JPS6032149B2 - nuclear fusion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a torus-type nuclear fusion device, and particularly to a protection device for a magnetic field coil in this fusion device.

As shown in the diagrams in FIGS. 1 and 2, a conventional nuclear fusion device has a central support c provided between a substrate a and a ceiling beam b, and a torus-shaped vacuum around this central support c. A container (also referred to as an insulated vacuum container) d and a plurality of poloidal magnetic field coils e for heating and controlling plasma are arranged horizontally,
A part of a plurality of toroidal magnetic field coils f for confining plasma around the vacuum vessel d and each poloidal magnetic field coil e is provided so as to be in contact with the center column c, and each of the toroidal magnetic field coils f is connected to each of a pair of supports. A pestle 9 is supported between the substrate a and the ceiling beam b by a bag, and the vacuum container d is
A plunket i is provided inside the chamber to exchange heat with the plasma h.

Therefore, deuterium or the like is stored in the vacuum container d, and current is supplied to the poloidal magnetic field coil e and the toroidal magnetic field coil f to convert the deuterium in the vacuum container d into plasma h. High-velocity neutral particles are irradiated into the vacuum container d to secondary heat the plasma h, and the thermal energy generated in the plasma h is heat exchanged with the coolant flowing in the plunket i, and the heat exchanged cooling is performed. Material can be removed from the device and used to drive a turbine, for example.

On the other hand, in the conventional nuclear fusion device shown in FIG. 3, each poloidal magnetic field coil e is provided outside each toroidal magnetic field coil f, and a spacer i is provided on the central column c where each poloidal magnetic field coil e is located. A part of the toroidal magnetic field coil f is brought into contact with the toroidal magnetic field coil f through the coil f, and this is the same as the embodiment described above.

As described above, in the conventional former nuclear fusion device described above, the poloidal magnetic field coil e is installed inside the toroidal magnetic field coil f, so electrically, the poloidal magnetic field coil e
Placing the toroidal magnetic field coil f and the toroidal magnetic field coil f in this nuclear fusion device improves plasma generation efficiency and makes it easier to excite the plasma h and control the position and shape of the plasma h. Assembly is also very difficult because the boroidal magnetic field coils (e) intersect with each other like a ``circle of wisdom''.

Therefore, like the latter nuclear fusion device shown in Figure 3,
In some cases, a poloidal magnetic field coil e is disposed outside the toroidal magnetic field coil f to strengthen the magnetic field of the poloidal magnetic field coil e, thereby facilitating assembly.

However, in the latter fusion device described above, a part of the poloidal magnetic field coil e may be sandwiched between the central column c and the toroidal magnetic field coil f, and furthermore,
A centripetal force toward the central support c side acts on this toroidal magnetic field coil f due to its own electromagnetic force, and furthermore, as the size of the nuclear fusion device increases, this centripetal force ranges from about several tons to about several hundred thousand tons. Since the stress (load) can be reached, there are problems such as the need for a mechanically strong structure.

On the other hand, each toroidal magnetic field coil f of the latter fusion device
When power is supplied, due to the interaction of the poloidal magnetic field coil e, a toppling force is generated that tries to topple the toroidal magnetic field coil f due to stress in a plane perpendicular to the donut core axis o of the donut-shaped vacuum container d. Therefore, there are difficulties in terms of strength, such as having to hold it so that it does not collapse.

In order to solve the above-mentioned difficulties, the present invention provides a central column in the center of a donut-shaped vacuum container, and a part of each toroidal magnetic field coil is provided in contact with the outer periphery of this central column. A circumferential groove is provided in the upper center column at a position that does not touch the magnetic field coil, and a part of the poloidal magnetic field coil is sunk into this circumferential groove, so that the centripetal force of each toroidal magnetic field coil is supported by the center column. The present invention also provides a nuclear fusion device that is capable of protecting the poloidal magnetic field coil from the huge electromagnetic force caused by the centripetal force.

Hereinafter, the present invention will be explained with reference to the illustrated embodiments. Fourth
In the figure, reference numeral 1 denotes a fan-flat substrate, and this substrate 1
A ceiling beam 2 is installed horizontally above the substrate 1, and a center support 3 is provided between the substrate 1 and the ceiling beam 2.

