KR0125496Y1 - Klystron - Google Patents

Abstract

The present invention relates to a klystron that generates microwaves, wherein a tube 50 is disposed between the cathode 11 and the collector 71 to modulate the density of the electron beam accelerated from the cathode 11 toward the collector 71. In the Klystron, the tube 50 is a tube body 51 formed in a stepped container shape, the plate (53, 55, 57, 59) is joined to the step portion in the tube body 51 to form a cavity; And channel channels 61, 63, 65, 67, and 69 disposed in the tube body 51 through the tube body 51 and the plates 53, 55, 57, and 59 to form a passage of the electron beam. Characterized in that, because it is configured as described above, while reducing the material cost and processing cost of the tube while at the same time beautiful appearance and reduces the manufacturing cost of the tube.

Description

klystron

1 is a longitudinal sectional view showing a conventional klystron.

2 is a perspective view showing the tube body of FIG.

Figure 3 is a longitudinal cross-sectional view showing a klystron according to an embodiment of the present invention.

4 is a perspective view showing the tube body of FIG.

* Explanation of symbols for main parts of the drawings

11: cathode 50: tube

51: tube body 53, 55, 57, 59: plate

61,63,65,67,69 Channel Channel 71 Collector

The present invention relates to a klystron for generating microwaves, and more particularly to a klystron having a tube body of a stepped container type.

Conventionally, as shown in FIG. 1, a klystron forming a plurality of electron beams includes a cathode 11 for emitting electrons, a collector 13 for collecting electrons generated from the cathode 11, and the cathode ( A tube 40 disposed between the cathode 11 and the collect 13 so as to modulate the density of the plurality of electron beams 15 composed of electrons accelerated from the collector 13 to the collector 13 and the electron beam 15 Left right magnets (17, 19) and the left right magnets (17, 19) to form a magnetic flux along the longitudinal direction of the electron beam 15 to prevent the diffusion of the electron beam 15 to maintain a constant size Is disposed on the left and right pole pieces 21 and 23, the heater 25 for heating the cathode 11 to generate electrons from the cathode 11, and the electrons colliding with the collector 13. To the collector 13 to release heat generated from the collector 13 to the outside. The installed heat dissipation member 27, the collector 13 and the heat dissipation member 27 are fastened to the left and right sides by fastening means, and at the same time, the support member 29 supporting the right pole piece 23 and the density change. It consists of an output stage 31 which draws microwave energy from the tube 40.

Further, an acceleration means (not shown) is provided between the cathode 11 and the collector 13 to apply a constant voltage between the cathode 11 and the collector 13 to accelerate the electron beam 15.

In addition, a concave surface is formed at a plurality of portions of the surface of the cathode 11 facing the collector 13 so that electrons generated from the cathode 11 form a plurality of electron beams 15, and other than the concave surface. The cathode 11 surface is coated with a material (molybdenum or the like) for suppressing electron emission on the cathode 11 surface other than the concave surface so that electrons are not emitted.

The left and right magnets 17 and 19 are respectively disposed outside the cathode 11 and the collector 13 so as to form magnetic flux in a direction opposite to the direction of electrons flowing from the cathode 11 to the collector 13. The inner circumferential surface of the left magnet 17 is formed of the S pole, and the outer circumferential surface thereof is formed of the N pole, and the inner circumferential surface of the right magnet 19 is formed of the N pole, and the outer circumferential surface thereof is the S pole. Formed.

Supports 33a and 33b for supporting the heater 25 are disposed on the left side of the heater 25, and ceramics for supporting the supports 33a and 33b on the left ends of the supports 33a and 33b. The holder 35 is disposed, and lugs 39a and 39b to which the electric wires 37a and 37b are connected are electrically arranged on the left side of the ceramic holder 35 so as to be electrically connected to a power supply device (not shown).

A coil (not shown) for generating resistance heat according to the supply of power is disposed inside the heater 25, and one end of the heater 25 is electrically connected to the coil to supply power to the coil. At the same time, wires (not shown) that are electrically connected to the lugs 39a and 39b at the other end are disposed.

The tube 40 is composed of a tube body 41 and a channel tube 43 disposed in the tube body 41 to form a passage through which the electron beam 15 flows.

At the end of the heat dissipation member 27, a plurality of heat dissipation fins 271 having a wide contact area with external air are arranged at regular intervals so that heat generated from the collector 13 is easily discharged to the outside.

At the end of the heat dissipation member 27, a plurality of heat dissipation plates 271 having a large contact area with external air are arranged at regular intervals so that heat generated from the collector 13 is easily discharged to the outside.

The tube 40 is composed of a tube body 41 and a channel tube 43 formed in the tube body 41 to form a passage through which the electron beam 15 flows.

In the tube body 41, a plurality of cavities 411, 412, 413, 414 for inducing density modulation of the electron beam 15 by varying the speed of the electron beam 15 are passed through, and are not shown in the cavities 411, 412, 413, 414. The gaps 431, 432, 433 and 434, to which the high frequency electric field is applied, are formed by the signal source, and the channel pipe 43 in which the plurality of drift spaces 435 are formed to penetrate between the adjacent gaps 431, 432, 433 and 434 is disposed.

