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Conceptual Studies Of Multistage Depressed Collectors For Gyrotrons
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Book Synopsis Conceptual Studies of Multistage Depressed Collectors for Gyrotrons by : Wu, Chuanren
Download or read book Conceptual Studies of Multistage Depressed Collectors for Gyrotrons written by Wu, Chuanren and published by KIT Scientific Publishing. This book was released on 2019-09-09 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A First 2 MW-Class (136)/170/204 GHz Multi-Frequency Gyrotron Pre-Prototype for DEMO: Design, Construction and Key Components Verification by : Ruess, Tobias
Download or read book 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 published by KIT Scientific Publishing. This book was released on 2023-10-26 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Automated Mode Recovery and Electronic Stability Control for Wendelstein 7-X Gyrotrons by : Wilde, Fabian
Download or read book Automated Mode Recovery and Electronic Stability Control for Wendelstein 7-X Gyrotrons written by Wilde, Fabian and published by KIT Scientific Publishing. This book was released on 2024-08-07 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Pushing the KIT 2 MW Coaxial-Cavity Short-Pulse Gyrotron Towards a DEMO Relevant Design by : Ruess, Sebastian
Download or read book Pushing the KIT 2 MW Coaxial-Cavity Short-Pulse Gyrotron Towards a DEMO Relevant Design written by Ruess, Sebastian and published by KIT Scientific Publishing. This book was released on 2021-01-22 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic fusion is one approach to generate thermonuclear fusion power in an environmental friendly way. The Electron Cyclotron Resonance Heating is considered as the major concept for startup, heating and control of the fusion plasma. Megawatt-class gyrotrons generate the required microwave power. This work focuses on advanced key components and technologies for a DEMO relevant 2 MW gyrotron. One major focus is on the development of advanced Magnetron Injection Guns. Another focus is on the red
Book Synopsis MultPhysics Modelling towards the Stabilization of PAN Fibers with Microwaves Based on Experimental Data by : Hofele, Julia
Download or read book MultPhysics Modelling towards the Stabilization of PAN Fibers with Microwaves Based on Experimental Data written by Hofele, Julia and published by KIT Scientific Publishing. This book was released on 2024-07-10 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: High energy demand is one reason for high costs of carbon fibers. One option to decrease them is to use microwave heating instead of conventional heating. In this work, steps towards a microwave assisted process during the stabilization phase are presented. In-situ dielectric measurements are performed and a reaction kinetics model is setup in connection to the dielectric loss. This allows to calculate a stabilization degree and fiber temperatures leading to a basic process understanding.
Book Synopsis Multi-stage Depressed Collector for Small Orbit Gyrotrons by :
Download or read book Multi-stage Depressed Collector for Small Orbit Gyrotrons written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A multi-stage depressed collector for receiving energy from a small orbit gyrating electron beam employs a plurality of electrodes at different potentials for sorting the individual electrons on the basis of their total energy level. Magnetic field generating coils, for producing magnetic fields and magnetic iron for magnetic field shaping produce adiabatic and controlled non-adiabatic transitions of the incident electron beam to further facilitate the sorting.
Book Synopsis Energy-efficient, scalable and modular industrial microwave applicator for high temperature alkaline hydrolysis of PET by : Ramopoulos, Vasileios
Download or read book Energy-efficient, scalable and modular industrial microwave applicator for high temperature alkaline hydrolysis of PET written by Ramopoulos, Vasileios and published by KIT Scientific Publishing. This book was released on 2023-01-27 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis New Type of sub-THz Oscillator and Amplifier Systems Based on Helical-Type Gyro-TWTs by : Marek, Alexander
Download or read book New Type of sub-THz Oscillator and Amplifier Systems Based on Helical-Type Gyro-TWTs written by Marek, Alexander and published by KIT Scientific Publishing. This book was released on 2023-01-26 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work presents the development of a new sub-THz source for the generation of trains of coherent high-power ultra-short pulses at 263 GHz via passive mode-locking of two coupled helical gyro-TWTs. For the first time, it is shown that the operation of such passive mode-locked helical gyro-TWTs in the hard excitation regime is of particular importance to reach the optimal coherency of the generated pulses. This could be of particular interest for some new time-domain DNP-NMR methods.
