The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Physical mechanism of pulse shorten in coaxial virtual cathode oscillator (VCO) is analyzed theoretically. Anode plasma is one of the most key factors in causing pulse shorten according to the analytical results. Pulse shorten is suppressed based on controlling of generation and diffusing of anode plasma. GW level experiment has been designed to verify the above conclusion. The effects of process...
In this paper, the effect of the gases absorbed on the surface of the RBWO high-frequency structure and the background gases inside the system on the pulse duration of high power microwave is analyzed. To simulate the plasmas originating from the ionized gases, a PIC model is studied. Simulation results show that the microwave power declines and the pulse-duration decreases with plasma filled in the...
Frequency agility is necessary for many applications of high-power microwave sources. To expand the frequency-tuning bandwidth of the backward-wave oscillator (BWO) with an extracting cavity while holding high efficiency and less amplitude fluctuation, a dual-mechanical tuning method by changing the drift length and the cavity length in synchronism is investigated in this paper. A bandwidth of about...
Frequency agility is necessary for many applications of high power microwave sources. To expand the frequency tuning bandwidth of the BWO with an extracting cavity while holding a high efficiency and a less amplitude fluctuation, a dual-mechanical tuning method by changing the drift length and the cavity length in synchronism is investigated in this paper. A bandwidth of about 750MHz around 9.6GHz...
This paper theoretically analyzes the influence of distance between Bragg reflector and slow wave structure on output power of relativistic backward wave oscillator (BWO). According to the phase relation between the RF current in electron beam and axial electric field in structure, the optimal distances are suggested. More analyses on this characteristic of BWO with Bragg reflector has been conducted...
This paper presents proposes a method of improving the input power to inhibit parasitic oscillations. Particle-in-cell simulation results indicate that the relativistic klystron amplifier driven by strong input power is a potential device to attain high stability, high efficiency, wide bandwidth, and frequency and phase locking. An electron beam of 200 keV, 1k A is used in simulation. Under the condition...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.