JPS597956B2 - Torus type fusion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a torus-type nuclear fusion device, and in particular, a toroidal coil formed by covering a coil conductor with an outer frame surrounds a vacuum vessel, and a plurality of toroidal coils are arranged at predetermined intervals in the circumferential direction of the torus. This invention relates to a torus-type nuclear fusion device.

A toroidal coil used in a nuclear fusion device generates an annular magnetic field to confine and maintain plasma within a vacuum vessel.As shown in Figure 1, a toroidal coil 1 with a circular longitudinal section surrounds the vacuum vessel. A plurality of them are arranged at predetermined intervals in the circumferential direction of the torus, and each of them is supported by a support 3 on the circumference.

Incidentally, when each toroidal coil 1 of this structure is energized, an electromagnetic force is generated that acts toward the center of the torus.

Therefore, in the longitudinal section of the toroidal coil 1, the second
As shown in the figure, a larger electromagnetic force 4 acts on the center side A of the torus than on the outside B of the torus, so the strength of the coil frame 2 on the center side A of the torus becomes severe.

However, in the past, the coil outer frame 2 was made of the same material on both the center side A and the outside B of the torus without taking the above points into consideration.

Therefore, if the stress in the coil outer frame 2 on the center side A of the torus becomes larger than that on the outer side B, the outer side B must also be made of a material commensurate with the stress vc on the torus center side A, which is not preferable. Ta.

The present invention has been made in view of the above-mentioned points, and its purpose is to reduce the stress applied to the outer frame on the center side of the torus by devising the outer frame of the coil without providing a special support member. The object of the present invention is to provide a torus-type nuclear fusion device that can sufficiently withstand extreme conditions.

The present invention achieves the intended purpose by using a material for the outer frame in the longitudinal section of the toroidal coil that has higher yield strength on the center side of the torus than on the outside.

The present invention will be described below based on embodiments shown in the drawings.

The same reference numerals will be used for the same items as in the past.

FIG. 3 shows an embodiment of the present invention.

Since its schematic configuration is almost the same as the conventional one, the explanation will be omitted here.

In the coil outer frame 2' in this embodiment shown in the figure, the material on the center side A of the torus is made of a material with higher yield strength than the material on the outside B of the torus, for example, the center side A of the torus is forged, and the outside B of the torus is rolled. Both are welded together at the attachment part of the coil support 3.

Furthermore, the coil outer frame 2' in this embodiment is thicker on the center side A of the torus than on the outside B of the torus.

With the configuration of this embodiment, as is clear from the distribution of electromagnetic force in FIG.
Since the coil outer frame 2' on the center side A of the torus is made of a material with high strength, the coil outer frame 2' can receive a considerable amount of that force, and even if a large electromagnetic force is applied, the coil outer frame 2' / There is no difference in the stress generated on the torus center side A and the torus outer side B. Therefore, the material of the coil outer frame 2' on the torus outer side B does not need to be the same material as that on the torus center side A, which is very rational. Moreover, since the wall thickness is thinner than that on the center side A of the torus, the toroidal coil 1 does not become large.

Although the toroidal coil having a circular cross section has been described as an example here, the present invention can of course be applied to a toroidal coil having a non-circular cross section such as a D-shape or a racetrack shape.

Furthermore, when making a toroidal coil superconducting, it is also possible to give that role to the coil container (liquid helium container), which is the outer frame.

According to the torus-type nuclear fusion device of the present invention explained above,
The material of the outer frame in the vertical section of the toroidal coil is made of a material with higher strength on the torus center side than the outside, so it can be attached to the outer frame on the torus center side of the toroidal coil without providing any special support member. It can also withstand stress caused by electromagnetic force and the like.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a conventional toroidal coil. FIG. 2 is a distribution diagram of electromagnetic force applied to the toroidal coil. FIG. 3 is a sectional view of a toroidal coil showing an embodiment of the present invention. 1... Troytal coil, 2,2'...
...Coil outer frame, 3...Support.

Claims (1)

[Claims] 1. A torus-shaped vacuum container that encloses plasma inside, and a plurality of toroidal coils that are configured by covering a coil conductor with an outer frame, surround the vacuum container, and are arranged at predetermined intervals in the circumferential direction of the torus. A torus-type nuclear fusion device, characterized in that the material of the outer frame in the longitudinal cross section of the toroidal coil is made of a material with a higher strength on the center side of the torus than on the outside.