CN112713078A - Faraday cup receiver suppression pole and suppression method thereof - Google Patents
Faraday cup receiver suppression pole and suppression method thereof Download PDFInfo
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- CN112713078A CN112713078A CN202011612195.7A CN202011612195A CN112713078A CN 112713078 A CN112713078 A CN 112713078A CN 202011612195 A CN202011612195 A CN 202011612195A CN 112713078 A CN112713078 A CN 112713078A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000001629 suppression Effects 0.000 title claims description 22
- 239000000919 ceramic Substances 0.000 claims abstract description 65
- 230000005684 electric field Effects 0.000 claims abstract description 13
- 238000005452 bending Methods 0.000 claims abstract description 12
- 238000010884 ion-beam technique Methods 0.000 claims description 12
- 239000004020 conductor Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 abstract 1
- 239000012634 fragment Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/025—Detectors specially adapted to particle spectrometers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/025—Detectors specially adapted to particle spectrometers
- H01J49/027—Detectors specially adapted to particle spectrometers detecting image current induced by the movement of charged particles
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Abstract
本发明属于同位素质谱仪技术领域，具体涉及一种法拉第杯接收器抑制极及其抑制方法，包括：精密电极、两个定位陶瓷块、导线和陶瓷管，所述精密电极两端固定设置有定位陶瓷块，所述精密电极其中一端的定位陶瓷块上连接有陶瓷管；所述导线的一端与精密电极焊接，导线的另一端从定位陶瓷块和陶瓷管内穿出。本发明采用钣金折弯工艺制造，其加工容易、零件数量少、精度高、定位可靠，能够与杯体形成理想的阻止电场，有效抑制二次电子逃逸。
The invention belongs to the technical field of isotope mass spectrometers, and in particular relates to a Faraday cup receiver suppressor electrode and a suppressing method thereof, comprising: a precision electrode, two positioning ceramic blocks, a wire and a ceramic tube, wherein two ends of the precision electrode are fixedly provided with positioning In the ceramic block, a ceramic tube is connected to the positioning ceramic block at one end of the precision electrode; one end of the wire is welded with the precision electrode, and the other end of the wire passes through the positioning ceramic block and the ceramic tube. The invention adopts the sheet metal bending process, which is easy to process, has a small number of parts, high precision and reliable positioning, can form an ideal blocking electric field with the cup body, and effectively inhibit the escape of secondary electrons.
Description
Technical Field
The invention belongs to the technical field of isotope mass spectrometers, and particularly relates to a Faraday cup receiver suppression pole and a suppression method thereof.
Background
Faraday cup receivers are important sensors in mass spectrometers to convert the ion current moving in vacuum into an electron current in a conductor and thus to enable measurement of the ion current intensity. The multi-receiving isotope mass spectrometer adopts the signal ratio between the receivers as a final measurement result, and the consistency of the receiving efficiency of the Faraday cup is directly related to the measurement precision. The suppression pole is arranged in front of the receiver opening, and the electric field formed between the suppression pole and the receiver opening can prevent secondary electrons from escaping, so that the receiving efficiency of the Faraday cup receiver is improved to be close to 100 percent, and further higher receiving efficiency consistency is obtained, which is the most effective technical means.
However, the total thickness of the faraday cup receiver of the existing multi-receiving isotope mass spectrometer is only about 2.3mm due to space limitation. The suppression pole is used as a component in a Faraday cup receiver, and the processing and assembling difficulty of the suppression pole is high.
Therefore, it is necessary to design a faraday cup receiver suppression electrode and a suppression method thereof, which are easy to process, have a small number of parts, high accuracy and reliable positioning, and can form an ideal electric field with a cup body to effectively suppress the escape of secondary electrons.
Disclosure of Invention
The invention aims to provide a suppression pole of a Faraday cup receiver and a suppression method thereof, which are used for solving the problems of high processing and assembly difficulty and low ion signal accuracy of the conventional Faraday cup receiver suppression pole.
