Signal enhancement device and method for glow discharge spectrometer

Abstract

The invention relates to the technical field of glow discharge spectrum analysis, and provides a signal enhancement device and method for a glow discharge spectrograph, the signal enhancement device comprises a shell, an insulating plate and a magnet, the insulating plate is coaxially arranged in an accommodating cavity of the shell, and the insulating plate is provided with a through hole; the magnets are suitable for being arranged in the through holes of the insulating plate and are symmetrically arranged along the central axis of the anode cylinder of the glow discharge spectrometer, so that the central positions of the magnets correspond to the central axis of the anode cylinder of the glow discharge spectrometer. The magnet array is arranged between the sample and the power supply and can introduce a magnetic field into a glow discharge process, so that electrons do Larmor motion under the combined action of the magnetic field and an electric field, the motion trail of the electrons is prolonged, the collision probability of the electrons and other particles is increased, the excitation efficiency is improved, and the signal intensity is enhanced; meanwhile, the center position of the magnet corresponds to the central axis of the anode cylinder of the glow discharge spectrometer, and the magnet array has a more obvious signal enhancement effect.

Description

Technical Field

[0001] The present invention relates to the technical field of glow discharge spectrum analysis, and further to a signal enhancement device and method for a glow discharge spectrometer. Background Art

[0002] The rapid development of advanced materials in recent years has placed increasing demands on material characterization techniques and methods. The concentration and depth distribution of trace elements in a material's composition significantly influence its properties, such as optical, electrical, acoustic, and mechanical properties. Developing efficient characterization devices and methods to accurately characterize the concentration and depth distribution of trace elements not only helps reveal material properties, preparation processes, and mechanisms, but is also crucial for optimizing material properties and designing and preparing higher-performance materials.

[0003] Glow discharge spectroscopy offers advantages such as direct analysis of solid materials, high resolution, low detection limits, a wide linear dynamic range, the ability to analyze major, minor, and trace elements simultaneously, and minimal matrix effects. It has become an indispensable characterization and research tool in materials research and production. During in-depth material analysis, glow discharge spectroscopy can provide information on the concentration and depth distribution of major, minor, and trace elements from the surface to the interior, providing an effective means for revealing processes such as element diffusion and segregation, as well as predicting properties.

[0004] In order to obtain higher signal intensity and effectively improve detection sensitivity, existing glow discharge spectrometers usually increase the power. However, this method is not advisable for brittle and fragile samples. It can easily cause brittle and fragile samples (such as calcium fluoride crystals and bismuth silicate crystals) to break during the glow discharge spectrum depth analysis process, making effective detection and analysis impossible. Summary of the Invention

[0005] In response to the above technical problems, the purpose of the present invention is to provide a signal enhancement device and method for a glow discharge spectrometer. A magnet array is provided between the sample and the power supply. The magnet array can introduce a magnetic field into the glow discharge process, causing electrons to perform Larmor motion under the combined action of the magnetic field and the electric field. The electron motion trajectory is extended, increasing the probability of collision between electrons and other particles, thereby improving the excitation efficiency of atoms and enhancing the signal strength. At the same time, the center position of the magnet corresponds to the central axis of the anode tube of the glow discharge spectrometer, and the magnet array has a more obvious signal enhancement effect.

[0006] To achieve the above-mentioned object, the present invention provides a signal enhancement device for a glow discharge spectrometer, comprising a housing, an insulating plate, and a magnet. The housing is adapted to be coaxially arranged with an anode cylinder of the glow discharge spectrometer and to abut and assemble a sample against the end of the anode cylinder of the glow discharge spectrometer. A receiving cavity is provided inside the housing.

[0007] The insulating plate is coaxially arranged in the accommodating cavity of the shell, and a through hole is provided on the insulating plate;

[0008] The magnet is suitable for being arranged in the through hole of the insulating plate. The magnet is symmetrically arranged along the central axis of the anode cylinder of the glow discharge spectrometer, so that the center position of the magnet corresponds to the central axis of the anode cylinder of the glow discharge spectrometer.

[0009] In some embodiments, the insulating plate is a cylinder, and the inner side wall of the accommodating cavity matches the insulating plate; the insulator is provided with at least one axially penetrating through hole, and the through hole is symmetrically arranged along the central axis of the anode cylinder of the glow discharge spectrometer.

[0010] In some embodiments, the plurality of through holes are adapted to be spaced apart along a radial direction of the insulating plate;

[0011] Alternatively, the plurality of through holes are adapted to be arranged in an array along two radial directions of the insulating plate that are perpendicular to each other.

[0012] In some embodiments, the end surface of the insulating plate is arranged relatively parallel to the end surface of the anode cylinder of the glow discharge spectrometer, so that the magnetic induction lines of the magnet are suitable to be perpendicular to the central axis of the anode cylinder of the glow discharge spectrometer.

[0013] In some embodiments, the housing includes a first body and a second body that can be assembled and connected, the first body is suitable for connecting to a sample or an end of a glow discharge spectrometer, and the second body is suitable for connecting to a power source;

[0014] One end of the first main body has an opening and forms a receiving groove, and one end of the second main body has a connecting protrusion, which is suitable for being assembled in the receiving groove. The accommodating cavity is formed between the end of the connecting protrusion and the bottom of the receiving groove, and the insulating plate is abutted and installed between the bottom of the receiving groove and the end of the connecting protrusion.

[0015] In some embodiments, the first body includes an outer shell and a bottom wall, the bottom wall is arranged on the inner side of one end of the outer shell and forms the receiving groove, the bottom wall is relatively located between the sample and the magnet, and the thickness of the bottom wall is 0.5-2 mm.

[0016] In some embodiments, the first body further includes a rib, which is disposed on a side of the bottom wall away from the outer shell, and the rib is adapted to abut against the outer side of the sample or the outer side wall of the end of the glow discharge spectrometer, so that the shell is coaxially disposed at the end of the anode cylinder of the glow discharge spectrometer.

[0017] In some embodiments, the height of the rib is 0.5 mm greater than the thickness of the sample, and the rib is suitable for abutting against the outer side wall of the end of the glow discharge spectrometer;

[0018] An annular groove is further provided at one end of the bottom wall away from the receiving groove. The annular groove is relatively located on the outside of the insulating plate. A sealing member is suitable for being placed in the annular groove, and the sample is relatively located on the inside of the sealing member.

[0019] According to another aspect of the present application, a method for using the signal enhancement device for a glow discharge spectrometer according to any one of the above preferred embodiments is further provided, comprising arranging a signal enhancement device with a magnet between a sample and a power supply.

[0020] In some embodiments, the method comprises the steps of:

[0021] placing an insulating plate equipped with a magnet inside the first body of the housing;

[0022] Assemble the second body of the housing onto the first body so that the insulating plate is abutted against the inner side of the housing and parallel to the surface of the housing;

[0023] Install the seal into the annular groove of the shell, and then place the sample in the center of the rib of the shell so that the sample is located in the center of the shell;

[0024] The rib of the shell is then sleeved on the outer side of the end of the glow discharge spectrometer so that the center position of the sample and the center position of the magnet on the insulating plate correspond to the central axis of the anode cylinder of the optical discharge spectrometer.

[0025] Compared with the prior art, the signal enhancement device and method for a glow discharge spectrometer provided by the present invention have at least one of the following beneficial effects:

[0026] 1. A magnet array is placed between the sample and the power supply. The magnet array can introduce a magnetic field into the glow discharge process, causing electrons to perform Larmor motion under the combined action of the magnetic and electric fields. The electron trajectory is extended, increasing the probability of collision between electrons and other particles, thereby improving the excitation efficiency and thus enhancing the signal strength. At the same time, the center position of the magnet corresponds to the central axis of the anode tube of the glow discharge spectrometer, making the magnet array's signal enhancement effect more obvious.

[0027] 2. The magnetic induction lines of the magnet are suitable to be perpendicular to the central axis of the anode tube of the glow discharge spectrometer, and the magnet has a better effect on enhancing the signal.

[0028] 3. The rib is suitable for abutting against the outer side of the sample or the outer side wall of the end of the glow discharge spectrometer, so that the shell is coaxially arranged at the end of the anode tube of the glow discharge spectrometer, ensuring that the center position of the magnet and the central axis of the anode tube of the glow discharge spectrometer are arranged corresponding to each other, ensuring that the magnet can be stable during the signal enhancement process, and will not have an adverse effect on the stability and repeatability of the test results due to relative displacement of the magnet array combination. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The preferred embodiments will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0030] Figure 1 It is a diagram of the location of a signal enhancement device for a glow discharge spectrometer;

[0031] Figure 2 It is a structural diagram of a signal enhancement device for a glow discharge spectrometer;

[0032] Figure 3 It is the structural diagram of the first subject;

[0033] Figure 4 is a diagram of the array of magnets;

[0034] Figure 5 is the magnetic induction line diagram of a magnet;

[0035] Figure 6 2. This is a comparison chart of aluminum element signal intensity during depth analysis between the comparative example and the present example;

[0036] Figure 7 This is the sputtering crater morphology of this embodiment;

[0037] Figure 8 is the sputtering crater morphology of the comparative example;

[0038] Figure 9 FIG. 4 is a diagram of an array of magnets in another embodiment.

[0039] Description of Figure Numbers:

[0040] Shell 1, accommodating cavity 10, first body 11, outer shell 111, bottom wall 112, rib 113, second body 12, sealing member 13, insulating plate 2, through hole 21, magnet 3, anode cylinder 4, power supply 5. DETAILED DESCRIPTION

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive work.

[0042] To simplify the drawings, only portions relevant to the invention are schematically depicted in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one component with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0043] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0044] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0045] In addition, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance. It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered within the scope of protection of the present invention.

[0046] refer to Figures 1 to 4The present invention provides a signal enhancement device for a glow discharge spectrometer, comprising a shell 1, an insulating plate 2, and a magnet 3. The shell 1 is suitable for being coaxially arranged with an anode cylinder 4 of the glow discharge spectrometer and for a sample to be abutted against the end of the anode cylinder 4 of the glow discharge spectrometer. A accommodating cavity 10 is provided inside the shell 1; the insulating plate 2 is coaxially arranged in the accommodating cavity 10 of the shell 1, and a through hole 21 is provided on the insulating plate 2; the magnet 3 is suitable for being arranged in the through hole 21 of the insulating plate 2, and the magnet 3 is symmetrically arranged along the central axis of the anode cylinder 4 of the glow discharge spectrometer, so that the center position of the magnet 3 corresponds to the central axis of the anode cylinder 4 of the glow discharge spectrometer.

[0047] In this embodiment, a magnet 3 is provided between the sample and the power supply 5. The magnet 3 can introduce a magnetic field into the glow discharge process, causing electrons to perform Larmor motion under the combined action of the magnetic field and the electric field. The motion trajectory of the electrons is extended, which increases the probability of collision between the electrons and other particles, thereby improving the excitation efficiency and enhancing the ion signal intensity. At the same time, the center position of the magnet 3 corresponds to the central axis of the anode cylinder 4 of the glow discharge spectrometer, and the signal enhancement effect of the magnet 3 is more obvious.

[0048] Specifically, the main concept of this application is to introduce the magnetic field of a magnet 3 into a glow discharge spectrometer, causing electrons to perform Larmor motion in the magnetic field, thereby enhancing the ion signal intensity without increasing the power of the glow discharge spectrometer and avoiding the risk of sample damage. The signal enhancement device includes a housing 1, an insulating plate 2, and a magnet 3. The magnet 3 is fixedly mounted within a through-hole 21 of the insulating plate 2. The insulating plate 2 with the magnet 3 is fixedly mounted within a receiving cavity 10 of the housing 1. The housing 1 is adapted to abut the outer wall of the end of the anode tube 4 of the glow discharge spectrometer or the outer wall of the sample. The specific placement of the housing 1 is selected based on the size of the sample. If the sample is large, the housing 1 is directly mounted on the end of the sample away from the anode tube 4. If the sample is small, the housing 1 is mounted on the outer wall of the end of the anode tube 4 of the glow discharge spectrometer and the sample is pressed between the housing 1 and the end of the anode tube 4 of the glow discharge spectrometer. Therefore, the assembly of the sample to the end of the anode tube 4 of the glow discharge spectrometer can be completed independently or through the abutment of the housing 1. The insulating plate 2 is preferably a polytetrafluoroethylene separator.

[0049] Housing 1 primarily serves to center magnet 3 and the anode cylinder 4 of the glow discharge spectrometer, aligning the center of magnet 3 with the central axis of the anode cylinder 4. This is because experiments have confirmed that the plasma is confined within the copper anode, but the copper anode has a small diameter, so only the transverse magnetic field in the center contributes to the Larmor motion of electrons in the plasma. Therefore, magnet 3 at the center significantly enhances the signal, while magnets at the edges contribute little to signal enhancement. Therefore, the housing 1 is sleeved onto the outer wall of the end of the anode tube 4 of the glow discharge spectrometer or the outer wall of the sample, so that the housing 1 and the anode tube 4 of the glow discharge spectrometer are arranged coaxially. The insulating plate 2 is then coaxially arranged within the housing cavity 10 of the housing 1, so that the insulating plate 2 and the anode tube 4 of the glow discharge spectrometer are also arranged coaxially. The magnet 3 is then axially symmetrically arranged along the insulating plate 2. This allows the magnet 3 to be more quickly and accurately positioned symmetrically along the central axis of the anode tube 4 of the glow discharge spectrometer. The center position of the magnet 3 can be more quickly and accurately aligned with the central axis of the anode tube 4 of the glow discharge spectrometer, ensuring that the position of the magnet 3 and the copper anode are positioned in correspondence with each other. In this embodiment, the insulating plate 2 is cylindrical, and the inner wall of the housing cavity 10 matches the insulating plate 2. The insulator is provided with at least one axially extending through-hole 21, which is symmetrically arranged along the central axis of the anode tube 4 of the glow discharge spectrometer, thereby ensuring that the magnet 3 is symmetrically positioned along the central axis of the anode tube 4 of the glow discharge spectrometer.

[0050] It is worth noting that, according to different application scenarios, magnets 3 of different sizes can also be selected, and insulating plates 2 of different sizes and through holes 21 of different sizes can be selected accordingly. The number of magnets 3 is not further limited in this application. In this embodiment, a plurality of through holes 21 are suitable for being arranged at intervals along a radial direction of the insulating plate 2; or, a plurality of through holes 21 are suitable for being arranged in an array along two radial directions perpendicular to each other of the insulating plate 2. The through holes 21 include but are not limited to array combinations of 1×1, 1×2, 1×3, 2×2, etc., as long as the through holes 21 are symmetrically arranged along the central axis of the anode cylinder 4 of the glow discharge spectrometer. In a variant embodiment, refer to Figure 9 The through holes 21 may be arranged in a 3×3 array. Depending on the distribution of the magnets 3 , the magnetic field configuration of the magnets 3 may be divided into an L-shape, a cross-shape, a D-shape, an I-shape, a U-shape, etc. The shapes of the magnets 3 include, but are not limited to, a square, a sphere, a circle, etc.

[0051] Further, refer to Figure 1 、 Figure 4 、 Figure 5 and Figure 9 The end face of the insulating plate 2 is arranged parallel to the end face of the anode cylinder 4 of the glow discharge spectrometer, so that the magnetic induction lines of the magnet 3 are perpendicular to the central axis of the anode cylinder 4 of the glow discharge spectrometer.

[0052] In this embodiment, the magnetic induction lines of the magnet 3 are adapted to be perpendicular to the central axis of the anode cylinder 4 of the glow discharge spectrometer, and the magnet 3 has a better signal enhancement effect.

[0053] Specifically, the end face of the insulating plate 2 is arranged relatively parallel to the end face of the anode tube 4 of the glow discharge spectrometer, so that the central axis of the anode tube 4 of the glow discharge spectrometer and the two end faces of the insulating plate 2 are perpendicular to each other. According to geometry, if a straight line is perpendicular to two intersecting straight lines in a plane, then the straight line is perpendicular to this plane, and the through holes 21 are suitable for being arranged at intervals along the radial direction of the insulating plate 2, then the magnetic induction lines of the magnet 3 are along the radial direction of the insulating plate 2, thereby making the magnetic induction lines of the magnet 3 suitable for being perpendicular to the central axis of the anode tube 4 of the glow discharge spectrometer. The mutual parallelism of the two end faces of the insulating plate 2 and the end face of the anode tube 4 of the glow discharge spectrometer is achieved through the shell 1, reference Figure 2 and Figure 3 The housing 1 includes a first body 11 and a second body 12 that can be assembled and connected. The first body 11 is suitable for connecting to a sample or the end of a glow discharge spectrometer, and the second body 12 is suitable for connecting to a power supply 5. One end of the first body 11 has an opening and forms a receiving groove. One end of the second body 12 has a connecting protrusion, which is suitable for being assembled and set in the receiving groove. A receiving cavity 10 is formed between the end of the connecting protrusion and the bottom of the receiving groove. The insulating plate 2 is installed in contact with the bottom of the receiving groove and the end of the connecting protrusion, so that the insulating plate 2 remains relatively parallel to the end face of the anode cylinder 4 of the glow discharge spectrometer. The connection between the first body 11 and the second body 12 can be locked and fixed by the external thread on the outside of the connecting protrusion and the internal thread in the receiving groove. Of course, other fixing structures are also possible.

[0054] It is worth noting that in a modified embodiment, the magnetic induction lines of the magnet 3 can also be arranged parallel to the central axis of the anode cylinder 4 of the glow discharge spectrometer. However, compared with the above embodiment, the signal enhancement effect of the magnet 3 in this modified embodiment is poorer. The first body 11 also includes a housing 111 and a bottom wall 112. The bottom wall 112 is arranged on the inner side of one end of the housing 111 and forms a storage groove. The bottom wall 112 is relatively located between the sample and the magnet 3. The bottom wall 112 should not be too thick to prevent it from affecting the signal enhancement effect of the magnet 3. Preferably, the thickness of the bottom wall 112 is 0.5-2 mm.

[0055] Furthermore, the first main body 11 also includes a rib 113, which is arranged on the side of the bottom wall 112 away from the outer shell 111. The rib 113 is suitable for abutting against the outside of the sample or the outer wall of the end of the glow discharge spectrometer, so that the shell 1 is coaxially arranged at the end of the anode cylinder 4 of the glow discharge spectrometer.

[0056] In this embodiment, the rib 113 is suitable for abutting against the outer side of the sample or the outer side wall of the end of the glow discharge spectrometer, so that the shell 1 is coaxially arranged at the end of the anode tube 4 of the glow discharge spectrometer, ensuring that the center position of the magnet 3 and the central axis of the anode tube 4 of the glow discharge spectrometer are arranged corresponding to each other, ensuring that the magnet 3 can be stable during the signal enhancement process, and will not have an adverse effect on the stability and repeatability of the test results due to the relative displacement of the array combination of the magnet 3.

[0057] Specifically, the rib 113 can more conveniently install the housing 1 on the sample end or the end of the anode tube 4 of the glow discharge spectrometer, so that the housing 1 can be stably connected to the sample end or the end of the anode tube 4 of the glow discharge spectrometer, ensuring that the array center position of the magnet 3 is always consistent with the position of the central axis of the anode tube 4 at the emission port of the glow discharge spectrometer, ensuring that the magnet 3 can be stable during the signal enhancement process, and will not have an adverse effect on the stability and repeatability of the test results due to the relative displacement of the magnet 3 array combination. If the rib 113 is suitable for abutting the outer wall of the end of the glow discharge spectrometer, the height of the rib 113 is preferably 0.5mm larger than the thickness of the sample, so that the rib 113 can abut the outer wall of the end of the glow discharge spectrometer. It is worth noting that the thickness of the sample is preferably 1-3mm. The height of the rib 113 is preferably 1.5-3.5mm. An annular groove is further provided at one end of the bottom wall 112, away from the receiving groove. The annular groove is relatively outside the insulating plate 2 and is suitable for placing a seal 13 therein. The sample is relatively located inside the seal 13, which provides a vacuum seal. The diameter of the seal 13 is 18-30 mm.

[0058] Furthermore, the present invention uses a Horiba GD Profile 2 glow discharge spectrometer to perform signal enhancement during the deep analysis of an aluminum plate with a size of 10.0mm×10.0mm×1.0mm. The magnet 3 used has a specification of 10.0mm×10.0mm×5.0mm, which is fixed in a polytetrafluoroethylene insulating plate 2. The array of magnets 3 is arranged in a 1×3 combination mode, and a signal enhancement device is composed according to the above description, and its surface magnetic field strength is about 180-200mT. The test conditions are an argon pressure of 700Pa, a power of 30W, a copper anode diameter of 2.0mm, that is, a sputtering aperture of 2.0mm, and a glow discharge spectrum depth analysis time of 3.0min. The only difference between the comparative example and the present example is that the array of magnet 3 is not applied. The signal intensity of the aluminum element during the deep analysis process of the comparative example and the present example is compared, and the results are as follows. Figure 6When the magnet array 3 is not applied, the aluminum element signal intensity is about 70V (expressed in voltage), while after the magnet array 3 is applied, the aluminum element signal intensity is about 1300V (expressed in voltage), and its signal intensity is increased by two orders of magnitude. In addition, after the depth analysis is completed, the sputtering pits left on the sample surface are inspected by profilometer, and the inspection results are shown as follows: Figure 7 、 Figure 8 As shown, Figure 7 and Figure 8 The following are the sputtering crater morphologies obtained after depth analysis for the comparative example and the present example. The results show that, under the same test conditions, the sputtering depth in the comparative example was 22 μm, while after using the signal enhancement device, the sputtering depth was approximately 28 μm, demonstrating that the signal enhancement device can improve the instrument's sputtering efficiency to a certain extent.

[0059] Furthermore, the present invention provides a method for using the signal enhancement device for a glow discharge spectrometer in any of the above embodiments, comprising arranging the signal enhancement device with a magnet 3 between a sample and a power supply 5 .

[0060] Specifically, the method includes the following steps: placing an insulating plate 2 equipped with an array of magnets 3 in a first main body 11 of a shell 1, wherein the magnetic pole directions of the magnets 3 remain consistent or otherwise, and are parallel to the surface direction of the shell 1; then assembling the second main body 12 of the shell 1 onto the first main body 11, so that the insulating plate 2 is abutted against the inner side of the shell 1, and the insulating plate 2 is parallel to the surface of the shell 1, and the cylindrical insulating plate 2 is wrapped by the copper shell 1, and the first main body 11 and the second main body 12 of the shell 1 act as a container and a conductor; installing the seal 13 into the annular groove of the shell 1, and then placing the sample on the retaining edge of the shell 1. The sample is positioned at the center of the housing 1, with the seal 13 providing a vacuum seal. The housing 1's rib 113 is then placed outside the end of the glow discharge spectrometer, ensuring that the sample center and the center of the magnet 3 on the insulating plate 2 align with the central axis of the anode tube 4 of the optical discharge spectrometer. This ensures that the center of the magnet 3 array is always aligned with the central axis of the anode tube 4 at the plasma emission port of the glow discharge spectrometer. This ensures that the magnet 3 remains stable during the signal enhancement process, and that relative displacement of the magnet 3 array assembly does not adversely affect the stability and repeatability of the test results. Finally, the sample is tested, the signal intensity of the element to be measured is recorded, and the sputtering craters for depth analysis are detected. The sample analysis method of this embodiment simplifies sample pretreatment and requires no special sample preparation. Simply selecting an appropriate array of magnets 3 to enhance the sample test signal is sufficient. Furthermore, the signal enhancement device, equipped with a seal 13, can also meet the vacuum requirements of the glow discharge chamber during the loading of small samples, preventing sample loss. The method is highly universal and has a wide range of applications. It is worth noting that before testing, the samples need to be cleaned with ultrapure water and anhydrous ethanol and dried in sequence.

[0061] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A signal enhancement device for a glow discharge spectrometer, characterized in that: include: A housing, wherein the housing is coaxially arranged with the anode cylinder of the glow discharge spectrometer and the sample is abutted against the end of the anode cylinder of the glow discharge spectrometer, and a receiving cavity is provided inside the housing; an insulating plate, the insulating plate being coaxially disposed in the accommodating cavity of the housing, and having a through hole formed on the insulating plate; A magnet is suitable for being arranged in the through hole of the insulating plate, and the magnet is symmetrically arranged along the central axis of the anode cylinder of the glow discharge spectrometer, so that the center position of the magnet corresponds to the central axis of the anode cylinder of the glow discharge spectrometer.

2. The signal enhancement device for a glow discharge spectrometer according to claim 1, characterized in that: The insulating plate is a cylinder, and the inner side wall of the accommodating cavity matches the insulating plate; the insulator is provided with at least one axially penetrating through hole, and the through holes are symmetrically arranged along the central axis of the anode cylinder of the glow discharge spectrometer.

3. The signal enhancement device for a glow discharge spectrometer according to claim 2, characterized in that: The plurality of through holes are adapted to be spaced apart along a radial direction of the insulating plate; Alternatively, the plurality of through holes are adapted to be arranged in an array along two radial directions of the insulating plate that are perpendicular to each other.

4. The signal enhancement device for a glow discharge spectrometer according to claim 1, characterized in that: The end surface of the insulating plate is arranged relatively parallel to the end surface of the anode cylinder of the glow discharge spectrometer, so that the magnetic induction lines of the magnet are suitable to be perpendicular to the central axis of the anode cylinder of the glow discharge spectrometer.

5. A signal enhancement device for a glow discharge spectrometer according to any one of claims 1 to 4, characterized in that: The housing comprises a first body and a second body which can be assembled and connected, the first body is suitable for connecting to a sample or an end of a glow discharge spectrometer, and the second body is suitable for connecting to a power supply; One end of the first main body has an opening and forms a receiving groove, and one end of the second main body has a connecting protrusion, which is suitable for being assembled in the receiving groove. The accommodating cavity is formed between the end of the connecting protrusion and the bottom of the receiving groove, and the insulating plate is abutted and installed between the bottom of the receiving groove and the end of the connecting protrusion.

6. The signal enhancement device for a glow discharge spectrometer according to claim 5, characterized in that: The first body includes an outer shell and a bottom wall. The bottom wall is arranged on the inner side of one end of the outer shell and forms the receiving groove. The bottom wall is relatively located between the sample and the magnet. The thickness of the bottom wall is 0.5-2 mm.

7. The signal enhancement device for a glow discharge spectrometer according to claim 6, characterized in that: The first body also includes a rib, which is arranged on the side of the bottom wall away from the shell. The rib is suitable for abutting against the outside of the sample or the outer wall of the end of the glow discharge spectrometer, so that the shell is coaxially arranged at the end of the anode cylinder of the glow discharge spectrometer.

8. The signal enhancement device for a glow discharge spectrometer according to claim 7, characterized in that: The height of the rib is 0.5 mm greater than the thickness of the sample, and the rib is suitable for abutting against the outer side wall of the end of the glow discharge spectrometer; An annular groove is further provided at one end of the bottom wall away from the receiving groove. The annular groove is relatively located on the outside of the insulating plate. A sealing member is suitable for being placed in the annular groove, and the sample is relatively located on the inside of the sealing member.

9. A method for using the signal enhancement device for a glow discharge spectrometer according to any one of claims 1 to 8, characterized in that: A signal enhancement device with a magnet is placed between the sample and the power supply.

10. The method according to claim 9, characterized in that Including steps: placing an insulating plate equipped with a magnet inside the first body of the housing; Assemble the second body of the housing onto the first body so that the insulating plate is abutted against the inner side of the housing and parallel to the surface of the housing; Install the seal into the annular groove of the shell, and then place the sample in the center of the rib of the shell so that the sample is located in the center of the shell; The rib of the shell is then sleeved on the outer side of the end of the glow discharge spectrometer so that the center position of the sample and the center position of the magnet on the insulating plate correspond to the central axis of the anode cylinder of the optical discharge spectrometer.

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