A High Voltage Pulsed Power Modulator For Fast Rising Arbitrary Waveforms PDF Download
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Author | : Hochberg, Martin |
Publisher | : KIT Scientific Publishing |
Total Pages | : 198 |
Release | : 2020-02-19 |
Genre | : Technology & Engineering |
ISBN | : 373150958X |
Download A high-voltage pulsed power modulator for fast-rising arbitrary waveforms Book in PDF, ePub and Kindle
Author | : Ruess, Sebastian |
Publisher | : KIT Scientific Publishing |
Total Pages | : 190 |
Release | : 2021-01-22 |
Genre | : Technology & Engineering |
ISBN | : 3731510243 |
Download Pushing the KIT 2 MW Coaxial-Cavity Short-Pulse Gyrotron Towards a DEMO Relevant Design Book in PDF, ePub and Kindle
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
Author | : Ramopoulos, Vasileios |
Publisher | : KIT Scientific Publishing |
Total Pages | : 162 |
Release | : 2023-01-27 |
Genre | : Technology & Engineering |
ISBN | : 3731510995 |
Download Energy-efficient, scalable and modular industrial microwave applicator for high temperature alkaline hydrolysis of PET Book in PDF, ePub and Kindle
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.
Author | : Marek, Alexander |
Publisher | : KIT Scientific Publishing |
Total Pages | : 322 |
Release | : 2023-01-26 |
Genre | : Technology & Engineering |
ISBN | : 3731512505 |
Download New Type of sub-THz Oscillator and Amplifier Systems Based on Helical-Type Gyro-TWTs Book in PDF, ePub and Kindle
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.
Author | : Ruess, Tobias |
Publisher | : KIT Scientific Publishing |
Total Pages | : 258 |
Release | : 2023-10-26 |
Genre | : |
ISBN | : 3731513099 |
Download A First 2 MW-Class (136)/170/204 GHz Multi-Frequency Gyrotron Pre-Prototype for DEMO: Design, Construction and Key Components Verification Book in PDF, ePub and Kindle
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.
Author | : Wilde, Fabian |
Publisher | : KIT Scientific Publishing |
Total Pages | : 272 |
Release | : 2024-08-07 |
Genre | : |
ISBN | : 3731511606 |
Download Automated Mode Recovery and Electronic Stability Control for Wendelstein 7-X Gyrotrons Book in PDF, ePub and Kindle
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.
Author | : Hofele, Julia |
Publisher | : KIT Scientific Publishing |
Total Pages | : 174 |
Release | : 2024-07-10 |
Genre | : |
ISBN | : 3731513501 |
Download MultPhysics Modelling towards the Stabilization of PAN Fibers with Microwaves Based on Experimental Data Book in PDF, ePub and Kindle
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.
Author | : |
Publisher | : |
Total Pages | : 4 |
Release | : 2009 |
Genre | : |
ISBN | : |
Download Amplitude Modulator Chassis Book in PDF, ePub and Kindle
The Amplitude Modulator Chassis (AMC) is the final component in the MOR system and connects directly to the PAM input through a 100-meter fiber. The 48 AMCs temporally shape the 48 outputs of the MOR using an arbitrary waveform generator coupled to an amplitude modulator. The amplitude modulation element is a two stage, Lithium Niobate waveguide device, where the intensity of the light passing through the device is a function of the electrical drive applied. The first stage of the modulator is connected to a programmable high performance Arbitrary Waveform Generator (AWG) consisting of 140 impulse generators space 250 ps apart. An arbitrary waveform is generated by independently varying the amplitude of each impulse generator and then summing the impulses together. In addition to the AWG a short pulse generator is also connected to the first stage of the modulator to provide a sub 100-ps pulse used for timing experiments. The second stage of the modulator is connect to a square pulse generator used to further attenuate any pre or post pulse light passing through the first stage of the modulator. The fast rise and fall time of the square pulse generator is also used to produce fast rise and fall times of the AWG by clipping the AWG pulse. For maximum extinction, a pulse bias voltage is applied to each stage of the modulator. A pulse voltage is applied as opposed to a DC voltage to prevent charge buildup on the modulator. Each bias voltage is adjustable to provide a minimum of 50-dB extinction. The AMC is controlled through ICCS to generate the desired temporal pulse shape. This process involves a closed-loop control algorithm, which compares the desired temporal waveform to the produced optical pulse, and iterates the programming of the AWG until the two waveforms agree within an allowable tolerance.
Author | : |
Publisher | : |
Total Pages | : 816 |
Release | : 1999 |
Genre | : Nuclear engineering |
ISBN | : |
Download Proceedings of the 1999 Particle Accelerator Conference Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 372 |
Release | : 1993 |
Genre | : Imaging systems |
ISBN | : |
Download Ultrahigh- and High-speed Photography, Videography, and Photonics Book in PDF, ePub and Kindle