Device for rotating around Rowland circle angle

Abstract

The utility model discloses a device capable of rotating around a Rowland circle angle. An X-ray source, a bent crystal and a detector meet the Rowland circle position relation. The X-axis translation device is installed on the optical platform, the Y-axis translation device is installed on a slewing bearing of the X-axis translation device, the collimation device is installed at the bottom of the front end of the Y-axis translation device, a slewing bearing in the collimation device is installed on the V-axis translation device, the V-axis translation device is installed on the optical platform, and the optical platform is installed on the optical platform. And the W-axis rotating device is arranged on a bearing base plate in the collimating device. The detector is installed on the Y-axis translation device, the bent crystal is installed on the W-axis rotation device, and the X-ray source is installed on the optical platform. And the helium chamber device is positioned among the X-ray source, the detector and the bent crystal and is mounted on the optical platform. The device has the advantages that the device is used for supplementing and extending a synchrotron radiation test, is between an X-ray fluorescence spectrophotometer and the synchrotron radiation test, and expands research means.

Description

Technical Field

[0001] The utility model relates to a rotating device, in particular to a rotating device around a Rowland circle angle. Background Art

[0002] In the field of materials science and engineering, XAFS (X-ray absorption fine structure spectroscopy) and XES (X-ray emission spectroscopy) methods have become an important characterization method for studying the local atomic and electronic structure of materials. They are indispensable in cutting-edge research fields such as graphene, carbon nanotubes, semiconductor chips, and condensed matter physics.

[0003] In order to meet the domestic demand for cutting-edge large-scale instruments, it is urgently necessary to develop a laboratory X-ray absorption fine structure spectrometer and an X-ray emission spectrometer to meet the current market requirements for XAFS and XES detection. Summary of the invention

[0004] The Rowland circle was discovered by physicist Henry A. Rowland in the early 1880s. Rowland found that if the slit light source and the concave grating are placed on a circle with a diameter equal to the radius of curvature of the concave grating, and the circle is tangent to the grating midpoint G, then the spectrum formed by the concave grating appears on this circle. Because Rowland was the first to discover it, the circle is called the Rowland circle.

[0005] The utility model uses the Rowland circle principle, aims at the current situation that the domestic market is restricted by foreign equipment and more and more XAFS and XES are used, and develops and designs a device rotating around the Rowland circle angle to meet the current detection requirements in the field of material engineering.

[0006] The technical solution adopted by the utility model is:

[0007] A device for rotating around a Rowland circle angle comprises an X-axis translation device, a Y-axis translation device, a V-axis translation device and a W-axis rotation device; the X-axis translation device is installed on an optical platform, the Y-axis translation device is installed on a slewing bearing of the X-axis translation device, a collimating device is installed at the front end bottom of the Y-axis translation device, the slewing bearing in the collimating device is installed on the V-axis translation device, the V-axis translation device is installed on the optical platform, and the W-axis rotation device is installed on the bearing pad in the collimating device; a detector is installed on the Y-axis translation device, a curved crystal is installed on the W-axis rotation device, an X-ray source is installed on the optical platform, and the X-ray source, the curved crystal and the detector meet the Rowland circle position relationship; a sample device to be tested is installed on the Y-axis translation device and at the front end of the detector; a helium gas chamber device is located between the X-ray source, the detector and the curved crystal and is installed on the optical platform.

[0008] The collimation device is composed of a positioning sleeve, a linear shaft, a linear bearing, a rotating plate, a slewing bearing, and a bearing pad; the positioning sleeve is fixed on the Y-axis translation device; the outer side of the linear shaft is fixed to the positioning sleeve, the inner side of the linear shaft is installed inside the linear bearing, the rotating plate is installed on the linear bearing, the lower end of the rotating plate is installed on the outer ring of the slewing bearing, and the inner ring of the slewing bearing is fixed on the V-axis translation device; the rotating plate can rotate together with the outer ring of the slewing bearing; the bearing pad is installed on the inner ring of the slewing bearing; the collimation device adopts the linear shaft and the linear bearing to slide in cooperation, so that when the linkage mechanism moves, it is ensured that the window of the detector is always facing the center of the curved crystal.

[0009] The position of the X-ray source is fixed; the movement trajectory of the X-ray source, the curved crystal and the detector is always on a Rowland circle with a diameter of 2R, and the position of the Rowland circle, that is, the difference between the center of the circle and the Bragg angle, is constantly changing; the diameter 2R of the Rowland circle where the movement trajectory of the X-ray source, the curved crystal and the detector is located is equal to the curvature radius of the curved crystal, and the curvature radius of the curved crystal can be customized.

[0010] When the Bragg angle changes, the linkage mechanism is automatically controlled by the program so that the angle θ1 between the incident ray and the curved crystal is always equal to the angle θ2 between the outgoing ray and the curved crystal, that is, θ1=θ2. The device can meet the detection range of 55-85 degrees.

[0011] The X-axis translation device, Y-axis translation device, and V-axis translation device have the same structure but different travels. The transmission method is ball screw transmission; the W-axis rotation device is worm gear transmission; the four devices are all precision driven by servo motors.

[0012] The helium gas chamber device is a sealed chamber which can be filled with helium.

[0013] The utility model has the following beneficial effects and advantages:

[0014] 1. This device is a supplement and extension of synchrotron radiation experiments, between X-ray fluorescence spectrometer and synchrotron radiation experiments, expanding research methods. It uses CBCA crystal technology to achieve X-ray monochromatic scanning;

[0015] 2. As a new type of instrument, it expands the means of research and analysis of various materials. Users can conduct research in the laboratory. It is widely used in various material research and analysis including nanomaterials, semiconductor materials, catalytic materials, biomaterials, military special materials, mineral analysis, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the position diagram of the linkage mechanism of the utility model;

[0017] Figure 2 This is a diagram showing the location of the helium gas chamber device;

[0018] Figure 3 This is the position diagram when the Bragg angle is 65 degrees;

[0019] Figure 4 This is the position diagram when the Bragg angle is 85 degrees;

[0020] Figure 5 This is the Roland schematic diagram when the Bragg angle is 65 degrees;

[0021] Figure 6 This is the Roland schematic diagram when the Bragg angle is 85 degrees;

[0022] Figure 7 This is the motion position diagram of the device;

[0023] Figure 8-1 Figure 1 is a diagram of the collimation device;

[0024] Figure 8-2 for Figure 8-1 A top view of

[0025] Fig. 9 is the position diagram of the collimation device;

[0026] Figure 10-1 This is a diagram of the X-axis translation device;

[0027] Figure 10-2 for Figure 10-1 A top view of

[0028] Fig.11 It is a curved crystal diagram;

[0029] Fig.12 This is a diagram of the helium gas chamber device;

[0030] Among them, 1 is an X-axis translation device, 101 is a slewing bearing, 102 is a servo motor; 2 is an optical platform; 3 is a Y-axis translation device; 4 is a collimation device, 401 is a positioning sleeve, 402 is a linear axis, 403 is a linear bearing, 404 is a rotating plate, 405 is a slewing bearing, and 406 is a bearing pad; 5 is a V-axis translation device; 6 is a W-axis rotation device; 7 is a detector; 8 is a bending crystal; 9 is an X-ray source; 10 is a helium gas chamber device; 11 is a sample device to be tested. DETAILED DESCRIPTION

[0031] The utility model will be further described below in conjunction with the accompanying drawings of the specification.

