JP3258062B2 - Gyrotron device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gyrotron device, and more particularly to a structure for fixing an oscillation tube main body and a collector to a gantry.

[0002]

2. Description of the Related Art As is well known, a gyrotron device is
It is an electron tube based on the operation principle of a cyclotron maser, and its use as a high-frequency high-power oscillation source in the millimeter to submillimeter wave band is expanding.

[0003] Such a gyrotron device includes an oscillation tube main body, a cooling device for cooling a collector electrode thereof, and a superconducting magnet for imparting a spiral motion to an electron beam. The oscillation tube body has an electron gun that generates an electron beam, a resonant cavity that interacts with the helically moving electron beam, a collector that captures the electron beam after the interaction, and an electromagnetic wave to the outside. It is provided with a high-frequency output unit provided with a dielectric electromagnetic wave transmission window hermetically sealed so as to take out and maintain a vacuum in the tube. In such a gyrotron device, the electron beam after the interaction was made to travel straight and was captured by the collector portion, and the high frequency was converted to a horizontal direction before the collector, and provided on the side wall of the oscillation tube main body. The configuration of taking out from the output unit has become practical especially for high power.

In some cases, the collector portion is cooled by an evaporative cooling method, and a cooling jacket is mounted so as to surround the collector electrode. The cooling jacket is connected to a steam duct for discharging steam, that is, a refrigerant guide member. High power gyrotron devices can be several meters long and weigh several tons. The mounting pedestals are separately and independently provided, such as a pedestal for fixing the oscillation tube main body, a pedestal for fixing the superconducting magnet, a pedestal for fixing the collector, the cooling jacket, and the refrigerant guide member.

[0005]

In such a large gyrotron device, the center axis is likely to be displaced during assembly and installation. Also, the vibration of the evaporative cooling type collector may be transmitted to the resonance cavity of the oscillation tube main body, and the relative position between the resonance cavity and the magnetic field may be shifted or a subtle swing phenomenon may occur. Such misalignment impairs the normal operation of the gyrotron device. Alternatively, if the relative position of each part is largely displaced, mechanical stress and strain are concentrated on a local part, which may cause damage.

[0006] The present invention solves the above-mentioned inconveniences, and does not mechanically damage or impair the operation even if each part is displaced or the collector vibrates or shakes during operation. It is an object to provide a gyrotron device.

[0007]

According to the present invention, a first semi-fixed vacuum bellows is provided between a high-frequency operation portion of an oscillation tube main body fixed to a high-frequency operation portion fixing base and a collector electrode, and a cooling jacket and a cooling jacket are provided. The second part between the collector base
Is a gyrotron device provided with the semi-fixed bellows.

[0008]

According to the present invention, even if the center axis of each part is displaced during assembly and installation, it is absorbed by the two semi-fixed bellows, and there is no danger that mechanical stress and strain will concentrate on a local part. Therefore, there is no risk of mechanical damage. Further, even if vibration or shaking occurs in the collector portion, the transmission to the resonance cavity portion of the oscillation tube main body is prevented, and the normal operation of the gyrotron device is not impaired. In this way, assembling and installation are easy and reliable operating characteristics can be guaranteed.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. The same parts are denoted by the same reference numerals. The embodiment shown in FIGS. 1 to 4 has the following configuration. The overall configuration will be described with reference to FIG. Floors for installing equipment11
The high-frequency action unit fixing pedestal 12 and the collector unit fixing pedestal 13 are independently installed on the base. The resonance cavity 15 of the gyrotron oscillation tube main body 14 is fixedly held on the high-frequency action section fixing base 12. In addition, the high-frequency action unit fixed base 12 has a socket to which an oil bath 16, a superconducting magnet 17, and an electrode terminal of an electron gun unit are electrically connected.
19 are fixed respectively. A high-frequency output unit 20 is provided on a substantially central side wall of the oscillation tube main body 14, and an ion pump 21 is connected thereto. Further, a collector electrode 22 indicated by a dotted line is provided above the oscillation tube main body 14 in the figure.

Therefore, the first portion of the oscillation tube main body 14 is
The semi-fixed vacuum bellows 23 is provided. The first semi-fixed vacuum bellows 23 is provided with a flange 24
And, provided between the collector electrode supporting flange 25,
A plurality of semi-fixed bolts 26 are mounted on the outer periphery. A boiler jacket for evaporative cooling, that is, a cooling jacket 27 is mounted on the outer periphery of the collector electrode 22. The cooling jacket 27 is liquid-tightly fixed to a lower flange 28 of the collector electrode 22 and mechanically holds the collector electrode 22. Above the cooling jacket 27, a steam duct, that is, a refrigerant guide member 29 is arranged, and this is fixed to the collector fixing frame 13. Therefore, a second semi-fixed bellows 30 is provided between the cooling jacket 27 and the refrigerant guide member 29. The second semi-fixed bellows 30 includes a front flange 31 of the cooling jacket 27 and a flange of the refrigerant guide member.
32, and is supported by a plurality of semi-fixed bolts 33 on the outer periphery. When assembly and installation are completed, the semi-fixed bolt 26 on the outer periphery of the first semi-fixed vacuum bellows 23 is released, and both flanges 24, 25 are free. On the other hand, the semi-fixed bolt 33 on the outer periphery of the second semi-fixed bellows 30 is fastened to the flanges 31 and 32 by nuts and is mechanically and firmly fixed. Thereby, the high-frequency action portion of the oscillation tube main body 14 is fixed to the high-frequency action portion fixing pedestal 12 and is held by it. The collector electrode 22 and the cooling jacket 27 are provided with a plurality of bolts connecting the flanges on both sides of the second semi-fixed bellows 30,
It is mechanically fixed to the collector fixing frame 13 via a nut and a refrigerant guide member 29, and is held thereby. Therefore, the first semi-fixed vacuum bellows 23 is in a state where it absorbs vibration and shaking generated in the collector portion and does not transmit it to the high frequency action portion. On the other hand, the flanges on both sides of the second semi-fixed bellows 30 mechanically hold the collector electrode portion while being restrained by a plurality of bolts and nuts.

Next, the function of each semi-fixed bellows at the time of assembling and installing the gyrotron device will be described with reference to FIGS. First, the oscillation tube main body 14 is fixed to the high-frequency action portion fixing base 12. In this case, as shown in FIG. 2A, the two flanges 24 and 25 sandwiching the first semi-fixed vacuum bellows 23 from above and below are firmly fastened with a plurality of bolts 26 and nuts 35 and 36. It is. In the figure, reference numeral 37 denotes a shield cylinder arranged inside the bellows. In this way, the connection from the electron gun portion of the oscillation tube body 14 to the collector electrode and the cooling jacket is integrally connected. In this state, the cooling jacket 27 is suspended by a crane, and the resonance cavity 15 of the oscillation tube main body 14 is
The oscillation tube main body 14 is fixed to the high-frequency action section fixing pedestal 12. Next, the collector unit fixing frame 13
And a flange 34 of a second semi-fixed bellows 30 at the lower end thereof,
To the front end flange 31 of the main body. Therefore, as shown in FIG. 3, each flange is fitted. The figure shows the oscillation tube body 14
Central axis C1 of the collector electrode 22 and the cooling jacket 27
The figure shows an example in which the center axis C2 of the refrigerant guide member 29 previously fixed to the collector unit fixing base 13 is shifted. This misalignment is absorbed by the second semi-fixed bellows 30. Therefore, the tip flange of the cooling jacket 27
A long hole is formed in the lower end flange 34 of the bellows 31 and the bellows 30.
Insert 33. Then, as shown in FIG.
Nuts 38 and 39 are fitted to the flanges, and the flanges 31 and 34 are firmly fixed. Thereby, both central axes C1, C2
Are connected while being displaced. Finally, as shown in FIG. 2B, the plurality of nuts 35 and 36 fixing the lower flange 24 of the first semi-fixed vacuum bellows 23 are released. A relatively large bolt insertion hole 24a is formed in the lower flange 24, and the upper and lower flanges 24, 25 of the first semi-fixed vacuum bellows 23 are mechanically cut off to be freely movable. .

In this manner, the high-frequency operation portion below the first semi-fixed vacuum bellows 23 of the oscillation tube main body 14 is fixedly held on the high-frequency operation portion fixing base 12, and the collector electrode and the cooling jacket 27 are connected to the collector via the refrigerant guide member 29. It is fixed and held by the part fixing base 13. Therefore, the displacement of each part at the time of assembling and installing the apparatus can be absorbed by the second semi-fixed bellows 30. Then, even if the collector electrode or the cooling jacket vibrates or shakes during the operation, this vibration will be the first vibration.
Absorbed by the semi-fixed vacuum bellows and hardly transmitted to the resonant cavity. In this way, there is no danger of local mechanical stress distortion during assembly, installation, or operation, and no mechanical damage is caused.

In the embodiment shown in FIGS. 5 and 6, a plurality of through holes 40, 40... Are formed in a lower flange 28 of a cooling jacket 27, and the closed disks 28a, 28a ... attached. Then, using a through hole and a sealing disk at a required location, a water pipe 41, a lead 43 of a thermocouple 42 for detecting the temperature of the collector electrode, a monitoring window 44 for internal observation, and other necessary The accessories can be attached interchangeably. This is a cooling jacket
It has the convenience of attaching necessary accessories without replacing 27.

The present invention can be applied not only to the evaporative cooling system but also to a water cooling system or a forced air cooling system.

[0015]

As described above, according to the present invention,
The two semi-fixed vacuum bellows can absorb misalignment of each part during assembly and installation, and vibration and shaking during operation. Therefore, there is no possibility that mechanical stress strain is concentrated on a local part, and there is no possibility of mechanical damage. Also,
Even if vibrations occur in the collector, the vibrations are prevented from being transmitted to the resonance cavity of the oscillation tube main body, and the normal operation of the gyrotron device is not impaired. In this way, assembling and installation are easy and reliable operating characteristics can be guaranteed.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is an enlarged half sectional view showing a main part of FIG. 1;

FIG. 3 is an enlarged front view showing an essential part of the apparatus of FIG. 1 in an assembled state.

FIG. 4 is an enlarged front view showing an essential part of the apparatus of FIG. 1 after assembly.

FIG. 5 is a vertical sectional view of a main part showing another embodiment of the present invention.

FIG. 6 is a cross-sectional view of a main part of FIG.

[Explanation of symbols]

14… Oscillation tube body, 15… Resonant cavity (high frequency action part), 17
... magnetic field device, 12 ... fixed base for high frequency action part, 22 ... collector electrode, 27 ... cooling jacket, 29 ... refrigerant guide member, 13 ... fixed base for collector part, 23 ... first semi-fixed vacuum bellows, 30
... Second semi-fixed bellows.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tsuyoshi Kariya 1385-1 Shimoishigami, Otawara-shi, Tochigi Pref. Toshiba Nasu Electronic Tube Factory (56) References JP-A-4-368752 (JP, A) JP-A-2-86031 (JP, A) JP-A-2-65032 (JP, A) JP-A-1-187736 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01J 25 / 00

Claims (1)

(57) [Claims] 1. A gyrotron oscillation tube main body, a magnetic field device to which the high-frequency operation portion of the oscillation tube main body is mounted, a high-frequency operation portion fixing base for fixing the high-frequency operation portion of the oscillation tube main body, and the oscillation tube main body A cooling jacket provided to cool the collector electrode, a refrigerant guide member connected to the cooling jacket to guide the refrigerant, and a collector part fixing frame to which the collector electrode, the cooling jacket, and the refrigerant guide member are fixed. In the gyrotron device provided, a first semi-fixed vacuum bellows is provided between the high-frequency operation section of the oscillation tube main body and the collector electrode, and a second semi-fixed vacuum bellows is provided between the cooling jacket and the collector section fixing base. A gyrotron device comprising a bellows.