JPH0750209A - Superconducting magnet device - Google Patents

Abstract

PURPOSE:To make a superconducting magnet device in a very compact size even in the case where unit superconducting magnets are connected in either of series connection and parallel connection. CONSTITUTION:A superconducting magnet device is constituted of a plurality of hollow cylindrical base bodies 21, 22 and 23, whose surfaces at least consist of an electrically insulating material, whose diameters are different from one another and which are coaxially arranged multiply, a plurality of superconducting conductors 13, which are closely adhered on the respective peripheral surfaces of these base bodies 21 to 23 and are spirally provided, and superconducting shortcircuit conductors for these short-circuiting conductors 13 in a series manner or a parallel manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superconducting magnet device constructed by connecting a plurality of unit superconducting magnets in series or in parallel.

[0002]

2. Description of the Related Art A superconducting magnet device utilizing a superconducting phenomenon is expected to be applied to various fields. Such a superconducting magnet device is often used by connecting a plurality of unit superconducting magnets in series or in parallel.

When a plurality of unit superconducting magnets are used in combination, the size of the unit superconducting magnet is generally combined as the whole superconducting magnet device, and there is a drawback that the superconducting magnet device becomes large.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the situation that the size of a superconducting magnet device becomes large when a plurality of unit superconducting magnets are used in combination as described above. The point is to provide a small superconducting magnet device.

[0005]

In order to achieve the above object, a superconducting magnet device according to a first aspect of the present invention has at least a surface made of an electrically insulating material, each of which has a different diameter and is coaxially and multiply arranged. The first and second hollow cylindrical substrates, the first superconducting conductor spirally provided in close contact with the peripheral surface of the first hollow cylindrical substrate, and the peripheral surface of the second hollow cylindrical substrate. A second superconducting conductor provided in a spiral shape that closely adheres to the spiral direction of the first superconducting conductor and moves in a direction opposite to the spiral traveling direction, and a short-circuit conductor that short-circuits the first and second superconducting conductors in series. It is composed of and.

Further, in a superconducting magnet device according to a second aspect of the present invention, at least the surface is made of an electrically insulating material, and a plurality of hollow cylindrical substrates having different diameters and arranged coaxially in multiple layers, and the hollow cylindrical bodies. It is characterized in that it is composed of a plurality of superconducting conductors provided in a spiral shape so as to be in close contact with respective peripheral surfaces of the substrate, and a superconducting short-circuit conductor for short-circuiting these superconducting conductors in series or in parallel.

[0007]

According to the superconducting magnet device of the first aspect of the present invention configured as described above, since a plurality of unit superconducting magnets are multiply arranged, the external appearance of the tubular base body is the largest. It is possible to construct an extremely compact structure by accommodating another tubular substrate inside. Further, since the spiral directions of the first and second adjacent superconducting conductors are wound in opposite directions when they are connected in series, the electromagnetic force generated in the superconducting conductors is generated between the first and second superconducting conductors. Since they can cancel each other, the heat generation of the superconducting conductor can be suppressed to an extremely small level.

Further, according to the superconducting magnet device of the second aspect of the present invention configured as described above, a plurality of unit superconducting magnets are multiply arranged even when the unit superconducting magnets are connected either in series or in parallel. Therefore, the external appearance can be extremely compact by accommodating another tubular base inside the tubular base having the largest diameter.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the superconducting magnet device of the present invention will be described below with reference to the drawings.

The superconducting magnet device of the present invention is a device for constructing a superconducting magnet device by connecting a plurality of unit superconducting magnets in series or in parallel, and the details of the constitution of the unit magnet will be described later, but basically. A superconducting conductor is spirally adhered around a hollow cylindrical substrate.

