A novel wide-energy-range monochromator and method of use thereof

Abstract

The application discloses a novel wide-energy spectrum monochromator and a use method thereof. The novel wide-energy spectrum monochromator comprises a posture adjusting mechanism, and a double multilayer film monochromator, a Si (111) double crystal monochromator, a Si (311) double crystal monochromator and a componentized double Laue bender monochromator are horizontally arranged on the posture adjusting mechanism. The double multilayer film monochromator comprises two multilayer films, and the two multilayer films are arranged and adjusted in 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 of the required monochromatic light. The double multilayer film monochromator works in a 1-3 keV region, the Si (111) double crystal monochromator works in a 2.5-42 keV region, the Si (311) double crystal monochromator works in a 40-75 keV region, and the componentized double Laue bender monochromator works in a 70-100 keV region. The application realizes full coverage from a low-energy region to a high-energy region, realizes different experiments in situ, and realizes real-time and rapid acquisition of sample information.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of optical technology, and relates to a novel wide-energy-spectrum monochromator and a use method thereof. BACKGROUND

[0002] X-ray is one of the three great discoveries in physics in the nineteenth century, and 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 various experimental methods has become an important development direction. Different energies and different experimental techniques can provide sample structure information from multiple angles, so more and more important sample systems need to obtain important structure information in real time and quickly through low-energy, medium-energy to high-energy experimental methods. The monochromator is an important device in the experiment of the synchrotron radiation light source and the laboratory light source, which is responsible for obtaining a monochromatic light beam of a specific energy required by the experiment. Different types of monochromators are used for different energy ranges, and generally, grating, multilayer film, double crystal monochromator and Laue bending crystal monochromator are used from low energy to high energy.

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

[0004] At present, when different monochromators are used to obtain monochromatic light of a specific energy required by different experiments, it is necessary to go to different energy beamlines and experimental stations, or to switch different monochromators on the same beamline. The light path adjustment and optimization need to occupy a considerable amount of time, which cannot meet the requirements of in-situ rapid and effective measurement of samples. SUMMARY

[0005] In view of the problems in the prior art, the purpose of the present application is to provide a novel wide-energy-spectrum monochromator and a use method thereof, which can perform in-situ experiments at different energies, different experimental techniques and multiple angles, and provide sample structure information in real time and quickly, and realize the combined application of various experimental methods. The present application solves the problem that when different monochromators are used to obtain monochromatic light of a specific energy required by different experiments, it is necessary to go to different energy beamlines and experimental stations, or to switch different monochromators on the same beamline. The light path adjustment and optimization need to occupy a considerable amount of time, which cannot meet the requirements of in-situ rapid and effective measurement of samples.

[0006] The application uses a multilayer film to replace a traditional grating in a low-energy region (1keV-3keV), improves the flux of the outgoing light, and can form a double multilayer film monochromator by placing two multilayer films in a way similar to a double crystal monochromator, realizes fixed output by translation, and realizes energy change by rotation. In a medium-energy section (2.5keV-75keV), a double flat crystal monochromator is used, in which a Si (111) crystal surface is used in the range of 2.5keV-42keV, and a Si (311) crystal surface is used in the range of 40-75keV. In a high-energy region (70keV-100keV), a componentized double Laue bent crystal monochromator is used. (Refer to application number "2024104990131" and name "a new componentized double Laue bent crystal monochromator and a light adjusting method thereof"). Based on the realization of the technology of replacing a grating with a multilayer film and the invention of making a componentized Laue bent crystal, each part of the monochromator can be placed and adjusted in the way of a double crystal monochromator. Therefore, a set of pose adjusting mechanism can be used to integrate the double multilayer film monochromator, the double crystal monochromator and the componentized double Laue bent crystal monochromator, realize full coverage from low energy to high energy region, ensure fixed output, obtain stable light spots, realize different experiments in situ, and obtain sample information in real time and quickly.

[0007] The application uses a double multilayer film monochromator to replace a grating in a low-energy region, uses a componentized double Laue bent crystal in a high-energy region, and uses a set of pose adjusting mechanism to integrate the double multilayer film monochromator, the double crystal monochromator and the componentized double Laue bent crystal monochromator, realize full coverage from low energy to high energy region, ensure fixed output, obtain stable light spots, realize different experiments in situ, and obtain sample information in real time and quickly.

