Time Dependent Spectrum Analysis Of High Power Gyrotrons
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Time Dependent Spectrum Analysis Of High Power Gyrotrons
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Author : Schlaich, Andreas
language : en
Publisher: KIT Scientific Publishing
Release Date : 2015-08-06
Time Dependent Spectrum Analysis Of High Power Gyrotrons written by Schlaich, Andreas and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-08-06 with Technology (General) categories.
In this work, a novel measurement system for the analysis of the gyrotron RF output spectrum was developed. It enables unprecedented time dependent measurements within a large bandwidth, dynamic range and unambiguous RF indication in the entire D-Band (110-170 GHz). Special attention was given to the investigation of parasitic RF oscillations, and the analysis of the interplay of thermal cavity expansion and ionization-based space charge neutralization at the start of long RF pulses.
Temperature And Time Dependent Dielectric Measurements And Modelling On Curing Of Polymer Composites
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Author : Prastiyanto, Dhidik
language : en
Publisher: KIT Scientific Publishing
Release Date : 2016-03-15
Temperature And Time Dependent Dielectric Measurements And Modelling On Curing Of Polymer Composites written by Prastiyanto, Dhidik and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-03-15 with Dielectric measurements categories.
In this book a test set for dielectric measurements at 2.45 GHz during curing of polymer composites is developed. Fast reconstruction is solved using a neural network algorithm. Modeling of the curing process at 2.45 GHz using both dielectric constant and dielectric loss factor results in more accurate model compared to low frequency modelling that only uses the loss factor. Effect of various hardeners and different amount of filler is investigated.
Systematic Study Of Key Components For A Coaxial Cavity Gyrotron For Demo
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Author : Franck, Joachim
language : en
Publisher: KIT Scientific Publishing
Release Date : 2017-05-11
Systematic Study Of Key Components For A Coaxial Cavity Gyrotron For Demo written by Franck, Joachim and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-05-11 with Technology (General) categories.
The physical design of cavity and magnetron injection gun (MIG) for a realistic, DEMO-compatible, coaxial-cavity 238 GHz 2 MW CW fusion gyrotron is developed in this work, having auxiliary frequencies at 170 GHz and 204 GHz. Novel systematic approaches towards multi-frequency mode selection, magnet requirements, and MIG design are presented. Mode deterioration and voltage depression variation due to insert misalignment versus cavity wall and/or versus electron beam are studied.
A High Voltage Pulsed Power Modulator For Fast Rising Arbitrary Waveforms
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Author : Hochberg, Martin
language : en
Publisher: KIT Scientific Publishing
Release Date : 2020-02-19
A High Voltage Pulsed Power Modulator For Fast Rising Arbitrary Waveforms written by Hochberg, Martin and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-02-19 with Technology & Engineering categories.
A First 2 Mw Class 136 170 204 Ghz Multi Frequency Gyrotron Pre Prototype For Demo Design Construction And Key Components Verification
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Author : Ruess, Tobias
language : en
Publisher: KIT Scientific Publishing
Release Date : 2023-10-26
A First 2 Mw Class 136 170 204 Ghz Multi Frequency Gyrotron Pre Prototype For Demo Design Construction And Key Components Verification written by Ruess, Tobias and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-10-26 with categories.
Ein Gyrotron wird in magnetisch eingeschlossenen Plasmaexperimenten für Heizung, Stromtrieb, Plasmastabilisierung und Plasmadiagnostik verwendet. In dieser Arbeit wird der erste Entwurf und Bau eines Mehrfrequenz-/Mehrzweck Pre-Prototyp Gyrotrons in koaxialer Technologie vorgestellt, das bei (136)/170/204 GHz mit einer Ausgangsleistung von 2 MW arbeitet. Dies ist der erste Schritt zum Betrieb bei Frequenzen bis zu 240 GHz unter Verwendung der Koaxialhohlraum-Gyrotrontechnologie. - A gyrotron is used in magnetically confined plasma experiments for heating, current drive, plasma stabilization and plasma diagnostics. This work presents the first design and construction of a multi-frequency / multi-purpose coaxial-cavity pre-prototype gyrotron operating at (136)/170/204 GHz with an output power of 2 MW. It is the first step towards operating frequencies up to 240 GHz using the coaxial-cavity gyrotron technology.
