Target ionization system

Abstract

The utility model discloses a target ionization system which comprises a laser generator and a vacuum target chamber. The side wall of the vacuum target chamber is provided with five windows, the five windows are located on the same horizontal plane and are respectively a first laser entrance, a second laser entrance, a first laser exit, a second laser exit and a detection port, the first laser entrance is right opposite to the first laser exit, the second laser entrance is right opposite to the second laser exit, and the detection port is located in the same horizontal plane. Meanwhile, the straight line where the first laser entrance and the second laser exit are located is orthogonal to the straight line where the second laser entrance and the second laser exit are located; laser generated by the laser generator is divided into a first laser beam and a second laser beam through the spectroscope, and the first laser beam and the second laser beam are reflected by the first high-reflectivity mirror and the second high-reflectivity mirror respectively and enter the vacuum target chamber from the first laser entrance and the second laser entrance. According to the utility model, the target material can be efficiently ionized to obtain enough ions, so that the spectral signal-to-noise ratio is effectively improved, and the spectral resolution is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection, relates to the ionization of a target, and particularly relates to a target ionization system. Background Art

[0002] Before detecting a target, pulsed laser is often used to ionize the target in a vacuum target chamber. The vacuum target chamber is vertically arranged, and three windows are provided on the side wall of the vacuum target chamber. The three windows are located on the same horizontal plane, and the three windows are respectively a laser incident port, a laser exit port, and a detection port. The laser incident port and the laser exit port are arranged opposite to each other. A vacuum pump is provided at the lower end of the vacuum target chamber to ensure a vacuum environment. The laser generated by the laser generator enters the vacuum target chamber from the laser incident port to ionize the target and then exits from the laser exit port. The detection port is connected to detection equipment, and the ions ionized in the vacuum target chamber enter the detection equipment from the detection port for detection.

[0003] However, for targets of some specific molecules, the above ionization method results in a limited number of ions obtained by ionization, a low spectral signal-to-noise ratio, and a low spectral resolution. Summary of the Invention

[0004] Aiming at the above deficiencies existing in the prior art, the purpose of the utility model is to provide a target ionization system, which can efficiently ionize the target to obtain a sufficient number of ions, thereby effectively improving the spectral signal-to-noise ratio and the spectral resolution.

[0005] The technical solution of the utility model is realized as follows:

[0006] A target ionization system includes a laser generator and a vacuum target chamber; the vacuum target chamber is vertically arranged, a target beam inlet is provided at the upper end of the vacuum target chamber, a vacuum pump is provided at the lower end of the vacuum target chamber, and five windows are provided on the side wall of the vacuum target chamber. The five windows are located on the same horizontal plane, and the five windows are respectively a first laser incident port, a second laser incident port, a first laser exit port, a second laser exit port, and a detection port. Among them, the first laser incident port and the first laser exit port are arranged opposite to each other, the second laser incident port and the second laser exit port are arranged opposite to each other, and at the same time, the straight line where the first laser incident port and the second laser exit port are located is orthogonal to the straight line where the second laser incident port and the second laser exit port are located.

[0007] The laser generated by the laser generator is divided into a first laser beam and a second laser beam by a beam splitter. The first laser beam is reflected by a first highly reflective mirror and enters the vacuum target chamber from the first laser incident port, and the second laser beam is reflected by a second highly reflective mirror and enters the vacuum target chamber from the second laser incident port.

[0008] Further, a reflective material is provided on the inner wall of the vacuum target chamber.

[0009] Furthermore, high lenses are provided at the first laser inlet, the second laser inlet, the first laser outlet, and the second laser outlet, facilitating the first laser beam and the second laser beam to enter the vacuum target through the first laser inlet and the second laser inlet, ionize the target, and then exit through the first laser outlet and the second laser outlet.

[0010] Compared with the prior art, the present utility model has the following beneficial effects:

[0011] 1. In the present utility model, two sets of laser inlets and laser outlets are provided in the vacuum target chamber, enabling the laser beams to ionize the target successively after entering the vacuum target chamber from the two laser inlets. After the prior laser beam acts on the target beam, the subsequent laser beam will further heat the target beam, thereby effectively ionizing the target to obtain a sufficient number of ions, and then improving the spectral signal-to-noise ratio and the spectral resolution.

[0012] 2. By providing a reflective material on the inner wall of the vacuum target chamber in the present utility model, the reflectivity of the laser in the vacuum target chamber can be effectively improved, thereby increasing the number of ions generated by the laser to ionize the target, and then improving the spectral resolution. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 - Structural schematic diagram of the present utility model.

[0014] Figure 2 - Schematic diagram of the vacuum target chamber.

[0015] Wherein: 1 - vacuum target chamber; 11 - first laser inlet; 12 - second laser inlet; 13 - first laser outlet; 14 - second laser outlet; 15 - detection port; 2 - laser generator; 3 - beam splitter; 4 - first highly reflective mirror; 5 - second highly reflective mirror; 6 - vacuum pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The present utility model will be further described in detail below in conjunction with the drawings and the detailed description of the embodiments.

[0017] See Figure 1 and Figure 2, A target ionization system, comprising a laser generator 2 and a vacuum target chamber 1; the vacuum target chamber is vertically arranged, the upper end of the vacuum target chamber 1 is provided with a target beam inlet, the lower end of the vacuum target chamber 1 is provided with a vacuum pump 6, and the side wall of the vacuum target chamber 1 is provided with five windows. The five windows are located on the same horizontal plane, and the five windows are respectively a first laser inlet 11, a second laser inlet 12, a first laser outlet 13, a second laser outlet 14 and a detection port 15. Among them, the first laser inlet 11 and the first laser outlet 13 are opposite to each other, the second laser inlet 12 and the second laser outlet 14 are opposite to each other, and at the same time, the straight line where the first laser inlet 11 and the second laser outlet 13 are located is orthogonal to the straight line where the second laser inlet 12 and the second laser outlet 14 are located.

[0018] The laser generated by the laser generator 2 is split into a first laser beam and a second laser beam by a beam splitter 3. The first laser beam is reflected by a first high reflector 4 and enters the vacuum target chamber 1 from the first laser inlet 11, and the second laser beam enters the vacuum target chamber 1 from the second laser inlet 12 after being reflected by a second high reflector 5.

[0019] The detection port here can be located between the first laser inlet and the second laser inlet, between the second laser inlet and the first laser outlet, and between the second laser outlet and the first laser inlet. In this embodiment, the detection port is arranged between the first laser outlet and the second laser outlet. The first laser beam enters the vacuum target chamber from the first laser inlet to ionize the target material, and then exits from the first laser outlet. The second laser beam enters the vacuum target chamber from the second laser inlet to ionize the target material, and then exits from the second laser outlet; the two laser beams enter the vacuum target chamber in sequence to ionize the target material. After the first laser beam acts on the target beam, the second laser beam will further heat the target beam, so as to effectively ionize the target material to obtain a sufficient number of ions, thereby improving the spectral signal-to-noise ratio and the spectral resolution.

[0020] During specific implementation, the inner wall of the vacuum target chamber 1 is provided with a reflective material (not shown in the figure). In this way, the reflectivity of the laser in the vacuum target chamber can be improved, thereby further increasing the number of ions for ionizing the target material and improving the spectral resolution.

[0021] During specific implementation, high lenses are provided at the first laser inlet 11, the second laser inlet 12, the first laser outlet 13 and the second laser outlet 14 to seal the corresponding first laser inlet 11, second laser inlet 12, first laser outlet 13 and second laser outlet 14, and at the same time facilitate the first laser beam and the second laser beam to enter the vacuum target material 1 from the first laser inlet 11 and the second laser inlet 12 to ionize the target material and then exit from the first laser outlet 13 and the second laser outlet 14.

[0022] Finally, it should be noted that the above embodiments of the present utility model are only examples for explaining the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, other different forms of changes and modifications can be made based on the above description. It is impossible to enumerate all the implementation manners here. Any obvious changes or modifications derived from the technical solutions of the present utility model still fall within the protection scope of the present utility model.

Claims

1. A target ionization system, characterized in that: It comprises a laser generator and a vacuum target chamber; the vacuum target chamber is vertically arranged, a target beam inlet is arranged at the upper end of the vacuum target chamber, a vacuum pump is arranged at the lower end of the vacuum target chamber, and five windows are arranged on the side wall of the vacuum target chamber, the five windows are located in the same horizontal plane, and the five windows are respectively a first laser inlet, a second laser inlet, a first laser outlet, a second laser outlet and a detection port, wherein the first laser inlet and the first laser outlet are opposite to each other, the second laser inlet and the second laser outlet are opposite to each other, and the straight line where the first laser inlet and the second laser outlet are located is orthogonal to the straight line where the second laser inlet and the second laser outlet are located; The laser generated by the laser generator is divided into a first laser beam and a second laser beam by a spectroscope. The first laser beam is reflected by a first high-reflection mirror and enters the vacuum target chamber from a first laser entrance. The second laser beam is reflected by a second high-reflection mirror and enters the vacuum target chamber from a second laser entrance.

2. A target ionization system according to claim 1, characterized in that: The inner wall of the vacuum target chamber is provided with reflective material.

3. A target ionization system according to claim 1, characterized in that: High lenses are provided at the first laser entrance, the second laser entrance, the first laser exit and the second laser exit, so as to facilitate the first laser beam and the second laser beam to enter the vacuum target material from the first laser entrance and the second laser entrance to ionize the target material and then be emitted from the first laser exit and the second laser exit.

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