JPH02220333A - Cyrotron device - Google Patents

Abstract

PURPOSE:To ensure improved performance with simplified device design by allowing easy and high-precision alignment of the center axis of a gyrotron oscillator tube and the magnetic axis of a superconducting magnet device without using a compensating coil. CONSTITUTION:When a support 44 removed, a superconducting magnet 2a is installed on a support 41 via a position adjusting mechanism 32. The support 44 is then secured on a support 42. When a flange 63 of a magnetic field detector 61 is engagingly fixed in a recess 47 of the support 44, the axial center line of a sensor supporting body 64 coincides with the center axis of a gyrotron oscillator tube 1 upon its installation. A magnetic field is generated by the superconducting magnet 2a, and the inclination and position of the magnet 2a is adjusted by means of the adjusting mechanism 32. By removing a prove 62, the oscillator tube 1 is secured on a support 31. Supplying oil 3 installing a blocking plate 58 completes assembly. Provision of the position adjusting mechanism 32 permits easy and high-precision alignment of the center axis and the magnetic axis without using a compensating coil.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a gyrotron device used for heating plasma in a nuclear fusion reactor.

(Prior Art) There are various means for heating the plasma of a nuclear fusion reactor, one of which is a high-frequency heating method using electron cyclotron resonance. Applying this method to plasma heating in fusion reactors requires an oscillation tube with a frequency in the millimeter wave band and high output. A gyrotron device that utilizes the principle of a cyclotron resonance maser is known as an oscillator tube that satisfies this requirement. A gyrotron device requires a magnetic field of several Tesla to generate electromagnetic waves in the millimeter wave band. For this reason, in a gyrotron device that generates electromagnetic waves in the millimeter wave band, a superconducting magnet device is generally used as a magnetic field application source.

FIG. 3 shows the main parts of a conventional gyrotron device incorporating a superconducting magnet device as a magnetic field application source. This gyrotron device is broadly divided into a gyrotron oscillation tube 1, a superconducting magnet device 2 that is arranged to fit into the gyrotron oscillation tube 1 and supports the gyrotron oscillation tube 1, and a superconducting magnet device 2. 2 and an oil tank 4 containing insulating oil 3 inside.
It is made up of.

The gyrotron oscillation tube 1 includes an electron gun 11 that generates an electron beam, a cavity resonator 12 that interacts the electron beam with a high-frequency electric field and converts it into high-frequency energy, and a cavity that captures the electron beam that has passed through the cavity resonator 12. Collector unit 13 that collects
and a window section 14 that outputs high frequency waves. The gyrotron oscillation tube 1 is fitted with the electron gun 11 side into the superconducting magnet device 2, and in this state is fixed to the superconducting magnet device 2 using a flange 15 provided on the outer surface of the peripheral wall of the cavity resonator 12. .

On the other hand, the superconducting magnet device 2 includes a cryostat 17 having an annular chamber 16 inside and having a cylindrical outer shape, and a cavity resonator 12 inside the cryostat 17.
Superconducting coils 18 and 19 are arranged at positions surrounding the electron gun 11 and superconducting coils 18 and 19 are arranged at positions surrounding the electron gun 11, and a correction superconducting coil 20 is arranged outside the superconducting coil 18, and a superconducting coil 20 is housed in the cryostat 17 and is used to cool each coil. The refrigerant 21 is provided. Then, the superconducting magnet device 2 is inserted into the oil tank 4 through a hole 22 provided in the earthen wall of the oil tank 4 with its lower half, for example, and in this state, the superconducting magnet device 2 is inserted into the oil tank 4 using a flange 23 provided on the outer surface of the peripheral wall of the cryostat 17. and is fixed to the oil tank 4.

However, the conventional gyrotron device configured as described above has the following problems. That is, in order for the gyrotron device to exhibit stable performance, it is necessary that the magnetic axis of the superconducting coil 18° 19 and the central axis of the gyrotron oscillation tube 1 be parallel to each other with high precision.

When manufacturing the gyrotron oscillation tube 1 and the superconducting magnet device 2, it is possible to manufacture the gyrotron oscillation tube 1 with high dimensional accuracy, but it is extremely difficult to manufacture the superconducting magnet device 2. Therefore, even if the two are assembled as designed after manufacturing, in many cases the gyrotron oscillation tube
The central axis of the superconducting magnet device 2 and the magnetic axis of the superconducting magnet device 2 are not parallel to each other. For this reason, in the conventional device, a correction superconducting coil 20 is provided, and this coil is used to align the above-mentioned magnetic axis and the central axis. Cavity resonator 12 from the position
It was difficult to align the magnetic axis with the central axis over the entire area up to the end of the magnetic field. Furthermore, since the correction superconducting coil 20 is provided, there is also the problem that the entire device becomes ml.

(Problem to be solved by the invention) As mentioned above, in conventional gyrotron devices.

Not only is it structurally difficult to make the central axis of the gyrotron oscillation tube and the magnetic axis of the superconducting magnet device parallel to each other, but it also complicates the entire structure.

Therefore, the present invention provides a gyrotron device that can easily and accurately set the central axis of a jarotron oscillation tube and the magnetic axis of a superconducting magnet device in parallel without using a correction coil. The purpose is to

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above objects, two gyrotron devices according to the present invention are provided with a pedestal that supports the gyrotron oscillation tube and the superconducting magnet device in common, and also have the above-mentioned features. A position adjustment mechanism is provided between the pedestal and the gyrotron oscillation tube or the superconducting magnet device to adjust the relative position between the central axis of the gyrotron oscillation tube and the magnetic axis of the superconducting magnet device.

(Function) With the above configuration, the central axis of the gyrotron oscillation tube and the magnetic axis of the superconducting magnet device can be raised by adopting the following assembly procedure without requiring a correction coil. Can be accurately parallelized. That is, assuming that a position adjustment mechanism is currently provided between the pedestal and the superconducting magnet device, during one assembly, the superconducting magnet device is first installed on the pedestal via the position adjustment mechanism. Next, instead of the gyrotron oscillation tube, the probe of the magnetic field detection device is temporarily fixed to the oscillation tube fixing part of the pedestal. The probe used includes a flange having the same dimensions as the flange for mounting on the gyrotron oscillation tube, and a rod-shaped sensor support extending in the axial direction from the flange. The sensor support is attached to the flange so that when the flange is fixed to the oscillation tube fixing part of the pedestal, its axis line coincides with the central axis of the gyrotron oscillation tube when the gyrotron oscillation tube is attached to the pedestal. It is set up against. A plurality of magnetic field sensors are arranged at equal intervals in the axial direction on the axis of the sensor support. therefore,
When the flange of the probe is fixed to the oscillation tube fixing part of the pedestal, all the magnetic field sensors installed on this probe are in the space surrounded by the superconducting magnet device, and when the gyrotron oscillation tube is attached to the pedestal, It will be located on the central axis of the oscillation tube. Here, the inclination and radial position of the superconducting magnet device are adjusted using a position adjustment mechanism so that the strength of the magnetic field detected by each magnetic field sensor becomes equal. In this way, the position conditions adjusted so that the radial (horizontal) components of the magnetic field strength detected by each magnetic field sensor are equal are precisely the magnetic axis of the superconducting magnet device and the axis of the sensor support. The condition is that the core wire, that is, the central axis of the gyrotron oscillation tube, is parallel to each other. Therefore, by removing the probe and then fixing the gyrotron oscillation tube to the oscillation tube fixing part of the mount, the center axis of the gyrotron oscillation tube and the magnetic axis of the superconducting magnet device can be assembled under conditions that are completely parallel. Become.

(Example) Examples will be described below with reference to two drawings.

FIG. 1 shows the main parts of a gyrotron device according to an embodiment of the present invention. In this figure, the same parts as in FIG. 3 are indicated by the same reference numerals. Therefore, detailed explanation of the two overlapping parts will be omitted.

This gyrotron device is largely different from conventional devices in that a pedestal 31 is provided above the oil tank 4a to commonly support the gyrotron oscillation tube 1 and the superconducting magnet device 2a, and the pedestal 31 and the superconducting magnet device 2a are The point is that a position adjustment mechanism 32 for adjusting the inclination and horizontal position of the superconducting magnet device 2a is provided between them.

In this example, the pedestal 31 includes a first pedestal element 41 that also serves as the upper wall of the oil tank 4a, and an outer peripheral edge of the upper end of the oil tank 4a.
a second frame element 42 extending cylindrically toward one side;
The second frame element 42 is arranged so as to close the upper end opening of the second frame element 42.
The third frame element 44 is fixed to the frame element 42 with screws 43. At the center of the first mount element 41.

A hole 45 is formed for inserting the lower half of the superconducting magnet device 2a into the oil tank 4a from above.

The diameter of this hole 45 is larger than the outer diameter of the superconducting magnet device 2a by a predetermined amount. Further, a hole 46 is formed in the center of the third mount element 44 for inserting the lower side of the gyrotron oscillation tube 1 (into 7! the slave gun side) from above.

A recess 47 for positioning the flange 15 provided on the gyrotron oscillation tube 1 with a spindle joint structure is formed on the upper surface at the peripheral edge of the hole 46. After the gyrotron oscillation tube 1 is inserted into the superconducting magnet device 2a with its lower side inserted through the hole 46.

It is positioned by fitting the flange 15 and the recess 47.

In this state, the flange 15 is attached to the third frame element 44 by the screw 48.
The tightening is fixed, thereby firmly fixing it to the frame 31.

On the other hand, the 1-position adjustment mechanism 32 is configured as follows.

That is, a supporting flange 51 is provided on the outer circumferential surface of the cryostat 17 in the superconducting magnet device 2a, and four screw holes 52 are provided in the flange 51, for example, at intervals of 90 degrees and directed in the vertical direction. (not shown), and screws 53 are inserted into these screw holes 52 from above so that their tips abut against the upper surface of the first frame element 41. 53 supports the weight of the superconducting magnet device 2a, and the position and inclination of the superconducting magnet device 2a in the height direction can be adjusted by varying the insertion amount. Also.

On the upper surface of the first frame element 41, at a position outside the flange 51, facing the outer circumferential surface of the flange 51, for example, four
In addition to providing two protrusions 54 (the two protrusions perpendicular to the plane of the paper are not shown), each protrusion 54 is provided with a screw hole 55 extending in the horizontal direction.

Screws 56 are installed in these screw holes 55 so that their tips come into contact with the outer peripheral surface of the flange 51, and by varying the amount of insertion of these screws 56, the radial position of the superconducting magnet device 2a can be adjusted. .

In FIG. 1, numeral 57 indicates a window portion used for adjusting the insertion amount of each screw 53 and 56 from the outside, and numeral 58 indicates a window portion 57.
This shows the occlusion plate that will eventually close the area.

With such a configuration, the central axis of the gyrotron oscillation tube 1 and the magnetic axis of the superconducting magnet device 2a can be aligned in a parallel state with high precision in a first-order manner.

That is, when assembling the second frame, the third frame element 44 is removed,
In this state, the superconducting magnet device 2a is installed on the first frame element 41 via the position adjustment mechanism 32, as shown in FIG. Next, the third gantry element 44 is fixed to the second gantry element 42 with screws 43.

Subsequently, the probe 62 of the magnetic field detection device 61 is temporarily fixed to the third frame element 44 instead of the gyrotron oscillation tube 1. The probe 62 used includes a flange 63 having the same dimensions as the mounting flange 15 provided on the gyrotron oscillation tube 1, and a rod-shaped sensor support 64 extending in the axial direction from the flange 63. . When the flange 63 of the sensor support 64 is fixed in the recess 47 of the third mount element 44 with a dowel structure, its axis line is aligned with the central axis of the gyrotron oscillation tube 1 when the gyrotron oscillation tube 1 is attached to the mount. is provided to the flange 63 in a matching relationship. A plurality of magnetic field sensors (not shown) are arranged on the axis of the sensor support 64 at equal intervals in the axial direction.