That is, the gaps 431, 432, 433, 434 and the plurality of drift spaces 435 are formed by a plurality of gap spaces and through holes formed in the channel tube 43.

The output end 31 is disposed in the cavity 414 adjacent to the collector 13.

On the other hand, the tube body 41 is a hexahedral shape, as shown in Figure 2, the tube body 41 is formed so that a plurality of cavities (411, 412, 413, 414) penetrates from the front to the rear, the cavity (411, 412, 413, 414) The first through hole 415 is formed in the center of the side of the tube body 41 in the direction perpendicular to the penetrating direction of the tube body 43 so as to be discharged by insertion. The second through hole 416 is formed in the direction of the fourth cavity 414 with respect to the upper surface so as to arrange the output end 31.

In the conventional Klystron configured as described above, when power is applied to an acceleration unit (not shown), a heater (25) and a signal source (not shown), the heater (25) is formed by the resistance heat of the coil (not shown) disposed in the heater (25). Generates heat to heat the cathode 11. When the cathode 11 is heated to a high temperature, electrons are emitted from the concave surface of the cathode 11.

The electrons are formed into a plurality of electron beams 15 through a plurality of through holes formed in the channel tube 43 by an acceleration voltage applied between the cathode 11 and the selector 13 by an acceleration unit (not shown). While being introduced into the channel pipe 43 of the tube 40. At this time, the electron beam 15 is prevented from being diffused by the magnetic flux in the direction formed by the left and right magnets 17 and 19 to be maintained at a constant size and further accelerated by the magnetic flux density of the magnetic flux in the arrow direction. That is, since the electrons are the flow of particles, the flow force of the electrons flowing in the right direction increases as the magnetic flux density of the magnetic flux formed in the N pole in the S pole direction increases.

When the electrons introduced into the channel tube 43 of the tube 40 reach the gap 431 of the first cavity 411, a high frequency electric field is formed in the gap 431 by a signal source (not shown). The electrons vary in speed by this high frequency field. That is, these electrons are speed modulated.

The speed modulated electrons advance the speed of each modulated field as the electric field passes through the changed drift space 435. Therefore, the accelerated electrons move forward than the average, and the decelerated electrons are later than the average so that the electrons form a lump. This action causes non-uniformity of electron density in each electron beam. That is, each electron beam 15 is density modulated.

When the electrons in the electron beam 15 continue to reach the second cavity 412, the third cavity 413, and the fourth cavity 414 sequentially, the speed modulation of the electrons occurs by the above-described action. For this reason, the electron density of the part where the electron density was high in the electron beam 15 becomes further high. The electron beam 15 having this high electron density is converted into microwave energy by an output circuit not shown in the fourth cavity 414 and output to the outside through the output stage 31. That is, the kinetic energy of the electron due to the energy of the density change of the electron beam 15, the kinetic energy of the electron due to the acceleration voltage of the acceleration means (not shown), and the magnetic flux density of the magnetic flux formed by the left right magnets 17 and 19 Is output to the outside through the output terminal 31.

It is experimentally known that the density modulation tendency of the electron beams 15 increases in proportion to the inner surface area of each cavity.

Electrons that have lost kinetic energy due to output, that is, electrons, which are mediators of the density change of the electron beam 15, continue to reach the surface of the collector 13. Electrons that reach the surface of the collector 13 are absorbed and extinguished by the collector 13 while colliding with the surface of the collector 13. At this time, the kinetic energy of the electrons hitting the collector 13 surface by the kinetic energy that is not converted into microwave energy is converted into thermal energy, and the thermal energy is dissipated to the outside through the heat radiating member 27.

By the way, in the conventional klystron configured as described above, the tube body 41 of the tube 40 is formed of one member. Therefore, in order to manufacture the tube body 41, first, a solid material (solid member) having a hexahedron shape is prepared, and the wires forming the plurality of cavities 411, 412, 413, 414 and the first through hole 415 of the solid material. After cutting, drilling is performed to form the second through hole 416.

The wire cutting processing method is a processing method of forming a through hole or contour having a constant shape in a workpiece by using a cutting tool called a wire. That is, in order to form a through hole having a predetermined shape in the workpiece by the wire cutting method, first, a small through-hole is inserted into the surface of the workpiece to be inserted into the surface of the workpiece, such as by drilling machine. The wire and the workpiece are installed in the wire cutting machine while being inserted through the small through hole.

Next, by moving the wire along the circumferential surface of the through hole to be formed by operating a wire cutting machine, it is possible to form a through hole of a desired shape in the workpiece.

In order to form a plurality of through holes in one workpiece by the wire cutting process, the wires must be attached and detached according to the number of through holes, so that continuous cutting operations are not possible, thereby increasing the processing time.

