SU754518A1 - Microwave resonator for non-sinusoidal periodic waveform - Google Patents

Description

The invention relates to three-dimensional resonators used in microwave 0-type devices, a 'also in charged particle accelerators.

Known cavity resonators,. within which is placed an additional oscillatory system, tuned to a higher harmonic. The addition of voltages of the main and higher harmonics provides a non-sinusoidal periodic signal [1].

The closest in technical essence to the present invention is 1 cavity resonator for a non-sinusoidal periodic waveform consisting of a main two-phase resonator having a cylindrical shell and a transit tube ί tuned to the first harmonic, and an additional resonator located coaxially with the main resonator. inside it and tuned to the second harmonic and made in 2 forms of two metal semi-cylinders attached to the shell of the resonator and the span tube, divided into two parts by an additional '

• clearance (2). 3

2

However, this design cannot be used in devices with periodic magnetic focusing of the electron beam, since it has a considerable length along the axis of the electron beam, which is associated with the use of the main two-resonator resonator. During periodic magnetic focusing, the magnetically conducting diaphragms must be spaced from each other at distances significantly smaller than the dimensions of a two-gap resonator.

The purpose of the invention is to reduce the axial length of the resonator.

This goal is achieved by the fact that the main resonator is made single-gap, and an additional toroidal resonator is connected to the side wall of the main resonator.

FIG. 1 and 2 two variants of the proposed cavity resonator are shown; in fig. 5 and 5 are diagrams explaining the principle of reducing the length of a single-gap resonator compared to a two-gap one.

Main spreader toroidal

type is formed by a segment of cylinder 1,

two walls 2, cylinder length

3

/ 54518

four

3, the wall of the 4 and the passage tube 5. The additional resonator is formed by a segment of the cylinder 3, walls 2 and 4 and the span tube 5. The span tubes 5 form with the walls 2 modulating gaps 6 and 7 of the main resonator and the additional resonator. Wall 2 is simultaneously used as a magnetic conductive diaphragm.

The proposed resonator works as follows.

The stream of charged particles, flying into the gap 6, interacts with the microwave poems at the fundamental frequency, then, slandering into the gap 7, interacts with the microwave ale of the second harmonic of the additional resonator. As a result, the sum: the south exposure to the microwave fields of two frequencies the electron flow turns out to be modulated by a non-sinusoidal periodic signal.

To compare the axial length of the proposed resonator and the known one, consider the schemes of two-gap and single-cavity resonators (FIG. 3). Since the distance between the centers of the gaps of the two-gap resonator is determined based on the condition

.to the comparison (see Fig., Za and c) it follows that.

TS cho si /

where b is the length of a two gap gap! Nator;

I is the length of the single gap resonator;

ί. - distance between centers

gaps dvuhzatornogo resonator;

\ At _About - speed unperturbed

electron flow in the device;

M is the circular resonant frequency of the resonator.

Usually 'and therefore length

* and io

A dowel resonator can be 2 or more times longer than a single gap resonator. ,

The calculations and measurements show the full possibility of placing in the toroidal resonator used in one of the 0-type instruments, an additional resonator for the second harmonic, according to the proposed design, without increasing its length.

The use of the proposed resonator will allow using the advantages of non-sinusoidal speed modulation in 0-type devices with periodic magnetic focusing.

Claims (1)

Claim A microwave cavity resonator for a non-sinusoidal periodic waveform, consisting of a main resonator tuned to the first harmonic, and an additional toroidal resonator located coaxially with the main resonator inside it and tuned to the second harmonic, characterized in that in order to reduce the axial length the resonator system, the main resonator is made single-gap, and an additional toroidal resonator is connected to the side wall of the main resonator.