When the probe 62 is fixed to the third frame element 44 in this way, all the magnetic field sensors provided on the probe 62 can be operated in a space surrounded by the superconducting magnet device 2a, and the gyrotron oscillation tube 1 is attached to the frame 31. It will be located on the central axis of the oscillation tube 1 when installed.

Next, a magnetic field is generated by the superconducting magnet device 2a.

In this state, the position adjustment mechanism 32 is used to adjust the inclination and radial position of the superconducting magnet device 2a so that the strength of the magnetic field detected by each magnetic field sensor becomes equal. In this way, the positional conditions adjusted so that the radial (horizontal) components of the magnetic field strength detected by each magnetic field sensor are equal are the positional conditions between the magnetic axis of the superconducting magnet device 2a and the sensor support 64. The condition is that the axial center line, that is, the central axis of the gyrotron oscillation tube 1, is parallel to each other. Next, by removing the probe 62 and then fixing the gyrotron oscillation tube 1 to the pedestal 31 as shown in FIG. 1, the central axis of the gyrotron oscillation tube 1 and the magnetic axis of the superconducting magnet device 2a are completely aligned. They will be assembled under parallel conditions. Thereafter, the assembly is completed by housing the well 3 and installing the closing plate 58.

In this way, the gyrotron oscillation tube 1 and the superconducting magnet device 2a are commonly supported by the pedestal 31, and the pedestal 31
Since a position adjustment mechanism 32 is provided between the gyrotron oscillation tube 1 and the superconducting magnet device 2a, the relative position between the central axis of the gyrotron oscillation tube 1 and the magnetic axis of the superconducting magnet device 2a can be varied.
The above-described assembly method can be employed, and thereby the central axis and the magnetic axis can be set in parallel with each other easily and with high precision without requiring a correction coil.

Note that the present invention is not limited to the above embodiments.

That is, in the above embodiment, a position adjustment mechanism is provided between the pedestal and the superconducting magnet device.

A position adjustment mechanism may be provided between the pedestal and the gyrotron oscillation tube. In addition, in the embodiment described above, equivalent axis alignment is performed using a magnetic field detection device, but
Equivalent alignment can also be achieved using a charged particle beam. Further, the two-position adjustment mechanism is not limited to the structure of the embodiment, and may be a combination of wedge mechanisms, for example. Furthermore, the power necessary for alignment may be provided using a power source such as a motor.

[Effects of the Invention] As described above, according to the two inventions, the central axis of the gyrotron oscillation tube can be easily and precisely aligned with the magnetic axis of the superconducting magnet device without using a correction coil. This makes it possible to simplify the entire device and improve its performance. .

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing only the essential parts of a gyrotron device according to an embodiment of the present invention, FIG. 2 is a diagram for explaining the procedure for assembling the device, and FIG. 3 is a conventional FIG. 2 is a longitudinal cross-sectional view showing a gyrotron device. DESCRIPTION OF SYMBOLS 1... Gyrotron oscillation tube, 2a... Superconducting magnet device, 3... Oil, 4a... Oil tank, 11... Electron gun. 12... Cavity resonator, 13... Collector section, 14...
...Window, 15...Flange, 17...Cryostat. 18.19... Superconducting coil, 31... Frame, 32
...Position adjustment mechanism, 61...Magnetic field detection device, 62.
··probe. Applicant's agent Patent attorney Takehiko Suzue Figure 2 Figure 3

Claims (2)

[Claims] (1) In a gyrotron device comprising a gyrotron oscillation tube and a superconducting magnet device disposed in a fitting relationship with the gyrotron oscillation tube and applying a magnetic field necessary for oscillation, the gyrotron oscillation tube and the a pedestal that commonly supports the gyrotron oscillation tube or the superconducting magnet device; A gyrotron device comprising a position adjustment mechanism capable of adjusting a relative position. (2) The position adjustment mechanism includes an angle adjustment mechanism that can adjust the angle of the magnetic axis with respect to the central axis, and a radial position adjustment mechanism that can adjust the radial position of the magnetic axis with respect to the central axis. The gyrotron device according to claim 1, characterized in that: