Novel wide-energy-spectrum monochromator and use method thereof

Abstract

The invention discloses a novel wide-energy-spectrum monochromator and a using method thereof. The novel wide-energy-spectrum monochromator comprises a posture adjusting mechanism. A double-multilayer-film monochromator, a Si (111) bicrystal monochromator, a Si (311) bicrystal monochromator and a component double-Laue bent crystal monochromator are horizontally arranged on the posture adjusting mechanism. The double-multilayer-film monochromator comprises two multilayer films, and the two multilayer films are placed and adjusted according to the mode of the double-crystal monochromator. The posture adjusting mechanism is used for switching and selecting the required monochromator according to the energy region where the required monochromatic light is located; the double multilayer film monochromator works in an area of 1-3keV, the Si (111) bicrystal monochromator works in an area of 2.5-42keV, the Si (311) bicrystal monochromator works in an area of 40-75keV, and the component double Laue bent crystal monochromator works in an area of 70-100keV. According to the invention, full coverage from a low-energy region to a high-energy region is realized, different experiments are carried out in situ, and sample information is rapidly obtained in real time.

Description

Technical Field

[0001] The invention belongs to the field of optical technology and relates to a novel wide energy spectrum monochromator and a use method thereof. Background Art

[0002] X-rays are one of the three major discoveries in physics in the 19th century. Its application has brought revolutionary changes to scientific research in various fields such as physics, materials science, and chemistry. With the continuous development of light source technology, the combined application of multiple experimental methods has become an important development direction. Different energies and different experimental techniques can provide sample structure information from multiple angles. Therefore, more and more important sample systems require low-energy, medium-energy to high-energy experimental methods to obtain important structural information in real time and quickly. Monochromators are important equipment in experiments with synchrotron radiation sources and laboratory light sources. They are responsible for obtaining monochromatic beams of specific energy required for experiments. Different types of monochromators are used in different energy ranges. Generally, gratings, multilayer films, double crystal monochromators, and Laue bent crystal monochromators are used from low energy to high energy.

[0003] Among them, the grating monochromator is generally composed of a grating and a reflector to ensure the stability of the output light path during energy adjustment; the traditional Laue bent crystal monochromator is generally composed of two sets of bent crystal bending mechanisms, and the bending system and output height adjustment mechanism are very complicated.

[0004] Currently, when using different monochromators to obtain monochromatic light of specific energy required for different experiments, it is necessary to go to beam lines and experimental stations with different energies, or switch different monochromators on the same beam line. The optical path adjustment and optimization takes a considerable amount of time and cannot meet the needs of fast and effective in-situ measurement of samples. Summary of the invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a novel wide energy spectrum monochromator and a method of using the same, which can perform in-situ experiments at different energies, different experimental techniques, and multiple angles, provide sample structure information in real time and quickly, and realize the combined application of multiple experimental methods. The present invention solves the problem that when different monochromators are used to obtain monochromatic light of specific energy required by different experiments, it is necessary to go to beam lines and experimental stations with different energies, or switch different monochromators on the same beam line, and the optical path adjustment and optimization take a considerable time, which cannot meet the needs of fast and effective in-situ measurement of samples.

[0006] The present invention uses a multilayer film to replace the traditional grating in the low energy region (1keV-3keV) to increase the flux of the outgoing light. It can also form a double multilayer film monochromator by placing two multilayer films to simulate a double crystal monochromator, and achieve fixed output height through translation and energy change through rotation. In the medium energy range (2.5keV-75keV), a double flat crystal monochromator is used, wherein 2.5keV-42keV uses Si (111) crystal plane, and 40-75keV uses Si (311) crystal plane. In the high energy region (70keV-100keV), a componentized double Laue bent crystal monochromator is used. (Reference application number "2024104990131", name "A new type of componentized double Laue bent crystal monochromator and its dimming method"). Based on the technical realization of replacing the grating with a multilayer film and the invention and production of componentized molded Laue bent crystals, each part of the monochromator can be placed and adjusted in the manner of a double crystal monochromator. Therefore, a set of posture adjustment mechanisms can be used to integrate double multilayer film monochromators, double crystal monochromators, and componentized double Laue bent crystal monochromators to achieve full coverage from low energy to high energy regions, while ensuring high fixation to obtain a stable light spot, enabling different experiments to be carried out in situ and sample information to be acquired quickly and in real time.

[0007] The present invention utilizes a double multilayer monochromator to replace a grating in a low-energy region, and a componentized double Laue bent crystal in a high-energy region, and utilizes a set of posture adjustment mechanisms to integrate the double multilayer monochromator, the double crystal monochromator, and the componentized double Laue bent crystal monochromator, thereby achieving full coverage from low energy to high energy regions, while ensuring that the output height is fixed, obtaining a stable light spot, realizing different experiments in situ, and acquiring sample information in real time and quickly.

[0008] The technical solution of the present invention is:

[0009] A novel wide energy spectrum monochromator, characterized in that it comprises a posture adjustment mechanism, on which a double multilayer film monochromator, a first double crystal monochromator, a second double crystal monochromator, and a componentized double Laue bent crystal monochromator are horizontally arranged;

[0010] The double multilayer monochromator includes two multilayer films, and the two multilayer films are arranged and adjusted in the manner of a double crystal monochromator, wherein one multilayer film corresponds to one crystal of the double crystal monochromator, and the other multilayer film corresponds to the second crystal of the double crystal monochromator;

[0011] The posture adjustment mechanism is used to switch and select the double multilayer film monochromator, the first double crystal monochromator, the second double crystal monochromator or the componentized double Laue bent crystal monochromator according to the energy region where the required monochromatic light is located;

[0012] The double multilayer monochromator is used to work in a low energy region, and the energy of the monochromatic light output by the double multilayer monochromator is changed by rotating the two multilayer films;

[0013] The first double-crystal monochromator and the second double-crystal monochromator are used to work in different energy zones in the medium energy region, and the energy of monochromatic light output by the first double-crystal monochromator and the second double-crystal monochromator is changed by rotating the double crystals in the first double-crystal monochromator and the second double-crystal monochromator;

[0014] The componentized double Laue bent crystal monochromator is used to work in a high energy region, and the energy of monochromatic light output by the componentized double Laue bent crystal monochromator is changed by rotating two Laue bent crystals in the componentized double Laue bent crystal monochromator.

[0015] Furthermore, the design of the multilayer film follows the Bragg formula 2d sinθ=kλ; wherein θ is the incident angle of the target energy monochromatic light, d is the film thickness of the multilayer film, λ is the wavelength of the target energy monochromatic light, and k is the diffraction order; the height adjustment method of the multilayer film monochromator follows the formula Where D is the horizontal distance between the two multilayer films, and H is the height.

[0016] Furthermore, the first double crystal monochromator is a Si (111) double crystal monochromator, and the second double crystal monochromator is a Si (311) double crystal monochromator; the double multilayer film monochromator is used to work in the 1keV to 3keV region, the Si (111) double crystal monochromator is used to work in the 2.5keV-42keV region, the Si (311) double crystal monochromator is used to work in the 40keV-75keV region, and the componentized double Laue bent crystal monochromator is used to work in the 70keV-100keV region.

[0017] Furthermore, the posture adjustment mechanism selects the double multilayer film monochromator, Si(111) double crystal monochromator, Si(311) double crystal monochromator or componentized double Laue bent crystal monochromator through horizontal displacement switching according to the energy region of the required monochromatic light.

[0018] A method for using the novel wide energy spectrum monochromator comprises the following steps:

[0019] 1) According to the required monochromatic light energy zone, the double multilayer monochromator, Si(111) double crystal monochromator, Si

[0020] (311) a double crystal monochromator or a componentized double Laue bent crystal monochromator is switched to select a monochromator as a working monochromator;

[0021] 2) rotating the working monochromator so that it outputs monochromatic light of target energy;

[0022] 3) Adjusting the double crystal spacing in the working monochromator so that the working monochromator outputs a target energy monochromatic light with a set high height H.

[0023] The advantages of the present invention are as follows:

[0024] The present invention uses a set of posture adjustment mechanisms to integrate a double multilayer film monochromator, a double crystal monochromator, and a componentized double Laue bent crystal monochromator to achieve full coverage from low energy to high energy areas, conduct different experiments in situ, and obtain sample information in real time and quickly. At the same time, it can ensure that the output height is fixed and a stable light spot is obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the arrangement of two multilayer films in a double multilayer monochromator.

[0026] Figure 2 Schematic diagram of the arrangement of a double-crystal monochromator.

[0027] Figure 3 Schematic diagram of the arrangement of the componentized double Laue bent crystal monochromator.

[0028] Figure 4 The figure is a flow chart of the method for using the present invention. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention but not to limit the scope of the present invention.

[0030] 1. Design of a componentized double Laue bent crystal monochromator: refer to the Chinese patent document with application number "2024104990131" and name "A new componentized double Laue bent crystal monochromator and its dimming method".

[0031] 2. Design of double crystal monochromator and double multilayer monochromator: The design of multilayer in double crystal monochromator and double multilayer monochromator is the same as the traditional method, following the Bragg formula 2d sinθ=kλ, where θ is the Bragg angle, which is also the incident angle of the target energy monochromatic light; d is the crystal plane spacing or the film thickness of the multilayer, λ is the wavelength, and k is the diffraction order; the height adjustment method follows the formula Where D is the horizontal distance between two crystals or multilayer films, and H is the exit height, that is, the height difference between the incident light and the exit light, that is, the vertical distance between the two crystals or multilayer films.

