CN102522308B - Ion mobility spectrometer and ion collection device thereof - Google Patents
Ion mobility spectrometer and ion collection device thereof Download PDFInfo
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- CN102522308B CN102522308B CN201110438896.8A CN201110438896A CN102522308B CN 102522308 B CN102522308 B CN 102522308B CN 201110438896 A CN201110438896 A CN 201110438896A CN 102522308 B CN102522308 B CN 102522308B
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Abstract
The invention provides an ion mobility spectrometer and an ion collection device thereof. The ion collection device comprises a restraining grid mesh, a first electrode and an iron collector, wherein the restraining grid mesh is used for restraining influences of ionic migration in a migration area on ion collection, the first electrode is arranged on the lower side of the restraining grid mesh in the ionic migration direction and mechanically and electrically connected with the restraining grid mesh, and the ion collector is used for collecting ions and comprises an ion collection portion. A space is formed in the first electrode, and the ion collection portion of the ion collector is arranged in the space formed in the first electrode. The restraining grid mesh and the first electrode are equipotential and form a focusing electric field with the ion collection portion, so that ions entering the collection area cannot be scattered on a shield, and collection efficiency is improved.
Description
The application is the divisional application of the patent application that application number is 200910088634.6, the applying date is on June 30th, 2009, denomination of invention is " collection device of ion of ionic migration spectrometer and ionic migration spectrometer ".
Technical field
The present invention relates to a kind of ionic migration spectrometer, more particularly the present invention relates to a kind of collection device of ion of ionic migration spectrometer.
Background technology
Referring to Fig. 1 and 2, ionic migration spectrometer comprise collection device of ion 50 ', this collection device of ion 50 ' comprise for suppress the inhibition aperture plate 15 of migration area ion travel motion on ioncollection impact ', for the Faraday plate 17 of collection of ions ', for fixing Faraday plate 17 ' insulating part 2, and the radome 21 being connected with insulating part 2 '.In addition, this ionic migration spectrometer also comprises for amplifying from the amplifying circuit of the analog signal of Faraday plate 17 ' output, and amplifying circuit is by wire 6 and Faraday plate 17 ' be connected, and this amplifying circuit comprises analog signal.This ionic migration spectrometer also comprises the migration electrode supply that is used to migration electrode that power supply is provided, and this migration electrode supply has the lead-out terminal of ground connection, and the lead-out terminal of this ground connection forms the ground connection of migration electrode.Radome 21 ' be connected and be connected with the ground that is migration electrode power supply by electric wire 7 by the screen 5 of coaxial cable and the analog signal of amplifying circuit ground.The ion of migration area is through suppressing aperture plate 15 ' by Faraday plate 17 ' collection, Faraday plate 17 ' export by the coaxial cable being made up of heart yearn 5 and screen 6.
For said structure, ion enters collecting region, suppress aperture plate 15 ' with the electric field action of radome 21 ' formation under, ion flies to radome 21 ' and lose, thereby affects collection rate.
In the example depicted in fig. 1, taked plane suppress aperture plate 15 ', and be arranged on suppress aperture plate 15 ', the Faraday plate 17 in the downstream of ion migratory direction '.The shortcoming of this structure is, ion can scatter to radome 21 ' upper, can have influence on thus collection rate.
In example as shown in Figure 2, suppress aperture plate 15 ' be spherical, suppress thus aperture plate 17 ' can focus on ion, but net shape inhibition aperture plate 15 ' processing cost higher.
In addition, in above-mentioned prior art, exist for migration electrode power supply high pressure with analog signal in the problem of radome 21 ' altogether, the noise on high pressure ground can be directly coupled to amplifying circuit,, on front-end circuit, has affected ionic migration spectrometer performance.
Summary of the invention
In order to alleviate at least in part above-mentioned problems of the prior art, the object of this invention is to provide a kind of collection device of ion of ionic migration spectrometer, and ionic migration spectrometer, this collection device of ion and ionic migration spectrometer can improve ioncollection efficiency with simple structure.
