JPS58100399A - Neutral particle incident device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a neutral particle injection device that performs additional heating of a nuclear fusion device, and in particular relates to the structure of an II series fin that connects an ion source and a neutralization cell. .

Fusion devices require additional heating of the plasma by a neutral particle injection device. A conventional neutral particle injection device has a schematic structure as shown in FIG. That is, the rare gas is ionized and turned into plasma by thermionic electrons of the fifmet/to 2 in the ion source Goods Maml. This plasma ion is extracted by the ion accelerating electric current #A3 and enters the neutralization cell 4. From this neutralization cell 4, ions are converted into neutral particles and enter the plasma 6 of the fusion experimental device main body 5. In addition, a plasma chamber gas station 7 is connected to the ion source goods master Ill, and a neutralization cell 4 is also connected.
A neutralized cell gas introduction section 8 is connected to the . In addition,
The neutralization cell 4 is housed in a vacuum tank 9, and the tip of this vacuum tank 9 is placed in the fusion tank 41iIti&iI!
It is continued. However, in a neutral particle injection device with such a configuration, the neutralization cell 4 and the ion source Pfusma! A magnetic shield is set up between i11 and Pukuzma 6 in the experimental apparatus main body 5. Due to the leakage magnetic field 1G generated by the Pukuzuma 6 inside the main body 5 of the experimental device, the particles are destroyed in the neutralization top 4 under the influence of 1iAJa. Like-garu.

In order to prevent the influence of this a-, in the conventional neutral particle injection device, as shown in Fig.
Set up a m air shield 11, and use the surroundings of the nine ion source Gufusumafu l [C! An air shield 13 is provided. This magnetic shield 11.11 prevents the influence of the leakage magnetic field 10, and the neutral particles are directed straight to the fusion experimental device main body 5 as shown by the arrow 13.
is incident on the

Figure s3 shows the upper ml magnetic shield 11. l! This shows the I# thin structure. The a-air shield 11 has a double structure in which a magnetic shield 15 with high magnetic permeability is disposed inside a magnetic shield 14 with a normal magnetic permeability, and the magnetic shield 12 also has a dfi shield 16 with a normal magnetic permeability. It has a double steel structure with a magnetic shield 17 of high permeability placed inside.

These magnetic shields 14.16 with normal magnetic permeability and magnetic shields 15.17 with high magnetic permeability are secured by bolts to the connecting flange 18, and to the east this connecting flange 1g is bolted to the empty tank 7 flange 1GK. #It is Hi. In addition, an ion source valve 20 is disposed inside the magnetic shield 150 with a t44iIA rate, supported by a valve stand 21, and this valve stand 21 is connected to a non-magnetic 822
It is attached to. This is because the valve stand 21 is non-magnetic.
The mounting part is also non-magnetic and has no particular meaning.

By the way, when the magnetic shield with normal magnetic permeability and the magnetic shield with high magnetic permeability come into contact, for example, if the connecting flange 18 is made of one sheet of the same material, the magnetic shields 14, 18, 1@, 17 - They come into contact with each other at the surface of the connecting flange 18, and the one with A4 magnetic permeability and the one with normal magnetic permeability become one body with the connecting flange 18. For this reason, the magnetic fluxes interfere with each other at a rate of %/%, and the magnetic shield with high magnetic permeability 15.1
7 MJ buttons will be reduced.

Therefore, in this '14 embodiment, the ninth point is to prevent the above drawbacks.
The @ structure of the connection flange I8 is made of non-magnetic material 23 and magnetic material s24.
The #I magnetic part 22 has a complicated structure, and FIG. 4 shows a plan view of this part.

Since the flange 18 following 11 has such a structure, the external magnetic shield 15 connected to fA441 is connected to the magnetic shield 16 on the neutralization cell side through the connecting flange 18t. . In addition, 44 Jitei's magnetic seal li'
A magnetic part 24 is extended from the 16 and connected to a magnetic shield 17 made of high-4 magnetic wire on the neutralization cell side.

For this reason, the magnetic shield with normal magnetic permeability is 14.15 and +1
Since a non-magnetic material 23 is included in the threshold with the magnetic shield 15.17 with a magnetic permeability of %4, they are magnetically isolated from each other9, and there is no magnetic interference between the two, resulting in a magnetic shield with a high magnetic permeability. The performance of magnetic shields 1 and 17 is maintained.

δ, quantity continuous 58, non-magnetic material 22, 23, magnetic material s
The fs match of 24 is vague not only in terms of magnetic insulation but also mechanically.
In addition, since the connection between the ion source and the neutralization cell must be maintained in a vacuum, sufficient joining work such as welding, pressure welding, brazing, etc. is required. Is Figure 5 the highest? 1llIIK
These T-
The number 25 in the figure indicates the melting of the beet, and the non-magnetic material 23 and the magnetic part 24.
, #I! The fibers 22 are completely combined. This beat 26 is extremely thin and does not deteriorate the non-magnetic properties of the non-magnetic body 23 and the non-magnetic portion 28 at all.

In this way, it is thought that S welding using an electron beam S welding is the unique bonding method for joining the above-mentioned components, but as is well known, electron beam welding is performed in a vacuum. Since welding can only be performed in the vacuum container, there is a drawback that if the 18 m flange 18 described above does not fit into the vacuum vessel, it will be impossible to weld it together. In addition, the connection flange 18, the non-magnetic body 23, the magnetic s24, the non-magnetic part 2
A small threshold for complex shapes such as 2
When combining with [, this gap is wider than the width of the electron welding beam i, and the beam passes through this point, #Im! There is a drawback that it becomes boring depending on what you do. Furthermore,
Since the structure is complex, the welding process requires a large number of man-hours, and it also has the disadvantage of being extremely time-consuming and labor-intensive.

The object of the present invention is to provide a neutral particle injection device that eliminates the above-mentioned drawbacks, simplifies the structure of the connecting flange that connects the ion-side magnetic shield and the neutralization cell @magnetic shield, and reduces the appearance of ridges. It depends on providing.

In the present invention, a number of holes are formed around a window formed in the center of a connecting flange made of the same material, and a conductive AA bolt is inserted through the holes through a predetermined gap between the inner wall of the hole. Also, a magnetic shield with high magnetic permeability on the ion source side, a magnetic shield with high magnetic permeability on the neutralization cell side, and ff1L on both sides of the connection flange, and a magnetic shield with normal magnetic permeability on the ion source side. A magnetic shield of normal magnetic permeability on the neutralization cell side and t-,
! The above object is achieved by fastening bolts to both sides of the outer periphery of the hole of the I-connected flage.

An embodiment of the neutral particle injection device of the present invention will be described below with reference to FIGS.

Figure 6 shows *a technology 2 for connecting the magnetic shield for ions g* and the magnetic shield on the neutralization cell side, which is the main part of the present invention.
This is an example showing a hinge structure.

The high permeability magnetic shield 15 on the ion source side and the high permeability magnetic shield 17 on the neutralization cell side are connected to the connecting flange 1.
##! ##! I've been treated. The magnetic shield 14 of normal magnetic permeability on the ion source side and the magnetic shield 16 of normal magnetic permeability on the neutralization cell side are directly fastened to both sides of the outer periphery of the hole 27 of the connection flange 18 by bolts. 7gl is a plan view showing the structure of the connection flange 18, which is made of the same material as li! A plurality of holes 27 are provided on the circumference H of the center Khh window portion 26 of the connecting flange 18, and six holes 27 are provided in the holes.
The bolt 28 passes through it. Since the other configurations are the same as those of the conventional example, ``at'' will be omitted.

