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Author: Publisher: ISBN: Category : Languages : en Pages : 22
Book Description
The objective of this research program was to explore tapering of interaction tubes and magnetic fields as techniques for enhancing the performance of high power microwave gyrotron-backward-wave- oscillators (gyro-BWOs). Experiments were performed on the Michigan Electron Long-Beam Accelerator, (MELBA), which operated with parameters: voltage=O.7-O.9 MV, diode current = 1-10 kA, injected current = 1-4 kA, and pulselengths of 0.5-i microsecond. Microwave emission frequency was in the range from 4.5-6 GHz. Experiments on the fundamental cyclotron wave showed peak microwave tube power up to 40-55 MW over shortened pulselengths (
Author: Publisher: ISBN: Category : Languages : en Pages : 22
Book Description
The objective of this research program was to explore tapering of interaction tubes and magnetic fields as techniques for enhancing the performance of high power microwave gyrotron-backward-wave- oscillators (gyro-BWOs). Experiments were performed on the Michigan Electron Long-Beam Accelerator, (MELBA), which operated with parameters: voltage=O.7-O.9 MV, diode current = 1-10 kA, injected current = 1-4 kA, and pulselengths of 0.5-i microsecond. Microwave emission frequency was in the range from 4.5-6 GHz. Experiments on the fundamental cyclotron wave showed peak microwave tube power up to 40-55 MW over shortened pulselengths (
Author: THOMAS ALLEN SPENCER Publisher: ISBN: Category : Languages : en Pages : 340
Book Description
the existence of the gyro-backward-wave, as well as show the magnetic tunability of the gyrotron-backward-wave. In the solid beam case (1-2 kA), about 300-800 kW of extracted microwave power was detected in the waveguide detection system, implying that approximately 3-8 MW (efficiency $\sim$1-2%) of power is generated from the gyro-BWO device. The pulselengths for the solid beam case were from 300-600 ns (essentially the total flat-top voltage pulselength) over a frequency range of 4.5-6 GHz. The
Author: C Edgecombe Publisher: CRC Press ISBN: 1482272369 Category : Technology & Engineering Languages : en Pages : 447
Book Description
The performance of gyrotrons has developed rapidly during recent years and they now form very powerful sources of microwave energy at millimetric wavelengths. Much development, both of the detailed theory including multi-mode interaction and of practical devices, has taken place in the major European laboratories. This book is a collection of surve
Author: Machavaram V. Kartikeyan Publisher: Springer Science & Business Media ISBN: 3662076373 Category : Technology & Engineering Languages : en Pages : 234
Book Description
Drawing on the author's wide experience, this book gives a comprehensive review of the state of the art in gyrotron technology, covering the theory, design and applications. The book includes an extensive references list which provides an excellent guide to the related literature.
Author: Publisher: ISBN: Category : Languages : en Pages : 113
Book Description
The Pulsed Power and Plasma Science Laboratory at the University of New Mexico (UNM) has completed its initial phase of research on repetitively pulsed high power backward-wave oscillators (BWOs). The aggressive program that we had established seeked to address three basic goals: (1) Understand the physics of high efficiency vacuum BWOs using the Sinus-6 repetitively pulsed electron beam accelerator, (2) study vacuum and initiate plasma-filled long pulse BWO operations using the modified PI-110A accelerator, and (3) Study the prospects of incorporating ferroelectric ceramic cathodes in high power electron beam-driven microwave sources to improve their operations in the long pulse regime.
Author: Thumm, Manfred Publisher: KIT Scientific Publishing ISBN: Category : Technology & Engineering Languages : en Pages : 158
Book Description
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.
Author: S. Y. Park Publisher: ISBN: Category : Languages : en Pages : 36
Book Description
A linear theory for a gyrotron backward wave oscillator (BWO) has been developed and is presented in this report. The theory solves a reduced one-dimensional Maxwell-Vlasov equation in the form of a linear integro-differential equation using Laplace transformation. The relative amplitudes among the waveguide modes and beam modes are completely determined and enable us to determine BWO oscillation conditions. A design is made based upon this analysis including velocity spread effects. A several tens kilowatt power level gyrotron BWO may be possible and find useful applications as rf heating sources in fusion devices and as driving sources in high power gyrotron amplifiers. (Author).
Author: Thumm, Manfred Publisher: KIT Scientific Publishing ISBN: Category : Languages : en Pages : 164
Book Description
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.
Author: Publisher: ISBN: Category : Languages : en Pages : 47
Book Description
Experimental and theoretical analyses, including particle-in-cell computer code simulations, are presented for the Gyrotron Backward Wave oscillator (Gyro-BWO) highpower microwave device. The Gyro-BWO has been designed, constructed, and initially tested as a frequency tunable device. The design has concentrated on a TE01, 4- to 6- GHz annular beam device. The annular beam is produced by the RAMBO pulser, which has a diode voltage of -300 to -800 kV and diode current of 1 to 20 kA. Initial results have shown that the device is operating in the backward wave mode. Initial results have also demonstrated that the device is magnetically tunable; that is, the frequency is tunable by adjusting the magnetic field. A Vlasov-type antenna is used for the extraction of the microwave signal on the diode end of the experiment, with initial power extraction of up to 2 MW ... High power microwave, HPM, Gyro-BWO, Gyrotron, Gyrotron backward wave oscillator.
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Author: 
Author: THOMAS ALLEN SPENCER
Author: Mark Thomas Walter
Author: C Edgecombe
Author: Machavaram V. Kartikeyan
Author: 
Author: Thumm, Manfred
Author: S. Y. Park
Author: Thumm, Manfred
Author: