JP2003151800A - Ultra-high luminance radiation light generation method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain, with a compact and small scale facility, an ultra-high luminance radiation light in which the number of photons is peak, with a Compton scattering system in which the radiation light of higher energy level than that of a braking radiation system and with the energy level capable of nuclear transformation for nuclear annihilation treatment of a radioactive waste. SOLUTION: This ultra-high luminance radiation light generation device comprises a photon storage cavity 10 and a second electron storage ring 20. A laser radiation of circular polarized light generated in a free electron laser 14 of the photon storage cavity 10 is stored in a first optical resonator 16, and is stored at a higher degree in a second optical resonator 18. Based on a special Compton scattering in which a rotation opposite to a rotation of the circular polarized light of the laser radiation is applied to a bunch of an electron beam stored in the second electron storage ring 20 whereby collision is done such that a product of both helicity values is a maximum negative value nearest to a theoretical value -1 in a mutually acting region, the ultra-high luminance radiation light which becomes peak with the predetermined energy level is generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for generating super-bright radiant light used as an irradiation light source for a nuclear reactor, which produces heat energy by causing nuclear fission by annihilation treatment of radioactive waste and irradiation of high energy photons. And equipment.

[0002]

2. Description of the Related Art γ-rays generated by reactions such as fission of radioactive nuclear materials such as uranium and plutonium are a kind of electromagnetic waves with short-wavelength radiation, and are used for medical treatment and disappearance of radioactive nuclear waste. It can be used for processing. As a method for generating γ-rays, a method using bremsstrahlung generated by applying an electron beam to a target material such as tungsten or tantalum is generally used. Gamma rays due to bremsstrahlung are nuclei--
It is decelerated by the electric field of the system formed by the electrons, and due to this deceleration, energy is changed to radiated light and generated.

In the generation of synchrotron radiation by bremsstrahlung, the energy of electrons is used for the kinetic energy, ionization energy, excitation energy of atoms, etc., and the energy used for bremsstrahlung is only a part, and the generation efficiency is extremely low. For this reason,
As a method having a higher generation efficiency than bremsstrahlung, Japanese Patent Application Laid-Open No. 7-110400 proposes "a method and apparatus for generating high-intensity X-rays or γ-rays". The generation of synchrotron radiation according to this publication is such that the electron beam crosses the laser light accumulated in the photon accumulation cavity forming the optical resonator, and high-intensity radiant light is generated by Compton scattering. .

[0004]

By the way, the high-intensity γ-rays can be used for limited applications such as the above-mentioned radioactive nuclear waste annihilation treatment, but the energy level thereof is higher than that currently obtained. Then, it becomes possible to irradiate the radioactive nuclear waste to transmutate it to perform nuclear annihilation processing and to use it in a new system nuclear reactor for obtaining thermal energy. A method has already been proposed in which such high-intensity γ-rays are generated by the method of bremsstrahlung to irradiate nuclear waste to cause nuclear fission. However, since the generation efficiency of γ-rays of the bremsstrahlung method is low and the energy required for transmutation using this is large and more than the energy generated by nuclear fission, the nuclear power generation method using γ-rays of this bremsstrahlung method is actually It was decided that it could not be adopted. However, there is a possibility that γ-rays of even higher brightness can be obtained by improving the method of generating synchrotron radiation by the Compton scattering method described above. Therefore, the present inventor further researched the above-mentioned Compton scattering method of generating synchrotron radiation, and arrived at a method and apparatus for obtaining ultra-high brightness γ-rays.

In the above-mentioned conventional Compton scattering type radiation generation method, the laser light is accumulated in the light accumulating cavity, but the electrons only cross the laser light in the cavity once or at most several times. The energy of the γ rays generated is higher than that of the bremsstrahlung method, but still insufficient. Further, regarding the energy spectrum of the generated radiated light, although the spectrum has good coupling to nuclear resonance, it requires light and an electron beam with enormous energy because of its small cross-sectional area.

[0006] In view of the above problems, the present invention enables the transmutation for the nuclear annihilation treatment of radioactive waste by the Compton scattering method which can obtain the synchrotron radiation of higher energy level than the bremsstrahlung method. An object of the present invention is to obtain an ultra-high brightness radiant light generation method and device which can obtain ultra-high brightness radiant light having a peak number of photons at an energy level with a compact and small-scale facility.

[0007]

As a means for solving the above problems, the present invention oscillates laser light from a laser generator by circulating it through the laser generator or reciprocating in multiple steps. , An interaction region where electrons in the electron storage path accumulated by circulating an electron beam accelerated to a relativistic velocity are partially shared by the photons in the photon storage path that have accumulated the photons. In order to generate ultra-high brightness synchrotron radiation, the spin directions of the particle spins are opposite to each other and the helicity products of the two particles collide so as to have the maximum negative value that is closest to the theoretical value -1. This is the method of generating super bright radiant light.

As an apparatus for carrying out the above method, a laser generating section for generating a laser beam and a plurality of ultra-high reflection mirrors passing through the laser generating section are circulated or reciprocated in multiple stages to oscillate the laser beam. A photon storage cavity having an optical resonator for storing photons, and an electron storage ring for circulating and storing an electron beam accelerated by an accelerator to a speed close to the speed of light are provided. The path of the electron storage ring is partially provided in common, and in the interaction area of this common path, the rotation direction of the electron beam with respect to the photon is opposite to the traveling direction of the photon and the helicity product of both is theoretical value -1.
It is possible to provide an ultra-high brightness radiant light generation device configured to generate an ultra-high brightness radiant light by colliding so as to have a maximum negative value closest to.

According to the method and apparatus for generating radiant light of the present invention having such a structure, gamma ray radiant light having a higher energy level and a larger number of photons can be obtained with a facility smaller than the radiant light by any conventional method and device. To be Such radiated light causes high-energy level laser light and high-brightness electrons to collide with each other and is generated based on a special Compton scattering method.
The special Compton scattering method is performed under the following specific conditions.

First, in order to increase the energy of both the laser beam and the electron beam to a high energy level, the laser beam is circulated in the photon accumulation path or accumulated in a reciprocating manner in multiple stages, and the electron beam is also accumulated in the electron accumulation path. Circulate and accumulate. In this case, when the laser light circulates or reciprocates the spontaneous emission light generated in the laser generator and oscillates by superimposing on the newly generated emission light, the oscillated laser light always passes through the laser generator again, Spontaneous radiation generated in the above is further superposed there to have a high energy level. Electron beam
It circulates in the circulation path while being accelerated to the relativistic velocity by the accelerator, but the loss of velocity due to the loss of synchrotron radiation when the orbit is bent is re-accelerated in the route. Always circulates at a high energy level.

The laser light stored in the path must be circularly polarized as it circulates or travels back and forth through the interaction zone. Therefore, in the laser generator, for example, a laser beam generated by using a free electron laser using a helical wiggler is obtained as circularly polarized light. Except when the helical wiggler is used, for example, in the case of laser light generated as linearly polarized light, it is sent out as circularly polarized light using a polarizing plate or a rotating polarization element.

On the other hand, the electron beam also needs to rotate in a predetermined direction when colliding in the interaction region. This rotation is
When the orbit of the electron beam is bent and circulated, the action of an electromagnet gives a rotating spin to the electron.This rotating spin is combined with the traveling speed because the electron progresses at a speed close to the speed of light, and the electron rotates in the traveling direction. Behave like you are. If the rotation of the electrons is adjusted in the opposite direction to the rotation of the photon of the laser light in advance, the helicity product when the two collide with each other is theoretically -1. This helicity product is actually the closest possible negative value of about -0.6 to -0.7 even if the rotation of electrons and the rotation of photons are variously adjusted.

When the electron beam collides with a photon in the interaction region, the reaction tends to cause the electron to deviate from its orbit. It is necessary to keep this within a predetermined range, and for this purpose, the wavelength of the interacting laser light needs to be long to some extent. In practice, laser light in the infrared to far infrared region of about 1 μm to 100 μm is used. This is because if the wavelength is long, the electron progress can be returned to the original orbit within the range of the wavelength.

In order to efficiently obtain ultra-high brightness radiated light in the interaction region, the bunches of the laser beam and the electron beam are pulsed, and the frequencies of the laser beams and the electron beams are mutually changed so that the degree of collision is high in the interaction region. Pre-adjust to be consistent in time and space. Therefore, the frequency of the laser light is made to match the frequency of the bunch of the electron beam, or the oscillation frequency of the laser light is adjusted to an appropriate multiple of the circulation of the electrons.

In the special Compton scattering method that occurs under such conditions, the energy spectrum distribution of the number of photons of the emitted light peaks at a predetermined energy level,
The energy of scattered light can be concentrated on a specific energy level to irradiate an object.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an overall schematic configuration diagram of an ultra-high brightness synchrotron radiation light generating apparatus according to the first embodiment. The synchrotron radiation generator of this embodiment is based on a combination of a circulating photon storage cavity 10 and an electron storage ring 20, as shown in the figure. The photon storage cavity 10 includes a free electron laser 14 and a photon storage ring 17 that stores the generated laser light. The free electron laser 14 is composed of a helical wiggler 14a, in which an electron beam is introduced at a relativistic velocity (a velocity close to the speed of light) with respect to a helical magnetic field formed by a helical coil, and a laser beam is generated by its interaction. The laser light is circularly polarized.

The free electron laser 14 emits an electron beam (pulse-shaped in the illustrated example) emitted from the electron gun 11 to the R-beam.
F (high frequency) accelerator 12 accelerates to a relativistic velocity,
Helical wiggler 14a through electromagnets 13a and 13b
Is introduced from one end to generate laser light. A predetermined current is conducted to the helical coil of the helical wiggler 14a, the electron beam is accelerated and decelerated by the action of the magnetic fields of different directions created by this coil, and thereby laser light is generated. Electron beam is helical wiggler 1
After exiting 4a, the electromagnets 13d to 13g of the first electron storage ring 15 circulate and return to the helical wiggler for use. It should be noted that the first electron storage ring 15 is provided with an RF cavity for re-accelerating the electron beam in the circulation path, and the path of the electron beam is surrounded by a path duct. It is not shown in the figure for avoidance.

The laser beam generated by the free electron laser 14 is a light accumulating means 1 comprising a plurality of sets of mirrors 16a, 16.
Accumulated in 7. In the illustrated example, the mirror 16a is a plate-shaped reflection mirror and is provided at two locations outside both ends of the free electron laser 14, but it may be a polygonal circulation path provided at two or more locations. Another pair of mirrors 16
b and 16b are provided with concave resonator mirrors at two positions. As will be described later, the resonator mirrors 16b and 16b
This is because the laser beam is focused and resonated to the minimum spot diameter in the interaction region between 16b.

Further, the resonator mirrors 16b and 16b are provided.
A pair of transmissive Fabry-Perot type optical resonator mirrors 18, 18 are installed between the two, outside the interaction area. The resonator mirrors 18 and 18 form a laser undulator by sending an electron beam to the electromagnetic field of the laser light circulating in the circulation path. The resonator mirrors 18 and 18 further adjust the phase of the laser light sent between the resonator mirrors, and accumulate strong laser light in the meantime. The resonator mirrors 18, 18 are transmissive mirrors, and have a reflectance of 80% and a transmittance of 20%, for example.
A reflecting agent is applied so that

A part of the circulation path of the second electron storage ring 20 is commonly provided between the resonator mirrors 18 and 18 to form an interaction area. This electron storage ring 20 accelerates an electron beam from an electron gun 21 that generates an electron beam to a relativistic velocity by an RF accelerator 22, passes through an electromagnet 23a, bends an orbit by an electromagnet 23b, and advances to an interaction region. , 23c, a plurality of sets of electromagnets 23d,
It is formed so as to circulate in the circulation path by 23e, 23f and the like. Although the arrangement configuration of the electromagnets 23a to 23f is a hexagonal polygon, it may be a polygon having another shape than the hexagon. An RF cavity portion and a path duct are also provided in this electron storage ring, but they are omitted for simplicity of illustration.

The resonator mirrors 18 and 18 form a laser undulator by sharing a part of the path of the electron storage ring 20 with the path between the resonator mirrors 18 and 18. However, the traveling direction of the electron beam is opposite to the direction in which the laser light moves along the circulation path, as shown by the arrow in the figure. The electron beam collides with the laser beam in the interaction region between the electromagnets 23b and 23c to generate γ-ray emission light, and the resonator mirrors 18, 18 increase the oscillation of this emission light to cause one resonator to oscillate. Mirror 18 (left side in the figure)
Is emitted from the light source, passes through the condenser mirror 16b, and is output to the outside.

In the ultra-high brightness synchrotron radiation generator having the above structure,
MeV-class high-energy photon γ-rays based on the Compton scattering method can be obtained. As conditions for obtaining such high-energy photons, the laser light used is circularly polarized, the wavelength of the laser light is somewhat long (infrared to far infrared) of about 1 to 100 μm, and electron Storage ring 20
It is necessary to be pulsed light in order to match with. Therefore, in the illustrated example, the free electron laser 14 uses the helical wiggler 14a. However, when a wiggler composed of a plurality of electromagnets having different polarities periodically is used, a polarizing plate or a rotary polarizing element may be inserted into the output light to circulate it as circularly polarized light.

The laser beam generated by the free electron laser 14 is sent out with the bunch of the electron beam from the RF accelerator 12 adjusted in advance so that the oscillation frequency of the laser beam is suitable for generating γ-ray emission light. , Pulsed laser light is generated by the interaction with the periodic electromagnetic field in the helical wiggler 14a. The electron beam then circulates in the first storage ring 15, is re-accelerated in an RF cavity (not shown), and is repeatedly used.

The laser light circulates via the reflection mirror 16a and the condenser mirror 16b, and again the helical wiggler 14a.
The laser light newly generated each time the laser beam passes through is overlapped and gradually amplified. At this time, the laser beam is 1 to 100 μm
Since the wavelength of the laser light is relatively long, even if the phase of the new laser light is slightly deviated, the phase is aligned in the circulation path and a resonance state is achieved. Therefore, this allows the reflection mirror 16,
Strong laser light is accumulated in the first optical resonator 16 formed by the condenser mirror 16b.

The laser light thus accumulated is accumulated as a stronger laser light between the second optical resonators 18, 18 placed between the condenser mirrors 16 to 16, and the second optical resonator 18, 18 acts as a laser undulator. In this case, the basic laser light accumulated between the second optical resonators 18 and 18 is fed by the condenser mirrors 16b and 16b so as to be condensed to the minimum diameter in the vicinity of the intermediate position thereof, and the distance L between the mirrors is reduced. Is finely adjusted so that a standing wave is accumulated in the resonator.

The intensity of the laser beam to be sent is different from that of the intense laser beam generated by adjusting in advance the frequency of the electron beam bunch to match the frequency of the intense laser beam accumulated in the second resonators 18, 18. When the bunch of the electron beam from the second electron storage ring 20 is sent from the opposite direction to the direction, the electron beam collides with the powerful laser light in a predetermined interaction region before and after the convergence point where the intense laser light converges to the minimum diameter. However, strong γ-ray radiation is generated based on Compton scattering.

In this case, since the basic laser light is sent into the second optical resonators 18 and 18 as circularly polarized light, it is also accumulated as strong laser light in the second optical resonators 18 and 18 as circularly polarized light. On the other hand, as shown in FIG. 3A, the electromagnet 2 is applied to each electron even for the electron beam.
Rotation is given at the same time as the action of bending the orbit by the downward magnetic field components 3a to 3f, and the direction of the electron spin by this is vertical, but since the electron progresses at a relativistic velocity similar to the speed of light, The rotation direction of the spin and the traveling direction of the electron are combined so that the electron spin behaves as if it were swirling.

At this time, as shown in FIG. 3 (b),
If the two collide in the interaction region with their rotation directions adjusted in advance so that the direction of circular polarization of the laser beam and the direction of rotation of the electrons are opposite, the helicity product is the maximum negative value that is closest to the theoretical value -1. The value is Compton scattering. Γ-ray radiated light generated by colliding electrons with laser light by such a special Compton scattering method has a characteristic that the probability distribution in the energy spectrum distribution of the number of photons is concentrated at a specific energy level and sharply increases. .

The radiated light having the above-mentioned characteristics is also called a laser undulator light and is not due to a simple Compton scattering method, but due to the sophistication of the laser and the high brightness of the electron beam. It is necessary to meet the condition of.

Θ <(λs / Nλo) (1) (Δγ / γ) · (γ) ⁻² <(λs / Nλo) (2) where λs is the wavelength of scattered light and λo Is the wavelength of the laser light,
θ represents the angular spread of the electron beam, (Δγ / γ) represents the energy spread of the electron beam, and N represents the number of coherent interaction pitches. In practice, when scattered light, that is, γ-ray emission light is generated by setting parameters such as wavelength and angle spread so as to satisfy the above conditions for laser light and electron beam, the wavelength λs satisfies the above formula. .

A graph of the energy spectrum distribution of the number of photons of the γ-ray radiated light having the above characteristics is shown in FIG. 4 in comparison with γ-ray radiated light generated by another method. In FIG. 4A, (C) shows the change in the number of photons due to bremsstrahlung, and (B) shows the change in the number of photons due to general Compton scattering. Then, (a) is the change in the number of photons in the special Compton scattering method used in this embodiment. In the collision of the laser beam and the electron beam, the particle spins of both are directed in a specific direction, and the rotation directions of both are reversed. This is a case where the product of the helicity is generated so that the product of the helicity becomes the maximum negative value that is closest to the theoretical value −1 by giving the direction. It should be noted that this helicity product is actually the closest possible negative value of about -0.6 to -0.7 even if the rotation of electrons and the rotation of photons are variously adjusted.

However, the graph shown in the drawing shows the probability distribution of the number of photons viewed as the spectral distribution of the generated γ-ray energy with the energy of the electron beam used for bremsstrahlung and Compton scattering at the same level. In the graph of (a), the number of photons peaks near the gamma ray energy of 16 MeV, and therefore the number of photons by this method is orders of magnitude higher than that by the bremsstrahlung method, which is several times or more that of the general Compton scattering method.

As described above, various uses of γ rays generated by the special Compton scattering method, which has a characteristic that the number of photons of γ rays rapidly increases, will be described later. , Irradiating radioactive waste to cause nuclear transmutation and nuclear annihilation processing. For this purpose, when the radioactive waste is irradiated with γ-rays generated by the above-described high-intensity synchrotron radiation generator to cause nuclear transmutation, the nuclear giant resonance cross-section shown in FIG. As shown in the graph showing the change in the cross section of the giant resonance, the electron-positron pair creation is caused by γ-rays at the same time as the action of transmutation.
The effective cross-sectional area of the atoms that contribute to this creation is large,
However, the cross-sectional area that contributes to the nuclear giant resonance when causing nuclear transmutation is as small as several hundred mb. And
The energy of this nuclear giant resonance is 14 to 16 MeV at the center value.
And the resonance width is 3 to 4 MeV.

Therefore, in order to effectively act on the nuclear giant resonance, the number of photons absorbed by the nuclear giant resonance corresponding to the central energy of the γ-ray at which the cross section of the nuclear giant resonance is maximum is converted into the nuclear conversion. Must be above a level sufficient to cause On the other hand, in the case of γ-ray generation by the special Compton scattering method described above, the probability distribution of the number of photons in the region corresponding to the energy center value of the predetermined region including the energy value where the absorption cross-section due to the nuclear giant resonance of γ-rays is maximum Occurs so as to reach a peak. Therefore, the γ-rays generated in the region where the number of photons peaks (corresponds to) the central value energy of the γ-rays where the nuclear giant resonance cross-section becomes maximum is
Energy values and photon numbers are compatible with transmutation of radioactive waste. For this reason, it is possible to sufficiently carry out the nuclear annihilation process with a small-scale facility as a whole, rather than a huge facility equipped with a long accelerator.

In the first embodiment, the free electron laser 1
Reference numeral 4 denotes a pair of reflection mirrors 16a and a pair of condenser mirrors 16b.
The second optical resonators 18, 18 are provided in the circulation path of the photon storage ring 17 of the laser light set in the first optical resonator 16, where the laser light is enhanced with high accuracy and the laser undulator light (γ-ray emission light) is provided. However, the second optical resonators 18 and 18 do not necessarily have to be provided. The radiated light generated by the helical wiggler 14a is the first resonator 1
The respective mirror positions of 6 are set with high precision, and the basic laser light itself is adjusted so as to be generated as a standing wave.

The basic laser light thus adjusted is similarly set so as to converge to the minimum diameter at the central position between the pair of condenser mirrors 16b, 16b. Similar to the first embodiment, the laser undulator light is generated by the special Compton scattering method by colliding with the electron beam bunch in the interaction region. In this case, it is necessary to adjust the positions of the pair of reflecting mirrors 16a, 16 and the pair of collecting mirrors 16b, 16b so that the basic laser light becomes a standing wave in the entire circulation path. The adjustment is slightly more complicated than in the first embodiment.

FIG. 5 shows an overall schematic configuration diagram of the ultra-high brightness radiant light generator of the second embodiment. In this embodiment, the photon storage cavity 10 'uses optical resonators 16c to 16d to 16c for diffusing and condensing the laser light in a multi-stage manner, and in the example shown in the figure, it is guided to a laser light generating means. The basic idea of the device is the same, except that a wave-tube type carbon dioxide laser is used. Also, the electron storage ring 2
0'is also the same as the first embodiment in that a part of its circulation path is provided in common with a partial path of the optical resonators 16c to 16d.

The laser emitting means 14 'is a waveguide type laser tube into which a mixed gas of carbon dioxide gas (CO ₂ ) and N ₂ and He is fed from the outside as a laser medium, and is circulated and discharged.
Electrons discharged between the anode and cathode discharge electrodes provided at both ends of the laser tube collide with a mixed gas of CO ₂ to excite gas molecules, and the transition of the mixed gas causes stimulated emission of laser light. The basic configuration is the same as the known one.

The laser beam generated by the laser beam generator 14 'is a condenser mirror 16 using a pair of concave mirrors on the left side.
Of the d and 16c, the light is first reflected by the condenser mirror 16c on the right side, passes through the laser tube 14a ′, and the condenser mirror 16 on the opposite side.
It is expanded at d and sent to the condensing mirrors 16c and 16d using a pair of concave mirrors on the right side. The laser light reflected and condensed by the pair of condenser mirrors 16d on the right side is condensed around the focal point at the left side of the center, is reflected by the condenser mirror 16c on the left side, and then is condensed on the right side. Is reflected back to the path of the pair of condenser mirrors 16d and 16c on the left side, passes through the laser tube again, and is reflected on the condenser mirror 16c on the right side.
A new laser light is amplified each time it passes 4a ',
Accumulated.

Therefore, the pair of condenser mirrors 16d on the left side,
16c and the pair of condenser mirrors 16c and 16d on the right side constitute an optical resonator, forming a photon storage cavity 10 '. Further, a common path is formed so that a part of the electron beam circulation path of the electron storage ring 20 'forms a common interaction area of a predetermined length centering on the focal point position between the pair of right-side condenser mirrors 16c and 16d. Although it is a circulation path having a quadrangular shape in a plan view, the electron storage ring 20 'having basically the same configuration and function is the same as that of the first embodiment, and therefore the description thereof is omitted.

Furthermore, a pair of right-side condenser mirrors 16c,
The point that the second optical resonators 18, 18 are provided between 16d is also the same as in the first embodiment. This second optical resonator 1
The points 8 and 18 are also the same as those in the first embodiment in that a standing wave is formed between both mirrors, laser light is accumulated and strengthened between them to generate undulator light with high accuracy and reliability. A small hole 16h for passing the γ-ray emission light is provided in the center of the right-side focusing mirror 16d. In addition, a polarizing plate or a rotary polarizing element is used as necessary to make the generated laser light circularly polarized.

The operation of the radiated light generator of the second embodiment having the above-mentioned structure is such that an optical resonator is provided in multiple stages, and laser light is amplified and stored in the optical resonator, but the amplified laser is different. The strong γ-ray emission light is generated based on the special Compton scattering by the collision between the light and the electron accumulation beam, which is also the same as in the first embodiment, and the same description will not be repeated.

Although the carbon dioxide gas laser is used as the laser generating means 14 ', a waveguide type free electron laser may be used instead. In this case, the laser generating means 14 'is provided with the free wiggler 14 composed of the helical wiggler 14a of FIG. 1 or an ordinary wiggler using electromagnets having periodically different polarities. Therefore, along with this, the first electron storage ring 15 including the electron gun 11, the RF accelerator 12, and the electromagnets 13a to 13g is provided.

FIG. 6 shows an overall schematic configuration diagram of an ultra-high brightness radiant light generator according to the third embodiment. This example is a partial modification of the second embodiment, in which the first optical resonator 16 is formed by three condenser mirrors 16c, 16d, 16c, and the laser light is condensed by a pair of condensers at the bottom in the figure. The difference from the second embodiment is that the focal points of the mirrors 16d and 16c are used. Other configurations, actions,
The effect is basically the same as that of the second embodiment, and detailed description thereof will be omitted. As the laser light generating means 14 ',
Also in this example, it is premised that the waveguide type carbon dioxide gas laser is used. However, the waveguide type free electron laser may be used as in the case of the second embodiment.

FIG. 7 shows an overall schematic configuration of the ultra-high brightness radiant light generator of the fourth embodiment. The generator of this embodiment is similar in appearance to the device of the third embodiment of FIG. 6, except that the photon storage cavities 10 '''are multi-staged and do not store photons of the laser light. , It is different in that it is circulated and accumulated in one direction. As shown in the figure, the optical resonator is composed of condenser mirrors 16c, 16d, and 16e, and the laser light condensed by the condenser mirror 16e is sent counterclockwise in the illustrated example and is again emitted from the condenser mirror 16c. The carbon dioxide gas laser 14 ', which is a means for generating laser light, is sent to accumulate the laser light. The interaction area is the collecting mirrors 16d and 16
It is provided between e.

In each of the above embodiments, the example in which the second optical resonator 18 is provided is shown, but the second optical resonator 18 can be omitted in each embodiment. Even if the second optical resonator 18 is omitted, the emitted light generated in the laser generator is accumulated as a standing wave in the mirror of the first optical resonator 16 so that the emitted light is oscillated by the first optical resonator 16, respectively. , The oscillation is performed by setting the distance between the mirrors with high accuracy.

As a method of using the ultra-bright synchrotron radiation obtained by the present invention, if the surplus power at night among the power generated by the nuclear power generation facility is used for generating the synchrotron radiation, It is possible to effectively use the power generation equipment. This is because the nuclear power generation facility cannot be stopped even at night when it starts to carry out operations. On the other hand, in nuclear power generation facilities, it is a nuclear waste ²³⁷
Np (Neptium) is produced. This is because when this ²³⁷ Np is used as the target and is irradiated with the ultra-high-intensity synchrotron radiation obtained by the apparatus of each embodiment, ²³⁵ U (uranium) is generated by transmutation, and this can be reused as nuclear fuel again. .