[0032] like Figures 1 to 4As shown, the horizontal movement of the X-axis translation device 1, the Y-axis translation device 3, and the V-axis translation device 5 and the rotation of the W-axis rotation device 6 realize that the X-ray source 9, the curved crystal 8, and the detector 7 meet the Rowland circle position relationship. The X-axis translation device 1 is installed on the optical platform 2, the Y-axis translation device 3 is installed on the slewing bearing 101 of the X-axis translation device 1, the collimation device 4 is installed at the bottom of the front end of the Y-axis translation device 3, the slewing bearing 405 in the collimation device 4 is installed on the V-axis translation device 5, the V-axis translation device 5 is installed on the optical platform 2, and the W-axis rotation device 6 is installed on the bearing pad 406 in the collimation device 4. The detector 7 is installed on the Y-axis translation device 3, the curved crystal 8 is installed on the W-axis rotation device 6, and the X-ray source 9 is installed on the optical platform 2. The helium gas chamber device 10 is located between the X-ray source 9, the detector 7 and the curved crystal 8, and is installed on the optical platform 2. The sample device 11 to be tested is installed on the Y-axis translation device 3 and the front end of the detector 7.

[0033] like Figures 5 to 7 As shown, the X-ray source 9 is fixed in position, and the linkage mechanism is automatically controlled by a program to ensure that the motion trajectories of the X-ray source 9, the curved crystal 8 and the detector 7 are always on a Rowland circle with a diameter of 2R, and the position of the Rowland circle, i.e., the center of the circle, is constantly changing due to the difference in the Bragg angle;

[0034] like Figures 5-6 As shown, according to the Rowland circle principle, the diameter 2R of the Rowland circle where the motion trajectories of the X-ray source 9, the curved crystal 8 and the detector 7 are located is equal to the curvature radius of the curved crystal 8, and the curvature radius of the curved crystal 8 can be customized;

[0035] like Figures 5-6 As shown, when the Bragg angle changes, the linkage mechanism is automatically controlled by the program so that the distance from the center of the X-ray source 9 to the curved crystal 8 is always equal to the distance from the curved crystal 8 to the detector 7, that is, L1 = L2 = 2Rsinθ;

[0036] like Figures 5-6 As shown, when the Bragg angle changes, the linkage mechanism is automatically controlled by the program so that the angle between the incident ray and the curved crystal 8 is always equal to the angle between the outgoing ray and the curved crystal 8, that is, θ1=θ2. The device can meet the detection range of 65-85 degrees.

[0037] like Figure 8-1 , Figure 8-2 and Fig. 9As shown, the collimating device 4 is composed of a positioning sleeve 401, a linear shaft 402, a linear bearing 403, a rotating plate 404, a slewing bearing 405, and a bearing pad 406. The positioning sleeve 401 is fixed on the outside of the linear shaft 402, and the linear shaft 402 is installed inside the linear bearing 403 and can slide inside the linear bearing 403. The rotating plate 404 is installed on the linear bearing 403, and the lower end of the rotating plate 404 is installed on the outer ring of the slewing bearing 405. The inner ring of the slewing bearing 405 is fixed, and the rotating plate 404 can rotate together with the outer ring of the slewing bearing 405, thereby driving the linear bearing 403 to slide on the linear shaft 402, and the bearing pad 406 is installed on the inner ring of the slewing bearing 405. The collimating device 4 adopts the linear shaft 402 and the linear bearing 403 to slide in cooperation, so that when the linkage mechanism moves, it is ensured that the window of the detector 7 is always facing the center of the curved crystal 8.

[0038] like Figure 10-1 and Figure 10-2 As shown, the transmission mode of the X-axis translation device 1 is ball screw transmission. The servo motor 102 drives the screw to rotate, and the screw drives the slide to move. The slide is provided with a slewing bearing 101;

[0039] The Y-axis translation device 3 and the V-axis translation device 5 have the same structure as the X-axis translation device 1, but different travels; the W-axis rotation device 6 is a worm gear transmission. These four devices are all precision driven by servo motors and belong to common transmission devices, so they will not be described in detail.

