JP2000298197A - Radiation mirror device and method for using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiation mirror device capable of reflecting electromagnetic waves in the infrared range without damaging a reflecting surface even if radiant beams of high brightness impinge thereon. SOLUTION: This device has a mirror main body 13 with a flat reflecting surface 14, and a groove 15 extending in a straight line on the reflecting surface 14 and deeply dented into the mirror main body 13 is formed in the mirror main body 13. The mirror main body 13 is disposed so that the center portion 18 of a radiant beam can diagonally impinge on the sidewall 16 of the groove 15 and the peripheral edge portion of the radiant beam S can diagonally impinge on the reflecting surface 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation mirror device and a method of using the same.

[0002]

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

FIG. 2 shows an example of a radiation light generating means, wherein 1 is a linear accelerator, which comprises an electron generator 2 for emitting electrons (charged particles) e, and one end having an electron. A straight tubular acceleration duct 3 connected to the generator 2;
A high-frequency accelerator 4 is provided to apply high frequency to the electrons e moving inside the acceleration duct 3 to accelerate the electrons e.

[0004] The other end of the acceleration duct 3 is connected to one end of a curved tubular deflecting duct 5.
A bending electromagnet 6 is provided to bend the trajectory of the electron e moving inside.

Reference numeral 7 denotes a synchrotron (electron storage ring). The synchrotron 7 has an endless duct 8 for forming a circular orbit for the electrons e. Is connected to the other end of the deflection duct 5.

The bending portion of the endless duct 8 is provided with a deflecting electromagnet 9 for bending the trajectory of the electron e moving inside the endless duct 8. A high-frequency accelerator 10 is provided for applying a high frequency to the electrons e moving inside and accelerating the electrons e.

[0007] Further, in a curved portion at a required portion of the endless duct 8, a radiation light beam S emitted by bending the traveling direction of the electron e moving at a speed close to the speed of light in the curved portion is provided with an endless beam. One end of a beam line 11 for guiding to the outside of the duct 8 is connected, and the other end of the beam line 11 is provided with an experimental device 12 for performing an experiment using the above-mentioned emitted light beam S.

When the radiation light beam S is emitted by the radiation light generating means shown in FIG. 2, the inside of the acceleration duct 3, the deflection duct 5, the endless duct 8, and the beam line 11 is reduced to an ultra-high vacuum state. After the electron e is moved at a speed close to the speed of light, the electron e is emitted from the electron generator 2.

The electrons e emitted from the electron generator 2 are:
The endless duct 8 is accelerated by the high-frequency accelerating device 4 and further bent by the bending electromagnet 6.
Incident on.

The electron e incident on the endless duct 8 is accelerated by the high-frequency accelerating device 10 and its trajectory is bent at each bending portion by the bending electromagnet 9, whereby the tangent of the electron e to the trajectory of the electron e is obtained. A radiation light beam S is emitted in the direction.

A radiation light beam S emitted from a predetermined curved portion of the endless duct 8 enters a test device 12 via a beam line 11.

The emitted light beam S is diffused light that spreads in the traveling direction with a light emitting point on the orbit of the electron e orbiting the endless duct 8.

The emitted light beam S contains an electromagnetic wave having a wavelength ranging from the infrared region to the X-ray region, and its wavelength distribution becomes shorter as approaching from the beam periphery to the center.

Conventionally, a radiated light beam S is reflected by a silicon carbide (SiO ₂ ) or silicon (Si) single crystal mirror.
The electromagnetic wave in the X-ray region included in the mirror was reflected, and the X-ray beam reflected from the mirror was used for experiments and the like. In recent years, the electromagnetic wave in the infrared region included in the emitted light beam S has been extracted. It is being considered for use.

When extracting electromagnetic waves in the infrared region,
For example, an electromagnetic wave in the infrared region included in the emitted light beam S is selectively reflected by using a mirror made of copper, and an electromagnetic wave in a short-wavelength X-ray region is transmitted.

[0016]

However, when the emitted light beam S has a high brightness, the X-rays incident on the copper mirror are not suitable.
If the energy density of the electromagnetic wave in the linear region is too high, the mirror reflection surface may be thermally deformed or the mirror may be damaged.

The present invention has been made in view of the above circumstances, and provides a radiation light mirror device and a method of using the radiation light mirror device capable of reflecting electromagnetic waves in the infrared region without dissolving the mirror even if a high-luminance radiation light beam is incident. It is intended to provide.

[0018]

According to a first aspect of the present invention, there is provided a synchrotron radiation mirror apparatus comprising a mirror body having a flat reflecting surface, wherein the mirror body includes:
A groove extending linearly on the reflecting surface and deeply recessed inside the mirror body is formed.

In the radiation mirror device according to the second aspect of the present invention, in addition to the configuration of the radiation mirror device according to the first aspect of the invention, a cooling medium flow path is provided inside the mirror body. I have.

In the method of using the radiation light mirror device according to the third aspect of the present invention, the central portion of the radiation light beam may be obliquely incident on the side wall of the groove and the peripheral portion of the radiation light beam may be obliquely incident on the reflection surface. The mirror body as shown.

In the radiation light mirror device according to the first aspect of the present invention, the electromagnetic wave at the central portion of the radiation light beam having a high energy density is received by the side wall of the groove to prevent the reflection surface from being damaged.

In the radiation mirror device according to the second aspect of the present invention, the cooling medium is circulated through the flow path to prevent the temperature of the mirror body from rising.

According to a third aspect of the present invention, in the method of using the radiation mirror device, the electromagnetic wave at the center of the radiation beam having a high energy density is obliquely received by the side wall of the groove to disperse the energy, and The region-side electromagnetic waves are reflected by the reflecting surface.

[0024]

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

FIG. 1 is a perspective view showing an example of an embodiment of a radiation light mirror device of the present invention. A mirror body 13 is made of a block of copper or the like.

One surface of the mirror body 13 is a flat reflecting surface 14, and the mirror body 13 is placed on the reflecting surface 14.
A groove 15 that is deeply recessed toward the inside is formed in a straight line, and the reflection surface 14 is divided into two by the groove 15.

The width of the groove 15 is small, and the width of the side wall 1 of the groove 15 is small.
The grooves 6 and 16 face each other in parallel, and the groove 15 has a substantially uniform width.

A flow path 17 is provided inside the mirror body 13, and both ends of the flow path 17 are open to the outside on a surface opposite to the reflection surface 14 of the mirror body 13, and are provided with water or the like. Of the cooling medium flows through the flow path 17.

Next, a method for using the above-mentioned radiation mirror device shown in FIG. 1 will be described.

When reflecting electromagnetic waves in the infrared region,
The central portion 18 of the emitted light beam in the X-ray region having a short wavelength is the groove 1
5 so that the central portion 18 of the emitted light beam is directed toward the center of the groove 15 and the optical axis of the emitted light beam S is inclined, for example, by about 5 degrees with respect to the plane of the side wall 16 so that the light beam 5 is obliquely incident on one of the side walls 16. The mirror body 13 is arranged.

As a result, the center portion 18 of the emitted light beam having the highest energy density enters the groove 15 and
Obliquely enters one of the side walls 16.

Since the incident area of the central portion 18 of the emitted light beam obliquely incident on the side wall 16 is enlarged as compared with the case of vertical incidence, the incident energy per unit area is reduced, and the temperature rise of the side wall 16 is moderated. Will be.

On the other hand, the electromagnetic wave 19 in the infrared region having a low energy density is obliquely incident on the reflecting surface 14 and is reflected.

The flow path 17 inside the mirror body 13 is previously determined.
By circulating a cooling medium such as water, the mirror body 13 can be cooled, and thermal deformation of the reflection surface 14 can be prevented.

The radiation mirror device and the method of using the same according to the present invention are not limited to the above-described embodiments, but various modifications can be made without departing from the scope of the present invention. is there.

[0036]

As described above, according to the radiation mirror device of the present invention and the method of using the same, the following various excellent effects can be obtained.

(1) In either the radiation mirror device according to the first aspect of the present invention or the method of using the radiation mirror device according to the third aspect of the present invention, the center of the radiation beam having a high energy density is used. By receiving the portion on the side wall of the deeply recessed groove, the electromagnetic wave in the infrared region can be selectively reflected without causing damage to the reflection surface.

(2) In the radiation mirror device according to the second aspect of the present invention, the cooling medium flowing through the flow path can prevent the reflective surface from being thermally deformed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of a radiation light mirror device according to the present invention.

FIG. 2 is a system diagram showing an example of a radiation light generating means.

[Explanation of symbols]

 13 Mirror body 14 Reflecting surface 15 Groove 16 Side wall 17 Flow path 18 Central part of emitted light beam S Radiated light beam

Claims (3)

[Claims] A radiation body comprising a mirror main body having a flat reflecting surface, wherein a groove extending linearly on the reflecting surface and deeply recessed into the mirror main body is formed in the mirror main body. Mirror device. 2. The synchrotron radiation mirror device according to claim 1, wherein a cooling medium flow path is provided inside the mirror body. 3. The mirror body according to claim 1, wherein the mirror main body is arranged such that a central portion of the radiation light beam obliquely enters the side wall of the groove and a peripheral portion of the radiation light beam obliquely enters the reflecting surface. A method for using the synchrotron radiation mirror device according to any one of the above.