JPH09199296A - Electro-orbit correction electromagnet - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To reduce the installation space of an electromagnet for correcting an electron orbit. SOLUTION: The insulating layers 24 and 25 provided on one side surface and the other side surface of the vacuum chamber 12, and the insulating layer 24 formed on the surface of the insulating layers 24 and 25 in a substantially spiral shape by a thin metal plate.
4, 25 and a pair of coils 26 and 27 facing each other with the vacuum chamber 12 sandwiched therebetween, eliminating the need for a coil support and making the coils 26 and 27 into a flat spiral shape for correcting an electron orbit in a small space. It was possible to install an electromagnet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electron orbit correcting electromagnet.

[0002]

2. Description of the Related Art When an electron moving at a speed close to the speed of light is bent in its traveling direction by a magnetic field or an electric field, it emits an electromagnetic wave (light) called radiation light in the tangential direction of the orbit of the electron.

FIG. 3 shows an example of the synchrotron radiation generating means, 1 is a linear accelerator (particle accelerator), and the linear accelerator 1 emits electrons (charged particles) e. And a straight tubular acceleration duct 3 having one end connected to the electron generator 2, and an electron e moving inside the acceleration duct 3.
And a high-frequency accelerating device 4 for accelerating the electrons e by applying a high frequency.

[0004] One end of a curved tubular deflection duct 5 is connected to the other end of the acceleration duct 3.
Is provided with a deflecting electromagnet 6 for bending the trajectory of the electron e moving inside.

Reference numeral 7 is a synchrotron (particle accelerator), and the synchrotron 7 has an endless duct (electron storage ring) 8 for forming a circular orbit for the electrons e. The other end of the deflection duct 5 is connected to a required portion of the duct 8.

The curved portion of the endless duct 8 is provided with a deflection electromagnet 9 for bending the trajectory of the electrons e moving inside the endless duct 8. Further, a required portion of the endless duct 8 is provided with a bending electromagnet 9.
A high-frequency accelerator 10 is provided for applying a high frequency to the electrons e moving inside the endless duct 8 to accelerate the electrons e.

Furthermore, the radiant light beam S emitted by bending the traveling direction of the electrons e moving at a speed close to the speed of light in the curved portion of the endless duct 8 at the required location is an endless duct. 8 is connected to one end of a straight circular beam channel 11 and the other end of the beam channel 11 is provided with an experimental apparatus X for conducting an experiment using the synchrotron radiation beam S. Has been.

When the synchrotron radiation beam S is emitted by the synchrotron radiation generating means shown in FIG. 3, the inside of the acceleration duct 3, the deflection duct 5, the endless duct 8, the beam channel 11 and the experimental apparatus X is in an ultrahigh vacuum state. After the pressure is reduced to a state in which electrons e can move at a speed close to the speed of light, the electron generator 2
To emit electrons e.

The electrons e emitted from the electron generator 2 are
The beam is accelerated by the high-frequency accelerator 4, and further enters the endless duct 8 by being bent by the bending electromagnet 6.

The electron e incident on the endless duct 8 is bent by the bending electromagnet 9 at each curved portion and is accelerated by the high frequency accelerating device 10, whereby a radiant light beam S is emitted from the electron e.

The radiant light beam S emitted at the curved portion of the endless duct 8 at a predetermined position is provided with a beam channel 11.
It enters into the experimental apparatus X via.

At a predetermined position of the endless duct 8 constituting the synchrotron 7, a magnetic field is applied to the electrons e traveling inside the endless duct 8 and the trajectory of the electrons e with respect to the cross section of the endless duct 8. An electron orbit correction electromagnet for correcting the position to an appropriate state is provided.

FIG. 4 shows an example of a conventional electro-orbit correcting electromagnet. This electron-orbit correcting electromagnet is one side surface (upper side surface) of a vacuum chamber 12 constituting an endless duct 8.
A coil support 15 having a substantially U-shaped cross section, which has one support portion 13 facing the other side and the other support portion 14 facing the other side surface (lower side surface), and a pair of air core structures formed in the same shape. And coils 16 and 17 of.

One coil 16 supports one side of the coil support 15 so that the air-core portion extends in the vertical direction and the winding end end 18 of the conductor forming the one coil 16 is located on the vacuum chamber 12 side. It is attached to the part 13,
The other coil 17 has a coil support 1 such that an air core portion extends in the vertical direction and a winding start end 19 of a conductor wire forming the other coil 17 is located on the vacuum chamber 12 side.
5 is attached to the other support portion 14.

A winding start end 20 of a conductor wire forming one coil 16 is connected to one terminal of a DC power supply device 22 via a switch 21, and a winding end end of a conductor wire forming the one coil 16 is connected. 18 is connected to the winding start end 19 of the conductor wire forming the other coil 17, and the winding end end 23 of the conductor wire forming the other coil 17 is connected to the other terminal of the DC power supply device 22. The pair of coils 16 and 17 is connected to the DC power supply device 22 in series.

