CN111954359A - Gas stripping device for stripping neutral particles into charged particles - Google Patents
Gas stripping device for stripping neutral particles into charged particles Download PDFInfo
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- CN111954359A CN111954359A CN202010835707.XA CN202010835707A CN111954359A CN 111954359 A CN111954359 A CN 111954359A CN 202010835707 A CN202010835707 A CN 202010835707A CN 111954359 A CN111954359 A CN 111954359A
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- stripping
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/0006—Investigating plasma, e.g. measuring the degree of ionisation or the electron temperature
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/0006—Investigating plasma, e.g. measuring the degree of ionisation or the electron temperature
- H05H1/0081—Investigating plasma, e.g. measuring the degree of ionisation or the electron temperature by electric means
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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Particle Accelerators (AREA)
Abstract
The invention discloses a gas stripping device for stripping neutral particles into charged particles, which comprises a vacuum chamber, wherein a particle beam inlet flange and a particle beam outlet flange are respectively arranged at two ends of the vacuum chamber, an air inlet flange communicated with the vacuum chamber is arranged at the top of the vacuum chamber, a stripping chamber is arranged in the vacuum chamber, two ends of the stripping chamber are respectively connected with a differential pipeline in a sealing manner, and the top of the stripping chamber is connected to the air inlet flange through a pipeline. The invention effectively reduces the influence of the stripping medium on the energy of the neutral particles, and simultaneously the differential pipeline can effectively ensure the linearity of the particle beam and is more beneficial to the stripping of the particle beam. By selecting a suitable stripping gas (hydrogen), impurity contamination of the tokamak device is avoided.
Description
Technical Field
The invention relates to the technical field of particle stripping, in particular to a gas stripping device for stripping neutral particles into charged particles.
Background
In a tokomak apparatus, the ion energy and ion species of a high temperature plasma cannot be measured directly, but are obtained indirectly by measuring neutral particles that escape from the plasma. In the process of measuring the energy and the type of neutral particles, the neutral particles are usually ionized to become charged particles, and then the measurement is performed by an electromagnetic analysis unit, which needs a stripping unit to complete the process.
In the magnetic confinement nuclear fusion reaction, the fuel species are hydrogen and isotopes of hydrogen, and are limited by the temperature of the plasma within the tokamak apparatus, with the energy of neutral particles escaping from the plasma ranging from a few keV to a few hundred keV. Therefore, the stripping of the neutral particles is required to minimize the influence of the stripping medium on the energy of the incident neutral particles and to prevent the introduction of other impurities.
Disclosure of Invention
The invention aims to provide a gas stripping device for stripping neutral particles into charged particles, which is used for reducing the influence of a stripping medium on the energy of the neutral particles and avoiding impurity pollution to a Tokamak device.
In order to solve the technical problem, the invention adopts the following scheme:
a gas stripping device for stripping neutral particles into charged particles comprises a vacuum chamber, wherein a particle beam inlet flange and a particle beam outlet flange are respectively arranged at two ends of the vacuum chamber, an air inlet flange communicated with the vacuum chamber is arranged at the top of the vacuum chamber, a stripping chamber is arranged in the vacuum chamber, differential pipelines are respectively connected at two ends of the stripping chamber in a sealing mode, and the top of the stripping chamber is connected to the air inlet flange through a pipeline.
Preferably, the middle part of the differential pipeline is connected with a gas barrier, the gas barrier is in matching connection with the inner cavity of the stripping chamber, the stripping chamber is in a cylindrical shape with two open ends, the cylindrical stripping chamber is easily connected and sealed with the gas barrier, the gas tightness of the stripping chamber is effectively ensured through the gas barrier, the internal gas pressure is ensured within a stable preset range, and half of the differential pipeline is positioned in the stripping chamber, so that the linearity of the particle beam is better.
Preferably, the inner diameter of the differential pipeline is 1mm-4mm, the stripping gas is kept at a high gas pressure in the stripping chamber by using the small conductance of the slender differential pipeline, the length of the differential pipeline can be adjusted as required, the linearity of the particle beam can be ensured, and the stripping of the neutral particle beam is facilitated.
Preferably, the particle beam inlet flange and the particle beam outlet flange are provided with a pore channel at the center, and the inner diameter of the pore channel is 1mm-6 mm. The neutral particle beam passes through the small hole channel, so that the pressure difference between two ends is realized, and the beam spot size of the particle beam is limited.
Preferably, the inner side of the air inlet flange is connected with a corrugated pipe through a VCR joint, the outlet end of the corrugated pipe is integrally communicated with the stripping chamber, the VCR joint is the prior known technology, the cleanliness is high (the components are subjected to processes such as electro-polishing and cleaning), the sealing performance is good, the corrugated pipe is particularly suitable for an ultrahigh pure system, an ultrahigh vacuum system and a high-pressure system which require no leakage, and the corrugated pipe is integrally communicated with the stripping chamber, so that the condition of hydrogen leakage can be effectively avoided, the influence on the vacuum degree in the vacuum chamber is avoided, and the stripping effect of neutral particle beams is further influenced.
Preferably, a needle valve is arranged at an inlet of the air inlet flange, and the air inlet flange is communicated with an external hydrogen supply device. The controllable regulation of air pressure at the inlet flange entrance is realized by matching the control of the needle valve on the gas circuit, the effective control of the air pressure in the stripping chamber is realized by regulating the air pressure at the inlet flange entrance, and the impurity pollution brought to the Tokamak device is avoided by selecting proper stripping gas (hydrogen).
Preferably, a support located in the vacuum chamber is fixed on the particle beam inlet flange, one end, away from the particle beam inlet flange, of the support is sleeved with the stripping chamber, the support is of a cylindrical structure, and the four sides of the support are all hollow. The bracket enables the differential pipeline at the center of the stripping chamber to be aligned with the pore channel at the center of the particle beam inlet flange, ensures that neutral particle beams can smoothly enter the stripping chamber, does not influence subsequent analysis, has a simple structure, and does not influence the vacuum degree on neutral particle beam lines.
Preferably, the bottom of the vacuum chamber is connected with a vacuum pump. The vacuum pump can timely exhaust gas in the vacuum chamber and maintain high vacuum degree in the vacuum chamber.
The invention has the following beneficial effects:
1. a stripping chamber is arranged in a vacuum chamber, and differential pipelines with smaller inner diameters are added at two ends of the stripping chamber to form a windowless gas stripping unit design, so that a certain pressure difference is kept inside and outside the stripping chamber, the influence of a stripping medium on the energy of neutral particles is effectively reduced, and meanwhile, the differential pipelines can effectively ensure the linear motion of particle beams and are more beneficial to the stripping of the particle beams. By selecting a suitable stripping gas (hydrogen), impurity contamination of the tokamak device is avoided.
2. The needle valve is installed on the air inlet path of the air inlet flange and used for controlling air pressure, controllable adjustment of the air pressure at the inlet of the air inlet flange is achieved, and effective control of the air pressure in the stripping chamber is achieved by adjusting the air pressure at the inlet of the air inlet flange.
3. The neutral particle beams pass through small pore channels in the centers of the particle beam inlet flange and the particle beam outlet flange, so that the pressure difference between the two ends is realized, and the beam spot size of the particle beam is limited.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a structural schematic diagram of the stent.