[0008] The technical scheme of the application is as follows:

[0009] A new wide-energy spectrum monochromator, characterized in that a pose adjusting mechanism is arranged, and a double multilayer film monochromator, a first double crystal monochromator, a second double crystal monochromator and a componentized double Laue bent crystal monochromator are arranged horizontally on the pose adjusting mechanism.

[0010] The double multilayer film monochromator comprises two multilayer films, and the two multilayer films are placed and adjusted in the way of a double crystal monochromator, one of the multilayer films corresponds to a crystal of the double crystal monochromator, and the other multilayer film corresponds to a second crystal of the double crystal monochromator.

[0011] The pose adjusting mechanism is used for switching and selecting 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 film monochromator is used for working in a low-energy region, and the energy of the monochromatic light output by the double multilayer film monochromator is changed by rotating the two multilayer films.

[0013] The first and second dual-crystal monochromators are used to operate in different energy regions of the medium energy range. The monochromatic light energy output by the first and second dual-crystal monochromators can be changed by rotating the dual crystals in the first and second dual-crystal monochromators.

[0014] The modular double Laue bent crystal monochromator is used to operate in the high-energy region. The monochromatic light energy output by the modular double Laue bent crystal monochromator is changed by rotating the two Laue bent crystals in the modular double Laue bent crystal monochromator.

[0015] Furthermore, the design of the multilayer film follows Bragg's formula 2d sinθ=kλ; where 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 output 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 exit height.

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

[0017] Furthermore, the attitude adjustment mechanism selects the dual multilayer monochromator, Si(111) dual crystal monochromator, Si(311) dual crystal monochromator or modular dual Laue bent crystal monochromator by switching horizontal displacement according to the energy region where the required monochromatic light is located.

[0018] A method of using the novel wide-spectrum monochromator includes the following steps:

[0019] 1) Based on the energy region of the required monochromatic light, the attitude adjustment mechanism is used to adjust the double multilayer monochromator, Si(111) double crystal monochromator, and Si...

[0020] (311) A dual-crystal monochromator or a modular dual Laue bent crystal monochromator is switched to select one monochromator as the working monochromator.

[0021] 2) Rotate the working monochromator to output monochromatic light of the target energy;

[0022] 3) Adjust the spacing between the two crystals in the working monochromator so that the working monochromator outputs target energy monochromatic light at a set height H.

[0023] The advantages of this invention are as follows:

[0024] The application integrates double multilayer film monochromator, double crystal monochromator and componentized double Laue bending crystal monochromator by using a set of posture adjusting mechanism, realizes full coverage from low energy to high energy area, in-situ different experiments, and real-time and rapid acquisition of sample information. Meanwhile, high fixedness can be ensured, and stable light spots can be obtained. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic diagram of the placement mode of two multilayer films in the double multilayer film monochromator.

[0026] Figure 2 It is a schematic diagram of the placement mode of the double crystal monochromator.

[0027] Figure 3 It is a schematic diagram of the placement mode of the componentized double Laue bending crystal monochromator.

[0028] Figure 4 It is a flowchart of the use method of the application. DETAILED DESCRIPTION

[0029] The application will be further described in detail below with reference to the drawings. The examples are only used to explain the application, and are not used to limit the scope of the application.

[0030] 1. Design of componentized double Laue bending crystal monochromator: refer to the Chinese patent document with application number “2024104990131” and name “a new componentized double Laue bending crystal monochromator and light adjusting method thereof”.

[0031] 2. Design of double crystal monochromator and double multilayer film monochromator: the design of the multilayer film in the double crystal monochromator and the double multilayer film monochromator does not change from the traditional way, and follows the Bragg formula 2d sinθ=kλ, wherein θ is the Bragg angle, which is also the incident angle of the target energy monochromatic light; d is the interplanar spacing or the film thickness of the multilayer film, λ is the wavelength, and k is the diffraction order; the height adjustment mode follows the formula wherein D is the horizontal distance of the two crystals or the multilayer film, and H is the height of the exit, that is, the height difference between the incident light and the exit light, that is, the vertical distance of the two crystals or the multilayer film.