According to an aspect of the present invention, the invention provides a kind of collection device of ion of ionic migration spectrometer.Collection device of ion comprises: for suppressing the inhibition aperture plate of migration area ion travel motion on ioncollection impact; And be arranged on and suppress first electrode in downstream aperture plate, ion migratory direction, this first electrode is with inhibition aperture plate mechanical connection and be electrically connected.
According to a further aspect in the invention, this collection device of ion can also comprise: for the ioncollection part of collection of ions, this ioncollection part comprises ioncollection part, wherein this first electrode forms space therein, and the ioncollection part of described ioncollection part is arranged in the space of inside formation of this first electrode.
According to a further aspect in the invention, the collection device of ion of described ionic migration spectrometer also comprises: be arranged on second electrode in downstream described the first electrode, ion migratory direction, this second electrode is configured for making ion in ionic migration spectrometer, to carry out the grounding electrode in the migration electrode of travel motion.
According to a further aspect in the invention, collection device of ion also comprises: be arranged on the first insulating part this first electrode and between second, this ioncollection part is connected in described the first insulating part.
According to a further aspect in the invention, collection device of ion also comprises: be arranged on the radome in downstream described the second electrode, ion migratory direction, this radome and described the second electrode gap are opened.
According to a further aspect in the invention, wherein said suppressor netting gear has substantially flat shape.
According to a further aspect in the invention, wherein said the first electrode has the shape of ring-type substantially.
According to a further aspect in the invention, wherein said the second electrode has the shape of ring-type substantially.
According to a further aspect in the invention, collection device of ion also comprises: be arranged on second insulating part in the downstream of the ion migratory direction of described the second electrode, this radome and described the second electrode are spaced apart by described the second insulating part.
According to a further aspect in the invention, wherein said ioncollection part also comprises the segment signal output being connected with this ioncollection part, and wherein said radome is suitable for being connected with first conductive layer in the heart yearn outside of coaxial cable, the heart yearn of this coaxial cable is connected with the segment signal output of this ioncollection part, for from segment signal output output signal.
According to a further aspect in the invention, wherein said the first electrode and the second electrode coaxial setting substantially.
According to a further aspect in the invention, wherein said the first insulating part has the shape of general plate or the shape of plate-like.
According to a further aspect in the invention, wherein said the first insulating part has central through hole at core, and the segment signal output of ioncollection part stretches out by this central through hole, and described the first insulating part also comprises the multiple through holes around described centre bore.
In accordance with a further aspect of the present invention, the invention provides a kind of ionic migration spectrometer, this ionic migration spectrometer comprises: for the ioncollection district part of collection of ions; And be arranged on the collection device of ion of described ioncollection district part, wherein this collection device of ion comprises: for the ioncollection part of collection of ions, this ioncollection part comprises ioncollection part; For suppressing the inhibition aperture plate of migration area ion travel motion on ioncollection impact; Be arranged on the first electrode that suppresses downstream aperture plate, ion migratory direction, this first electrode with suppress aperture plate mechanical connection and being electrically connected, wherein this first electrode forms space therein, and the ioncollection part of described ioncollection part is arranged in the space of inside formation of this first electrode; And being arranged on first insulating part in downstream this first electrode, ion migratory direction, this ioncollection part is connected in described the first insulating part.
According to a further aspect in the invention, ionic migration spectrometer also comprises: be arranged on second electrode in downstream described the first insulating part, ion migratory direction, this second electrode is configured for making ion in ionic migration spectrometer, to carry out the grounding electrode in the migration electrode of travel motion.
According to a further aspect in the invention, ionic migration spectrometer also comprises: be arranged on the radome in downstream described the second electrode, ion migratory direction, this radome and described the second electrode gap are opened.
According to a further aspect in the invention, wherein said suppressor netting gear has substantially flat shape.
According to a further aspect in the invention, wherein said the first electrode has the shape of ring-type substantially.
According to a further aspect in the invention, wherein said ioncollection part also comprises the segment signal output being connected with this ioncollection part.
According to a further aspect in the invention, first conductive layer in the heart yearn outside of wherein said radome and coaxial cable is connected, and the heart yearn of this coaxial cable is connected with the segment signal output of this ioncollection part, for from segment signal output output signal.