Energy Efficient Scalable And Modular Industrial Microwave Applicator For High Temperature Alkaline Hydrolysis Of Pet
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Author : Ramopoulos, Vasileios
language : en
Publisher: KIT Scientific Publishing
Release Date : 2023-01-27
Energy Efficient Scalable And Modular Industrial Microwave Applicator For High Temperature Alkaline Hydrolysis Of Pet written by Ramopoulos, Vasileios and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-01-27 with Technology & Engineering categories.
Microwave-assisted alkaline hydrolysis of PET can be 20 times faster and at lower temperatures. This work presents a novel industrial microwave applicator at 2.45 GHz with homogeneous distribution to support this reaction, which allows an efficient and continuous operation. In addition, an innovative dielectric and calorimetric measurements setup is presented. Furthermore, the modelling of the reaction kinetics based on the measured dielectric parameters is presented.
Automated Mode Recovery And Electronic Stability Control For Wendelstein 7 X Gyrotrons
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Author : Wilde, Fabian
language : en
Publisher: KIT Scientific Publishing
Release Date : 2024-08-07
Automated Mode Recovery And Electronic Stability Control For Wendelstein 7 X Gyrotrons written by Wilde, Fabian and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-08-07 with categories.
Magnetic confinement fusion relies on plasma heating and plasma control using gyrotron oscillators providing at megawatt power levels. The operational reliability decreases when operating at the performance limits due to increasing parasitic mode activity. This work demonstrates for the first time the automated, fast recovery of nominal gyrotron operation during a pulse by exploiting the hysteretic gyrotron behaviour after a mode switch being in use at the Wendelstein 7-X ECRH facility.
Influence Of Emitter Surface Roughness And Emission Inhomogeneity On Efficiency And Stability Of High Power Fusion Gyrotrons
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Author : Zhang, Jianghua
language : en
Publisher: KIT Scientific Publishing
Release Date : 2016-11-30
Influence Of Emitter Surface Roughness And Emission Inhomogeneity On Efficiency And Stability Of High Power Fusion Gyrotrons written by Zhang, Jianghua and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-11-30 with Technology (General) categories.
The increasing demand for powerful, reliable, and efficient gyrotron oscillators for Electron Cyclotron Resonance Heating (ECRH) in fusion plasma experiments requires a close look at the various factors in gyrotrons that determine gyrotron performance. In this frame, the influence of emitter surface roughness, emission inhomogeneity, and secondary electron generation on gyrotron operation is presented, with focus on Low Frequency Oscillations (LFOs) and Electron Beam Halo (EBH) generation.
Feasibility And Operational Limits For A 236 Ghz Hollow Cavity Gyrotron For Demo
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Author : Kalaria, Parth Chandulal
language : en
Publisher: KIT Scientific Publishing
Release Date : 2017-11-08
Feasibility And Operational Limits For A 236 Ghz Hollow Cavity Gyrotron For Demo written by Kalaria, Parth Chandulal and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-11-08 with Technology (General) categories.
The DEMOnstration fusion power plant (DEMO) will be the first fusion reactor, which is intended to generate net electrical power. For successful operation of DEMO, high-power gyrotrons with operating frequencies up to 240 GHz are required for plasma heating and stabilization. In this work, a systematic feasibility study and tolerance analysis are performed for the conventional-type hollow-cavity DEMO gyrotrons. The various approaches are also suggested to identify its operational limits.
Conceptual Studies Of Multistage Depressed Collectors For Gyrotrons
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Author : Wu, Chuanren
language : en
Publisher: KIT Scientific Publishing
Release Date : 2019-09-09
Conceptual Studies Of Multistage Depressed Collectors For Gyrotrons written by Wu, Chuanren and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-09-09 with Technology & Engineering categories.