The embodiment shown in FIG. 1 is an example of constructing a superconducting magnet device using three unit magnets, and three unit magnets 21, 22, 23 having different diameters for large, medium and small respectively.
Are arranged coaxially in a non-contact state, and both ends of these unit magnets 21, 22, 23 are fixed by end plates 25. In addition, each unit magnet has a superconducting conductor 1
3 are closely attached in a spiral shape.

As shown in FIGS. 2A and 2B, the end plate 25 has three grooves 26 into which the ends of the unit magnets 21 to 23 can be fitted on one surface of a disk-shaped member. , 27, 28 are formed coaxially. To short-circuit the unit magnets 21 to 23 using this end plate 25, for example, the following 2
One configuration is suitable.

First, the end plate 25 itself is formed of a superconducting conductor.

Secondly, as shown in the drawing, each groove 26 to 2 is formed.
8 is a configuration in which short-circuit portions 29, 30, 31 made of superconducting conductors are provided on the surfaces of the unit magnets that contact the respective superconducting conductors 13. These short-circuited portions 29 to 31 are, for example, the groove 2
The superconducting conductor layers 6 to 28 are provided, and these short-circuit portions 29 to 31 may be short-circuited by an appropriate method.

With this structure, the superconducting conductors 13 can be easily connected in parallel, so that the current capacity thereof can be increased as compared with that of one unit magnet. As a result, it is possible to provide a superconducting magnet device that can generate a high magnetic field. Moreover, in the above-described embodiment, the end plates 25 are attached to both ends of each unit magnet 21 to 23.
Since the superconducting conductors 13 formed on each of the unit magnets 21 to 23 can be connected in parallel by simply fitting them to each other, the manufacturability is also good. In particular, when the superconducting conductor 13 is composed of a superconducting conductor layer formed by a thin film forming method as described later, the above short-circuiting method is effective.

It is also possible to connect the superconducting conductors 13 in series by devising a method of connecting the short-circuited portions 29 to 31. The following configuration is effective for such a series connection. That is, the unit magnets are multiply arranged so that the superconducting conductors 13 connected in series form a spiral such that they travel in opposite directions. With such a configuration, it is possible to obtain the excellent action and effect that the influences of the magnetic fields generated by the unit magnets can be canceled each other.

Next, the embodiment shown in FIG. 3 shows another embodiment of the superconducting magnet device of the present invention. In FIG. 3, the connection of each superconducting conductor 13 of each unit magnet 21 to 23 is as follows. The outer peripheral ends of the unit magnets 21 to 23 are connected by a lead wire 35 made of a superconducting conductor. When connecting with the lead wire 35 as described above, it is not necessary to manufacture the end plate 25 as shown in FIG.

An example of the structure of a unit magnet used in the superconducting magnet device of the present invention will be described below.

FIG. 4 shows the appearance of the unit magnet. The unit magnet 11 is formed on the outer peripheral surface (outer surface) of the hollow cylindrical substrate 12 in a spiral shape so as to advance in the axial direction of the substrate 12. The superconducting conductor layer 13 is formed. The hollow cylindrical substrate 12 is made of, for example, an insulator having a relatively high strength such as reinforced plastic or ceramics, or a hollow cylindrical outer surface of stainless steel coated with an insulating layer such as ceramics or polyvinyl formal resin (PVF). It is formed of things.

The superconducting conductor 13 is made of NbN, NbC, Nb3 Ge on the upper surface of the hollow cylindrical substrate 12 thus formed.
The superconducting conductors such as the above are formed by insulating the superconducting conductors of adjacent spirals by a thin film forming method such as vapor deposition. Since this superconducting conductor layer 13 is spirally vapor-deposited, it has the same function as if the conductor was wound in a coil shape, and the base 12 and the superconducting conductor layer 1 are provided.
Since 3 and 3 are in close contact with each other firmly, the restraining force of the conductor can be greatly improved as compared with the conventional wire wound magnet manufactured by winding the conductor. Therefore, even when a high magnetic field is generated, the superconducting conductor layer 13 and the base 1
No relative movement (vibration) or the like with respect to 2 is caused and a quench due to this is not caused. As a result, the superconducting conductor can be stably maintained, and a highly reliable superconducting magnet device can be provided.

FIGS. 5 and 6 show another example of the configuration of the unit magnet used in the superconducting magnet device of the present invention.

The unit magnet 15 in this constitutional example is constituted by forming a hollow cylindrical substrate 16 on the outer peripheral surface (outer surface) of an insulating cylinder 17 to form a stabilizing copper layer 18. The stabilizing copper layer 18 is formed by providing a spiral slit 19 for insulation on a copper layer formed by a thin film forming method such as a vapor deposition method on the outer peripheral surface of the insulating cylinder 17. The superconducting conductor layer 13 is integrally and closely attached to the surface of the stabilized copper layer 18 so as to be attached to the stabilized copper layer 18.

The unit magnet 15 is thus stabilized with the copper layer 18
With this structure, it is possible to improve the soundness of the superconducting magnet device in the event that the superconducting conductor layer 13 is quenched (normal conduction transition).

In each of the above embodiments, the superconducting conductor layer 13 is formed on the outer peripheral surface (outer surface) of the hollow cylindrical substrate. However, for example, the superconducting conductor layer 13 receives an outward force. In that case, the superconducting conductor layer 13 may be formed on the inner peripheral surface (inner surface) of the hollow cylindrical substrate, and the structure of the unit magnet is not limited to the above embodiment. .

In addition, the above-described embodiment can be variously modified and implemented without departing from the scope of the present invention.

[0026]

As described in detail above, the superconducting magnet device of the present invention can be constructed extremely compactly when unit superconducting magnets are connected either in series or in parallel.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a superconducting magnet device of the present invention.

FIG. 2 is a plan view of an end plate used in the superconducting magnet device of the present invention.

FIG. 3 is a perspective view showing another embodiment of the superconducting magnet device of the present invention.

FIG. 4 is a perspective view showing a configuration example of a unit magnet used in the superconducting magnet device of the present invention.

FIG. 5 is a perspective view for explaining a configuration example of a unit magnet used in the superconducting magnet device of the present invention.

FIG. 6 is a perspective view showing a configuration example of a unit magnet used in the superconducting magnet device of the present invention.

[Explanation of symbols]

 11 unit magnet 12 hollow cylindrical substrate 13 superconducting conductor (superconducting conductor layer) 15 unit magnet 16 hollow cylindrical substrate 17 insulating cylinder 18 stabilizing copper layer 19 slit 21 unit magnet 22 unit magnet 23 unit magnet 25 end plate 26 groove 27 groove 28 groove 29 short circuit part 30 short circuit part 31 short circuit part 35 lead wire

Claims (3)

[Claims] 1. A first and a second hollow cylindrical base body, at least the surface of which is made of an electrically insulating material, having different diameters and coaxially arranged in multiple layers, and a peripheral surface of the first hollow cylindrical base body. The first superconducting conductor that is closely attached in a spiral shape and the first superconducting conductor that is closely attached to the peripheral surface of the second hollow cylindrical substrate
Of a superconducting conductor, the second superconducting conductor is provided in a spiral shape that travels in a direction opposite to the spiral traveling direction, and a short-circuit conductor that short-circuits the first and second superconducting conductors in series. A superconducting magnet device. 2. A plurality of hollow cylindrical bases, at least the surface of which is made of an electrically insulating material, each having a different diameter and coaxially arranged in multiple layers, and a spiral shape in close contact with each peripheral surface of the hollow cylindrical bases. 2. A superconducting magnet device, comprising: a plurality of superconducting conductors provided in the superconducting conductor; and a superconducting short-circuit conductor that short-circuits these superconducting conductors in series or in parallel. 3. The hollow cylindrical substrate is made of reinforced plastic or ceramics.
Alternatively, the superconducting magnet device according to claim 2.