The technical scheme adopted by the invention is as follows:
a faraday cup receiver suppression pole, comprising: the ceramic positioning device comprises a precision electrode, two positioning ceramic blocks, a lead and a ceramic tube, wherein the positioning ceramic blocks are fixedly arranged at two ends of the precision electrode, and the positioning ceramic block at one end of the precision electrode is connected with the ceramic tube; one end of the lead is welded with the precision electrode, and the other end of the lead penetrates out of the positioning ceramic block and the ceramic tube.
The whole accurate electrode is "C" style of calligraphy groove type structure, accurate electrode includes: the device comprises two pole pieces, two positioning plates, a rectangular through hole and two elastic pieces;
the two pole pieces are respectively and symmetrically arranged on two groove-shaped edges of the precision electrode; two ends of the precision electrode are respectively provided with a positioning plate; the middle part of the groove-shaped bottom surface of the precision electrode is provided with a rectangular through hole; elastic pieces are respectively arranged on two short edges of the rectangular through hole; the elastic sheet is formed by symmetrically turning outwards after a rectangular through hole is formed in the middle material of the groove-shaped bottom surface of the precision electrode.
The positioning ceramic block includes: a positioning groove and a positioning through hole; the positioning ceramic block is integrally of a concave structure, a positioning groove is formed in the middle of the surface of the positioning ceramic block, and a positioning through hole is formed in the center of the positioning groove.
The positioning plate is arranged in the positioning through hole of the positioning ceramic block and used for limiting the degree of freedom of the precision electrode in the vertical direction; the size of the positioning plate is matched with that of the positioning through hole.
The pole piece and the shell fragment of accurate electrode all set up in the constant head tank of location ceramic piece for restrict accurate electrode horizontal direction degree of freedom, the shell fragment is used for assisting the location block of pole piece in the constant head tank.
The rectangular through hole is an ion beam channel; the whole lead is of an L-shaped bent structure, a plane is arranged at the end part of one end, welded with the precision electrode, of the lead, and the plane is used for being welded with a positioning plate of the precision electrode and supplying power to the precision electrode; the bending angle of the bending section of the lead is a right angle.
And a through hole is formed in the circle center of the ceramic tube and used for conducting wire insulation penetration.
A method of suppressing a faraday cup receiver suppressor as described above, comprising the steps of:
the method comprises the following steps: arranging a suppression pole of the Faraday cup receiver in front of an opening of the Faraday cup receiver, wherein a rectangular through hole in the middle of a precise electrode is opposite to the opening of the Faraday cup receiver to form a channel for ion beams to enter the Faraday cup receiver; accurately positioning the precision electrode in a positioning hole and a positioning groove of the positioning ceramic block;
step two: the Faraday cup receiver is at the ground potential, the precision electrode is communicated with the negative voltage source through a lead, and an electric field is prevented between the Faraday cup receiver and the precision electrode because the potential of the precision electrode is lower than that of the Faraday cup receiver;
step three: the precise electrodes and the positioning ceramic blocks are accurately positioned to form mirror symmetry ideal stopping electric fields; because the positioning ceramic block and the ceramic tube are insulating pieces, the precise electrode, the lead, the Faraday cup receiver and other conductor parts can be isolated;
step four: when the ion beam flies to pass through the rectangular through hole in the middle of the precision electrode and enters the Faraday cup receiver, secondary electrons generated by the impact of the ion beam and the Faraday cup receiver cannot escape from the detector under the action of an electric field, so that the escape of the secondary electrons is effectively inhibited, and the receiving efficiency of the Faraday cup receiver is improved.
The invention has the beneficial technical effects that:
the suppression pole of the Faraday cup receiver designed by the invention is manufactured by adopting a sheet metal bending process, is easy to process, has small number of parts, high precision and reliable positioning, can form an ideal electric field with a cup body, and effectively suppresses the escape of secondary electrons.