[0048]

As described above in detail, in the method and apparatus for generating super-bright radiant light of the present invention, high-energy photons are accumulated in the photon accumulation path, and the electron beam also has high energy in the electron accumulation path. Accumulate in the level, and in the interaction region where both paths are partially common, the rotation directions of the spins of the photon and electron are opposite, and the helicity product of both becomes the maximum negative value closest to the theoretical value -1. The ultra-bright synchrotron radiation is generated by the Compton scattering method of rotating and colliding with each other. In addition, the energy of the emitted light can be variously changed by changing the wavelengths of electrons and laser light.

[Brief description of drawings]

FIG. 1 is an overall schematic configuration diagram of an ultra-high brightness synchrotron radiation generator according to a first embodiment.

FIG. 2 is a partially enlarged configuration diagram of the same as above.

FIG. 3 is a partial explanatory diagram of operation contents.

FIG. 4A is a probability distribution diagram in the energy spectrum distribution of the number of photons due to the special Compton scattering action. FIG. 4B is an energy spectrum distribution diagram of the cross section due to the nuclear giant resonance of radioactive waste.

FIG. 5 is an overall schematic configuration diagram of an ultra-high brightness synchrotron radiation generator according to a second embodiment.

FIG. 6 is an overall schematic configuration diagram of an ultra-high brightness synchrotron radiation generator according to a third embodiment.

FIG. 7 is an overall schematic configuration diagram of an ultra-high brightness synchrotron radiation generator according to a fourth embodiment.

[Explanation of symbols]

10, 10 ', 10' ', 10' '' Photon storage cavities 11, 21 electron gun 12, 22 RF accelerator 13, 23 Electromagnet 14 Free electron laser 14a Helical wiggler 15 First electron storage ring 16 First optical resonator 17 photon storage ring 18 Second optical resonator 20 Second electron storage ring

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) H01S 3/30 H01S 3/30 Z

Claims (7)

[Claims] 1. A laser beam emitted from a laser generator is circulated through the laser generator or reciprocated in multiple stages to oscillate the laser beam, and the photon stored in the photon storage path is relativistic. Electrons in the electron accumulation path accumulated by circulating the electron beam accelerated to the velocity are in the interaction region where both paths are partially common, and the direction of rotation of the particle spin with respect to the traveling direction of both is reversed. An ultra-bright radiant light generation method in which ultra-bright radiant light is generated by colliding so that the helicity product of both becomes the maximum negative value closest to the theoretical value -1. 2. A laser generator that generates laser light, and an optical resonator that oscillates the laser light by circulating it in a plurality of ultra-high reflection mirrors or reciprocating in multiple stages through the laser generator to accumulate the photons. And a photon accumulation cavity having a photon accumulation cavity and an electron accumulation ring that circulates and accumulates the electron beam by accelerating the electron beam to a speed close to the speed of light by an accelerator, and partially defines the path of the photon accumulation cavity and the path of the electron accumulation ring. Are provided in common, and in the interaction region of this common path, the direction of rotation of the electron beam with respect to the photon is opposite to the traveling direction of the two, and the helicity product of both becomes the maximum negative value that is closest to the theoretical value -1. Ultra-high brightness synchrotron radiation generating device configured to generate ultra-high brightness radiant light by colliding as described above. 3. A polarization means for generating laser light oscillated by the laser generator as circularly polarized light or circularly polarized light is provided, and the orbit of the electron is bent along the path of the electron storage ring and the electron is spin-spinned. 3. The ultra-high brightness radiant light generator according to claim 2, wherein the helicity product of photons and electrons is configured to have a maximum negative value that is closest to a theoretical value of −1 by providing an electromagnetic means for imparting. . 4. A second optical resonator is provided in the path between the reflection mirrors including the partially common path, and a standing wave is generated in the second optical resonator to generate photons stored as electrons. The ultra-high brightness radiant light generator according to claim 2 or 3, characterized in that it is made to collide with. 5. The ultra-high brightness radiant light generator according to claim 2, wherein the laser generator is a free electron laser generator. 6. The ultra-high brightness radiant light generator according to claim 5, further comprising an electron storage ring for circulating and storing electrons sent to the free electron laser generator. 7. The ultra-high brightness radiant light generator according to claim 2, wherein the laser generator is a waveguide type carbon dioxide gas laser.