CN116870699A - Irradiation system for laser isotope separation - Google Patents
Irradiation system for laser isotope separation Download PDFInfo
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- CN116870699A CN116870699A CN202310783876.7A CN202310783876A CN116870699A CN 116870699 A CN116870699 A CN 116870699A CN 202310783876 A CN202310783876 A CN 202310783876A CN 116870699 A CN116870699 A CN 116870699A
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- laser light
- laser
- mixed gas
- mirror
- temperature region
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- 238000005369 laser isotope separation Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000000155 isotopic effect Effects 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims 2
- 230000005284 excitation Effects 0.000 description 9
- 238000005372 isotope separation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000011166 aliquoting Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000539 dimer Substances 0.000 description 1
- 238000006471 dimerization reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D59/00—Separation of different isotopes of the same chemical element
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Lasers (AREA)
Abstract
Embodiments of the present application provide an irradiation system for laser isotope separation, comprising: the wall body of the cavity is provided with an incident window and an emergent window; the low-temperature region is positioned in the chamber and is used for representing a region, formed in the expansion process, of the mixed gas, wherein the temperature of the region is in a preset temperature range, and the mixed gas comprises isotope molecules to be separated; the n reflection groups are arranged on the inner wall of the cavity and comprise two opposite reflectors; the laser is transmitted to the chamber from the incident window, the laser irradiates the mixed gas in the low-temperature region, then the laser is reflected to the other reflector in the ith reflection group by one reflector in the ith reflection group, the other reflector reflects the laser so that the laser irradiates the mixed gas in the low-temperature region, then the laser is transmitted to the (i+1) th reflection group or emitted from the emergent window, and the mixed gas in the low-temperature region is irradiated by the laser to selectively excite target isotope molecules.
Description
Technical Field
At least one embodiment of the application relates to an isotope separation system, and in particular to an irradiation system for isotope separation.
Background
The basic principle of isotope concentration or separation is that laser is utilized to selectively excite target isotope molecules to inhibit dimerization and form super-heated monomers in the pneumatic transportation process, so that the radial diffusion speed of the target isotope molecules is increased, and the non-target isotope molecules exist in a dimer form.
The related technology has higher energy requirement on laser emitted by a laser device when isotope separation is carried out, and has higher technical requirement on the laser and higher equipment investment.
Disclosure of Invention
The present application has been made in view of the above problems, and aims to provide an irradiation system for laser isotope separation which overcomes or at least partially solves the above problems.
According to an embodiment of the present application, there is provided an irradiation system for laser isotope separation, including:
the cavity is provided with an incident window and an emergent window on the wall body of the cavity, wherein the incident window is suitable for transmitting laser to the cavity, and the emergent window is suitable for a transmission outlet of the laser in the cavity;
the low-temperature region is positioned in the chamber, wherein the low-temperature region represents a region of which the temperature formed in the expansion process of the mixed gas is in a preset temperature range, and the mixed gas comprises isotope molecules to be separated;
the n reflection groups are arranged on the inner wall of the cavity and comprise two opposite reflectors;
the laser is transmitted to the chamber from the incident window, the laser irradiates the mixed gas in the low-temperature region, then the laser is reflected to the other reflector in the ith reflection group by one reflector in the ith reflection group, the other reflector reflects the laser so that the laser irradiates the mixed gas in the low-temperature region, then the laser is transmitted to the (i+1) th reflection group or emitted from the emergent window, and the mixed gas in the low-temperature region is irradiated by the laser to selectively excite target isotope molecules.
The irradiation system for laser isotope separation provided by the embodiment of the application realizes the multiple irradiation of the mixed gas in the low-temperature region by utilizing the multiple reflection groups to reflect the low-energy pulse laser, so that target isotope molecules can be selectively excited, the energy requirement of the pulse laser input by the irradiation system during isotope separation is effectively reduced, the technical difficulty and equipment investment of the laser are reduced, and the single-stage concentration efficiency and the concentration economy under low laser energy are effectively improved.
Drawings
FIG. 1 is a schematic diagram of a structure of an isotope separated irradiance system in accordance with one embodiment of the application;
FIG. 2 is a schematic structural view of an isotope separated irradiance system in accordance with another embodiment of the application;
FIG. 3 is a schematic structural view of an isotope separated irradiance system in accordance with yet another embodiment of the application; and
fig. 4 is a schematic structural view of an isotope separated irradiation system in accordance with yet another embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. It will be apparent that the described embodiments are one embodiment, but not all embodiments, of the present application. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present application fall within the protection scope of the present application.
It is to be noted that unless otherwise defined, technical or scientific terms used herein should be taken in a general sense as understood by one of ordinary skill in the art to which the present application belongs. If, throughout, reference is made to "first," "second," etc., the description of "first," "second," etc., is used merely for distinguishing between similar objects and not for understanding as indicating or implying a relative importance, order, or implicitly indicating the number of technical features indicated, it being understood that the data of "first," "second," etc., may be interchanged where appropriate. If "and/or" is present throughout, it is meant to include three side-by-side schemes, for example, "A and/or B" including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously.
The laser achieves selective excitation based on a small spectral shift in the vibrational transitions between isotope molecules and the quasi-monochromatic nature of the laser. The molecular vibration-transformation spectrum is usually in the infrared or even middle infrared band<0.1 eV), absorption cross section σ of the laser excited molecule A About 10 -(18～20) cm 2 In particular for lean gas<1 Pa), the laser is required to have very high flux density to maximize selective excitation of target isotope molecules, and the excitation light source also has characteristics of tunable infrared wavelength, narrow pulse width, narrow band, high repetition frequency, high frequency stability and the like, so that the technical requirement of laser excitation isotope separation on the excitation light source is extremely high, and the laser becomes one of the most critical factors influencing laser isotope separation. For example, a 16 μm laser for uranium enrichment, first a 10.6 μm laser is generated by a TEA CO2 laser, then a 16 μm excitation light source is obtained via Zhong Qingla mann, resulting in very low electrical efficiency of the laser generation.
In view of the above, the present application provides an irradiation system for isotope separation, the irradiation system comprising a chamber, an incident window and an exit window are provided on a wall of the chamber, wherein the incident window is suitable for transmitting laser light to the chamber, and the exit window is suitable for a transmission outlet of the laser light in the chamber; the low-temperature region is positioned in the chamber, wherein the low-temperature region represents a region of which the temperature formed in the expansion process of the mixed gas is in a preset temperature range, and the mixed gas comprises isotope molecules to be separated; the n reflection groups are arranged on the inner wall of the cavity and comprise two opposite reflectors; the laser is transmitted to the chamber from the incident window, the laser irradiates the mixed gas in the low-temperature region, then the laser is reflected to the other reflector in the ith reflection group by one reflector in the ith reflection group, the other reflector reflects the laser so that the laser irradiates the mixed gas in the low-temperature region, then the laser is transmitted to the (i+1) th reflection group or is output from the emergent window, and the mixed gas in the low-temperature region is irradiated by the laser to selectively excite target isotope molecules.
Fig. 1 is a schematic diagram of a structure of an isotope-separated irradiation system 100 in accordance with one embodiment of the present application.
As shown in fig. 1, an irradiation system 100 for laser isotope separation includes:
the laser light source comprises a chamber 110, wherein an incident window 111 and an emergent window 112 are arranged on the wall body of the chamber 110, the incident window 111 is suitable for transmitting laser light to the chamber 110, and the emergent window 112 is suitable for a transmission outlet of the laser light in the chamber 110;
a low temperature region 120 located inside the chamber 110, wherein the low temperature region 120 characterizes a region of a mixed gas, which includes isotopic molecules to be separated, having a temperature within a preset temperature range formed during an expansion process;
n reflection groups 130, which are arranged on the inner wall of the chamber 110, wherein the reflection groups 130 comprise two opposite reflectors;
wherein laser light is transmitted from the incident window 111 to the chamber 110, the laser light irradiates the mixed gas in the low temperature region 120, then the laser light is reflected by one mirror of the ith reflection group 130 to the other mirror of the ith reflection group 130, the other mirror reflects the laser light such that the laser light irradiates the mixed gas in the low temperature region, then the laser light is transmitted to the (i+1) th reflection group 130 or emitted from the exit window 112, and the mixed gas in the low temperature region 120 is irradiated with the laser light to selectively excite the target isotope molecules.
