceptual design

Author

Garavaglia, Saul, Aiello, Gaetano, Alberti, Stefano, Avramidis, Konstantinos, Bruschi, Alessandro, Chelis, Ioannis G., Franck, Joachim, Gantenbein, Gerd, Granucci, Gustavo, Grossetti, Giovanni, Hizanidis, Kyriakos, Illy, Stefan, Jelonnek, John, Kalaria, Parth, Latsas, George, Moro, Alessandro, Pagonakis, Ioannis, Peponis, Dimitrios V., Poli, Emanuele, Rispoli, Natale, Ruess, Sebastian, Rzesnicki, Tomasz, Scherer, Theo, Strauss, Dirk, Thumm, Manfred, Tigelis, Ioannis, Tsironis, Christos, Wu, Chuanren, Franke, Thomas, and Tran, Minh Quang

Published
2018
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46. Progress in the Design of Megawatt-Class Fusion Gyrotrons Operating at the Second Harmonic of the Cyclotron Frequency

Author

Illy, Stefan, primary, Avramidis, Konstantinos A., additional, Chelis, Ioannis, additional, Ell, Benjamin, additional, Feuerstein, Lukas, additional, Gantenbein, Gerd, additional, Ioannidis, Zisis, additional, Jelonnek, John, additional, Jin, Jianbo, additional, Latsas, George, additional, Marek, Alexander, additional, Peponis, Dimitrios, additional, Rzesnicki, Tomasz, additional, Thumm, Manfred, additional, Tigelis, Ioannis, additional, and Wu, Chuanren, additional

Published
2023
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49. State-of-the-Art of High-Power Gyro-Devices. Update of Experimental Results 2021.

Author

Thumm, Manfred

Subjects
Electrical engineering, CARM, Dielectric Vacuum Windows, Dielektrische Vakuumfenster, Gyro-Amplifier, Gyro-BWO, Gyro-RWO, Gyro-Verstärker, Gyrotron-Oscillator, Gyrotron-Oszillator
Abstract

Summary: This report presents an update of the experimental achievements published in the review "State- of-the-Art of High-Power Gyro-Devices and Free Electron Masers", Journal of Infrared, Millime-ter, and Terahertz Waves, 41, No. 1, pp 1-140 (2020) related to the development of gyro-devices (Tables 2-34). Emphasis is on high-power gyrotron oscillators for long-pulse or continuous wave (CW) operation and pulsed gyrotrons for any applications.

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