[0032] 3. Integration by using a set of posture adjusting mechanism: four groups of monochromators are arranged horizontally, and share a set of posture adjusting mechanism, which is switched by horizontal displacement. Each monochromator selects energy by rotating, and the rotation angle range of the posture adjusting mechanism needs to cover the union set of the rotation angle ranges of each monochromator. Each monochromator fixes the height by adjusting the distance of the two crystals or the multilayer film while adjusting the incident angle, so a set of posture adjusting mechanism can be used for adjustment, and the angle and distance are adjusted after horizontal switching to obtain stable monochromatic light of different energies.

[0033] 4. Use method, the use method flow of the application is as shown in Figure 4 The steps include:

[0034] 1) Switching and selecting a monochromator as a working monochromator by adjusting the posture mechanism according to the energy region of the required monochromatic light, the working monochromator being a double multilayer film monochromator, a Si(111) double crystal monochromator, a Si(311) double crystal monochromator or a componentized double Laue zone crystal monochromator;

[0035] 2) Rotating the working monochromator to output monochromatic light of a target energy;

[0036] 3) Adjusting the double crystal spacing in the working monochromator to make the working monochromator output monochromatic light of a target energy with a set high height H.

[0037] Although the specific embodiments of the application are disclosed for the purpose of illustrating the present application and helping to understand the content of the application and to implement the same, it can be understood by those skilled in the art that various substitutions, changes and modifications are possible without departing from the spirit and scope of the application and the appended claims. Therefore, the application should not be limited to the disclosed content of the best mode of implementation, and the scope of the application claimed is defined by the scope of the claims.

Claims

1. A novel wide-energy-range monochromator, characterized in that, The adjusting mechanism is used for switching and selecting 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 of the required monochromatic light. The double multilayer film monochromator comprises two multilayer films which are arranged and adjusted in the manner of the double crystal monochromator, one of the two multilayer films corresponding to the first crystal of the double crystal monochromator and the other corresponding to the second crystal of the double crystal monochromator. The adjusting mechanism is used for switching and selecting 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 of the required monochromatic light. The double multilayer film monochromator is used for working in a low energy region, and the energy of the monochromatic light output by the double multilayer film monochromator is changed by rotating the two multilayer films. The first double crystal monochromator and the second double crystal monochromator are used for working in different energy regions of a medium energy region, and the energy of the 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 for working in a high energy region, and the energy of the monochromatic light output by the componentized double Laue bent crystal monochromator is changed by rotating the two Laue bent crystals in the componentized double Laue bent crystal monochromator. The first double crystal monochromator is a Si(111) double crystal monochromator, the second double crystal monochromator is a Si(311) double crystal monochromator, the double multilayer film monochromator is used for working in a 1keV-3keV region, the Si(111) double crystal monochromator is used for working in a 2.5keV-42keV region, the Si(311) double crystal monochromator is used for working in a 40keV-75keV region, and the componentized double Laue bent crystal monochromator is used for working in a 70keV-100keV region.

2. The novel wide energy band 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 layer thickness of the multilayer film, λ is the wavelength of the target energy monochromatic light, and k is the diffraction order; and the out-height adjustment mode of the multilayer film monochromator follows the formula wherein D is the horizontal distance of the two multilayer films, and H is the out-height.

3. The novel wide energy band monochromator according to claim 1, characterized in that, The adjusting mechanism switches and selects the double multilayer film monochromator, the Si(111) double crystal monochromator, the Si(311) double crystal monochromator or the componentized double Laue bent crystal monochromator by horizontal displacement according to the energy region of the required monochromatic light.

4. A method for using the novel wide energy spectrum monochromator of claim 1, comprising the following steps: 1) switching and selecting a monochromator as a working monochromator according to the energy region of the required monochromatic light by the adjusting mechanism on the double multilayer film monochromator, the first double crystal monochromator, the second double crystal monochromator or the componentized double Laue bent crystal monochromator; 2) rotating the working monochromator to output monochromatic light of a target energy; 3) adjusting the distance between the double crystals in the working monochromator to output monochromatic light of a target energy with a set height H.

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