Therefore, the tube body 41 formed of a single member is manufactured by removing unnecessary parts from a solid material (solid member), so that there is a lot of material loss, and is manufactured by cutting such as wire cutting and drilling. The long time had a problem in that the overall cost of manufacturing Klystron.

The present invention is made to solve such a problem, the object of the present invention is to form a cavity by easily bonding the plate to the tube body of the staircase container type, reducing the material cost and processing cost of the tube to reduce the manufacturing cost of the tube To provide Klystron.

The klystron according to the present invention made to achieve the above object is a klystron in which a tube is disposed between the cathode and the collector to modulate the density of the electron beam accelerated from the cathode to the collector, wherein the tube is formed in a stepped container shape. A main body, a plurality of plates joined to the stepped portion in the tube body to form a cavity, and a plurality of channel tubes disposed in the tube body through the plate to form a passage of the electron beam, characterized in that the.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected about the part same as the part shown in FIG. 1, and the overlapping description is abbreviate | omitted.

As shown in FIGS. 3 and 4, on the right side of the cathode 1, a tube 50 is arranged to modulate the density of a plurality of electron beams 15 composed of electrons introduced from the cathode 11. On the right side of the tube 50, a collector 71 is disposed to absorb electrons that output microwave energy while passing through the tube 50. On the right side of the collector 71, the collector 71 is disposed. The heat radiating member 73 is arrange | positioned so that the heat | fever which generate | occur | produces from the collector 71 may be discharged | emitted to the outside by the electron which hit | attains the

The tube 50 has a tube body 51 having a hollow staircase cylindrical shape on its own, and plates 53, 55, 57, 59 forming a cavity are sequentially formed on the stepped portion of the tube body 51. And the channel pipes 61, 63, 65, 67, and 69 pass through the plates 53, 55, 57, and 59 in the tube body 51 to form a passage of the electron beam 15. It is an excreted structure.

The tube body 51 has a hollow cylindrical shape having four stages so that the first, second, third, and fourth cavities 511, 512, 513, and 514 are easily formed by the plates 53, 55, 57, and 59. The through-hole 515 is formed at the inner end of the channel tube 69 so that the channel tube 69 is inserted and disposed, and the output end 31 is inserted and disposed at the outer circumferential surface of the fourth stage forming the fourth cavity 514. The through-hole 516 is formed as much as possible.

Through-holes 531, 551, 571, 591 are formed at the center of the plates 53, 55, 57, 59 so that the channel tubes 61, 63, 65, 67 are inserted and disposed. The plate 57 is embossed to increase the inner surface area of the second cavity 512 and the third cavity 513 at regular intervals from the circumferential surface of the through hole 571. An embossed portion 572 is formed.

A plurality of through holes are formed in the channel tubes 61, 63, 65, 67, and 69 to guide the electron beam 15.

The collector 71 is provided with a concave inlet 711 to facilitate the absorption of electrons, and at the end of the heat dissipation member 73 so that heat generated from the collector 71 is easily discharged to the outside. A plurality of heat dissipation fins 731 having a large contact area with each other are formed.

The operation and effects of Klystron according to an embodiment of the present invention configured as described above will be described below.

In order to manufacture the tube 50, first, the tube body 51, the plates (53, 55, 57, 59) and the channel tubes (61, 63, 65, 67, 69) are pressed or cut into the above-described shapes. After processing, the channel pipes 61, 63, 65, and 67 are inserted into the through holes 531, 551, 571, and 591 of the plates 53, 55, 57, and 59 by a fixed amount, and joined to each other by welding or the like.

Next, the channel tubes 69 are inserted into the through holes 515 of the tube body 51 and joined to each other by welding, and then the plates 59 to which the channel tubes 67, 65, and 63 are coupled, respectively. And 57 and 55 are inserted into the tube body 51 and sequentially welded to the stepped portions of the tube body 51, and then the plate 53 to which the channel tube 61 is coupled is connected to the tube body. If it welds closely to the edge part of 51, manufacture of the said tube 50 is completed.

At this time, since the end is formed on the inner surface of the tube body 51, the plates (59, 57, 55) can be easily bonded to a predetermined position.

The tube body 51 is not only simply manufactured by press working in a stepped cylindrical shape, but also has a small amount of material discarded.

Therefore, the material cost and processing cost of the tube 50 is reduced and the manufacturing cost thereof is reduced.

As described above, the Klystron according to the present invention forms a cavity by easily joining a plate to a tube body of a stepped container type, thereby reducing the material cost and processing cost of the tube and reducing the manufacturing cost of the tube. It is a practical design.

Claims (2)

In Klystron, in which the tube 50 is disposed between the cathode 11 and the collector 71 to modulate the density of the electron beam accelerated from the cathode 11 toward the collector 71, the tube 50 is a step. A tube body 51 formed in a container shape, plates 53, 55, 57, and 59 joined to the stepped portion of the tube body 51 to form a cavity, and the tube body to form a passage of the electron beam. A klystron characterized by consisting of channel tubes (61, 63, 65, 67, 69) disposed in (51). The klystron according to claim 1, wherein the tube body is formed in a hollow cylindrical shape.