According to a further aspect in the invention, ionic migration spectrometer also comprises: amplifying circuit, the input of this amplifying circuit receives from the signal of described segment signal output output by the heart yearn of described coaxial cable, and described radome is by the first conductive layer of described coaxial cable and being connected in analog of amplifying circuit.
According to a further aspect in the invention, wherein: described the second electrode is connected to amplifying circuit in analog at the output end of described amplifying circuit.
According to a further aspect in the invention, ionic migration spectrometer also comprises: for shielding the amplifying circuit screening can of amplifying circuit; And the external conductive casing of ioncollection district part, wherein said coaxial cable comprises the second conductive layer that is arranged on the first conductive layer outside, this second conductive layer connects the external conductive casing of amplifying circuit screening can and ioncollection district part.
According to a further aspect in the invention, ionic migration spectrometer also comprises: be used to migration electrode that the migration electrode supply of power supply is provided, migration electrode supply has migration electrode supply screening can, described migration electrode supply has the lead-out terminal of ground connection, this ground connection lead-out terminal is connected with the second electrode, and is connected to described amplifying circuit in analog at the output end of amplifying circuit.
By some embodiments of the present invention, can effectively improve the collection of ion, and facilitate drawing of signal, improve signal to noise ratio.
Brief description of the drawings
Fig. 1 is the schematic diagram of the collection device of ion of the ionic migration spectrometer of prior art.
The schematic diagram of the collection device of ion of the ionic migration spectrometer of another prior art of Fig. 2.
Fig. 3 is according to the schematic diagram of the collection device of ion of the ionic migration spectrometer of the embodiment of the present invention;
Fig. 4 is according to the schematic section of the inhibition aperture plate of the collection device of ion of the ionic migration spectrometer of the embodiment of the present invention.
Fig. 5 is according to the schematic front view of the inhibition aperture plate of the collection device of ion of the ionic migration spectrometer of the embodiment of the present invention.
Fig. 6 is according to the schematic sectional view of the first electrode of the collection device of ion of the ionic migration spectrometer of the embodiment of the present invention.
Fig. 7 is according to the schematic front view of the first electrode of the collection device of ion of the ionic migration spectrometer of the embodiment of the present invention.
Fig. 8 is according to the schematic front view of the ioncollection part of the collection device of ion of the ionic migration spectrometer of the embodiment of the present invention.
Fig. 9 is according to the schematic sectional view of the ioncollection part of the collection device of ion of the ionic migration spectrometer of the embodiment of the present invention.
Figure 10 is according to the schematic sectional view of the first insulating part of the collection device of ion of the ionic migration spectrometer of the embodiment of the present invention.
Figure 11 is according to the schematic front view of the first insulating part of the collection device of ion of the ionic migration spectrometer of the embodiment of the present invention.
Figure 12 is according to the schematic sectional view of the second electrode piece of the collection device of ion of the ionic migration spectrometer of the embodiment of the present invention.
Figure 13 is according to the schematic front view of the second electrode piece of the collection device of ion of the ionic migration spectrometer of the embodiment of the present invention.
Figure 14 is according to the schematic sectional view of the second insulating part of the collection device of ion of the ionic migration spectrometer of the embodiment of the present invention.
Figure 15 is according to the schematic front view of the second insulating part of the collection device of ion of the ionic migration spectrometer of the embodiment of the present invention.
Figure 16 is according to the schematic section of the radome of the collection device of ion of the ionic migration spectrometer of the embodiment of the present invention.
Figure 17 is according to the schematic front view of the radome of the collection device of ion of the ionic migration spectrometer of the embodiment of the present invention.
Embodiment
Below in conjunction with the drawings and the specific embodiments, the present invention will be further described.
As shown in Figure 3, in some embodiments of the invention, ionic migration spectrometer comprises according to an embodiment of the invention: for the ioncollection district part 90 of collection of ions; And be arranged on the collection device of ion 50 of described ioncollection district part 90.
As shown in Figure 3, ionic migration spectrometer 10 can also comprise according to an embodiment of the invention: amplification circuits 60, and be used to migration electrode that the migration electrode supply 70 of power supply is provided.
As shown in Figure 3, the collection device of ion 50 of ionic migration spectrometer comprises according to an embodiment of the invention: for suppressing the inhibition aperture plate 15 of migration area ion travel motion on ioncollection impact; And being arranged on the first electrode 16 that suppresses aperture plate or downstream suppressor 15, ion migratory direction 80 (, the right side in Fig. 3), this first electrode 16 is with inhibition aperture plate 15 mechanical connections and be electrically connected.
In some embodiments of the invention, as shown in Fig. 3,6,7,8,9, the collection device of ion 50 of ionic migration spectrometer also comprises the ioncollection part 17 for collection of ions according to an embodiment of the invention, and this ioncollection part 17 comprises ioncollection part 171.This first electrode 16 forms space 161 therein, and the ioncollection part 171 of described ioncollection part 17 is arranged in the space 161 of inside formation of this first electrode 16.
In other embodiment of the present invention, the ioncollection part 171 of described ioncollection part 17 is not arranged in the space 161 of inside formation of this first electrode 16, and outside the space 161 that the inside that is arranged on the first electrode 16 forms, for example adjacent with the first electrode 16, or the distance certain with the first electrode 16 intervals.
In some embodiments of the invention, as shown in Fig. 3,6,7,8,9, the collection device of ion 50 of ionic migration spectrometer also comprises according to an embodiment of the invention; Be arranged on first insulating part 18 in downstream this first electrode 16, ion migratory direction 80, this ioncollection part 17 is connected in described the first insulating part 18.
In other embodiment of the present invention, the ioncollection part 17 of the collection device of ion 50 of ionic migration spectrometer can be fixed on other parts of collecting region of ionic migration spectrometer or on insulating part.As selection, the ioncollection part 17 of collection device of ion 50 can be fixed on ionic migration spectrometer, well known in the art, any suitable parts.Ioncollection part 17 can be the ioncollection part of any suitable shape.
According to some embodiments of the present invention, as shown in Figure 3, the collection device of ion 50 of described ionic migration spectrometer can also comprise: be arranged on second electrode 19 in downstream described the first insulating part 18, ion migratory direction 80, this second electrode 19 is configured for making ion in ionic migration spectrometer, to carry out the grounding electrode in the migration electrode of travel motion., the second electrode 19 is connected with the ground of follow-up high-tension circuit as high pressure ground HGND.
According to some embodiments of the present invention, as shown in Figure 3, the collection device of ion 50 of described ionic migration spectrometer can also comprise: be arranged on the radome 21 in downstream described the second electrode 19, ion migratory direction, this radome 21 is spaced apart with described the second electrode 19.A kind of example of radome 21 is shown in Figure 16-17.
In some embodiments of the invention, as shown in Figure 3, described radome 21 is connected in analog as analog signal ground AGND and follow-up circuit, is connected with the single-point in analog in amplifier rear end side in analog high pressure.
According to some embodiments of the present invention, the collection device of ion 50 of described ionic migration spectrometer can not comprise the second electrode 19.In this case, for example, collection device of ion 50 can directly connect radome 21 on the first insulating part 18.
According to some embodiments of the present invention, as shown in Fig. 4,5, described inhibition aperture plate 15 can have substantially flat shape, or flat shape.In addition, in one embodiment, as shown in Fig. 4,5, described inhibition aperture plate 15 can be electrically connected with the net 152 of the conduction of mechanical connection and form by the ring-shaped article 151 conducting electricity with the ring-shaped article 151 of conduction.As selection, described inhibition aperture plate 15 can only be made up of conductive mesh.
According to some embodiments of the present invention, as shown in Fig. 6 and 7, described the first electrode 16 can have the shape of ring-type substantially.In addition, the first electrode 16 of ring-type can have the inner surface of taper surface substantially, the inner surface on the face of cylinder, the various suitable inner surfaces such as paraboloidal inner surface substantially.The inner surface on the face of cylinder has substantially been shown in Fig. 6 and 7, or the columned inner space 161 of cardinal principle.