Further, around this central column 3, a torus-shaped vacuum vessel 4 and a plurality of poloidal magnetic field coils 6 for heating and controlling the direction of plasma are arranged horizontally. such that the toroidal magnetic field coil 6 is located outside each of the above-mentioned poloidal magnetic field coils 5,
Furthermore, a portion thereof is provided in contact with the center support 3. Furthermore, each of the toroidal magnetic field coils 6 is provided with a pair of branches 7a and 7b located between the substrate 1 and the ceiling beam 2, and each of the branches 7a and 7b is connected to each of the branches 7a and 7b. The toroidal magnetic field coil 6 is supported so as not to fall. Furthermore, in the position where the toroidal magnetic field coils 6 of the center column 3 do not contact each other, there is an upper part.
A lower pair of circumferential grooves 8 are provided, and a portion of each of the poloidal magnetic field coils 5' is sunk into each of the circumferential grooves 8. On the other hand, a plunket 9 is provided in the vacuum vessel 4 so as to be able to exchange heat with a plasma 10 made of, for example, deuterium.

Therefore, "deuterium or tritium is contained in the vacuum container 4, and on the other hand, the poroidal magnetic field coils 5, 5'
By supplying current to the toroidal magnetic field coil 6, deuterium, etc. in the vacuum vessel 4 is converted into the plasma 10', and high-speed neutral particles are irradiated into the vacuum vessel 4 to transform the plasma 10 into a secondary form. The plasma 10 is heated, and the thermal energy generated in the plasma 10 can be heat exchanged with the coolant flowing inside the plunket 9.

On the other hand, when a current flows through the toroidal magnetic field coil 6,
Since each of the poloidal magnetic field coils 5' is sunk in each circumferential groove 8, the centripetal force of the toroidal magnetic field coil 6 is applied to the center of the toroidal magnetic field coil 6 without applying stress due to the centripetal force to each poloidal magnetic field coil 5' The side walls of the pillars 3 are pressurized, and each of the above-mentioned poloidal magnetic field coils 5
′ is protected.

Next, the embodiment shown in FIGS. 5 and 6 is another embodiment of the present invention, in which the poloidal magnetic field coil 5 and the toroidal magnetic field coil 6 interact with each other during power supply. The toroidal magnetic field coil 6 is held so as not to collapse.

That is, in the above embodiment, large bulges 3a and 3b are formed at the upper and lower parts of the central support 3, and a plurality of radial key grooves 11 are provided in the large bulges 3a and 3b. Each branch 7a supporting each toroidal magnetic field coil 6 is engaged with the groove 11, thereby preventing the toroidal magnetic field coil 6 from collapsing during power supply, and is the same as the embodiment described above. It is the content. As described above, according to the present invention, the center column 3 is provided in the center of the donut-shaped vacuum container 4, and a portion of each toroidal magnetic field coil 6 is provided in contact with the outer periphery of the center column 3. A circumferential groove 8 is provided in the central column 3 at a position that does not contact each toroidal magnetic field coil 6, and a part of the poloidal magnetic field coil 5' is sunk in this circumferential groove 8, so that each toroidal magnetic field coil 6 has a huge It is possible to prevent the centripetal force due to electromagnetic force from having an adverse effect on the boloidal magnetic field coils 5', and to obtain a large degree of freedom in terms of the material strength of each poloidal magnetic field coil 5' itself.

[Brief explanation of the drawing]

1 to 3 are diagrams for explaining a subordinate nuclear fusion device, FIG. 4 is a sectional view diagrammatically showing a nuclear fusion device according to the present invention, and FIGS. 5 and 6 are It is each figure which shows the other Example of this invention. 1... Board, 2... Ceiling beam, 3... Center support, 4
...Vacuum container, 5,5' poloidal magnetic field coil, 6.
... Toroidal magnetic field coil, 7a, 7b ... Branch village, 8
... Circumferential groove, 9... Plunket, 10... Plasma. Tsuyoshi J Zuka 2 Elephants 3 Elephants Scroll 4 Elephants Ku Urushi Urushi 6

Claims (1)

[Claims] 1. A center column is provided in the center of a donut-shaped vacuum container, and a portion of each toroidal magnetic field coil is provided in contact with the outer periphery of the center column, and a portion of each toroidal magnetic field coil is provided at a position not in contact with each toroidal magnetic field coil. A nuclear fusion device characterized in that a circumferential groove is provided in the central column, and a part of a poloidal magnetic field coil is sunk in the circumferential groove. 2. Claim 1, characterized in that a plurality of key grooves are provided at the upper and lower parts of the center column, and each support rod supporting each toroidal magnetic field coil is engaged with each key groove.
Nuclear fusion device as described in section.