21 Sep A Klystron is a vacuum tube that can be used either as a generator or as an amplifier or as an oscillator, at microwave Klystron. Download scientific diagram| Schematic diagram of a two-cavity klystron amplifier . from publication: Review of high-power microwave source research | This. 31 May Two cavity Klystron Amplifier. Klystron Amplifier The klystron amplifier can be used as an microwave oscillator or amplifier at low and high.

Author: Kagrel Meztilar
Country: Albania
Language: English (Spanish)
Genre: Video
Published (Last): 10 October 2015
Pages: 16
PDF File Size: 10.76 Mb
ePub File Size: 5.35 Mb
ISBN: 149-2-40019-738-9
Downloads: 61712
Price: Free* [*Free Regsitration Required]
Uploader: Voodoobar

Know about Klystron Amplifier Types with Applications

The beam is focussed to travel axially so that it doesn’t spread by the means of applied external magnetic field. For the generation and amplification of Microwaves, there is a need of some special tubes called two cavity klystron amplifier Microwave tubes. The following figure indicates the electron flow when the field is in the opposite direction.

Based on tw resonant cavities, klystron amplifiers are classified into two types. The oscillations excited in the catcher cavity are coupled out through a coaxial cable or waveguide. Potentiometer digital Variable capacitor Varicap. The RF two cavity klystron amplifier microwave is given at the buncher cavity which we want to be amplified. Unknown 27 April at When the device is ampkifier on, electronic noise in the cavity is amplified by the tube and fed two cavity klystron amplifier from the output catcher to the buncher cavity to be amplified again.

At one end of the tube is the hot cathode which produces electrons when heated by a filament. Two Cavity Klystron Amplifier. In the next post we will see the variant of two cavity klystron called Reflex klystron If the capacitor is charged with reverse polarity, then the direction of the field is also reversed.

This page was last edited on 17 Julyat The space outside the Buncher grids is called the drift space. This space is long enough so that the accelerated electrons two cavity klystron amplifier up with electrons that were accelerated at an earlier time, forming “bunches” longitudinally along the beam axis. Initially, the first cavity resonator is supplied with a weak high frequency signal, which has to be amplified.


The formation of electron bunches takes place in the drift space between the reflector and the cavity. Hansen was instrumental two cavity klystron amplifier the development klystrob the klystron and was cited by the Varian brothers in their paper.

Electron beam Microwave technology Accelerator physics Vacuum tubes American inventions. The making of electron bunches takes place in the drift space two cavity klystron amplifier the cavity and reflector. The current in this coaxial cable sets up a magnetic field, by which an electric field originates.

Klystron amplifiers are velocity modulated and high power two cavity klystron amplifier vacuum tubes which are used as an amplifiers in some radar devices. Klystton Post Older Post Home. Unsourced material may be challenged and removed. The beam first passes through the “buncher” cavity resonator, through grids attached to each side. In all modern klystrons, the number of cavities exceeds two.

The electrons emitted by the cathode amp,ifier accelerated towards the first resonator. The work of physicist W. While moving, these electrons enter the field free space called as the drift space between the resonators with varying speeds, which create cavjty bunches.

The plate that has more electron deposition will be the cathode and the plate which has lesser number of electrons becomes the anode.

Electrons entering when the entrance grid is negative and the exit grid is positive encounter an electric field in two cavity klystron amplifier same direction as their motion, and are accelerated by the field.

This phenomenon of the variation of electrons in electron beam is known as Velocity Modulation.


Klystron – Wikipedia

The voltage on the reflector must be adjusted so that the bunching is at a maximum as the two cavity klystron amplifier beam re-enters the resonant cavity, thus ensuring a maximum of energy is transferred from the electron beam to the RF oscillations in the cavity.

The electrons thus do work on the electric field, tao are decelerated, their kinetic energy is converted to electric potential energyincreasing the amplitude of the oscillating electric field in the cavity. These will set up a field in the third cavity, which produces more concentrated two cavity klystron amplifier and so on.

The output signal can be coupled back into the input cavity to make an electronic oscillator to generate radio waves.

The anode voltage V0 and buncher cavity gap having length ‘d’ are adjusted such that time taken by beam to pass through two cavity klystron amplifier is less than quarter time period of input RF signal. An external electromagnet winding creates a longitudinal magnetic field along the beam axis two cavity klystron amplifier prevents the beam from spreading. After permitting through the resonant cavity they are amplifiee by a amplirier charged reflector electrode for an alternative pass through the cavity, where they are two cavity klystron amplifier composed.

The catcher grids are located with a bean, at a place where the Bunches are totally formed. Special lightweight nonmagnetic or rather very weakly diamagnetic tools made of beryllium alloy have been used for tuning U. Klystrons can be found at work in radarsatellite and wideband high-power communication very common in television broadcasting and EHF satellite terminalsmedicine radiation oncologyand high-energy physics particle accelerators and experimental reactors.