Drawings
FIG. 1 is a schematic view of the Faraday cup receiver suppressor electrode structure designed in accordance with the present invention
FIG. 2 is a schematic diagram of a precision electrode structure according to the present invention;
FIG. 3 is a schematic plan view of a precision electrode according to the present invention;
FIG. 4 is a schematic view of a positioning ceramic block according to the present invention;
FIG. 5 is a schematic view of a conductive line structure according to the present invention
Fig. 6 is a schematic view of the structure of the ceramic tube according to the present invention.
In the figure: 1-precision electrodes; 2-positioning the ceramic block; 3-a wire; 4-ceramic tube, 11-pole piece; 12-a positioning plate; 13-a rectangular through hole; 14-spring plate, 21-positioning through hole; 22-positioning groove, 31-plane; 32-bending section, 41-through hole.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and detailed description,
as shown in fig. 1 to 6, a faraday cup receiver suppressor comprises: the device comprises a precision electrode 1, two positioning ceramic blocks 2, a lead 3 and a ceramic tube 4, wherein the positioning ceramic blocks 2 are fixedly arranged at two ends of the precision electrode 1, and the ceramic tube 4 is connected to the positioning ceramic block 2 at one end of the precision electrode 1; one end of the lead 3 is welded with the precision electrode 1, and the other end of the lead 3 penetrates out of the positioning ceramic block 2 and the ceramic tube 4.
The whole precision electrode 1 is "C" style of calligraphy groove type structure, precision electrode 1 includes: the device comprises two pole pieces 11, two positioning plates 12, a rectangular through hole 13 and two elastic pieces 14;
the two pole pieces 11 are respectively and symmetrically arranged on two groove-shaped edges of the precision electrode 1; two ends of the precision electrode 1 are respectively provided with a positioning plate 12; a rectangular through hole 13 is formed in the middle of the groove-shaped bottom surface of the precision electrode 1; the two short edges of the rectangular through hole 13 are respectively provided with an elastic sheet 14; the elastic sheet 14 is formed by symmetrically turning outwards after a rectangular through hole 13 is formed in the middle material of the groove-shaped bottom surface of the precision electrode 1.
The positioning ceramic block 2 comprises: a positioning groove 22 and a positioning through hole 21; the positioning ceramic block 2 is integrally of a concave structure, the middle of the surface of the positioning ceramic block 2 is provided with a positioning groove 22, and the center of the positioning groove 22 is provided with a positioning through hole 21.
The positioning plate 12 is arranged in the positioning through hole 21 of the positioning ceramic block 2 and used for limiting the degree of freedom of the precision electrode 1 in the vertical direction; the size of the positioning plate 12 is matched with that of the positioning through hole 21.
The pole piece 11 and the shell fragment 14 of accurate electrode 1 all set up in the constant head tank 22 of location ceramic block 2 for limit accurate electrode 1 lateral direction degree of freedom, the shell fragment 14 is used for assisting the location block of pole piece 11 in constant head tank 22.
The rectangular through hole 13 is an ion beam channel; the whole lead 3 is of an L-shaped bent structure, a plane 31 is arranged at one end part of the lead 3 welded with the precision electrode 1, and the plane 31 is used for being welded with the positioning plate 12 of the precision electrode 1 and supplying power to the precision electrode 1; the bending angle of the bending section of the lead 3 is a right angle. The right-angle bent section of the lead 3 is used for limiting the axial movement of the ceramic tube 4, so that the insulation reliability is ensured.
The ceramic tube 4 is provided with a through hole 41 at the center for the wire 3 to pass through in an insulation manner.
The pole piece 11, the positioning plate 12 and the elastic sheet 14 are integrally formed with the precision electrode (1);
a method of suppressing a faraday cup receiver suppressor as described above, comprising the steps of:
the method comprises the following steps: arranging a suppression pole of the Faraday cup receiver in front of an opening of the Faraday cup receiver, wherein a rectangular through hole in the middle of a precise electrode is opposite to the opening of the Faraday cup receiver to form a channel for ion beams to enter the Faraday cup receiver; accurately positioning the precision electrode in a positioning hole and a positioning groove of the positioning ceramic block;
step two: the Faraday cup receiver is at the ground potential, the precision electrode is communicated with the negative voltage source through a lead, and an electric field is prevented between the Faraday cup receiver and the precision electrode because the potential of the precision electrode is lower than that of the Faraday cup receiver;
step three: the precise electrodes and the positioning ceramic blocks are accurately positioned to form mirror symmetry ideal stopping electric fields; because the positioning ceramic block and the ceramic tube are insulating pieces, the precise electrode, the lead, the Faraday cup receiver and other conductor parts can be isolated;
step four: when the ion beam flies to pass through the rectangular through hole in the middle of the precision electrode and enters the Faraday cup receiver, secondary electrons generated by the impact of the ion beam and the Faraday cup receiver cannot escape from the detector under the action of an electric field, so that the escape of the secondary electrons is effectively inhibited, and the receiving efficiency of the Faraday cup receiver is improved.
The precision electrode manufactured by the sheet metal bending process is small in part number and does not need to be assembled and welded;
the bending part of the precision electrode designed by the invention is provided with the etching dent, and the high-precision bending does not need a complex precision die;
the invention utilizes the structure of the opening in the middle of the precision electrode to fold the removed material outwards, ensures the electrode to be attached to the opening of the positioning ceramic block by means of the elasticity of the electrode, and realizes the positioning and clamping in the front and back directions.
Claims (8)
1. A faraday cup receiver suppressor comprising: the device comprises a precision electrode (1), two positioning ceramic blocks (2), a lead (3) and a ceramic tube (4), wherein the positioning ceramic blocks (2) are fixedly arranged at two ends of the precision electrode (1), and the ceramic tube (4) is connected to the positioning ceramic block (2) at one end of the precision electrode (1); one end of the lead (3) is welded with the precision electrode (1), and the other end of the lead (3) penetrates out of the positioning ceramic block (2) and the ceramic tube (4).
2. A faraday cup receiver suppressor according to claim 1, wherein the precision electrode (1) is of generally "C" -shaped channel configuration, the precision electrode (1) comprising: the device comprises two pole pieces (11), two positioning plates (12), a rectangular through hole (13) and two elastic pieces (14);
the two pole pieces (11) are respectively and symmetrically arranged on two groove-shaped edges of the precision electrode (1); two ends of the precision electrode (1) are respectively provided with a positioning plate (12); the middle part of the groove-shaped bottom surface of the precision electrode (1) is provided with a rectangular through hole (13); elastic sheets (14) are respectively arranged on two short sides of the rectangular through hole (13); the elastic sheet (14) is formed by symmetrically turning outwards after a rectangular through hole (13) is formed in the middle material of the groove-shaped bottom surface of the precision electrode (1).
3. A faraday cup receiver suppressor according to claim 2, wherein said positioning ceramic block (2) comprises: a positioning groove (22) and a positioning through hole (21); the positioning ceramic block (2) is integrally of a concave structure, a positioning groove (22) is formed in the middle of the surface of the positioning ceramic block (2), and a positioning through hole (21) is formed in the center of the positioning groove (22).
4. A faraday cup receiver suppression pole according to claim 3, characterized in that said positioning plate (12) is arranged in positioning through holes (21) of positioning ceramic blocks (2) for limiting vertical freedom of precision electrodes (1); the size of the positioning plate (12) is matched with that of the positioning through hole (21).
5. The Faraday cup receiver suppressor pole of claim 4, wherein the pole piece (11) and the spring plate (14) of the precision electrode (1) are both disposed in a positioning groove (22) of the positioning ceramic block (2) for limiting the lateral degree of freedom of the precision electrode (1), and the spring plate (14) is used for assisting the positioning and clamping of the pole piece (11) in the positioning groove (22).
6. A Faraday cup receiver suppressor according to claim 5, wherein the rectangular through hole (13) is an ion beam channel; the whole lead (3) is of an L-shaped bent structure, a plane (31) is arranged at one end part of the lead (3) welded with the precision electrode (1), and the plane (31) is used for being welded with a positioning plate (12) of the precision electrode (1) and supplying power to the precision electrode (1); the bending angle of the bending section of the lead (3) is a right angle.
7. The Faraday cup receiver suppressor electrode according to claim 6, wherein the ceramic tube (4) is provided with a through hole (41) at the center for the wire (3) to pass through in an insulating manner.
8. A method of faraday cup receiver suppressor pole suppression as claimed in any of claims 1 to 7 comprising the steps of:
the method comprises the following steps: arranging a suppression pole of the Faraday cup receiver in front of an opening of the Faraday cup receiver, wherein a rectangular through hole in the middle of a precise electrode is opposite to the opening of the Faraday cup receiver to form a channel for ion beams to enter the Faraday cup receiver; accurately positioning the precision electrode in a positioning hole and a positioning groove of the positioning ceramic block;
step two: the Faraday cup receiver is at the ground potential, the precision electrode is communicated with the negative voltage source through a lead, and an electric field is prevented between the Faraday cup receiver and the precision electrode because the potential of the precision electrode is lower than that of the Faraday cup receiver;
step three: the precise electrodes and the positioning ceramic blocks are accurately positioned to form mirror symmetry ideal stopping electric fields; because the positioning ceramic block and the ceramic tube are insulating pieces, the precise electrode, the lead, the Faraday cup receiver and other conductor parts can be isolated;
step four: when the ion beam flies to pass through the rectangular through hole in the middle of the precision electrode and enters the Faraday cup receiver, secondary electrons generated by the impact of the ion beam and the Faraday cup receiver cannot escape from the detector under the action of an electric field, so that the escape of the secondary electrons is effectively inhibited, and the receiving efficiency of the Faraday cup receiver is improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011612195.7A CN112713078A (en) | 2020-12-30 | 2020-12-30 | Faraday cup receiver suppression pole and suppression method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011612195.7A CN112713078A (en) | 2020-12-30 | 2020-12-30 | Faraday cup receiver suppression pole and suppression method thereof |
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| Publication Number | Publication Date |
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| CN112713078A true CN112713078A (en) | 2021-04-27 |
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| CN202011612195.7A Pending CN112713078A (en) | 2020-12-30 | 2020-12-30 | Faraday cup receiver suppression pole and suppression method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09293480A (en) * | 1996-04-25 | 1997-11-11 | Nissin Electric Co Ltd | Ion irradiation device |
| CN102426173A (en) * | 2011-10-20 | 2012-04-25 | 中国航天科技集团公司第五研究院第五一〇研究所 | Device and method for testing weak electron beam |
| CN106469638A (en) * | 2015-08-14 | 2017-03-01 | 塞莫费雪科学（不来梅）有限公司 | Detector in isotope ratio mass spectrometer and slit configuration |
| CN213988813U (en) * | 2020-12-30 | 2021-08-17 | 核工业北京地质研究院 | Faraday cup receiver suppression pole |
-
2020
- 2020-12-30 CN CN202011612195.7A patent/CN112713078A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09293480A (en) * | 1996-04-25 | 1997-11-11 | Nissin Electric Co Ltd | Ion irradiation device |
| CN102426173A (en) * | 2011-10-20 | 2012-04-25 | 中国航天科技集团公司第五研究院第五一〇研究所 | Device and method for testing weak electron beam |
| CN106469638A (en) * | 2015-08-14 | 2017-03-01 | 塞莫费雪科学（不来梅）有限公司 | Detector in isotope ratio mass spectrometer and slit configuration |
| CN213988813U (en) * | 2020-12-30 | 2021-08-17 | 核工业北京地质研究院 | Faraday cup receiver suppression pole |
Non-Patent Citations (1)
| Title |
|---|
| 刘文贵等: "同位素质谱仪的法拉第接收器", 分析仪器, 30 April 2013 (2013-04-30), pages 57 - 62 * |
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