JPS6244629B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a torus-shaped nuclear fusion device, and in particular,
The present invention relates to a torus-shaped fusion device suitable for those equipped with superconducting toroidal magnetic field coils.

Conventionally, the configuration of a superconducting toroidal magnetic field coil in a torus-shaped fusion device is such that it is housed in a helium container 2 and cooled by a coolant such as liquid helium or supercritical helium, as shown in FIG. Furthermore, as shown in FIG. 2, it is surrounded by a radiation shield 3 (cooled by liquid silicon) for shielding radiant heat, a vacuum container 4 for vacuum insulation, and a spacer 5.

As shown in FIG. 1, a plurality of superconducting toroidal magnetic field coils 1 configured as described above surround a toroidal plasma discharge tube 9 and are arranged at predetermined intervals in the toroidal direction. A central support 7 is placed at the center of the torus, an electromagnetic force support 6 is placed inside the torus of the superconducting toroidal magnetic field coil 1, and an electromagnetic force support 6 is placed between adjacent superconducting toroidal magnetic field coils 1 on the outer periphery. configured.

In such a configuration, the electromagnetic force generated when the superconducting toroidal magnetic field coil 1 is excited is transmitted to the electromagnetic force support 6 at room temperature and the center column via the helium container 2, the spacer 5, and the vacuum container 4, respectively. Supported by 7. Therefore, the heat load flowing into the superconducting toroidal magnetic field coil 1 from the electromagnetic force support 6 and the center column 7 at room temperature increases as the superconducting toroidal magnetic field coil 1 becomes larger and the electromagnetic force becomes larger. , powerful refrigeration and liquefaction equipment will be required.

The present invention has been made in view of the above-mentioned points, and its purpose is to be able to suppress the heat load flowing into the superconducting toroidal magnetic field coil to a small level even when the superconducting toroidal magnetic field coil becomes large in size. To provide a torus-shaped fusion device that does not require

The present invention includes at least two adjacent superconducting toroidal magnetic field coils that surround a toroidal plasma discharge tube that houses plasma therein, are arranged at predetermined intervals in the direction of the torus, and are housed in a helium container. is housed in a single vacuum container, made into modules, and arranged radially around the center of the torus, and the vacuum container of each module is bonded and fixed to the vacuum container placed at the center of the torus to maintain vacuum. The electromagnetic force support located between the modularized parts is placed in a vacuum piping provided with a radiation shield to connect the adjacent single vacuum vessels. It was designed to achieve its intended purpose by being installed at a low temperature and maintained at a low temperature.

The present invention will be explained below based on the embodiments shown in the drawings. Incidentally, the same reference numerals are used for the same parts as in the past.

An embodiment of the present invention is shown in FIGS. 3 and 4. As shown in the figure, at least two adjacent superconducting toroidal magnetic field coils 1 housed in a helium vessel 2 are housed in a single vacuum vessel 24 to form a module. This module is arranged radially with respect to the vacuum container 14 arranged at the center of the torus,
By welding and joining the vacuum container 24 of the module and the vacuum container 14 placed at the center of the torus, an integrated vacuum container is formed and vacuum maintenance is possible. The inner circumferential side of the torus of the superconducting toroidal magnetic field coil 1 has a structure in which it is stuck to each other as shown in FIG.
At the same time, the outer peripheral side of the torus is surrounded by an electromagnetic force support 6 enclosed by a vacuum pipe 8.
are interconnected by. In this embodiment, as shown in FIG. 3, the superconducting toroidal magnetic field coil 1 and the helium container 2 configured in this manner are assembled into a vacuum container 2 in which two adjacent ones form a set.
This vacuum container 24 houses the superconducting toroidal magnetic field coil 1.
Similarly, they are arranged radially and joined to the vacuum vessel 14 to form a vacuum vessel integrated with the vacuum vessel 14, and the outer peripheral side of the torus is connected to each other by the vacuum vessel 8 containing the electromagnetic force support 6. . Radiation shields 3 are arranged on the inner surfaces of the vacuum container 24 and the vacuum piping 8, respectively, as shown in FIG.