In this embodiment, the temperature of the low temperature region 120 is relatively low, and is mainly used for selectively exciting isotopic molecules in the low temperature region 120 under the irradiation of laser, and the preset temperature range of the low temperature region 120 is estimated by the structural dimensions of the pneumatic nozzle, for example, the estimated temperature is 30K, 40K or 50K.
In this embodiment, in the pulse laser light with lower energy (the solid line with an arrow in fig. 1 to 4 indicates the pulse laser light, wherein the direction of the arrow indicates the propagation direction of the laser light, hereinafter referred to as the laser light) is transmitted from the incident window 111 to the chamber 110, and then irradiates the mixed gas in the low temperature region 120 for the first time, irradiates the first mirror of the first reflection group 130 through the mixed gas in the low temperature region 120 and reflects the mixed gas, irradiates the laser light reflected by the second mirror of the first reflection group 130 again on the mixed gas, and thereafter irradiates the first mirror of the second reflection group 130 through the mixed gas in the low temperature region 120 and reflects the mixed gas on the second mirror, and so on, the laser light reflected by the plurality of reflection groups 130 irradiates the low temperature region 120 in a superimposed manner, and irradiates one region on the low temperature region 120 after the laser light is reflected multiple times, so that the laser energy density on the low temperature region 120 is improved, and the selective excitation efficiency is improved.
In this embodiment, the multiple reflection groups 130 are utilized to reflect the low-energy pulse laser, so as to irradiate the mixed gas in the low-temperature region 120 for multiple times, thereby selectively exciting the target isotope molecules, effectively reducing the energy requirement of the pulse laser input by the irradiation system 100 during laser isotope separation, reducing the laser technical difficulty and equipment investment, and effectively improving the single-stage concentration efficiency and concentration economy under low laser energy.
In this embodiment, the mixed gas in the low temperature region 120 is a gas of a supersonic jet formed by a pneumatic nozzle.
In this embodiment, the longitudinal velocity of the gas, e.g. supersonic jet, in the low temperature zone 120 is about 300m/s, while the diameter of the low temperature zone 120 is about 10mm, preferably the spot diameter of the laser is the same as the diameter of the low temperature zone 120.
In this embodiment, the chamber 110 is a hollow sphere, a hollow cylinder, or a polyhedral sphere.
In the present embodiment, in the case where the chamber 110 is a hollow sphere or a polyhedral sphere, the plurality of reflection groups 130 may be uniformly disposed on the inner wall of the hollow sphere or the polyhedral sphere. The reflection groups 130 are located on the same cross section or the same plane.
Fig. 2 is a schematic structural diagram of an isotope-separated irradiation system in accordance with another embodiment of the present application.
In this embodiment, as shown in fig. 2, the number of the reflection groups 130 is 5, and the laser light reflected by the 5 reflection groups 130 to the low temperature region 120 and the laser light incident on the chamber 110 are irradiated onto the mixed gas in the low temperature region 120 to selectively excite the target isotope molecules.
In this embodiment, the laser light is transmitted from the incident window 111 to the chamber 110, the laser light irradiates the mixed gas for the first time, then the laser light is reflected by one mirror of the 1 st mirror group 130 to the other mirror of the 1 st mirror group 130, the other mirror reflects the laser light such that the laser light irradiates the mixed gas in the low temperature region 120 for the 2 nd time, then the laser light is reflected by one mirror of the 2 nd mirror group 130 to the other mirror of the 2 nd mirror group 130, the other mirror reflects the laser light such that the laser light irradiates the mixed gas in the low temperature region 120 for the 3 rd time, then the laser light is reflected by one mirror of the 3 rd mirror group 130 to the other mirror of the 3 rd mirror group 130, the other mirror reflects the laser light such that the laser light irradiates the mixed gas in the low temperature region 120 for the 4 th time, then the laser light is reflected by one mirror of the 4 th mirror group 130 to the other mirror of the 4 th mirror, the other mirror reflects the laser light such that the laser light irradiates the mixed gas in the low temperature region 120 for the 5 th time to the other mirror of the 5 th mirror group 130, then the laser light is irradiated from the first mirror of the 5 th mirror group 130 to the other mirror of the first mirror group 130, and then the laser light is irradiated from the first mirror of the 5 th mirror group 130 to the other mirror of the first mirror of the window 130.
In one embodiment, the chamber 110 of the irradiance system 100 has a diameter of about 500mm, the supersonic jet low temperature zone 120 has a longitudinal velocity of about 300m/s, the jet low temperature zone 120 has a diameter (comparable to the spot diameter) of about 10mm, and the laser irradiates the jet twice with a time interval of about 2.5ns, which is well below the pulse width of the irradiating laser 80ns; the upper edge of the jet low temperature zone 120 moves downward by about 0.75 μm when the laser irradiates the jet low temperature zone 120 for the second time, the upper edge of the jet low temperature zone 120 moves downward by 0.75 μm when the laser irradiates the jet low temperature zone 120 for the third time, and so on, the upper edge of the jet low temperature zone 120 moves downward by 0.75 μm when the laser irradiates the low temperature zone 120 for the next time, even though the upper edge of the jet low temperature zone 120 moves downward by 6.75 μm when the laser irradiates the 10 th jet low temperature zone 120, the movement is negligible with respect to the low temperature zone 120 with a diameter of about 10 mm. Therefore, the difference between the excitation time and the irradiation space of the low-laser pulse energy multi-irradiation jet low-temperature region 120 and the single irradiation of the high-laser pulse energy is very small, the same excitation effect is achieved, the requirement on the laser pulse energy can be greatly reduced, the laser technology difficulty and the equipment investment are reduced, and the single-stage concentration efficiency and the concentration economy under the low laser energy are effectively improved.
Fig. 3 is a schematic structural view of an isotope-separated irradiation system in accordance with yet another embodiment of the present application. Fig. 4 is a schematic structural view of an isotope separated irradiation system in accordance with yet another embodiment of the present application.
In this embodiment, in the case where the cross section of the chamber 110 is circular and the n reflection groups 130, the entrance window 111, and the exit window 112 are all located at the same height within the irradiation system 100, the mirrors of the n reflection groups 130, the entrance window 111, and the exit window 112 are located at m equal points of the circular shape at the height, where m=2×n+2.
The mirrors, the entrance window 111, and the exit window 112 of the n reflection groups 130 of the present application may not be located at the m-aliquoting point, and it is only necessary to ensure that the mirrors can irradiate the laser light into the same region in the low temperature region 120.
In this embodiment, when n=1, the positions of the reflection group 130, the entrance window 111, and the exit window 112 in the irradiation system 100 are as shown in fig. 1. At n=2, the positions of the reflection group 130, the entrance window 111, the exit window 112 in the irradiance system 100 are shown in fig. 3. At n=3, the positions of the reflection group 130, the entrance window 111, the exit window 112 in the irradiance system 100 are shown in fig. 4. It follows that n may be any positive integer.
It should be noted that, the size of any one of the reflectors may be adjusted according to the actual requirement, and it is not required that the sizes of all the reflectors are the same, and the actual irradiation times are mainly limited by the influences of the diameter of the irradiation system 100, the size of the light spot, the size of the reflector, and the like.
The present application has been described in detail with reference to the drawings and the embodiments, but the present application is not limited to the embodiments described above, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application. The application may be practiced otherwise than as specifically described.
