CN218036510U - X-ray fluorescence spectrometer - Google Patents
X-ray fluorescence spectrometer Download PDFInfo
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- CN218036510U CN218036510U CN202221575193.XU CN202221575193U CN218036510U CN 218036510 U CN218036510 U CN 218036510U CN 202221575193 U CN202221575193 U CN 202221575193U CN 218036510 U CN218036510 U CN 218036510U
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Abstract
The utility model provides an X ray fluorescence spectrum appearance, including X-ray tube, capillary, monochromator and detector, X-ray tube is used for launching X ray, X-ray tube locates the capillary entrance, the entry end diameter D of capillary in Is greater than the diameter D of the outlet end out The monochromator is arranged at the outlet end of the capillary tube, forms an included angle with a second direction along the thickness direction of the monochromator along a first direction of the axis of the capillary tube, and is used for converting the X-ray emitted from the outlet end of the capillary tube from a wide waveband into a narrow waveband; the detector is used for receiving a sample fluorescence signal generated by the sample under the action of the narrow-band X-rays, and compared with the prior art, the detector can be used for receiving a sample fluorescence signal generated by the action of the sample and the narrow-band X-raysReduce the curved brilliant size of hyperboloid, and then reduce the experiment degree of difficulty and reduce the error.
Description
Technical Field
The utility model relates to an atomic fluorescence analysis technical field, concretely relates to X ray fluorescence spectrum appearance.
Background
An X-ray Fluorescence Spectrometer (XRF Spectrometer for short) is a rapid and nondestructive substance measuring method. X-ray fluorescence (XRF) is a secondary X-ray that is excited when a material is bombarded with high-energy X-rays or gamma rays. This phenomenon is widely used for elemental analysis and chemical analysis.
The traditional principle diagram for measuring heavy metals is shown in figure 1, wherein 1 is an X-ray tube which emits X-rays; 2 is a hyperboloid monochromator for monochromating X-rays, typically using a lithium fluoride material; 3 is a tested sample; and 4, a detector. The X-ray emitted by the ray tube is a wide-spectrum X-ray, generally 0-50kev, is monochromated into X-ray with a target narrow bandwidth after passing through a monochromator, and excites the fluorescence of heavy metals after passing through a sample, and the fluorescence is received by a detector. The monochromator is generally in two modes of hyperboloid half focusing and hyperboloid full focusing. The bandwidth of the diffraction peak of the hyperboloid semi-focusing crystal is increased along with the increase of the size. The processing mode of the hyperboloid full focus mode is complicated, and the success rate is lower.
This method can only be used if the light passes through a monochromator. In order to improve the utilization rate of X-ray, the method needs a large-area crystal to achieve the effect of more photon diffraction, but the large-area monochromator is difficult to process, the processing precision is not high, and the assembly and debugging difficulty is very high.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model aims to solve the technical problem that the large tracts of land monochromator processing difficulty that adopts among the prior art among the traditional heavy metal measuring method, the machining precision is not high and the equipment debugging degree of difficulty is very big.
Therefore, the utility model provides an X-ray fluorescence spectrometer, include:
an X-ray tube for emitting X-rays;
a capillary tube having an inlet end diameter D in Is greater than the diameter D of the outlet end out， The X-ray tube is arranged at the inlet end of the capillary tube, and the capillary tube is used for converging the received X-rays;
the monochromator is arranged at the outlet end of the capillary tube, forms an included angle with a second direction along the thickness direction of the monochromator along a first direction of the axis of the capillary tube, and is used for converting the X-ray emitted from the outlet end of the capillary tube from a wide waveband into a narrow waveband and irradiating the narrow waveband on a sample arranged on one side of the monochromator;
a detector adapted to receive a sample fluorescence signal generated by the sample interacting with the narrow band of X-rays.
Optionally, the capillary is a tapered capillary.
Optionally, the inlet end diameter D in In the range of 8mm-12mm, the diameter D of the outlet end out The range is 4mm-6mm, and the range of the tube length is 80mm-90mm.
Optionally, the inlet end diameter D in Is 10mm, diameter D of outlet end out The diameter of the X-ray tube is 5mm, the length of the X-ray tube is 84mm, the X-ray tube is placed at the inlet end of the capillary tube by 48mm, and the monochromator is arranged at the outlet end of the capillary tube by 17mm.
Optionally, the X-ray tube emits X-rays greater than 25kev.
Optionally, an included angle between the first direction and the second direction is less than or equal to 8.87 degrees.
Optionally, an included angle between the first direction and the second direction is 6 degrees.
Optionally, the capillary tube is made of glass material.
Optionally, the monochromator is a hyperboloid curved crystal.
Optionally, the hyperboloidal curved crystal is a lithium fluoride material.
The technical scheme provided by the utility model, following advantage has:
1. the utility model provides a pair of X ray fluorescence spectrum appearance, including X-ray tube, capillary, monochromator and detector, X-ray tube is used for launching X ray, X-ray tube locates the capillary entrance, the entry end diameter D of capillary in Is greater than the diameter D of the outlet end out The monochromator is arranged at the outlet end of the capillary tube, forms an included angle with a second direction along the thickness direction of the monochromator along a first direction of the axis of the capillary tube, and is used for converting the X-ray emitted from the outlet end of the capillary tube from a wide waveband into a narrow waveband; the detector is used for receiving a sample fluorescence signal generated by the sample and the narrow-band X-ray.
The X-ray fluorescence spectrometer with the structure is provided with the capillary, the X-ray tube is arranged at the inlet of the capillary, and X-rays emitted by the X-ray tube enter the X-ray fluorescence spectrometer through the capillaryThe inlet end is injected from the outlet end and has a diameter D in Is greater than the diameter D of the outlet end out In order to realize assembling the X ray of receiving, because the width that the curved brilliant of hyperboloid was arrived in the capillary emergent light arrival hyperboloid has decided the curved brilliant size of hyperboloid, for example if parallel light diameter is 1mm, then the curved brilliant length of hyperboloid that needs is 6.5mm, consequently through assembling X ray, can reduce X ray to the diameter of the curved brilliant time X ray of hyperboloid, consequently, the curved brilliant size of hyperboloid is a lot less than traditional mode, because the curved brilliant size of hyperboloid is big more, its processing degree of difficulty and error all increase, consequently the utility model discloses can reduce the curved brilliant size of hyperboloid for prior art, and then reduce the experiment degree of difficulty and reduce the error.
2. The utility model provides a pair of X ray fluorescence spectrum appearance, the capillary adopts the toper capillary, X-ray tube locates capillary entrance and entry end diameter D in Is greater than the diameter D of the outlet end out 。
The X-ray fluorescence spectrometer with the structure is arranged at the inlet of the capillary tube through the X-ray tube, so that the light emitted by the X-ray tube can be received by the capillary tube as soon as possible, and the utilization rate of X-rays can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a light path for measuring heavy metals according to the prior art;
fig. 2 is a schematic optical path diagram of an X-ray fluorescence spectrometer provided in an embodiment of the present invention;
description of reference numerals:
1-an X-ray tube;
2-a capillary tube;
3-a monochromator;
4-sample;
5-detector.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Examples
As shown in FIG. 2, the utility model provides an X-ray fluorescence spectrometer, including X-ray tube 1, capillary 2, monochromator 3 and detector 5, X-ray tube 1 locates the 2 entrances of capillary, and X-ray tube 1 is used for launching X ray, and wherein, the X ray that X-ray tube 1 launched is greater than 25kev. X-rays emitted from the X-ray tube 1 enter through the inlet end of the capillary tube 2 and are emitted from the outlet end, and the diameter D of the inlet end of the capillary tube 2 in Is greater than the diameter D of the outlet end out Thereby converging the received X-rays.
Because the width that the curved brilliant width of hyperboloid was arrived in 2 emergent lights of capillary 2 has decided the curved brilliant size of hyperboloid, for example if parallel light diameter is 1mm, then the curved brilliant length of hyperboloid that needs is 6.5mm, consequently through assembling X ray, can reduce X ray to the diameter of the curved brilliant time X ray of hyperboloid, consequently the curved brilliant size of hyperboloid is a lot less than traditional mode, because the curved brilliant size of hyperboloid is big more, its processing degree of difficulty and error all increase, consequently the utility model discloses can reduce the curved brilliant size of hyperboloid for prior art, and then reduce the experiment degree of difficulty and reduce the error.
As shown in fig. 2, the monochromator 3 is disposed at the outlet end of the capillary tube 2, and the first direction along the axis of the capillary tube 2 and the second direction along the thickness direction of the monochromator 3 form an included angle, wherein the included angle between the first direction and the second direction is less than or equal to 8.87 degrees. The monochromator 3 is used for converting X-rays emitted from the outlet end of the capillary tube 2 from a wide waveband into a narrow waveband, irradiating the narrow waveband on a sample 4 arranged on one side of the monochromator 3, and measuring the X-rays which are generally required to be diffracted by heavy metals and are more than 25kev. The monochromator 3 is a hyperboloid curved crystal made of lithium fluoride material, and the diffraction efficiency of the hyperboloid curved crystal is higher than that of a plane crystal. The detector 5 is used for receiving a sample fluorescence signal generated by the sample 4 and the narrow-band X-ray.
Wherein, capillary 2 adopts the toper capillary, and the X ray that X-ray tube 1 launched enters the inner wall by capillary 2's macrostoma end and takes place the total reflection, is held out by capillary 2's osculum to can change the propagation direction of X ray, assemble the X ray of receiving, thereby can reduce the diameter of X ray when X ray bends the crystalline to the hyperboloid, with the curved brilliant size of reduction hyperboloid, and then reduce test error.
Wherein the inlet end diameter D in In the range of 8mm-12mm, the diameter D of the outlet end out The range is 4mm-6mm, and the range of the tube length is 80mm-90mm. An example of the X-ray fluorescence spectrometer provided in the example is given below, the diameter D of the inlet end of the tapered capillary tube in Is 10mm, the diameter D of the outlet end of the conical capillary out The diameter of the parallel light reaching the double-curved-surface curved crystal is 1mm, and the required length of the double-curved-surface curved crystal is 6.5mm. Double curveThe face bend crystal size is much smaller than in the conventional manner.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.
Claims (10)
1. An X-ray fluorescence spectrometer, comprising:
an X-ray tube (1) for emitting X-rays;
a capillary tube (2), the inlet end diameter D of the capillary tube (2) in Is greater than the diameter D of the outlet end out， The X-ray tube (1) is arranged at the inlet end of the capillary tube (2), and the capillary tube (2) is used for converging received X-rays;
the monochromator (3) is arranged at the outlet end of the capillary tube (2), and the monochromator (3) is arranged along a first direction of the axis of the capillary tube (2) and a second direction of the thickness direction of the monochromator (3) at an included angle and used for converting the X-ray emitted from the outlet end of the capillary tube (2) from a wide waveband into a narrow waveband and irradiating the narrow waveband on a sample (4) arranged on one side of the monochromator (3);
a detector (5), wherein the detector (5) is suitable for receiving a sample fluorescence signal generated by the sample (4) and the narrow-band X-ray.
2. The X-ray fluorescence spectrometer according to claim 1, characterized in that the capillary (2) is a tapered capillary.
3. The X-ray fluorescence spectrometer of claim 1, wherein the entrance end diameter D in In the range of 8mm-12mm, the diameter D of the outlet end out The range is 4mm-6mm, and the range of the tube length is 80mm-90mm.
4. The X-ray fluorescence spectrometer of claim 3, wherein the entrance end diameter D in Is 10mm, outlet end diameter D out Is 5mm, and the pipe length is 84mm, X-ray tube (1) is placed in capillary entry end 48mm, monochromator (3) are located capillary exit end 17mm.
5. The X-ray fluorescence spectrometer according to claim 1, characterized in that the X-ray tube (1) emits X-rays of more than 25kev.
6. The X-ray fluorescence spectrometer of claim 5, wherein the first direction is less than or equal to 8.87 degrees from the second direction.
7. The X-ray fluorescence spectrometer of claim 6, wherein the first direction is at a 6 degree angle to the second direction.
8. The X-ray fluorescence spectrometer according to any of claims 1-7, characterized in that the capillary (2) is made of glass material.
9. The X-ray fluorescence spectrometer according to claim 1, characterized in that the monochromator (3) is a hyperboloid curved crystal.
10. The X-ray fluorescence spectrometer of claim 9, wherein the doubly curved crystal is a lithium fluoride material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221575193.XU CN218036510U (en) | 2022-06-22 | 2022-06-22 | X-ray fluorescence spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221575193.XU CN218036510U (en) | 2022-06-22 | 2022-06-22 | X-ray fluorescence spectrometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218036510U true CN218036510U (en) | 2022-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221575193.XU Active CN218036510U (en) | 2022-06-22 | 2022-06-22 | X-ray fluorescence spectrometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218036510U (en) |
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2022
- 2022-06-22 CN CN202221575193.XU patent/CN218036510U/en active Active
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