CN209843657U - Multistage rod ion focusing transmission equipment - Google Patents
Multistage rod ion focusing transmission equipment Download PDFInfo
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- CN209843657U CN209843657U CN201920479347.7U CN201920479347U CN209843657U CN 209843657 U CN209843657 U CN 209843657U CN 201920479347 U CN201920479347 U CN 201920479347U CN 209843657 U CN209843657 U CN 209843657U
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Abstract
The utility model discloses a multistage pole ion focusing transmission equipment, including ion source part, ionic lens part, focus part, analysis ware part and detector part, ionic lens part, focus part analysis ware part all are joined with vacuum system, form inside vacuum chamber under the operating condition, focus part internally mounted has multistage pole ion focusing transmission part, multistage pole ion focusing transmission part contains the entry big and export little and the entrance bore reaches multistage pole focus structure that the export bore level and smooth degressive; the utility model discloses can make the mechanism preparation simple and easy convenience, more can further reduce the volume of whole equipment, also can reduce certain cost simultaneously, more can improve the ion focusing ability, promote ultimate detectivity.
Description
Technical Field
The utility model belongs to the technical field of the ion focusing transmission and specifically relates to a based on multistage pole ion focusing transmission equipment.
Background
The mass spectrometer is a high-sensitivity and high-resolution instrument for detecting chemical components of substances, and is characterized by that firstly, the sample is converted into gaseous ions, then the ions are separated according to the mass-to-charge ratio (m/z) by means of electric field or magnetic field, then the intensity of the ions is measured to form mass spectrum, and according to the mass spectrum the chemical components of the substances can be qualitatively or quantitatively obtained.
Analyte ions for analysis by mass spectrometry can be generated by any of a variety of ionization systems. For example, AP-MALDI, APPI, ESI, APCI, and ICP systems can be used in mass spectrometry systems to generate ions. Many of these systems generate ions at or near atmospheric pressure (760 Torr). After the ions are generated, the analyte ions must be introduced or sampled into the mass spectrum. Typically, the analyzer portion of the mass spectrometer is held at 10-4Torr to 10-8High vacuum level of Torr. In practice, sampling the ions involves transporting the analyte ions in the form of a finely defined ion beam from the ion source via one or more intermediate vacuum chambers to a high vacuum mass spectrometer chamber. Each of the intermediate vacuum chambers maintains a vacuum level between the front and rear chambers. Thus, the analyte ions are transitioned from the pressure level associated with ion formation to the pressure level of the mass spectrometer in a stepwise manner therein. In most applications, it is desirable to transport ions through each of the various chambers of a mass spectrometer system without significant ion loss. Ion guidance is commonly used in MS systems to move ions in a defined direction.
The ion transmission product on the market is a six-grade rod with uniform diameter, and the diameter of an inlet and the diameter of an outlet formed by 6 inscribed circles of the six-grade rod are the same. After a radio frequency electric field and an axial gradient electric field are applied to the six-stage rod, ions can be focused inside the six-stage rod and then enter the outlet from the inlet, and because the ion source is in the atmospheric pressure outside the vacuum, the ions and the neutral gas are driven by the pressure difference between the vacuum and the atmospheric pressure and enter through a small narrow hole, the hole diameter is enlarged, the total amount of the ions and the neutral gas which can enter the vacuum can be increased, but a vacuum pump with higher pumping speed is needed to maintain separation, and the necessary background vacuum of the ions is detected. And correspondingly, the inscribed circle of the six-stage rod needs to be larger, so that most of the ions enter the six-stage rod after rapidly expanding through the small hole, are restrained by the alternating current electric field and then are focused. However, after the diameter of the inscribed circle of the six-stage rod is large, the focusing effect at the outlet is poor, and more ions are diffused and lost after exiting the six-stage rod and are difficult to enter the lower-stage ion optical path, so that a method and a method are needed to be found, wherein the method and the method can obtain more ions to be detected at the inlet, better focused ions at the outlet and better detection background to obtain higher sensitivity.
SUMMERY OF THE UTILITY MODEL
In view of the above, there is a need to overcome at least one of the above-mentioned drawbacks of the prior art, and the present invention provides a multi-stage rod ion focusing transmission apparatus comprising an ion source part in a first order, an ion lens part in a second order, a focusing part in a third order, an analyzer part in a fourth order, and a detector part in a fifth order, a first barrier provided with a first through hole for an ion beam generated by the ion source part being installed between the ion source part and the ion lens part, a second barrier provided with a second through hole for an ion beam focused by the ion lens being installed between the ion lens part and the focusing part, a third barrier provided with a third through hole for an ion beam focused by the focusing part being installed between the focusing part and the analyzer part, a fourth diaphragm provided with a fourth through hole through which the ion beam from the analyzer unit passes is installed between the analyzer unit and the detector unit; the ion lens component, the focusing component and the analyzer component are all connected with a vacuum system, an internal vacuum chamber is formed in the working state, a multi-stage rod ion focusing transmission component is installed in the focusing component, and the multi-stage rod ion focusing transmission component comprises a multi-stage rod focusing structure with a large inlet, a small outlet and a smooth and gradually-reduced diameter from the inlet caliber to the outlet caliber.
The ion source component emits ion beams, the ion beams enter a vacuum chamber in the ion lens component through a first through hole, the ion beams are focused by the ion lens component and then enter the vacuum chamber of the focusing component through a second through hole, gaps are reserved among the second partition plate, the inlet, the outlet and the third plate, the aperture of the second through hole is set according to the diameter formed by the ion beams, the ion beams are focused by the multi-stage rod focusing structure and then are emitted through the outlet, and the aperture of the third through hole is set according to the ion beams emitted from the outlet and enters the analyzer component and the fifth downstream detector component through the third through hole for analysis and detection.
According to the prior art in the background of the patent, the apertures of an ion beam inlet and an ion beam outlet are the same, so that the problem that the cost and the complexity of the whole equipment cannot be increased and the focusing capacity can be improved by a low cost or a simple method cannot be simultaneously solved; the utility model discloses a multistage pole ion focusing transmission equipment, through the multistage pole ion focusing transmission equipment who has ion beam entry bore to be greater than the ion beam export bore, can make the mechanism preparation simple and easy convenient, more can further reduce the volume of whole equipment, also can reduce certain cost simultaneously, more can improve the ion focusing ability, promote ultimate detectivity, leave for the ion beam the through-hole bore selection that ion lens part got into links such as focusing part needs to be set for according to the diameter of the ion beam that gets into corresponding part, in this application, first through-hole bore needs to guarantee as far as possible that the effective ion composition that the ion source produced gets into the ion lens part, prevents simultaneously that non-effective cost branch from getting into ion lens, second through-hole bore needs to guarantee as far as possible that the effective ion composition that comes from among the ion lens gets into, after the ion beam enters the vacuum chamber of the focusing component, the non-effective components are extracted by a vacuum pump on one hand, and on the other hand, the corresponding occupation ratio is gradually reduced due to the fact that the ion beam cannot be focused, the diameter of the third through hole can be determined through theory and experiments according to the diameter of the ion beam and the blocking of the non-effective components, and the diameter of the third through hole is greatly smaller than the corresponding diameter of the traditional equipment; the equipment of this case application can cause the increase of the field intensity of inner space, progressively strengthens inner space ion focusing ability, can further reduce the exit dimension simultaneously for final testing result is more accurate, and adopt the structure of size progressively reduced type can more reduce the exit aperture than adopting the structure of size homogeneous, brings better effect to final testing result, wherein, the cylinder type structure and the conical structure of this case, still should can contain the structure of cross section and size unanimity and the structure of cross section and size progressively reduced, should not only confine the specific word meaning of this case to.
The ion source is in the atmospheric pressure outside the vacuum, ions and neutral gas are driven by the pressure difference between the vacuum and the atmospheric pressure, the ions enter a space structure with a large inlet and a small outlet through a first through hole and a second through hole at high speed, the ions can be focused inside the multi-stage rod after a radio frequency electric field and an axial gradient electric field are applied to the rod body, and then enter the outlet from the inlet, on one hand, the diameter of the inlet of the multi-stage rod is large, so that more ions can enter the multi-stage rod after being rapidly expanded through the small holes, are restrained by an alternating current electric field and then are focused; on the other hand, due to the adoption of the equipment structure applied by the scheme, the field intensity in a space structure can be further increased, the size of the outlet can be further reduced, the ion focusing performance is enhanced, meanwhile, the detection background can be further reduced due to the further reduction of the size of the outlet, and the overall sensitivity of detection is improved.
In addition, according to the utility model discloses a multistage pole ion focusing transmission equipment still has following additional technical characterstic:
furthermore, the multistage rod focusing structure comprises a plurality of conductive rod pieces, and the conductive rod pieces form a space symmetrical structure with a large inlet aperture and a small outlet aperture around the same central axis; the conductive rods are fixedly connected in the hollow cavities of the supporting bases.
Further, the number of the conductive rods is 4 or 6 or 8.
Furthermore, the conductive rod piece is a metal rod piece or a rod piece with a wrapped metal coating or a rod piece with a metal rod piece inside and an insulating coating outside.
Furthermore, the multistage rod focusing structure comprises a plurality of long-axis equal-diameter conducting rods, the long-axis equal-diameter conducting rods form a space symmetrical structure around the same axis to form a long-axis equal-diameter conical structure with an inlet aperture larger than an outlet aperture; the supporting seats are provided with internal through holes, the long-axis constant-diameter conducting rods are fixedly connected to the inner sides of the through holes, the caliber of the outlet is greater than or equal to 2mm, the diameter of each long-axis constant-diameter conducting rod is greater than or equal to 1mm and less than or equal to 50mm, the supporting seats are connected with the long-axis constant-diameter conducting rods in a staggered mode, and an external power supply capable of forming a radio-frequency electric field and an axial gradient electric field in the conical structure with the long-axis conducting rods is connected;
or
The multistage rod focusing structure comprises a plurality of conical conducting rods and a supporting seat, the conical conducting rods are distributed in a central symmetry mode around a central axis and form a conical space structure with an open cavity inside, an inlet and an outlet are formed at two ends of the conical space structure, and the diameter of the inlet is larger than that of the outlet; the supporting seat comprises a fixing piece, a first conductive polar plate and a second conductive polar plate, the conical conductive rods, the first conductive polar plate and the second conductive polar plate form sequential connection of a high-frequency electric field and an axial gradient electric field in the open type cavity, the first conductive polar plate and the second conductive polar plate are fixedly installed on the fixing piece, the conical conductive rods are fixedly connected to the inner side of a hollow hole of the fixing piece, and the first conductive polar plate and the second conductive polar plate are connected with an external power supply.
Or
The multistage rod focusing structure comprises a plurality of bending conductive rods and a supporting seat, the bending conductive rods are distributed in a central symmetry mode around a central axis and form a bending space structure with an open cavity inside, each bending conductive rod comprises a straight section and a bending section, the straight section is of a cylindrical structure or a conical structure, the bending section is of a cylindrical structure or a conical structure, the top end face of the straight section is the bottom end face of the bending section, the top ends of the bending sections are converged towards the central axis to form a central symmetry distribution structure around the central axis, and the bending space structure forms a bending space structure with a large inlet aperture and a small outlet aperture; the supporting seat comprises a fixing piece, a first conductive polar plate and a second conductive polar plate, the first conductive polar plate and the second conductive polar plate are fixedly installed on the fixing piece, a plurality of bending conductive rods are fixedly connected to the inner side of a hollow hole of the fixing piece, the first conductive polar plate and the second conductive polar plate are connected with an external power supply, and the bending conductive rods, the first conductive polar plate and the second conductive polar plate form sequential connection of a high-frequency electric field and an axial gradient electric field inside the open type cavity.
The long-shaft equal-diameter conducting rod is lower in manufacturing cost and more convenient to machine, assemble and maintain, but the minimum value of the diameter of an outlet is limited during manufacturing, so that the disadvantage of reducing the overall volume of the overall equipment is overcome;
by adopting the conical conducting rod structure, the manufacturing cost is higher than that of the conducting rod with the long shaft and the equal diameter, the processing, the assembly and the maintenance are slightly complicated, but the advantage that the diameter of an outlet can be infinitely small exists in theory, and the advantage is extremely obvious in the aspect of reducing the volume of the whole equipment;
by adopting the bent conducting rod, the ion beam at the entrance can be stabilized on the basis of adopting the conical conducting rod structure, so that better effects are brought to subsequent various processes, but the ion beam is weak in volume reduction and adopts the conical conducting structure.
Furthermore, when the multistage rod focusing structure comprises a plurality of conical conducting rods, the end faces of the conical conducting rods at the inlet are provided with first end faces which are distributed around the center axis in a central symmetry manner, each first end face is provided with an inclined face, and the inclined face and the end faces form a second end face with a smaller inclined face at one side close to the center axis;
or
When the multistage rod focusing structure comprises a plurality of bending conductive rods, the end face of each bending conductive rod at the inlet is provided with a first end face which is symmetrically distributed around the center of the central axis, and the inclined face and the end face form a second end face with a smaller relative inclined face at one side close to the central axis; the straight section is of a cylindrical structure or a conical structure, the bending section is of a cylindrical structure or a conical structure, and the bending conductive rods are freely combined with the structures.
Preferably, the tapered conducting rod or the bent conducting rod is integrally formed.
If great, then this terminal surface electric charge gathering is more, can produce certain hindrance effect to the entering of ion, consequently will be here near the terminal surface of axis and reduce as far as possible, can significantly reduce the repulsion of terminal surface electric charge to entering ion from this, can make more ions get into inside the toper spatial structure for final detection's result is more accurate, the concrete area of first terminal surface can be adjusted according to specific empirical data, simultaneously the toper conducting rod is integrated into one piece, for guaranteeing sufficient precision, needs to make with root material promptly.
Further, the aperture of the third through hole is smaller than the aperture of the second through hole, the aperture of the inlet is larger than the aperture of the second through hole, and the aperture of the outlet is larger than the aperture of the third through hole.
Further, the taper of the space symmetry structure is less than or equal to 30 degrees and greater than 0 degree.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of the focusing structure of the multi-stage rod of the present invention using the conductive rod with a long axis and an equal diameter;
FIG. 3 is a schematic view of the multi-stage focusing structure of the present invention using tapered conductive rods;
FIG. 4 is a schematic view of the tapered conductor bar of FIG. 3;
FIG. 5 is a schematic view of the multi-stage focusing structure of the bending conductive rod of the present invention;
FIG. 6 is a schematic view of the bending type conductive rod of FIG. 5;
FIG. 7 is an enlarged fragmentary view of FIG. 4, with the ends being similar to the corresponding ends of FIG. 6;
in FIG. 1, the ion source part A, the ion lens part B, the focusing part C, the analyzer part D, the detector part E, the downward arrows are vacuum-pumping, the first through hole A1, the first partition A2, the second through hole B1, the second partition B2, the third through hole C1, the third partition C2, the fourth through hole D1 and the fourth partition D2;
in fig. 2, 1 is a bent space structure, 2 is a bent conductive rod, 21 is a straight segment, 22 is a bent segment, 3 is a support base (fixing element), 32 is a first conductive plate, 33 is a second conductive plate, 11 is an inlet, 12 is an outlet, 211 is a first end face, and 212 is a second end face.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout; the embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "lateral", "vertical", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely 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 in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "coupled," "communicating," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly connected, integrally connected, or detachably connected; may be communication within two elements; can be directly connected or indirectly connected through an intermediate medium; the term "fit" can be a surface-to-surface fit, a point-to-surface or a line-to-surface fit, and also includes a hole-axis fit, and a person skilled in the art can understand the specific meaning of the above terms in the present invention in specific situations.
The utility model discloses a conceive as follows, the utility model provides a multistage pole ion focusing transmission equipment, have the little spatial structure of multistage pole entry macrostoma that ion beam entry bore is greater than ion beam exit bore through the adoption, can make the mechanism preparation simple and easy convenient, also can reduce certain cost simultaneously, more can improve the ion focusing ability, promote ultimate detectivity, simultaneously because the little spatial structure of this entry macrostoma of adoption, can be so that detect analysis part's entry size, not only can promote the precision that detects greatly, and can greatly reduced background noise, simultaneously owing to adopt this structure, can make whole equipment volume reduce more, simultaneously can make the cost also obtain reducing.
As shown, according to an embodiment of the present invention, a multi-stage rod ion focusing transmission apparatus includes an ion source part located in a first order, an ion lens part located in a second order, a focusing part located in a third order, an analyzer part located in a fourth order, and a detector part located in a fifth order, the ion source part and the ion lens part being installed with a first barrier provided with a first through hole for passing an ion beam generated by the ion source part therebetween, the ion lens part and the focusing part being installed with a second barrier provided with a second through hole for passing an ion beam focused by the ion lens therebetween, the focusing part and the analyzer part being installed with a third barrier provided with a third through hole for passing an ion beam focused by the focusing part therebetween, the analyzer part and the detector part being installed with a third barrier provided with a fourth through hole for passing an ion beam from the analyzer part therebetween A fourth separator; the ion lens component, the focusing component and the analyzer component are all connected with a vacuum system, an internal vacuum chamber is formed in the working state, a multi-stage rod ion focusing transmission component is installed in the focusing component, and the multi-stage rod ion focusing transmission component comprises a multi-stage rod focusing structure with a large inlet, a small outlet and a smooth and gradually-reduced diameter from the inlet caliber to the outlet caliber.
The ion source component emits ion beams, the ion beams enter a vacuum chamber in the ion lens component through a first through hole, the ion beams are focused by the ion lens component and then enter the vacuum chamber of the focusing component through a second through hole, gaps are reserved among the second partition plate, the inlet, the outlet and the third plate, the aperture of the second through hole is set according to the diameter formed by the ion beams, the ion beams are focused by the multi-stage rod focusing structure and then are emitted through the outlet, and the aperture of the third through hole is set according to the ion beams emitted from the outlet and enters the analyzer component and the fifth downstream detector component through the third through hole for analysis and detection.
In addition, according to the utility model discloses a multistage pole ion focusing transmission equipment still has following additional technical characteristics:
according to some embodiments of the present invention, the multistage rod focusing structure comprises a plurality of conductive rod members, and the conductive rod members form a space symmetric structure around the same central axis, in which an entrance aperture is large and an exit aperture is small; the conductive rods are fixedly connected in the hollow cavities of the supporting bases.
According to some embodiments of the present invention, the number of the conductive bars is 4 or 6 or 8.
Further, the conducting rod piece is a metal rod piece or a rod piece with a wrapped metal coating or a rod piece with a metal rod piece inside and an insulating coating outside.
According to some embodiments of the present invention, the multistage rod focusing structure comprises a plurality of long-axis equal-diameter conducting rods, the long-axis equal-diameter conducting rods form a spatially symmetrical structure around the same axis, and a long-axis equal-diameter conical structure with an entrance aperture larger than an exit aperture is formed; the supporting seats are provided with internal through holes, the long-axis constant-diameter conducting rods are fixedly connected to the inner sides of the through holes, the caliber of the outlet is greater than or equal to 2mm, the diameter of each long-axis constant-diameter conducting rod is greater than or equal to 1mm and less than or equal to 50mm, the supporting seats are connected with the long-axis constant-diameter conducting rods in a staggered mode, and an external power supply capable of forming a radio-frequency electric field and an axial gradient electric field in the conical structure with the long-axis conducting rods is connected;
or
According to some embodiments of the present invention, the multistage rod focusing structure comprises a plurality of tapered conductive rods and a supporting seat, the tapered conductive rods are distributed in a central symmetry around a central axis and form a tapered space structure with an open cavity therein, an inlet and an outlet are formed at two ends of the tapered space structure, and an inlet aperture is larger than an outlet aperture; the supporting seat comprises a fixing piece, a first conductive polar plate and a second conductive polar plate, the conical conductive rods, the first conductive polar plate and the second conductive polar plate form sequential connection of a high-frequency electric field and an axial gradient electric field in the open type cavity, the first conductive polar plate and the second conductive polar plate are fixedly installed on the fixing piece, the conical conductive rods are fixedly connected to the inner side of a hollow hole of the fixing piece, and the first conductive polar plate and the second conductive polar plate are connected with an external power supply.
Or
According to some embodiments of the present invention, the multistage rod focusing structure includes a plurality of bending conductive rods, a supporting seat, and a plurality of bending conductive rods, the bending conductive rods are distributed in a central symmetrical manner around the central axis and form a bending space structure with an open chamber therein, the bending conductive rods include a straight section and a bending section, the straight section is a cylindrical structure or a conical structure, the bending section is a cylindrical structure or a conical structure, the top end surface of the straight section is the bottom end surface of the bending section, the top end of the bending section is converged towards the central axis to form a central symmetrical distribution structure around the central axis, and the bending space structure forms a bending space structure with a large inlet aperture and a small outlet aperture; the supporting seat comprises a fixing piece, a first conductive polar plate and a second conductive polar plate, the first conductive polar plate and the second conductive polar plate are fixedly installed on the fixing piece, a plurality of bending conductive rods are fixedly connected to the inner side of a hollow hole of the fixing piece, the first conductive polar plate and the second conductive polar plate are connected with an external power supply, and the bending conductive rods, the first conductive polar plate and the second conductive polar plate form sequential connection of a high-frequency electric field and an axial gradient electric field inside the open type cavity.
The long-shaft equal-diameter conducting rod is lower in manufacturing cost and more convenient to machine, assemble and maintain, but the minimum value of the diameter of an outlet is limited during manufacturing, so that the disadvantage of reducing the overall volume of the overall equipment is overcome;
by adopting the conical conducting rod structure, the manufacturing cost is higher than that of the conducting rod with the long shaft and the equal diameter, the processing, the assembly and the maintenance are slightly complicated, but the advantage that the diameter of an outlet can be infinitely small exists in theory, and the advantage is extremely obvious in the aspect of reducing the volume of the whole equipment;
by adopting the bent conducting rod, the ion beam at the entrance can be stabilized on the basis of adopting the conical conducting rod structure, so that better effects are brought to subsequent various processes, but the ion beam is weak in volume reduction and adopts the conical conducting structure.
According to some embodiments of the present invention, when the multistage rod focusing structure includes a plurality of tapered conductive rods, the end surface of the tapered conductive rod at the inlet has a first end surface symmetrically distributed around the center axis, the first end surface has an inclined surface, and the inclined surface and the end surface form a second end surface with a smaller relative inclined surface on a side close to the center axis;
or
According to some embodiments of the present invention, when the multistage rod focusing structure includes a plurality of bending conductive rods, the end surface of the bending conductive rod at the inlet has a first end surface symmetrically distributed around the central axis, and the inclined surface and the end surface form a second end surface with a smaller relative inclined surface on a side close to the central axis; the straight section is of a cylindrical structure or a conical structure, the bending section is of a cylindrical structure or a conical structure, and the bending conductive rods are freely combined with the structures.
Preferably, the tapered conducting rod or the bent conducting rod is integrally formed.
If great, then this terminal surface electric charge gathering is more, can produce certain hindrance effect to the entering of ion, consequently will be here near the terminal surface of axis and reduce as far as possible, can significantly reduce the repulsion of terminal surface electric charge to entering ion from this, can make more ions get into inside the toper spatial structure for final detection's result is more accurate, the concrete area of first terminal surface can be adjusted according to specific empirical data, simultaneously the toper conducting rod is integrated into one piece, for guaranteeing sufficient precision, needs to make with root material promptly.
According to the utility model discloses a some embodiments, in the type conducting rod of bending the straight section is cylinder type structure or toper structure, and the section of shown bending is cylinder type structure or toper structure, the type conducting rod of bending is the independent assortment of above-mentioned structure.
According to the utility model discloses an embodiment, straight section is the cylinder type, the section of bending is the cylinder type, and the space electric field in straight section this moment is even, and the section of bending space electric field can strengthen because the gradual diminishing of space bore, nevertheless the exit aperture can be because cylinder type terminal surface homogeneous can't further reduce, and bore size can receive the restriction promptly.
According to the utility model discloses an embodiment, straight section is the cylinder type, the section of bending is the circular cone type, and the space electric field in straight section this moment is even, and the section of bending space electric field can be because the gradual diminishing of space bore and reinforcing, simultaneously because circular cone type member self cross section size also dwindles, also can cause the reinforcing of corresponding field intensity, simultaneously, the export bore can further dwindle, theoretically can infinitely little, and this can be very big improvement exit's environment, and concrete digital accessible experiment is confirmed.
According to the utility model discloses an embodiment, straight section is the circular cone type, the section of bending is the cylinder type, in this embodiment, straight section toper structural change then needs gently to do benefit to the stability that gets into the air current at a high speed, the section of bending then can be adjusted according to actual need, and its main function is for ion focusing.
According to the utility model discloses an embodiment, straight section is the circular cone type, the section of bending is the circular cone type, in this embodiment, straight section toper structural change then needs gently to do benefit to the stability of high-speed entering air current, and straight section self tapering and straight section angle are confirmed according to actual need, and the section of bending then can be adjusted according to actual need, in this embodiment, the bore of export also can be infinitely little in theory, and its primary function is for ion focusing.
According to the utility model discloses an embodiment, third through-hole bore is less than the second through-hole bore, the entry bore is greater than the second through-hole bore, the exit aperture is greater than the third through-hole bore.
According to some embodiments of the present invention, the taper of the space symmetric structure is less than or equal to 30 degrees and greater than 0 degree.
Any reference to "one embodiment," "an embodiment," "example embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention; the schematic representations in various places in the specification do not necessarily refer to the same embodiment; further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature, structure, or characteristic in connection with other ones of the embodiments.
While the invention has been described in detail with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention; in particular, reasonable variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the foregoing disclosure, the drawings and the appended claims without departing from the spirit of the invention; except variations and modifications in the component parts and/or arrangements, the scope of which is defined by the appended claims and equivalents thereof.
Claims (9)
1. A multi-stage rod ion focusing transport apparatus comprising an ion source component in a first order, an ion lens component in a second order, a focusing component in a third order, an analyzer component in a fourth order and a detector component in a fifth order, a first barrier plate provided with a first through hole for an ion beam generated by the ion source part is installed between the ion source part and the ion lens part, a second partition plate provided with a second through hole through which the ion beam focused by the ion lens passes is installed between the ion lens part and the focusing part, a third diaphragm provided with a third through hole for the ion beam focused by the focusing unit is installed between the focusing unit and the analyzer unit, a fourth diaphragm provided with a fourth through hole through which the ion beam from the analyzer unit passes is installed between the analyzer unit and the detector unit; the ion lens component, the focusing component and the analyzer component are connected with a vacuum system, an internal vacuum chamber is formed in a working state, a multi-stage rod ion focusing transmission component is installed in the focusing component, and the multi-stage rod ion focusing transmission component comprises a multi-stage rod focusing structure with a large inlet, a small outlet and a smooth and gradually-reduced diameter from the inlet caliber to the outlet caliber;
the ion source component emits ion beams, the ion beams enter a vacuum chamber in the ion lens component through a first through hole, the ion beams are focused by the ion lens component and then enter the vacuum chamber of the focusing component through a second through hole, gaps are reserved among the second partition plate, the inlet, the outlet and the third plate, the aperture of the second through hole is set according to the diameter formed by the ion beams, the ion beams are focused by the multi-stage rod focusing structure and then are emitted through the outlet, and the aperture of the third through hole is set according to the ion beams emitted from the outlet and enters the analyzer component and the fifth downstream detector component through the third through hole for analysis and detection.
2. The multi-stage rod ion focusing transmission device according to claim 1, wherein the multi-stage rod focusing structure comprises a plurality of conductive rod pieces, and the conductive rod pieces form a spatially symmetrical structure with a large entrance aperture and a small exit aperture around the same central axis; the conductive rods are fixedly connected in the hollow cavities of the supporting bases.
3. The multi-stage rod ion focusing transmission apparatus according to claim 2, wherein said conductive rod members are 4, 6 or 8.
4. The multi-stage ion focusing transmission apparatus according to claim 2, wherein said conductive rod is a metal rod or a rod with a metal coating or a rod with an insulating coating on the inside of the metal rod.
5. The multi-stage rod ion focusing transmission device according to claim 2, wherein the multi-stage rod focusing structure comprises a plurality of long-axis equal-diameter conducting rods, the long-axis equal-diameter conducting rods form a spatially symmetrical structure around the same axis to form a long-axis equal-diameter conical structure with an inlet aperture larger than an outlet aperture; the supporting seats are provided with internal through holes, the long-axis constant-diameter conducting rods are fixedly connected to the inner sides of the through holes, the caliber of the outlet is greater than or equal to 2mm, the diameter of each long-axis constant-diameter conducting rod is greater than or equal to 1mm and less than or equal to 50mm, the supporting seats are connected with the long-axis constant-diameter conducting rods in a staggered mode, and an external power supply capable of forming a radio-frequency electric field and an axial gradient electric field in the conical structure with the long-axis conducting rods is connected;
or
The multistage rod focusing structure comprises a plurality of conical conducting rods and a supporting seat, the conical conducting rods are distributed in a central symmetry mode around a central axis and form a conical space structure with an open cavity inside, an inlet and an outlet are formed at two ends of the conical space structure, and the diameter of the inlet is larger than that of the outlet; the supporting seat comprises a fixing piece, a first conductive polar plate and a second conductive polar plate, the conical conductive rods, the first conductive polar plate and the second conductive polar plate form sequential connection of a high-frequency electric field and an axial gradient electric field in the open type cavity, the first conductive polar plate and the second conductive polar plate are fixedly arranged on the fixing piece, the conical conductive rods are fixedly connected to the inner side of a hollow hole of the fixing piece, and the first conductive polar plate and the second conductive polar plate are connected with an external power supply;
or
The multistage rod focusing structure comprises a plurality of bending conductive rods and a supporting seat, the bending conductive rods are distributed in a central symmetry mode around a central axis and form a bending space structure with an open cavity inside, each bending conductive rod comprises a straight section and a bending section, the straight section is of a cylindrical structure or a conical structure, the bending section is of a cylindrical structure or a conical structure, the top end face of the straight section is the bottom end face of the bending section, the top ends of the bending sections are converged towards the central axis to form a central symmetry distribution structure around the central axis, and the bending space structure forms a bending space structure with a large inlet aperture and a small outlet aperture; the supporting seat comprises a fixing piece, a first conductive polar plate and a second conductive polar plate, the first conductive polar plate and the second conductive polar plate are fixedly installed on the fixing piece, a plurality of bending conductive rods are fixedly connected to the inner side of a hollow hole of the fixing piece, the first conductive polar plate and the second conductive polar plate are connected with an external power supply, and the bending conductive rods, the first conductive polar plate and the second conductive polar plate form sequential connection of a high-frequency electric field and an axial gradient electric field inside the open type cavity.
6. The multi-stage rod ion focusing transmission device according to claim 5, wherein when the multi-stage rod focusing structure comprises a plurality of tapered conducting rods, the end surfaces of the tapered conducting rods at the inlet have first end surfaces which are symmetrically distributed around the central axis, the first end surfaces have inclined surfaces, and the inclined surfaces and the end surfaces form second end surfaces with smaller relative inclined surfaces on the side close to the central axis;
or
When the multistage rod focusing structure comprises a plurality of bending conductive rods, the end face of each bending conductive rod at the inlet is provided with a first end face which is symmetrically distributed around the center of the central axis, and the inclined face and the end face form a second end face with a smaller relative inclined face at one side close to the central axis; the straight section is of a cylindrical structure or a conical structure, the bending section is of a cylindrical structure or a conical structure, and the bending conductive rods are freely combined with the structures.
7. The multi-stage rod ion focusing transmission apparatus of claim 6, wherein the tapered conductive rod or the bent conductive rod is integrally formed.
8. The multi-stage rod ion focusing transmission apparatus according to claim 1, wherein the aperture of the third through hole is smaller than the aperture of the second through hole, the aperture of the inlet is larger than the aperture of the second through hole, and the aperture of the outlet is larger than the aperture of the third through hole.
9. The multi-stage rod ion focusing transmission apparatus of claim 2, wherein the taper of said spatially symmetric structure is equal to or less than 30 degrees and greater than 0 degrees.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920479347.7U CN209843657U (en) | 2019-04-10 | 2019-04-10 | Multistage rod ion focusing transmission equipment |
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| CN201920479347.7U CN209843657U (en) | 2019-04-10 | 2019-04-10 | Multistage rod ion focusing transmission equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109841490A (en) * | 2019-04-10 | 2019-06-04 | 江苏天瑞仪器股份有限公司 | A kind of multistage bar ion focusing transmission device |
| CN115831704A (en) * | 2023-02-23 | 2023-03-21 | 杭州凯莱谱精准医疗检测技术有限公司 | Mass spectrometry apparatus comprising a segmented graded ion transport channel |
-
2019
- 2019-04-10 CN CN201920479347.7U patent/CN209843657U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109841490A (en) * | 2019-04-10 | 2019-06-04 | 江苏天瑞仪器股份有限公司 | A kind of multistage bar ion focusing transmission device |
| CN115831704A (en) * | 2023-02-23 | 2023-03-21 | 杭州凯莱谱精准医疗检测技术有限公司 | Mass spectrometry apparatus comprising a segmented graded ion transport channel |
| CN115831704B (en) * | 2023-02-23 | 2023-05-26 | 杭州凯莱谱精准医疗检测技术有限公司 | Mass spectrometer apparatus having a segmented graded ion transport channel |
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