[0040] The program automatic control linkage mechanism mentioned above means that the drive and motion trajectory of each of the above-mentioned servo motors are controlled by a control chip, and the control chip judges and controls whether the rotation of each servo motor can ensure that the driven components are in a predetermined position. This is common knowledge in the art.

[0041] like Fig.12 As shown, the helium gas chamber device 10 is a sealed chamber that can be filled with helium. Due to the unique physical properties of helium, the device is beneficial to reducing X-ray energy loss.

[0042] like Figure 7 As shown, the movement directions of each axis of the entire device from 55 degrees to 85 degrees, the X-axis translation device 1 moves toward the X-ray source 9, the Y-axis translation device 3 moves toward the curved crystal 8, the Z-axis translation device 5 moves away from the X-ray source 9, and the curved crystal 8 rotates counterclockwise.

Claims

1. A device for rotating around a Rowland circle angle, characterized in that: It comprises an X-axis translation device, a Y-axis translation device, a V-axis translation device and a W-axis rotation device; the X-axis translation device is installed on the optical platform, the Y-axis translation device is installed on the slewing bearing of the X-axis translation device, the collimation device is installed at the front end bottom of the Y-axis translation device, the slewing bearing in the collimation device is installed on the V-axis translation device, the V-axis translation device is installed on the optical platform, and the W-axis rotation device is installed on the bearing pad in the collimation device; the detector is installed on the Y-axis translation device, the curved crystal is installed on the W-axis rotation device, the X-ray source is installed on the optical platform, and the X-ray source, the curved crystal and the detector meet the Rowland circle position relationship; the sample device to be tested is installed on the Y-axis translation device and the front end of the detector; the helium gas chamber device is located between the X-ray source, the detector and the curved crystal, and is installed on the optical platform; The collimation device is composed of a positioning sleeve, a linear shaft, a linear bearing, a rotating plate, a slewing bearing, and a bearing pad; the positioning sleeve is fixed on the Y-axis translation device; the outer side of the linear shaft is fixed to the positioning sleeve, the inner side of the linear shaft is installed inside the linear bearing, the rotating plate is installed on the linear bearing, the lower end of the rotating plate is installed on the outer ring of the slewing bearing, and the inner ring of the slewing bearing is fixed on the V-axis translation device; the rotating plate can rotate together with the outer ring of the slewing bearing; the bearing pad is installed on the inner ring of the slewing bearing; the collimation device adopts the linear shaft and the linear bearing to slide in cooperation, so that when the linkage mechanism moves, it is ensured that the window of the detector is always facing the center of the curved crystal.

2. The device for rotating around a Rowland circle angle according to claim 1, characterized in that: The position of the X-ray source is fixed; the movement trajectory of the X-ray source, the curved crystal and the detector is always on a Rowland circle with a diameter of 2R, and the position of the Rowland circle, that is, the difference between the center of the circle and the Bragg angle, is constantly changing; the diameter 2R of the Rowland circle where the movement trajectory of the X-ray source, the curved crystal and the detector is located is equal to the curvature radius of the curved crystal, and the curvature radius of the curved crystal can be customized.

3. The device for rotating around a Rowland circle angle according to claim 1, characterized in that: When the Bragg angle changes, the linkage mechanism is automatically controlled by the program so that the angle θ1 between the incident ray and the curved crystal is always equal to the angle θ2 between the outgoing ray and the curved crystal, that is, θ1=θ2. The device can meet the detection range of 55-85 degrees.

4. The device for rotating around a Rowland circle angle according to claim 1, characterized in that: The X-axis translation device, Y-axis translation device, and V-axis translation device have the same structure but different travels. The transmission method is ball screw transmission; the W-axis rotation device is worm gear transmission; the four devices are all precision driven by servo motors.

5. The device for rotating around a Rowland circle angle according to claim 1, characterized in that: The helium gas chamber device is a sealed chamber that can be filled with helium.

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