Claims (6)
1. An irradiation system for laser isotope separation, comprising:
the laser processing device comprises a chamber, wherein an incident window and an emergent window are arranged on the wall body of the chamber, the incident window is suitable for transmitting laser to the chamber, and the emergent window is suitable for a transmission outlet of the laser in the chamber;
the low-temperature region is positioned in the chamber, wherein the low-temperature region represents a region, in which the temperature formed in the expansion process of the mixed gas is in a preset temperature range, and the mixed gas comprises isotopic molecules to be separated;
n reflection groups are arranged on the inner wall of the cavity, and each reflection group comprises two opposite reflection mirrors;
wherein the laser light is transmitted from the incident window to the chamber, the laser light irradiates the mixed gas in the low temperature region, then the laser light is reflected by one mirror in the ith reflection group to the other mirror in the ith reflection group, the other mirror reflects the laser light so that the laser light irradiates the mixed gas in the low temperature region, then the laser light is transmitted to the (i+1) th reflection group or is emitted from the exit window, and the mixed gas in the low temperature region is irradiated by the laser light to selectively excite target isotope molecules.
2. The irradiance system of claim 1, wherein the mixed gas in the low temperature zone is a gas of a supersonic jet formed by a pneumatic nozzle.
3. The irradiance system of claim 1, wherein the chamber is a hollow sphere, a hollow cylinder, or a polyhedral sphere.
4. A radiation system according to any one of claims 1 to 3, wherein, in the case where the cross section of the chamber is circular and n of the reflection groups, the entrance window, the exit window are all located at the same height within the chamber, the mirrors of n of the reflection groups, the entrance window, the exit window are located at m bisectors of the circular shape at the height, where m = 2 x n +2.
5. A radiation system according to any one of claims 1 to 3, wherein the number of reflection groups is 5, and the laser light reflected by 5 reflection groups to the low temperature region and the laser light incident on the chamber are irradiated onto the mixed gas in the low temperature region to selectively excite the target isotope molecules.
6. The irradiation system according to claim 5, wherein the laser light is transmitted from the entrance window to the chamber, the laser light irradiates the mixed gas in the low temperature region for the first time, after which the laser light is reflected by one mirror of the 1 st reflection group to another mirror of the 1 st reflection group, the other mirror reflecting the laser light such that the laser light irradiates the mixed gas in the low temperature region for the 2 nd time; the laser light is then reflected by one mirror of the 2 nd reflection group to another mirror of the 2 nd reflection group, the other mirror reflects the laser light such that the laser light irradiates the mixed gas in the low temperature region for the 3 rd time, the laser light is then reflected by one mirror of the 3 rd reflection group to another mirror of the 3 rd reflection group, the other mirror reflects the laser light such that the laser light irradiates the mixed gas in the low temperature region for the 4 th time, the laser light is then reflected by one mirror of the 4 th reflection group to another mirror of the 4 th reflection group, the other mirror reflects the laser light such that the laser light irradiates the mixed gas in the low temperature region for the 5 th time, the laser light is then reflected by one mirror of the 5 th reflection group to another mirror of the 5 th reflection group, the other mirror reflects the laser light such that the laser light emits the mixed gas in the low temperature region for the 6 th time, and the laser light window is then emitted from the laser light window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310783876.7A CN116870699A (en) | 2023-06-29 | 2023-06-29 | Irradiation system for laser isotope separation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310783876.7A CN116870699A (en) | 2023-06-29 | 2023-06-29 | Irradiation system for laser isotope separation |
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| Publication Number | Publication Date |
|---|---|
| CN116870699A true CN116870699A (en) | 2023-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310783876.7A Pending CN116870699A (en) | 2023-06-29 | 2023-06-29 | Irradiation system for laser isotope separation |
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| Country | Link |
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| CN (1) | CN116870699A (en) |
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- 2023-06-29 CN CN202310783876.7A patent/CN116870699A/en active Pending
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