Book Synopsis A high-voltage pulsed power modulator for fast-rising arbitrary waveforms by : Hochberg, Martin
Download or read book A high-voltage pulsed power modulator for fast-rising arbitrary waveforms written by Hochberg, Martin and published by KIT Scientific Publishing. This book was released on 2020-02-19 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Annual Report 2017 / Institute for Pulsed Power and Microwave Technology / Institut fuer Hochleistungsimpuls- und Mikrowellentechnik by : Jelonnek, John
Download or read book Annual Report 2017 / Institute for Pulsed Power and Microwave Technology / Institut fuer Hochleistungsimpuls- und Mikrowellentechnik written by Jelonnek, John and published by KIT Scientific Publishing. This book was released on 2019-02-22 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Annual Report 2015 / Institute for Pulsed Power and Microwave Technology = Jahresbericht 2015 / Institut fuer Hochleistungsimpuls- und Mikrowellentechnik. (KIT Scientific Reports ; 7722) by : Jelonnek, John
Download or read book Annual Report 2015 / Institute for Pulsed Power and Microwave Technology = Jahresbericht 2015 / Institut fuer Hochleistungsimpuls- und Mikrowellentechnik. (KIT Scientific Reports ; 7722) written by Jelonnek, John and published by KIT Scientific Publishing. This book was released on 2017-01-24 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Feasibility and Operational Limits for a 236 GHz Hollow-Cavity Gyrotron for DEMO by : Kalaria, Parth Chandulal
Download or read book Feasibility and Operational Limits for a 236 GHz Hollow-Cavity Gyrotron for DEMO written by Kalaria, Parth Chandulal and published by KIT Scientific Publishing. This book was released on 2017-11-08 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Depressed Collector Experiments on a Quasioptical Gyrotron by :
Download or read book Depressed Collector Experiments on a Quasioptical Gyrotron written by and published by . This book was released on 1991 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: A simple, single, single-stage collector has been tested on the quasioptical gyrotron (QOG) experiment at the Naval Research Laboratory (NRL). This is the first application of a depressed collector to a high power gyrotron, and was relatively easily accomplished due to the natural separation of the electron beam and the output radiation in the QOC. Collector efficiencies as high as 50% and overall efficiencies up to 16% were observed. The output power reached 431 kW with an overall efficiency of 13% and a collector efficiency of 41%. The collector efficiency was limited in this experiment due to interception of approximately 15% of the electron beam on an undepressed section of the beam guide, a problem readily correctable with a small change in the beam guide dimensions. If this part of the electron beam was collected at the collector potential, the overall and collector efficiency would increase to 16% and 55% respectively. The maximum collector efficiency would increase to 58% (at high output power) and the best overall efficiency would increase to 20% (at lower output power).
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781723434242 Total Pages :26 pages Book Rating :4.4/5 (342 download)
Book Synopsis Experimental Verification of the Multistage Depressed Collector Design Procedure for a High-Perveance, Helix-Type, Traveling-Wave Tube. [in Communications Satellites] by : National Aeronautics and Space Administration (NASA)
Download or read book Experimental Verification of the Multistage Depressed Collector Design Procedure for a High-Perveance, Helix-Type, Traveling-Wave Tube. [in Communications Satellites] written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-21 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The validity of a computational procedure for the design of multistage depressed collectors (MDC's) is demonstrated for a traveling wave tube (TWT) with a perveance of .00000123. The MDC is used with spent-beam refocusing to improve substantially the efficiency of the TWT. Reports on this subject have verified, under a variety of operating conditions, the MDC design procedure for TWT's with lower perveance. The design procedure is based on two computer programs that create a mathematical model of the electric and magnetic fields of the TWT refocuser MDC system and its electron beam. The two principal outputs of the analysis are a description of the radiofrequency (RF) performance of the TWT and the trajectories of representatives groups of charges from the input of the TWT to their points of interception on the MDC electrodes. Dayton, J. A., Jr. and Kosmahl, H. G. and Ramins, P. Glenn Research Center NASA-TP-2162, E-1362, NAS 1.60:2162 RTOP 506-61-42
Book Synopsis Experimental Verification of the Multistage Depressed Collector Design Procedure for a High-perveance, Helix-type, Traveling-wave Tube by :
Download or read book Experimental Verification of the Multistage Depressed Collector Design Procedure for a High-perveance, Helix-type, Traveling-wave Tube written by and published by . This book was released on 1983 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Calculation of Secondary Electron Trajectories in Multistage Depressed Collectors for Microwave Amplifiers by : Dale A. Force
Download or read book Calculation of Secondary Electron Trajectories in Multistage Depressed Collectors for Microwave Amplifiers written by Dale A. Force and published by . This book was released on 1986 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Secondary-electron-emission Losses in Multistage Depressed Collectors and Traveling-wave-tube Efficiency Improvements with Carbon Collector Electrode Surfaces by : Peter Ramins
Download or read book Secondary-electron-emission Losses in Multistage Depressed Collectors and Traveling-wave-tube Efficiency Improvements with Carbon Collector Electrode Surfaces written by Peter Ramins and published by . This book was released on 1986 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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