Klystron Tube

January 25, 2024 Post a Comment

Klystron tube

klystron, thermionic electron tube that generates or amplifies microwaves by controlling the speed of a stream of electrons.

What are the types of klystron tube?

A klystron has one or more special cavities around the axis of the tube that modulate the electric field. Due to the number of the resonant cavities, klystrons are divided up into two-cavity klystrons, multi-cavity klystrons, and repeller klystrons.

How klystron tube works as a microwave source?

This microwave generator, is a Klystron that works on reflections and oscillations in a single cavity, which has a variable frequency. Reflex Klystron consists of an electron gun, a cathode filament, an anode cavity, and an electrode at the cathode potential. It provides low power and has low efficiency.

What is klystron in detail?

The klystron is a device for amplifying microwave frequency signals that achieve high levels of power gain by applying vacuum tube principles and the concept of “electron bunching”. Klystrons are used in satellite systems, television broadcast, and radar, as well as particle accelerators and medicine.

What is beam voltage?

commonly referred to as the beam voltage. This voltage accelerates the DC electron beam to a high velocity before injecting it into the grids of the buncher cavity. The grids of the cavity enable the electrons to pass through, but they confine the magnetic fields within the cavity.

What are the elements of klystron?

The essential elements of Klystron are electron beams and cavity resonators. Electron beams are produced from a source and the cavity klystrons are employed to amplify the signals. A collector is present at the end to collect the electrons.

What is klystron valve?

A Klystron valve or the magnetron valve are generally used for the production of electromagnetic waves and that electromagnetic wave is Microwave. Microwaves are also known as the heating waves. They are used in microwave ovens for heating and for cooking purposes.

What are the advantages of a klystron microwave tube?

Advantages of Klystron Amplifiers They can be used to generate far higher microwave power that solid state microwave devices like Gunn diodes. They can operate over a wide frequency range from hundreds of MHz (UHF) through hundreds of GHz.

What is the difference between klystron and magnetron?

The magnetron used only as an oscillator. In a klystron, the electron is injected normally from the cathode. But in the case of magnetron, the electrons are forcefully injected. In a klystron, the electrons move linearly in the tube and in the magnetron, the electrons follow a spiral path from cathode to anode.

Which type klystron can be used as amplifier?

The two-cavity klystron is the simplest klystron tube. It includes two microwave cavity resonators namely the buncher & the catcher. This klystron can be used as an amplifier.

What is klystron mount?

Klystron mounts are used to transmit microwave power from reflex klystron tube to rectangular waveguide. Klystron mounts are designed by a section of waveguide, one end of waveguide is fitted with a movable short plunger.

What is the difference between TWT and klystron?

The main difference between the operation of a TWT and a klystron is that while the TWTs' circuit operates in a non-resonant mode, the klystrons' circuit operates in a resonant mode. Therefore, the electronic conversion efficiency is relatively low for TWTs and fairly high for klystrons.

What is two cavity klystron amplifier?

Definition: Klystrons are a special type of vacuum tubes that find applications as amplifiers and oscillators at microwave frequencies. Its principle of operation is velocity modulation. Thus the device used for amplifying microwave signals is known as Two-cavity Klystron.

What is velocity modulation in klystron?

In the reflex Klystron tube, velocity modulation takes place near the accelerating grid. Velocity modulation is a variation of velocity of the electron beam. It allows the passage of an electron beam through a resonant cavity.

Why klystron is used?

Low-power klystrons are used as oscillators in terrestrial microwave relay communications links, while high-power klystrons are used as output tubes in UHF television transmitters, satellite communication, radar transmitters, and to generate the drive power for modern particle accelerators.

What is beam current?

The beam current is the basic quantity of the beam, It is the first check of the accelerator functionality and is very important for transmission measurement and to prevent for beam losses. Different devices are used for this goal, but the LHC circulating beam current measurement is provided by current transformers.

Why do you need catcher cavity?

The function of the “catcher” cavity is to absorb energy from the electron beam. The “catcher” grids are placed along the beam at a point where the bunches are fully formed.

What is buncher cavity?

The buncher cavity is a copper cavity that has a spherical reentrant shape, which was optimized using the SLANS computer code [4]. Its geometry is shown in Figure 1.

Which is not microwave tube?

LED ( Light emitting diode) is not a microwave device. Frequency spectrum of LED is different from the frequency spectrum of microwave. The Uttar Pradesh Rajya Vidyut Utpadan Nigam Limited (UPRVUNL) has released the official notification for the UPRVUNL JE Recruitment 2022.

Why multi cavity klystron is preferred?

Multicavity klystron, cascade amplifier, high power microwave generation, RF signal amplification. 7.7]. The advantages of klystrons are their high power and efficiency, potentially wide bandwidth, phase and amplitude stability, [BenSweScha, 9.1].