In such a configuration, the electromagnetic force (central force) directed toward the center of the torus generated when the coil is excited is supported by the inner circumferential side of the torus of the helium container 2, which has a mutually tensioned structure, and the electromagnetic force (overturning force) The support is provided by an electromagnetic force support 6. This electromagnetic force support 6 includes a vacuum container 24,
Since it is surrounded by the vacuum piping 8 and the radiation shield 3, it is a low-temperature support system.

Therefore, even if the size of the superconducting toroidal magnetic field coil 1 is increased by adopting the configuration of this embodiment, the superconducting toroidal magnetic field coil 1 will be able to withstand the electromagnetic force (central force) directed toward the torus center generated during coil excitation.
Since it is directly supported between the helium containers 2 without any support at room temperature, it is possible to completely block out heat intrusion from the support, unlike the conventional room temperature support system. In addition, the electromagnetic force (falling force) is supported by the electromagnetic force support 6 as before, but
Since the vacuum container 24, the vacuum piping 8, and the radiation shield 3 provide a low-temperature support system, the intrusion heat from the electromagnetic force support 6 can be greatly reduced. Furthermore, by housing at least two adjacent superconducting toroidal magnetic field coils 1 in a single vacuum chamber 24 to form a module,
A large vacuum vessel containing all the superconducting toroidal magnetic field coils is no longer required, which is effective in making the device more compact, and the plasma discharge tube can be accessed directly from the atmosphere without passing through the vacuum vessel, allowing heating. There is also the effect that installation of the measurement port is easier.

According to the torus-shaped fusion device of the present invention described above, a plurality of plasma discharge tubes are arranged at predetermined intervals in the direction of the torus, surrounding a toroidal plasma discharge tube that stores plasma inside, and are housed in a helium container. At least two adjacent superconducting toroidal magnetic field coils are housed in a single vacuum container to form a module and arranged radially with respect to the center of the torus, and the vacuum container of each module is arranged at the center of the torus. An integrated vacuum container that can be bonded and fixed to a vacuum container to maintain a vacuum, and an electromagnetic force support located between the modular parts is provided to connect adjacent single vacuum containers. Since the superconducting toroidal magnetic field coil is installed in a vacuum pipe with a radiation shield and maintained at a low temperature, even if the superconducting toroidal magnetic field coil becomes larger, the electromagnetic force that is generated when the coil is excited and acts toward the center of the torus will be reduced. The torus can be supported directly between the helium containers, and the electromagnetic force acting on the outer circumference of the torus can be supported by an electromagnetic force support that is maintained at a low temperature, so the heat load flowing into it can be kept small. This method is very effective for this type of torus-shaped fusion device because it does not require a particularly powerful freezing and liquefaction device.

[Brief explanation of the drawing]

Figure 1 is a horizontal cross-sectional view showing a part of a conventional toroidal fusion device, Figure 2 is an enlarged cross-sectional view of the vicinity of the superconducting toroidal magnetic field coil in Figure 1, and Figure 3 is a cross-sectional view showing a portion of a conventional toroidal fusion device.
The figure is a horizontal sectional view showing a part of an embodiment of the torus-shaped nuclear fusion device of the present invention, and FIG. 4 is an exploded perspective view of the main part of FIG. 3. 1... Superconducting toroidal magnetic field coil, 2... Helium container, 3... Radiation shield, 6... Electromagnetic force support, 8... Vacuum piping, 9... Plasma discharge tube, 14, 24... Vacuum container.

Claims (1)

[Claims] 1. A toroidal plasma discharge tube that stores plasma therein, a plurality of superconducting toroidal magnetic field coils surrounding the plasma discharge tube, arranged at predetermined intervals in the direction of the torus, and housed in a helium container; In a toroidal fusion device comprising a superconducting toroidal magnetic field coil and an electromagnetic force support interposed between each torus direction on the outer circumferential side of the torus, at least two adjacent superconducting toroidal magnetic field coils are arranged in a single vacuum container. The vacuum container of each module is connected and fixed to the vacuum container arranged at the center of the torus to form an integrated vacuum container capable of maintaining vacuum, and , the electromagnetic force support located between the modularized parts is maintained at a low temperature by being installed in a vacuum piping provided with a radiation shield and provided to communicate a single vacuum container adjacent to each other. A torus-shaped fusion device characterized by: