JPS5818840A - Microwave tube device - Google Patents

Abstract

PURPOSE:To obtain an easy to handle microwave tube device by arranging a high power traveling-wave tube or klystron so that the lower end face of an electron gun can become higher than that of an electron beam focussing field device and a guide rail or moving wheel on the lower end face of the electron beam focussing field device. CONSTITUTION:A high power microwave tube 1 is installed on a permanent magnet assembly 2 and mounted on a bench 3. A non-magnetic spacer is arranged between the permanent magnet assembly 2 and bench 3. Since this non- magnetic spacer 6 is fixed in the permanent magnet assembly 2, it can be moved simultaneously when the permanent magnet assembly is moved. Since an electron gun 4 is placed in the combined body of the permanent magnet assembly and non- magnetic spacer by the arrangement of this non-magnetic spacer 6, it will not collide with the bench when it is moved. As a result, since the microwave tube need not be removed from the permanent magnet or lifted up, it can be handled easily. The microwave tube can be handled more easily by fitting a moving wheel in this permanent magnet assembly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a microwave tube device, such as a high power traveling wave tube or a high power klystron, including an electron beam focusing magnetic field device.

The microwave tube includes an electron needle that emits an electron beam, a high-frequency interaction section for interaction between a high-frequency signal and the electron beam, and a signal wave applied to the high-frequency interaction section or a signal wave from the high-frequency interaction section. It consists of an input/output coupling section for extracting signal waves and a collector section for capturing the electron beam that has passed through the high-frequency interaction section and is no longer used.It amplifies weak high-frequency signals and generates strong signal waves. It has the function of emitting radiation.

In traveling wave tubes and klystrons, in order to make the electron beam emitted from the electron gun reach the collector in a focused state in the form of a thin string, it is necessary to apply a magnetic field to the electron gun or permanent magnet from outside the tube. be. In the case of a high-power traveling wave tube or a high-power microwave tube of a high-power klystron, there is a large amount of electric current tIt (i.e., electron beam) to be focused.
The focusing magnetic field also needs to be made stronger, and as a result the electromagnets and permanent magnets also become larger and heavier. When it comes to large items, those with a length of more than 1 liter or weight of more than 500 kf become difficult to handle.

When a high-power microwave tube is attached to such an electromagnet, the electron gun is usually located below the lower end surface of the electromagnet or permanent magnet in order to optimize the magnetic field distribution of the electron gun. ing.

Since a heavy electromagnet is usually held on a stand, it is necessary to drill a hole in the center of the stand for the electron gun. Therefore, when trying to change the position of the electromagnet or permanent magnet with respect to the stand, in order to prevent the electron gun from colliding with the stand, the microwave tube must be moved away from the electromagnet or permanent magnet, and then the magnet must be moved and then repositioned again. There was the inconvenience of having to wear it.

The present invention eliminates these drawbacks of the conventional type and provides a microwave tube device that is easy to handle.

The present invention relates to a microwave tube device comprising an electron gun, a microwave tube comprising a high-frequency interaction section, an input/output coupling section, and a collector section, and an electron beam focusing magnetic field device provided outside the microwave tube. , the lower end surface of the electron gun of the microwave tube is arranged above the lower end surface of the electron beam focusing magnetic field device. Furthermore, a guide rail or a movable wheel is provided on the lower end surface of the electron beam focusing magnetic field device.

The present invention will be explained below using the figures.

FIG. 1 is a partial sectional view of a microwave tube device that combines a conventional high-power microwave tube and a permanent magnet. In FIG. 1, a high power microwave tube 1 is mounted on a permanent magnet assembly 2 and placed on a stand 3.

At this time, the electron gun section 4 of the high-power microwave tube 1 is exposed below the base 3 through a hole 5 made in the base 3. Therefore, when attempting to move the microwave tube device on the stand, the high-power microwave tube must be removed from the permanent magnet assembly to prevent the electron gun unit 4 from colliding with the stand 3, or the entire microwave tube device must be moved. needed to be lifted.

FIG. 2 shows a partial cross section of a microwave tube device according to the invention. According to FIG. 2, a high-power microwave tube 1 is attached to a permanent magnet assembly 2 and placed on a stand 3, and a non-magnetic spacer 6 is arranged between the permanent magnet assembly 2 and the stand 3. . Since this non-magnetic spacer 6 is fixed to the permanent magnet assembly 2, it can be moved simultaneously when the permanent magnet assembly is moved. Due to the arrangement of the non-magnetic spacer 6, the electron gun 4 is inside the composite body of the permanent magnet assembly and the non-magnetic spacer, so that it does not collide with the table during movement. Therefore, there is no need to pull out the microwave tube from the permanent magnet, and there is no need to lift it, making handling extremely easy. By adding a movable wheel to Jin's permanent magnet assembly, it becomes even easier.

Although FIG. 2 shows the case of air-cooling and permanent magnet focusing, a water-cooled sphere or electromagnetic focusing may also be used. Furthermore, in addition to the block shown in FIG. 2, the spacer 6 can be made of various types, such as a hollowed-out spacer or a combination of pillars, and in this case, the spacer 6 also has the feature of being lightweight.

In Figure 2, a spacer 6 was added to prevent the electron gun from coming out from the bottom of the microwave tube assembly, but the electron gun was made smaller to prevent it from coming out from the bottom of the microwave tube assembly. Good too.

Also, regarding mobility, a movable wheel is attached, but in addition to simply attaching a movable wheel, rails may be added, or movement may be performed using gears or the like.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of a conventional microwave tube device, and FIG. 2 is a partial sectional view of an embodiment of the microwave tube device according to the present invention. 1...--High power microwave tube, 2...--Permanent magnet assembly, 3--...Stand, 4...-Electron gun section, 5...- - Hole, 6... Spacer.

Claims (2)

[Claims] (1) A microwave tube device consisting of an electron gun, a microwave tube consisting of a high-frequency interaction section, an input/output coupling section, and a collector section, and an electron beam focusing magnetic field device provided outside the microwave tube. A microwave tube device characterized in that the lower end surface of the electron gun of the microwave tube is arranged above the lower end surface of the electron beam focusing magnetic field device. (2) The microwave tube device according to claim (1), characterized in that a guide rail or a movable wheel is provided on the lower end surface of the electron beam focusing magnetic field device.