Reference numerals: 1-vacuum chamber, 2-stripping chamber, 3-particle beam inlet flange, 4-particle beam outlet flange, 5-gas inlet flange, 6-vacuum pump, 7-differential pipeline, 8-corrugated pipe, 9-VCR joint, 10-pore channel, 11-support, 12-tokamak device, 13-electromagnetic analysis device and 14-gas barrier.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", and the like indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, or that are conventionally placed when the product of the present invention is used, and are used only for convenience in describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "open," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 1, a gas stripping device for stripping neutral particles into charged particles comprises a vacuum chamber 1, a particle beam inlet flange 3 and a particle beam outlet flange 4 are respectively arranged at two ends of the vacuum chamber 1, the particle beam inlet flange 3 is connected with a tokamak device 12, the particle beam outlet flange 4 is flange-connected with an external electromagnetic analysis device 13, the device is a prior known technology, the working principle and the structure of the device are available for technicians in the field without effort, the device is used for providing incident neutral particle beams, an air inlet flange 5 communicated with the vacuum chamber 1 is arranged at the top of the vacuum chamber 1, the air inlet flange 5 is used for external stripping gas medium to enter, a vacuum pump 6 with large pumping speed is connected at the bottom of the vacuum chamber 1, the vacuum pump 6 can timely remove gas in the vacuum chamber 1 and maintain high vacuum degree in the vacuum chamber 1, the vacuum chamber 1 is provided with a stripping chamber 2, the top of the stripping chamber 2 is connected to the gas inlet flange 5 through a pipeline, so that a stripping gas medium directly enters the stripping chamber 2, two ends of the stripping chamber 2 are respectively and hermetically connected with a slender differential pipeline 7, the small conductance of the slender differential pipeline 7 enables the stripping gas medium to keep higher gas pressure in the stripping chamber 2, the length of the differential pipeline 7 can be adjusted as required, the stripping chamber 2 forms a windowless gas stripping unit design, a certain pressure difference is kept inside and outside the stripping chamber 2, the influence of the stripping medium on the energy of neutral particles is effectively reduced, meanwhile, the linearity of particle beams can be guaranteed, and the stripping of the neutral particle beams is facilitated.
Example 2
As shown in fig. 1, on the basis of the above embodiment, the gas barrier 14 is connected to the middle of the differential duct 7 by welding, the gas barrier 14 is in matching connection with the inner cavity of the stripping chamber 2, the gas barrier 14, the differential duct 7, and the stripping chamber 2 are all made of steel, the stripping chamber 2 is in a cylindrical shape with two open ends, the cylindrical stripping chamber 2 is easily connected and sealed with the gas barrier 14, the gas barrier 14 effectively ensures the airtightness of the stripping chamber 2, ensures the internal gas pressure within a stable preset range, and half of the differential duct 7 is located in the stripping chamber 2, so that the linearity of the particle beam coming out is better.
Example 3
As shown in fig. 1, on the basis of the above embodiment, the inner diameter of the differential duct 7 is 1mm-4mm, in this embodiment, a differential duct 7 with an inner diameter of 4mm is adopted, the stripping gas is kept at a high gas pressure in the stripping chamber 2 by using a small flow guide of the slender differential duct 7, the length of the differential duct 7 can be adjusted as required, the linearity of the particle beam can be ensured, and the stripping of the neutral particle beam is facilitated, and the inner diameter of the differential duct 7 is selected according to the pressure difference required inside and outside the stripping chamber 2.
Example 4
As shown in fig. 1, on the basis of the above embodiment, a hole 10 is provided at the center of the particle beam inlet flange 3 and the particle beam outlet flange 4, the inner diameter of the hole 10 is 1mm to 6mm, the inner diameter of the hole 10 in this embodiment is 6mm, and needs to be larger than the inner diameter of the differential duct 7, so as to allow the neutral particle beam to pass through the small hole, realize the pressure difference between the two ends, and limit the beam spot size of the particle beam.
Example 5
As shown in fig. 1, on the basis of the above embodiment, the inside of the air inlet flange 5 is connected with the bellows 8 through the VCR joint 9, the outlet end of the bellows 8 is integrally communicated with the stripping chamber 2, the VCR joint 9 is a known technique, has high cleanliness (the components are subjected to processes such as electropolishing and cleaning), and good sealing performance, and is particularly suitable for an ultra-high purity system, an ultra-high vacuum system, and a high pressure system which require no leakage, and the bellows 8 is integrally communicated with the stripping chamber 2, so that the occurrence of hydrogen leakage can be effectively avoided, and the influence on the vacuum degree in the vacuum chamber 1 is avoided, thereby influencing the stripping effect of the neutral particle beams.
Example 6
As shown in fig. 1, in the above embodiment, a needle valve is provided at the pipe inlet of the inlet flange 5, which is not shown in the figure, and the inlet flange 5 is communicated with an external hydrogen supply device. The controllable regulation of 5 entrances atmospheric pressure of flange that admits air is realized to the control of needle valve on the cooperation gas circuit, through the atmospheric pressure of 5 entrances of regulation flange that admits air, realizes the effective control to peeling off 2 interior atmospheric pressure of room, through selecting suitable peeling off gaseous (hydrogen), has avoided bringing impurity pollution to tokamak device 12.
Example 7
As shown in fig. 1 and 2, in the above embodiment, a support 11 located in the vacuum chamber 1 is fixed on the particle beam inlet flange 3, one end of the support 11 away from the particle beam inlet flange 4 is sleeved with the stripping chamber 2, the support 11 is of a cylindrical structure, and all four sides are hollow. The bracket 11 enables the differential pipeline 7 at the center of the stripping chamber 2 to be aligned with the pore channel 10 at the center of the particle beam inlet flange 3, so that neutral particle beams can smoothly enter the stripping chamber 2 without influencing subsequent analysis, and the bracket 11 has a simple structure and does not influence the vacuum degree on neutral particle beam lines.
The use principle of the scheme is as follows: in practical application, a particle beam inlet flange and an outlet flange are respectively connected with a gram device 12 and an electromagnetic analysis device 13 by flanges, a neutral particle beam is emitted from the tokamak device 12 and enters a vacuum chamber 1 through a small pore channel at the center of a particle beam inlet flange 3, the vacuum chamber 1 is in a high vacuum state under the action of a vacuum pump 6, meanwhile, a stripping gas medium (hydrogen) enters a corrugated pipe 8 from an air inlet flange 5 and then enters a stripping chamber 2 through the corrugated pipe 8, so that a larger pressure difference is formed between the stripping chamber 2 and the vacuum chamber 1, the influence of the stripping medium on the energy of the neutral particle is effectively reduced, the impurity pollution to the tokamak device 12 is avoided by selecting the hydrogen as the stripping medium, the particle beam enters the stripping chamber 2 through a slender differential pipeline 7, and the small flow of the slender differential pipeline 7 ensures that the stripping gas medium keeps higher air pressure in the stripping chamber 2, meanwhile, the method can also ensure the linearity of the particle beam, is more beneficial to the stripping of the neutral particle beam, can be applied to various Tokamak neutral particle analysis devices, and realizes the effective stripping of the low-energy neutral particles without influencing the energy of the neutral particles; the device has the characteristics of simple structure and low construction and post-treatment cost, and can be practically applied in related fields.
The foregoing is only a preferred embodiment of the present invention, and the present invention is not limited thereto in any way, and any simple modification, equivalent replacement and improvement made to the above embodiment within the spirit and principle of the present invention still fall within the protection scope of the present invention.
Claims (8)
1. The gas stripping device for stripping neutral particles into charged particles comprises a vacuum chamber (1), wherein a particle beam inlet flange (3) and a particle beam outlet flange (4) are respectively arranged at two ends of the vacuum chamber (1), and an air inlet flange (5) communicated with the vacuum chamber (1) is arranged at the top of the vacuum chamber (1), and is characterized in that the vacuum chamber (1) is provided with a stripping chamber (2), two ends of the stripping chamber (2) are respectively hermetically connected with a differential pipeline (7), and the top of the stripping chamber (2) is connected onto the air inlet flange (5) through a pipeline.
2. The gas stripping device for stripping neutral particles into charged particles as claimed in claim 1, characterized in that a gas barrier (14) is connected to the middle of the differential duct (7), the gas barrier (14) is connected to the inner cavity of the stripping chamber (2) in a matching manner, and the stripping chamber (2) is in a cylindrical shape with two open ends.
3. A gas stripping arrangement for stripping neutral particles into charged particles as claimed in claim 1, characterized in that the differential conduit (7) has an inner diameter of 1mm to 4 mm.
4. The gas stripping device for stripping neutral particles into charged particles as claimed in claim 1, characterized in that a duct (10) is provided centrally on the particle beam inlet flange (3) and the particle beam outlet flange (4), the inner diameter of the duct (10) being 1mm-6 mm.
5. A gas stripping apparatus for stripping neutral particles into charged particles as claimed in claim 1, characterized in that a bellows (8) is connected to the inside of the gas inlet flange (5) via a VCR joint (9), the outlet end of the bellows (8) communicating integrally with the stripping chamber (2).
6. A gas stripping apparatus for stripping neutral particles into charged particles as claimed in claim 1, characterized in that a needle valve is provided at the inlet of the gas inlet flange (5), the gas inlet flange (5) communicating with an external hydrogen supply.
7. The gas stripping device for stripping neutral particles into charged particles according to claim 1, wherein a support (11) located in the vacuum chamber (1) is fixed on the particle beam inlet flange (3), one end of the support (11) far away from the particle beam inlet flange (3) is sleeved with the stripping chamber (2), the support (11) is of a cylindrical structure, and four sides of the support are hollow.
8. A gas stripping arrangement for stripping neutral particles into charged particles as claimed in claim 1, characterized in that a vacuum pump (6) is connected to the bottom of the vacuum chamber (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010835707.XA CN111954359A (en) | 2020-08-19 | 2020-08-19 | Gas stripping device for stripping neutral particles into charged particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010835707.XA CN111954359A (en) | 2020-08-19 | 2020-08-19 | Gas stripping device for stripping neutral particles into charged particles |
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| Publication Number | Publication Date |
|---|---|
| CN111954359A true CN111954359A (en) | 2020-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010835707.XA Pending CN111954359A (en) | 2020-08-19 | 2020-08-19 | Gas stripping device for stripping neutral particles into charged particles |
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| CN (1) | CN111954359A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483531A (en) * | 2021-12-31 | 2022-05-13 | 山东微波电真空技术有限公司 | Horizontal exhaust method and horizontal exhaust platform |
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| JPS57119443A (en) * | 1981-01-19 | 1982-07-24 | Toshiba Corp | Charge exchange type neutral particle analyzer |
| US4473748A (en) * | 1981-03-18 | 1984-09-25 | Tokyo Shibaura Denki Kabushiki Kaisha | Neutral particle analyzer |
| JPH10223399A (en) * | 1997-02-04 | 1998-08-21 | Nissin High Voltage Co Ltd | Variable conductance charging converter |
| US20130112869A1 (en) * | 2010-04-12 | 2013-05-09 | Eth Zurich, Eth Transfer | Mass spectrometry system with molecular dissociation and associated method |
| CN106710661A (en) * | 2016-12-27 | 2017-05-24 | 中国科学院合肥物质科学研究院 | High-pressure-difference gas target device suitable for superhigh-intensity deuterium tritium fusion neutron source |
| CN111157605A (en) * | 2020-01-02 | 2020-05-15 | 中国原子能科学研究院 | Accelerator mass spectrometer for isotope measurement |
| CN111366970A (en) * | 2018-12-25 | 2020-07-03 | 核工业西南物理研究院 | Neutral particle analysis system with mass and energy resolution capability |
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2020
- 2020-08-19 CN CN202010835707.XA patent/CN111954359A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57119443A (en) * | 1981-01-19 | 1982-07-24 | Toshiba Corp | Charge exchange type neutral particle analyzer |
| US4473748A (en) * | 1981-03-18 | 1984-09-25 | Tokyo Shibaura Denki Kabushiki Kaisha | Neutral particle analyzer |
| JPH10223399A (en) * | 1997-02-04 | 1998-08-21 | Nissin High Voltage Co Ltd | Variable conductance charging converter |
| US20130112869A1 (en) * | 2010-04-12 | 2013-05-09 | Eth Zurich, Eth Transfer | Mass spectrometry system with molecular dissociation and associated method |
| CN106710661A (en) * | 2016-12-27 | 2017-05-24 | 中国科学院合肥物质科学研究院 | High-pressure-difference gas target device suitable for superhigh-intensity deuterium tritium fusion neutron source |
| CN111366970A (en) * | 2018-12-25 | 2020-07-03 | 核工业西南物理研究院 | Neutral particle analysis system with mass and energy resolution capability |
| CN111157605A (en) * | 2020-01-02 | 2020-05-15 | 中国原子能科学研究院 | Accelerator mass spectrometer for isotope measurement |
Non-Patent Citations (2)
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| 周月等: "一种测量重核素的小型高压型加速器控制系统的研制", 《原子核物理评论》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483531A (en) * | 2021-12-31 | 2022-05-13 | 山东微波电真空技术有限公司 | Horizontal exhaust method and horizontal exhaust platform |
| CN114483531B (en) * | 2021-12-31 | 2024-03-26 | 山东微波电真空技术有限公司 | Horizontal exhaust method and horizontal exhaust table |
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Application publication date: 20201117 |
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