According to some embodiments of the present invention, as shown in Figure 12 and 13, described the second electrode 19 can have the shape of ring-type substantially.In addition, the second electrode 19 of ring-type can have the inner surface of taper surface substantially, the inner surface on the face of cylinder, the various suitable inner surfaces such as paraboloidal inner surface substantially.The second electrode 19 can be the disc shaped that is provided with through hole, and through hole is connected with ioncollection part 17 for holding wire.The inner surface on the face of cylinder has substantially been shown in Figure 12 and 13.In addition, the second electrode 19 can be any suitable, well known in the art, make ion in ionic migration spectrometer, carry out the migration electrode of travel motion.
According to some embodiments of the present invention, as shown in Figure 3, the collection device of ion 50 of described ionic migration spectrometer can also comprise: be arranged on second insulating part 20 in the downstream of the ion migratory direction 80 of described the second electrode 19, this radome 21 is spaced apart by described the second insulating part 20 with described the second electrode 19.
Described the second insulating part 20 can have the tubular shape shown in Figure 14 and 15, sheet shaped piece, or any other suitable shape.This radome 21 can pass through suitable space, interval with described the second electrode 19, or utilizes the insulating barrier on that is formed in this radome 21 and described the second electrode 19 to separate.In addition, this radome 21 can be separated by any suitable alternate manner in this area with described the second electrode 19.For example, the thickness of the second described insulating part can be less than 0.5 millimeter.
According to some embodiments of the present invention, as shown in Fig. 3,8,9, described ioncollection part 17 also comprises the segment signal output 172 being connected with this ioncollection part 171; And described radome 21 is suitable for being connected with first conductive layer 232 in heart yearn 231 outsides of coaxial cable 23, the heart yearn 23 of this coaxial cable 23 is connected with the segment signal output 172 of this ioncollection part 17, for from segment signal output 172 output signals.
According to some embodiments of the present invention, as shown in Figure 3, described the first electrode 16 and the second electrode 19 can coaxially arrange substantially.As selection, described the first electrode 16 and the second electrode 19 can adopt other suitable mode to arrange, and for example described the first electrode 16 and the second electrode 19 can disalignment settings.
According to some embodiments of the present invention, as shown in Figure 10,11, described the first insulating part 18 can have multiple through holes.As selection, as shown in Figures 10 and 11, described the first insulating part 18 has central through hole 181 at core, and the segment signal output 172 of ioncollection part 17 stretches out by this central through hole 181, and described the first insulating part 18 also comprises the multiple through holes 182 around described central through hole 181.
According to some embodiments of the present invention, as shown in Figure 3, this amplification circuits 60 comprises amplifying circuit 63.The input 62 of amplifying circuit 63 receives the signal of exporting from described segment signal output 172 by the heart yearn 231 of described coaxial cable 23,26 being connected in analog of first conductive layer 232 of described radome 21 by described coaxial cable 23 and amplifying circuit 63.
In some embodiments of the invention, as shown in Figure 3, described the second electrode 19 is connected in analog 26 of amplifying circuit 63 in output 61 sides of described amplifying circuit 63.
In some embodiments of the invention, as shown in Figure 3, described ionic migration spectrometer can also comprise: for shielding the amplifying circuit screening can 25 of amplifying circuit; And the external conductive casing 22 of ioncollection district part 90.Described coaxial cable 23 comprises the second conductive layer 232 that is arranged on the first conductive layer 231 outsides, and this second conductive layer 232 connects the external conductive casing 22 of amplifying circuit screening can 25 and ioncollection district part.
In some embodiments of the invention, as shown in Figure 3, described migration electrode supply 70 has lead-out terminal 73 and the High voltage output terminal 72 of ground connection, this ground connection lead-out terminal 73 is connected with the second electrode 19 by wire 28, and is connected in analog 26 of described amplifying circuit 63 in output 61 sides of amplifying circuit 63.As shown in Figure 3, migration electrode supply 70 also has migration electrode supply screening can 27, and screening can 27 is connected with the shell 22 of ioncollection district part 90 by wire 24.Wire 24 forms coaxial cable with wire 28, and coaxial cable 23 is triaxial cables, as shown in Figure 3.
In some embodiments of the invention, the insulation of described triaxial cable and sheath material are polytetrafluoroethylene.
Owing to taking above structure, suppress aperture plate 15 and the first electrode 16 in equipotential, and form focusing electric field between Faraday plate as ioncollection part 17, the ion that enters collecting region can not scatter on radome 21, has improved collection rate.
In addition, in some embodiments of the invention, the second electrode 19 and radome 21 electrically separate, make high pressure with analog signal before the sensitiveest amplifying circuit separately, being connected in analog of position after signal amplifies, reduce the impact that high-voltage ground wire noise amplifies signal.
In addition, can form focusing structure owing to suppressing aperture plate 15 and the first electrode 16, can the Faraday plate as ioncollection part 17 be done littlely towards the area of ion flight.
In addition, in some embodiments of the invention, the second insulating part 20 is cellular, be provided with the second electrode 19, and Faraday plate and radome 21 as ioncollection part 17 are distant, can effectively reduce thus the electric capacity between Faraday plate and radome 21, reduce the junction capacitance noise of front-end circuit.
In addition, in some embodiments of the invention, the second electrode 19 and radome 21, in equipotential, have improved signal to noise ratio in the case of not reducing the screening ability of radome 21.
Claims (21)
1. a collection device of ion for ionic migration spectrometer, comprising:
For suppressing the inhibition aperture plate of migration area ion travel motion on ioncollection impact;
Be arranged on and suppress first electrode in downstream aperture plate, ion migratory direction, this first electrode is with inhibition aperture plate mechanical connection and be electrically connected;
For the ioncollection part of collection of ions, this ioncollection part comprises ioncollection part,
Wherein this first electrode forms space therein, and the ioncollection part of described ioncollection part is arranged in the space of inside formation of this first electrode,
The collection device of ion of described ionic migration spectrometer also comprises:
Be arranged on second electrode in downstream described the first electrode, ion migratory direction, this second electrode is configured for making ion in ionic migration spectrometer, to carry out the grounding electrode in the migration electrode of travel motion; And
Be arranged on this first electrode and the second electrode between the first insulating part, this ioncollection part is connected in described the first insulating part,
Described ionic migration spectrometer comprises:
Be used to the migration electrode of ionic migration spectrometer that the migration electrode supply of power supply is provided, described migration electrode supply has the lead-out terminal of ground connection, and this ground connection lead-out terminal is connected with the second electrode.
2. the collection device of ion of ionic migration spectrometer according to claim 1, also comprises:
Be arranged on the radome in downstream described the second electrode, ion migratory direction, this radome and described the second electrode gap are opened.
3. the collection device of ion of ionic migration spectrometer according to claim 1, wherein said suppressor netting gear has flat shape.
4. the collection device of ion of ionic migration spectrometer according to claim 3, wherein:
Suppress aperture plate and the first electrode in equipotential, and form focusing electric field between ioncollection part.
5. the collection device of ion of ionic migration spectrometer according to claim 1, wherein said the first electrode has the shape of ring-type.
6. the collection device of ion of ionic migration spectrometer according to claim 1, wherein said the second electrode has the shape of ring-type.
7. the collection device of ion of ionic migration spectrometer according to claim 2, also comprises:
Be arranged on second insulating part in the downstream of the ion migratory direction of described the second electrode, this radome and described the second electrode are spaced apart by described the second insulating part.
8. the collection device of ion of ionic migration spectrometer according to claim 2,
Wherein said ioncollection part also comprises the segment signal output being connected with this ioncollection part; And
Wherein said radome is suitable for being connected with first conductive layer in the heart yearn outside of coaxial cable, and the heart yearn of this coaxial cable is connected with the segment signal output of this ioncollection part, for from segment signal output output signal.
9. the collection device of ion of ionic migration spectrometer according to claim 6, wherein said the first electrode has the shape of ring-type, and described the first electrode and the second electrode coaxially arrange.
10. the collection device of ion of ionic migration spectrometer according to claim 1, wherein said the first insulating part has tabular shape or the shape of plate-like.
The collection device of ion of 11. ionic migration spectrometers according to claim 10, wherein said the first insulating part has multiple through holes.
12. 1 kinds of ionic migration spectrometers, comprising:
For the ioncollection district part of collection of ions; And
Be arranged on the collection device of ion of described ioncollection district part,
Wherein this collection device of ion comprises:
For suppressing the inhibition aperture plate of migration area ion travel motion on ioncollection impact;
Be arranged on and suppress first electrode in downstream aperture plate, ion migratory direction, this first electrode is with inhibition aperture plate mechanical connection and be electrically connected;
For the ioncollection part of collection of ions, this ioncollection part comprises ioncollection part,
Wherein this first electrode forms space therein, and the ioncollection part of described ioncollection part is arranged in the space of inside formation of this first electrode,
The collection device of ion of described ionic migration spectrometer also comprises:
Be arranged on second electrode in downstream described the first electrode, ion migratory direction, this second electrode is configured for making ion in ionic migration spectrometer, to carry out the grounding electrode in the migration electrode of travel motion; And
Be arranged on this first electrode and the second electrode between the first insulating part, this ioncollection part is connected in described the first insulating part,
Described ionic migration spectrometer also comprises:
Be used to the migration electrode of ionic migration spectrometer that the migration electrode supply of power supply is provided, described migration electrode supply has the lead-out terminal of ground connection, and this ground connection lead-out terminal is connected with the second electrode.
13. ionic migration spectrometers according to claim 12, also comprise:
Be arranged on the radome in downstream described the second electrode, ion migratory direction, this radome and described the second electrode gap are opened.
14. ionic migration spectrometers according to claim 12, wherein said suppressor netting gear has flat shape.
15. ionic migration spectrometers according to claim 14, wherein:
Suppress aperture plate and the first electrode in equipotential, and form focusing electric field between ioncollection part.
16. ionic migration spectrometers according to claim 12, wherein said the first electrode has the shape of ring-type.
17. ionic migration spectrometers according to claim 13, wherein said ioncollection part also comprises the segment signal output being connected with this ioncollection part, and
First conductive layer in the heart yearn outside of wherein said radome and coaxial cable is connected, and the heart yearn of this coaxial cable is connected with the segment signal output of this ioncollection part, for from segment signal output output signal.
18. ionic migration spectrometers according to claim 17, also comprise:
Amplifying circuit, the input of this amplifying circuit receives from the signal of described segment signal output output by the heart yearn of described coaxial cable, and described radome is by the first conductive layer of described coaxial cable and being connected in analog of amplifying circuit.
19. ionic migration spectrometers according to claim 18, wherein:
Described the second electrode is connected to amplifying circuit in analog at the output end of described amplifying circuit.
20. ionic migration spectrometers according to claim 18, also comprise:
For shielding the amplifying circuit screening can of amplifying circuit; And
The external conductive casing of ioncollection district part,
Wherein said coaxial cable comprises the second conductive layer that is arranged on the first conductive layer outside, and this second conductive layer connects the external conductive casing of amplifying circuit screening can and ioncollection district part.
21. ionic migration spectrometers according to claim 18, wherein
This ground connection lead-out terminal is connected to described amplifying circuit in analog at the output end of amplifying circuit.
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| CN201110438896.8A CN102522308B (en) | 2009-06-30 | 2009-06-30 | Ion mobility spectrometer and ion collection device thereof |
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| CN110672708A (en) * | 2019-10-28 | 2020-01-10 | 大连工业大学 | Ethylene detection method based on ion mobility spectrometry technology |
| CN113092125B (en) * | 2021-04-06 | 2023-06-20 | 江苏深蓝航天有限公司 | Retarding potential analyzer capable of collecting in multiple directions |
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| US5200614A (en) * | 1992-01-16 | 1993-04-06 | Ion Track Instruments, Inc. | Ion mobility spectrometers |
| US6897437B2 (en) * | 2000-02-29 | 2005-05-24 | Ionwerks | Mobility spectrometer |
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