Therefore, in the electron orbit correction electromagnet shown in FIG. 4, when the switch 21 is closed and a DC current is supplied from the DC power supply device 22 to the coils 16 and 17, a pair of coils 16 facing each other with the vacuum chamber 12 sandwiched therebetween is provided. , 17, a magnetic field is generated in a direction orthogonal to the orbit of the electrons e traveling inside the vacuum chamber 12, and the magnetic field causes the vacuum chamber 1 to move.
The trajectories of the electrons e traveling in the inside of 2 are bent, so that the trajectory positions of the electrons e with respect to the cross section of the vacuum chamber 12 forming the endless duct 8 are corrected to an appropriate state.

[0017]

However, in the electro-orbit correction electromagnet shown in FIG. 4, since the coils 16 and 17 having the air-core structure are located on both sides of the vacuum chamber 12 by the coil support 15, the vacuum chamber 12 has the following structure. It is necessary to form a space for installing the coil support 15 and the coils 16 and 17 having the air-core structure in the periphery, and in a small particle accelerator, the particle accelerator tends to become large as a whole. There was a problem.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide an electro-orbit correcting electromagnet capable of reducing the installation space.

[0019]

To achieve the above object, in an electron orbit correcting electromagnet of the present invention, an insulating layer provided on one side surface and the other side surface of a vacuum chamber, and a thin metal plate on the surface of the insulating layer. Is formed into a substantially spiral shape and faces each other with the insulating layer and the vacuum chamber interposed therebetween.
And a pair of coils.

In the electron orbit correcting electromagnet of the present invention, it is not necessary to install a coil support around the vacuum chamber, and the coil has a flat shape, so that the installation space for the electron orbit modifying electromagnet is extremely small.

[0021]

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

1 and 2 show an example of an embodiment of an electromagnet for correcting an electron orbit of the present invention, which is one side surface (upper side surface) of a vacuum chamber 12 constituting an endless duct 8 (see FIG. 3). Insulating layers 24 and 25 are integrally provided on the surface of the other side surface (lower side surface) facing this, respectively.

For the insulating layers 24 and 25, it is preferable to use a phenolic resin or an epoxy resin such as Bakelite, which has electrical insulation and thermal insulation.

On the surface (upper surface) of the insulating layer 24 provided on one side surface (upper side surface) of the vacuum chamber 12, a coil 26 formed in a flat spiral shape by a thin metal plate is fixed, and the vacuum chamber is formed. On the surface (lower surface) of the insulating layer 25 provided on the other side surface (lower surface) of the coil 12, a coil 27, which is similarly formed in a flat spiral shape by a thin metal plate, faces the coil 26 on the upper surface side. It is stuck in position.

For the coils 26 and 27, a thin metal plate such as a copper plate is punched into a coil shape and attached to the surfaces of the insulating layers 24 and 25, or a metal coating is formed on the entire surfaces of the insulating layers 24 and 25 by vacuum deposition or the like. After forming the above, it can be formed by a method of covering the portion to be left in a spiral shape and removing unnecessary portions with an acidic solution.

In this way, a pair of coils 26, which are opposed to each other with the vacuum chamber 12 interposed therebetween, with the insulating layers 24 and 25 interposed therebetween.
The winding start end of one coil 26 of 27 is connected to one terminal of a DC power supply device (not shown), and the winding end end of this one coil 26 is connected to the winding start end of the other coil 27. Further, the winding end of the conducting wire forming the other coil 27 is connected to the other terminal of the DC power supply device (not shown) described above, and the pair of coils 26, 2
7 is connected to the DC power supply device in series.

A pair of coils 26, 27 facing each other
Is attached to the vacuum chamber 12 via the insulating layers 24 and 25, so that when a DC current is passed from the DC power supply device to the coils 26 and 27 without short-circuiting between the windings of the coils 26 and 27, a vacuum is generated. Face each other with the chamber 12 in between
A magnetic field is generated between the pair of coils 26 and 27 in a direction orthogonal to the trajectory of the electron e traveling inside the vacuum chamber 12, and the orbit of the electron e traveling inside the vacuum chamber 12 is bent by the magnetic field. As a result, the orbital position of the electron e with respect to the cross section of the vacuum chamber 12 forming the endless duct 8 is corrected to an appropriate state.

The electron orbit correcting electromagnet of the present invention is not limited to the above-mentioned embodiment, and it goes without saying that various modifications can be made without departing from the scope of the present invention.

[0029]

As described above, in the electron orbit correcting electromagnet of the present invention, it is not necessary to provide a coil support, and the coil for generating a magnetic field is formed in a flat spiral shape. It is possible to install the electron orbit correction electromagnet in the space, and it is possible to achieve an excellent effect that the installation space can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of an embodiment of an electro-orbit correction electromagnet of the present invention.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is a system diagram showing an example of a radiation light generation device.

FIG. 4 is a sectional view showing an example of a conventional electro-orbit correction electromagnet.

[Explanation of symbols]

 12 vacuum chamber 24 insulating layer 25 insulating layer 26 coil 27 coil

Claims (1)

[Claims] 1. An insulating layer provided on one side surface and the other side surface of the vacuum chamber, and a pair formed in a substantially spiral shape by a thin metal plate on the surface of the insulating layer and facing each other with the insulating layer and the vacuum chamber sandwiched therebetween. An electromagnet for electron orbit correction, comprising: