Linear Accelerator Magnetron

Ref. M11

The MAGNETRON is a device that produces microwaves. It functions as a high-power oscillator, generating microwave pulses of several microsecond’ duration and with a repetition rate of several hundred pulses per second. The frequency of the microwaves within each pulse is about 3000MHz. The generated microwave pulses.

The magnetron has a cylindrical body, having a central cathode around an axial filament, generating electrons, and an outer anode with resonant cavities machined out of a solid piece of copper.

A static magnetic field is applied perpendicular to the plane of the cross-section of the cavities and a pulsed DC electric field is applied between the cathode and the anode.

Under the simultaneous influence of the magnetic field and the pulsed DC electric field the electrons move in complex spirals toward the resonant cavities in the copper anode, radiating energy in the form of microwaves.

The generated microwave pulses are led to the linear accelerator structure via a complex waveguide. (From the internet)

View this Interesting video.