[0032] 3. Integration using a set of posture adjustment mechanisms: Four sets of monochromators are arranged horizontally, sharing a set of posture adjustment mechanisms, and switched by horizontal displacement. Each monochromator selects energy by rotation, and the angle range of the posture adjustment mechanism must cover the union of the angle ranges of each monochromator. Each monochromator is fixed in height by adjusting the distance between two crystals or multilayer films while adjusting the incident angle, so a set of posture adjustment mechanisms can be used for adjustment. After horizontal switching, the angle and distance can be adjusted to obtain stable monochromatic light of different energies.

[0033] 4. Method of use: The method of use of the present invention is as follows Figure 4 As shown, the steps include:

[0034] 1) According to the energy region of the required monochromatic light, a double multilayer film monochromator, a Si(111) double crystal monochromator, a Si(311) double crystal monochromator or a componentized double Laue bent crystal monochromator is switched through a posture adjustment mechanism to select a monochromator as a working monochromator;

[0035] 2) rotating the working monochromator so that it outputs monochromatic light of target energy;

[0036] 3) Adjusting the double crystal spacing in the working monochromator so that the working monochromator outputs a target energy monochromatic light with a set high height H.

[0037] Although the specific embodiments of the present invention are disclosed for the purpose of illustration, the purpose is to help understand the content of the present invention and implement it accordingly, those skilled in the art will understand that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the present invention should not be limited to the content disclosed in the best embodiment, and the scope of the present invention is subject to the scope defined in the claims.

Claims

1. A novel wide energy spectrum monochromator, characterized in that: It comprises a posture adjustment mechanism, on which a double multilayer film monochromator, a first double crystal monochromator, a second double crystal monochromator, and a componentized double Laue bent crystal monochromator are horizontally arranged; The double multilayer monochromator includes two multilayer films, and the two multilayer films are arranged and adjusted in the manner of a double crystal monochromator, wherein one multilayer film corresponds to one crystal of the double crystal monochromator, and the other multilayer film corresponds to the second crystal of the double crystal monochromator; The posture adjustment mechanism is used to switch and select the double multilayer film monochromator, the first double crystal monochromator, the second double crystal monochromator or the componentized double Laue bent crystal monochromator according to the energy region where the required monochromatic light is located; The double multilayer monochromator is used to work in a low energy region, and the energy of the monochromatic light output by the double multilayer monochromator is changed by rotating the two multilayer films; The first double-crystal monochromator and the second double-crystal monochromator are used to work in different energy zones in the medium energy region, and the energy of monochromatic light output by the first double-crystal monochromator and the second double-crystal monochromator is changed by rotating the double crystals in the first double-crystal monochromator and the second double-crystal monochromator; The componentized double Laue bent crystal monochromator is used to work in a high energy region, and the energy of monochromatic light output by the componentized double Laue bent crystal monochromator is changed by rotating two Laue bent crystals in the componentized double Laue bent crystal monochromator.

2. The novel wide energy spectrum monochromator according to claim 1, characterized in that: The design of the multilayer film follows the Bragg formula 2d sinθ=kλ; wherein θ is the incident angle of the target energy monochromatic light, d is the film thickness of the multilayer film, λ is the wavelength of the target energy monochromatic light, and k is the diffraction order; the height adjustment method of the multilayer film monochromator follows the formula Where D is the horizontal distance between the two multilayer films, and H is the height.

3. The novel wide energy spectrum monochromator according to claim 1, characterized in that: The first double crystal monochromator is a Si (111) double crystal monochromator, and the second double crystal monochromator is a Si (311) double crystal monochromator; the double multilayer film monochromator is used to work in the 1keV to 3keV region, the Si (111) double crystal monochromator is used to work in the 2.5keV-42keV region, the Si (311) double crystal monochromator is used to work in the 40keV-75keV region, and the componentized double Laue bent crystal monochromator is used to work in the 70keV-100keV region.

4. The novel wide energy spectrum monochromator according to claim 3, characterized in that: The posture adjustment mechanism selects the double multilayer film monochromator, Si (111) double crystal monochromator, Si (311) double crystal monochromator or componentized double Laue bent crystal monochromator through horizontal displacement switching according to the energy region where the required monochromatic light is located.

5. A method for using the novel wide energy spectrum monochromator according to claim 1, comprising the steps of: 1) According to the energy region of the required monochromatic light, a double multilayer film monochromator, a first double crystal monochromator, a second double crystal monochromator or a componentized double Laue bent crystal monochromator is switched through a posture adjustment mechanism to select a monochromator as a working monochromator; 2) rotating the working monochromator so that it outputs monochromatic light of target energy; 3) Adjusting the double crystal spacing in the working monochromator so that the working monochromator outputs a target energy monochromatic light with a set high height H.

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