JP3060407B2 - Wiggler coil support member and superconducting wiggler device using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a wiggler coil support member for supporting a superconducting wiggler coil and a superconducting wiggler apparatus using the same.

[0002]

2. Description of the Related Art Conventionally, a superconducting wiggler apparatus includes a pair of yokes facing each other, winding frames respectively arranged on the opposing surfaces of the pair of yokes, a superconducting wiggler coil provided on the winding frames, and a superconducting wiggler coil. And a wiggler coil support member constituting a beam duct through which the beam passes at the center.

FIG. 3 is a perspective view mainly showing a wiggler coil support member used in a conventional superconducting wiggler apparatus. Referring to FIG. 3, an attractive force acts between superconducting wiggler coils (hereinafter, simply referred to as coils) 51 and 52, but an electron beam passes through a gap 54 of a wiggler coil supporting member 53 between the coils 51 and 52. The wiggler coil support member 53 has a double-supported beam structure.

Conventionally, stainless steel or the like has usually been used as the material of the wiggler coil support member 53. However, as the central magnetic field of the superconducting wiggler device increases, the attraction between the coils 51 and 52 also increases. To support this, the wiggler coil supporting member 53 requires a material of higher strength. Became.

Conventionally, such high-strength materials include a plate material 5 made of carbon fiber reinforced plastic (CFRP) or beryllium copper alloy (BeCu) 9 or the like, so that a beam passing through the center of the plate 5 is overlapped. A stacked structure in which the layers are stacked in a direction is considered.

Therefore, since the space 54 inside the wiggler coil support member 53 needs to be made to have an ultra-high vacuum in order to allow an electron beam to pass therethrough, the material of the wiggler coil support member 53 must be able to maintain airtightness with the outside. Must.

However, in the above-described laminated structure, a gap is easily formed between laminated materials, and it is difficult to maintain airtightness. A superconducting magnet of the type shown in FIG. 4 is an example of a conventional technique having such a laminated structure and maintaining the airtightness of a beam passing portion.

The superconducting magnet according to the prior art shown in FIG.
In order to secure a vacuum space inside a beam duct (a wiggler coil support member) 53 having a laminated structure, a pipe-shaped vacuum vessel 55 for a beam duct is used.

[0009]

However, an external pressure of about 1 atm acts on the vacuum vessel 55 for the beam duct shown in FIG. 4, and the thickness of the vacuum vessel 55 for the beam duct is increased to withstand the pressure. Therefore, it is difficult to secure a space for the beam duct 53.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wiggler coil supporting member capable of supporting a suction force acting between coils and securing a sufficient space in a beam duct portion in a superconducting wiggler device. is there.

[0011]

According to the present invention, in a wiggler coil supporting member for supporting a superconducting wiggler coil to face each other and forming a beam duct disposed between the facing superconducting wiggler coils, A laminated structure in which a plate-like high-strength material having a beam passage gap in the center is laminated in the beam direction, and a thin stainless steel which covers the outside of the laminated structure and realizes vacuum tightness of the beam duct. A wiggler coil support member characterized by the above is obtained.

According to the present invention, there is provided the wiggler coil supporting member, wherein the covering member is substantially formed of thin stainless steel.

According to the present invention, there is provided a superconducting wiggler device comprising: any one of the wiggler coil supporting members; and a pair of superconducting wiggler coils supported by the wiggler coil supporting member.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a superconducting wiggler device using a wiggler coil supporting member according to an embodiment of the present invention. Referring to FIG. 1, the superconducting wiggler device is
As in the prior art, the wiggler coil is supported by a wiggler coil support member 1 disposed between a pair of coils 51 and 52.

FIG. 2 is a cross-sectional view of the wiggler coil supporting member 1 of FIG. As shown in FIG. 2, the wiggler coil support member 1 according to the embodiment of the present invention is made of a high-strength material C.
A beam duct 53 formed in a laminated structure in which a plate material having a hole at the center such as FRP or BeCu is laminated by a beam passing method is covered with a covering member 3 made of thin stainless steel,
It has a structure that maintains airtightness. Note that a seal welding is applied to a connection portion of the covering member 3 made of stainless steel. An external pressure of about 1 atm acts on the stainless steel coating member 3. However, since the wiggler coil support member 1 inside supports the pressure, the stainless steel can be made of a very thin material.

[0017]

As described above, according to the present invention,
In a superconducting wiggler device, a wiggler coil supporting member capable of supporting a suction force acting between coils and securing a sufficient space in a beam duct portion, and a superconducting wiggler device using the same can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a wiggler coil support member according to an embodiment of the present invention.

FIG. 2 is a sectional view showing the wiggler coil support member 1 of FIG.

FIG. 3 is a view showing an example of a wiggler coil supporting member according to the related art.

FIG. 4 is a view showing another example of a wiggler coil supporting member according to the related art.

[Explanation of symbols]

 Reference Signs List 1 Wiggler coil support member 2 Space (gap) through which electron beam passes 3 Coating member 51, 52 Wiggler coil 53 Wiggler coil support member (beam duct) 55 Vacuum container for beam duct

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H05H 13/04 H05H 7/04

Claims (3)

(57) [Claims] 1. A wiggler coil supporting member which supports a superconducting wiggler coil so as to face each other and is arranged between said facing superconducting wiggler coils to constitute a beam duct, wherein said beam duct has a beam passing gap at a central portion. A wiggler coil supporting member, comprising: a laminated structure in which a high-strength material in a shape of a beam is laminated in a beam direction; and a covering member that covers the outside of the laminated structure and realizes vacuum tightness of the beam duct. 2. The wiggler coil supporting member according to claim 1, wherein said covering member is substantially made of thin stainless steel. 3. A superconducting wiggler device, comprising: the wiggler coil supporting member according to claim 1; and a pair of superconducting wiggler coils supported by the wiggler coil supporting member.