JPS62180934A - Gyrotron device - Google Patents

Abstract

PURPOSE:To prevent deterioration of an insulating oil heated by the electron gun of an oscillating tube so as to achieve a long time operations by forcing the insulating oil staying among a gyrotron oscillating tube, a socket and a cryostat to make convection. CONSTITUTION:Oil let plug 10 is provided on a socket 5, and a pipe 11 branched from let of an oil circulating pump 9 is connected to it. The insulating oil supplied from the pump 9 is introduced into the socket 5 via the pipe 11 and the oil inlet plug 10. Then the oil is forced to make convection along a path shown by an arrow mark in the figure and diffused into an oil tank 4. In such a gyrotron device, the heat generated by an electron gun 2 is carried into the oil tank 4 by forced convection of the insulating oil. And the heat is radiated from the external wall of the oil tank 4 to the outside together with heat from power supply devices 6. Thus, local temperature rise of the insulating oil staying around the electron gun 2 caused by heat from it may not take place and deterioration of the insulating oil and any damage of a cryostat 3 may be prevented so that a long time operations of the device can be secured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a gyrotron device that generates high-power millimeter-wave band electromagnetic waves.

[Technical background of the invention and its problems]

In recent years, methods of using electromagnetic waves to heat plasma in nuclear fusion reactors have been studied, and gyrotron devices have been developed to generate these electromagnetic waves. The gyrotron oscillation tube, which generates electromagnetic waves in the millimeter wave band, requires a magnetic field of several Tesla, so superconducting magnets are used. Therefore.

As shown in FIG. 2, a typical gyrotron device consists of a cryostat and an oil tank for cooling and storing a gyrotron oscillation tube and a superconducting magnet. That is, the gyrotron oscillation tube 1 is fixed to the cryostat 3, and the cryostat 3 is fixed to the oil tank 4, respectively, to constitute the entire apparatus. Inside the oil tank 4 is a device 6 that supplies power to the electron gun section 2 of the gyrotron oscillation tube. A socket 5 for connecting a power source and the electron gun 2t is installed. Note that the socket 5 is fixed to the oil tank 4 by a socket support plate 7.

The oil tank 4 is filled with insulating oil 8 to maintain electrical insulation between the TT source equipment, the socket 4, and the electron gun 2, and to cool them. Heat generated from the power equipment is radiated from the outer wall of the oil tank 4 through the entire insulating oil 8. In order to effectively remove this heat, the insulating oil 8 is forced to undergo convection by the oil circulation pump 9.

By the way, in such a device, the socket 4 and the cryostat 3 are arranged concentrically surrounding the electron gun 2 which serves as a heat source, and the insulating oil existing between these does not convect and is heated by the electron gun. As the insulating oil becomes lighter, it will cause a local temperature rise of the insulating oil as shown in A in the figure.
Please be careful.

If operated for a long time, there is a problem that the insulating oil will deteriorate and the cryostat will be damaged.

[Purpose of the invention]

This invention aims to improve the above-mentioned drawbacks.

The object of the present invention is to provide a complete gyrotron device having a structure that prevents deterioration of insulating oil heated by an electron gun of a gyrotron oscillation tube and enables long-term operation.

[Summary of the invention]

The present invention comprises a socket having an insulating oil inlet and a path for forced convection of the insulating oil, and a means for supplying the insulating oil to the socket, using nine oil tanks.

By forcing convection of the insulating oil around the electron gun, this gyrotron device completely prevents any local temperature rise in the insulating oil due to the heat generated by the electron gun, and enables long-term operation.

〔Effect of the invention〕

According to the present invention, the heat generated from the electron gun can be dissipated into the oil tank by the forced convection of the insulating oil, so a local temperature increase of the insulating oil around the electron gun does not occur. Thus, a gyrotron device capable of long-term operation can be constructed.

[Embodiments of the invention]

Examples of the present invention will be described in detail below. In addition.

The same reference numerals are given to the parts having the same configuration as those of the conventional device, and the explanation thereof will be omitted. FIG. 1 shows the structure of the gyrotron device of the present invention. The socket 5 is provided with an oil inlet 10 to which a pipe 11 branched from the outlet of the oil circulation pump 9 is connected. The insulating oil supplied from the oil circulation pump 9 is introduced into the socket 5 through the piping 11 and the oil inlet 10, and is introduced into the socket 5 as shown by the arrow in FIG.
Forced convection occurs along the path and the oil is dispersed into the oil tank 4. In the gyrotron device configured in this way.

The heat generated from the electron gun 2 is carried into the oil tank 4 by the insulating oil undergoing forced convection, and is radiated to the outside from the outer wall of the oil tank 4 together with the heat generated by the power supply equipment. Therefore, the heat generated from the electron gun does not cause a local temperature rise of the insulating oil around the electron gun, which prevents deterioration of the insulating oil and damage to the flywheel.The gyrotron can operate for a long time. Devices can be configured.

[Brief explanation of drawings]

Figure 1 is a purchasing diagram showing the gyrotron device of the present invention;
FIG. 2 is a block diagram showing a conventional gyrotron device. 1, Gyrotron oscillation tube γ, socket support plate 2,
1! , Sub-gun 8. Insulating oil 3, cryostat 9. Oil circulation pump 4, oil tank 1
0. Oil inlet 5, socket 11. Plumbing 6, power supply equipment agent Patent attorney, Noriyuki Noriyuki Yudo Takehana Kikuo Figure 2 -

Claims (2)

[Claims] (1) Connect the gyrotron oscillation tube to the cryostat that cools and houses the superconducting magnet that generates the magnetic field necessary for the gyrotron oscillation tube, and to the power supply that supplies power to the gyrotron oscillation tube. A gyrotron device consists of a socket for the gyrotron, and an oil tank filled with insulating oil to house the gyrotron oscillation tube, socket, and equipment that makes up the power supply, and to provide electrical insulation and cooling. A gyrotron device characterized by providing means for forced convection of insulating oil between an oscillation tube, a socket, and a cryostat. (2) The means for causing forced convection of the insulating oil is comprised of a socket having an oil inlet and a path for forced convection of the insulating oil, and an oil tank provided with means for supplying insulating oil to the socket. A gyrotron device according to claim 1.