JPS63218200A - Superconductive sor generation device - Google Patents

Abstract

PURPOSE:To optimize the electromagnet arrangement of an accumulation ring for miniaturizing and energy saving, by forming the electromagnet arrangement consisting of superconductive electromagnets in an accumulation ring having rotational symmetry in three phases and using a super conductive acceleration tube. CONSTITUTION:In an accumulation ring, the shape of the ring has rotational symmetry in three phases in relation to the center, while a septum electromagnet 10, a wiggler electromagnet 9 and a superconductive acceleration cavity 8 are arranged respectively in long linear space at three spots. By such a ring form and arrangement of constituent elements, a compact accumulation ring, in which necessary constituent elements are fully arranged without any needless/space, can be obtained. Further, since electronic energy is proportional to a product of a magnetic field made by a deflection electromagnet and an orbital radius, the orbital radius can be reduced while miniaturizing the accumlation ring by making the deflection electromagnet 7 superconductive and heightening the magnetic flield intensity.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an SOR generation device for supplying SOR to SOR utilization devices such as analysis, measurement, and processing.

[Conventional technology]

When electrons traveling at near the speed of light inside an electron storage ring have their orbits bent by a bending magnet, they generate powerful electromagnetic waves. This electromagnetic wave is called SOR, and its wavelength and intensity depend on the energy and current of the electrons, the radius of the ring,
Determined by factors such as the strength of the magnetic field.

SOR generators were originally experimental equipment for high-energy physics, but recently there has been a strong demand for compact SOR@777 for industrial use such as analysis, measurement, and processing.

In a conventional SOR device, a linear accelerator accelerates electrons, and the electrons enter a storage ring for acceleration and storage. ! In accumulating, the electrons are further accelerated to a final electron energy and then stored for a long time to generate SOR. SOR is a 0M ring that is emitted when the orbit of electrons is bent at each bending electromagnet.The bending electromagnet is used to bend the orbit of electrons and hold the electrons on the orbit of the ring. Quadrupole electromagnets are also used to focus electrons into orbits. The acceleration cavity is used to accelerate incident electrons to final electron energy and to accelerate electrons that have lost energy due to SOR emission to return them to their original energy. These electromagnets and accelerating cavities are all of the normally conducting type.

[Problem that the invention seeks to solve]

As mentioned above, since conventional SOR devices use a normally conducting linear accelerator, the accelerating electric field is limited by high frequency losses, and therefore the accelerating tube becomes long. In addition, since the storage ring's bending electromagnet is a normal conduction type, it is difficult to obtain a KN field in terms of cooling, energy efficiency, and size. The problem with the size is that the SOR device becomes large when the SOR device is larger than 0. Since the accelerating cavity of the storage ring is normally conductive, there is a problem that a high accelerating electric field cannot be obtained. In addition, since the electrons that entered the ring are accelerated to a higher energy, the degree of vacuum in the ring deteriorates during acceleration and electrons are lost.Therefore, it takes time for the electrons to accumulate to the final electron energy. There are drawbacks.

Note that conventional storage rings are for elementary particle research.
Electromagnetic description of the ring! (Lattice) is not optimal in that it is a dedicated ring for SOR generation.

The present invention has been made in view of the above points.
The purpose of this is to optimize the electromagnet arrangement of the storage ring from the perspective of a device dedicated to SOR generation, and to
The purpose of the present invention is to provide an SOR device that shortens the operating time required to provide a stable supply of R, and is compact and energy-saving.

[Means for solving problems]

In order to achieve the above object, the present invention includes a storage ring in which superconducting electromagnets are used as electromagnets, and the electromagnet arrangement is made 3-fold rotationally symmetric; and an injection linear accelerator using a superconducting accelerator tube as an accelerator tube. An SOR device is provided, characterized in that it is comprised of:

[Effect]

In FIG. 1, an electron beam emitted from an electron gun (1) is accelerated to stored electron energy by a linear accelerator composed of a superconducting accelerator tube (3). By making the accelerator tube superconducting, it is possible to supply high-power high-frequency waves, and the high accelerating electric field allows a short linear accelerator to sufficiently accelerate electrons to the stored electron energy. Electrons accelerated by the linear accelerator are incident on the storage ring. As shown in Figure 2, the storage ring has a septum electromagnet 0 that bends the incident electron beam and places it on the ring's electron orbit.
[At a shorter wavelength than the SOR obtained from the bending magnet (7) by sharply bending the D1 electrons in a short period,
Wiggler electromagnet (
9) According to the present invention, a superconducting accelerating cavity (8) is arranged to replenish the energy lost by emitting SOR while going around the ring to the electrons by the amount lost. The shape of the ring has three-fold rotational symmetry about the center, and a septum electromagnet, a wiggler electromagnet, and a superconducting acceleration cavity are arranged in three long linear spaces. With this ring shape and arrangement of components,
A compact storage ring can be obtained in which all necessary components are arranged and there is no unnecessary space. Furthermore, since the energy of an electron is proportional to the product of the magnetic field created by the bending electromagnet and the orbital radius, by making the bending electromagnet superconducting and increasing the magnetic field strength, the orbital radius can be reduced and the storage ring can be made smaller.

Next, the incident electron energy is I GeV and is equivalent to the stored electron energy. For this reason, high-strength SO
Since R is generated and gas molecules on the inner surface of the beam pipe are knocked out by this SOR, a high vacuum is quickly achieved. Furthermore, since the electromagnet system does not need to be varied over time and is operated steadily, the superconducting electromagnet operates in a stable state.

L Embodiment] The present invention will be described in detail below based on the embodiment shown in the drawings.

Figure 1 shows the entire superconducting SOR generator according to the present invention, in which 10 MeV electrons are injected into a linear accelerator from an electron gun (1), and the accumulated electrons in a ring are generated by a high accelerating electric field of 40 MV/m in the linear accelerator. Accelerated to energy. The linear accelerator is a superconducting acceleration tube with a length of 1.6 m (3) 1
It consists of six magnets and a quadrupole electromagnet (4) for electron focusing. Two accelerator tubes make up one unit, and a talistron (
2) One unit is placed. The accelerator tube is cooled by forced indirect cooling using liquid helium in order to simplify the Taliostat structure and facilitate operation and maintenance. Electrons accelerated by the linear accelerator are incident on the N multiplier. FIG. 2 shows a storage ring, in which the incident electron beam is bent by a septum electromagnet (0ω) and placed on the electron orbit of the ring, and is held above the electron beam orbit by a superconducting bending electromagnet (7). A quadrupole electromagnet (4) is used to focus the electrons. The ring has three-fold rotational symmetry with respect to the center, and a septum electromagnet Ol, a wiggler electromagnet (9), and a superconducting accelerating cavity (8) are arranged in three long linear space parts, respectively.

As shown in FIG. 1, SOR is supplied to the outside through an SOR extraction pipe (5) provided on the side of the bending electromagnet.

Note that the present invention is not limited to the above embodiments,
If the ring shape has three-fold rotational symmetry with respect to the center, and if an injection device such as a septum electromagnet, an accelerating cavity, and an insertion type light source such as a wiggler electromagnet can be placed in the three long-line spaces, then the configuration The arrangement of elements is not limited to the example shown in FIG.

In addition, other insertion type light sources such as an angerator may be used instead of the wiggler electromagnet, the wiggler electromagnet may be removed from the ring, and the accelerating cavity of the ring may be of a normal conducting type. Although the superconducting accelerator tube is cooled by forced indirect cooling using liquid helium, indirect cooling using natural convection or immersion cooling may be used, and supercritical pressure helium may be used instead of liquid helium as the coolant.

〔Effect of the invention〕

As explained above, according to the present invention, by using a superconducting accelerator tube, the length of the linear accelerator can be shortened, and by using a superconducting bending electromagnet, the storage ring can be made small. Since the arrangement of electromagnets is optimized for SOR generation, the entire device can be significantly downsized. In addition, since the incident electron energy to the storage ring is increased to the final stored electron energy, SOR is stably supplied in a short time, and there is no change in the electromagnet magnetic field and the high frequency power of the accelerating cavity. , control becomes easier.

As described above, the present invention has great effects on the industrial use of SOR.

[Brief explanation of the drawing]

FIG. 1 is an overall diagram showing an embodiment of a superconducting SOR generator according to the present invention, and FIG. 2 is a diagram showing a superconducting SOR generator according to the present invention.
FIG. 3 shows an example of a storage ring of a generator. l...electron gun, 2...klystron, 3...
・Superconducting accelerator tube, 4...quadrupole electromagnet, 5...S
OR extraction vibe, 6... Enemy shielding wall, 7... Superconducting bending electromagnet, 8... Superconducting accelerating cavity, 9...
Wiggler electromagnet, lO... septum electromagnet, 1
1... Kitzker electromagnet, 12... Incident electron beam, 13... Electron beam trajectory.

Claims (1)

[Claims] A superconducting electromagnet is used as an electromagnet, and the electromagnet is arranged in three ways.
A superconducting SOR generator comprising a storage ring with rotational symmetry and a linear accelerator using a superconducting accelerator tube as an accelerator tube.