Figure 8 -g of the hole 27 and bolt 26 shown in Figure 6
This is a map of Cape. The bolt 28 has a magnetic shield 15 on both ends! Non-magnetic material 29.30 is attached to provide magnetic insulation between the I connection hook/ji 18 and the magnetic shield 17 and the connection flange 18, and the head of the bolt 28 is directly connected to the **m flange/ji. Please do not touch 18. Bolts 28 connect non-magnetic materials 29 and 30 to flange 18
Tighten the non-DLT material 30 and the connecting flange 18 on both sides of the
A parallel medium 7-gage 31 for maintaining a vacuum is inserted between the non-magnetic #31 and the connecting flange 18.

This parayoung 31 is inserted to maintain a vacuum between the ion #A@ and the intermediate cell holder. t, magnetic shield 1B and bolt 28 and magnetic shield 17 and bolt 28
A magnetic material 32 that does not create a gap is inserted between the bolt 28011 and the threshold between the magnetic seal port 1 and the magnetic shield 17 in order to establish magnetic continuity between the magnetic shield Is and the magnetic shield 17. are magnetically passed through each other through bolts 28.

According to the present embodiment, the high magnetic permeability magnetic shield 1
5 and high magnetic conductivity magnetic shield 17 are connected 7 langes 1B
Magnetic shield 14 with normal magnetic permeability and RC # bonded on both sides of
By bolting the magnetic shield 16 of normal magnetic permeability and the magnetic shield 16 of normal magnetic permeability directly in the direction of the connecting flange 18 ON, magnetic insulation between the magnetic shield 15.17 of high magnetic permeability and the magnetic shield 14.16 of normal magnetic permeability is achieved. Bolt 28 and hole 27
It is made of the same material as the connecting flange 18 and is made of the same material as the connecting flange 18.
This has the effect of significantly reducing the processing air a, reducing the labor and time involved in this part, and reducing the cost. T-W! The electron beam S* is not used to process the connecting joint 18, which has the effect of eliminating any troubles related to welding.

As described above, according to the neutral particle injection device of the present invention,
Hfl! Ion 5its magnetic shield and neutralization cell side magnetic shield! This makes it possible to simplify the structure of the WI thread and reduce the number of processing steps.

[Brief explanation of the drawing]

Figure 1 is a schematic configuration diagram of a conventional neutral particle injection device, Figure 2 is a schematic configuration diagram showing the case where the neutral particle injection device in Figure 1 is magnetically attached, and Figure 3 is Figure 2. A schematic cross-sectional view showing details IIA of the afA shield part shown in .Sea figure is a partial plan view of connection 7 Kunji shown in Figure 3, and MS figure is a state of the image part of connection 7 Kunji shown in Figure 744. 11 that showed!
The clear figure and Figure 6 show the configuration of the magnetic shield part that is included in the main part of the neutral particle incident #l- of the present invention. The plan view, Figure 8, is a WR side view showing the #thinness of the bolt portion connecting the magnetic shield t in Figure 6. l...Gufsuma meaning, 4...Neutralization cell, 5...Nuclear Sabakura Yoshim device body, 14, 15, 16.17...Magnetic shield, IS...Connection flange, 26.・Window 11
．． 27-...hole, 28...bolt. 1st mouth 2nd figure 3rd 4th 5th figure 3

Claims (1)

[Claims] 1. An ion source that emits ions and a neutralization cell that uses the ions as neutral particles are connected to a magnetic shield of normal magnetic permeability placed on the outside IIVC and a magnetic shield of a ^4 magnetic table placed on the inside. In the neutral particle injection device, the neutral particles are shielded by a double magnetic shield consisting of a The connecting tube located at the boundary between the ion source and the neutralization cell is made of the same material, and a double-sided hole is provided around the six-sided window in the center of the connecting tube. A fufu/zip is inserted into the chain hole through the inner surface of the hole and a predetermined air gap, and connects the magnetic shield with high magnetic permeability on the ion II side and the magnetic shield with high magnetic permeability on the neutralization cell side. Connect the normal magnetic permeability magnetic shield of the io7 source to the normal magnetic permeability magnetic shield of the neutralization cell side with the bolts directly to the iR part V of the -ml hole of the Ii bolt. A neutral particle injection device characterized by: