CN211227314U - Penning ion source - Google Patents
Penning ion source Download PDFInfo
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- CN211227314U CN211227314U CN201921701555.3U CN201921701555U CN211227314U CN 211227314 U CN211227314 U CN 211227314U CN 201921701555 U CN201921701555 U CN 201921701555U CN 211227314 U CN211227314 U CN 211227314U
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Abstract
The utility model belongs to the technical field of ion source devices, and discloses a penning ion source, which comprises a plasma cavity, wherein the plasma cavity comprises a first shell, a second shell and a third shell which are coaxially arranged and are sequentially connected; a cathode element is arranged at the top end of the first shell, an anode element is arranged in the second shell, a magnetic field mechanism is arranged outside the second shell, and a anticathode element is arranged in the third shell; the penning ion source further comprises a cooling cavity, the cooling cavity is arranged at the top of the first shell, and a cooling liquid in the cooling cavity is in contact with the top end of the first shell and covers the cathode element. The utility model discloses a penning ion source is provided with the cooling cavity, can make the seal degree increase of plasma cavity after the injected liquid, reaches sealed effect when cooling the plasma cavity.
Description
Technical Field
The utility model relates to an ion source device technical field especially relates to a penning ion source.
Background
Penning ion source is a commonly used ion source, and generally comprises a first cathode, a second cathode (or a counter cathode, opposite to the cathode), an anode, a plasma chamber, a magnetic field, and the like, wherein the two cathodes are opposite to each other between a cylindrical anode. The penning ion source can be divided into a hot cathode penning source and a cold cathode penning source according to the difference of cold and hot of the cathode. The common cold cathode is iron, titanium, tin, etc., and the common hot cathode is tungsten filament, electron bombardment indirect hot cathode, arc discharge heating spontaneous cathode, etc.
The discharge principle is that under the action of an electric field between a cathode and an anode, electrons emitted by the cathode do reciprocating motion between the cathode and an anticathode, and are constrained by an axial magnetic field and do spiral motion along an axis, so that the free path of free electrons is greatly increased, and the probability of ionizing collision with gas molecules is increased. Free electrons are emitted from the cathode and accelerated in the process of being emitted to the anode, and then the electrons are reflected and accelerated in the process of being emitted from the anode to the anticathode. Due to the addition of the axial magnetic field, the Lorentz magnetic force provides centripetal force, electrons are constrained to do spiral motion near the axis of the discharge chamber and react in the plasma cavity, and therefore the cavity generates required protons.
In the BNCT accelerator design process, the ion source is designed to generate the required protons, the proton beam is accelerated by the accelerating part, the target is hit to generate fast neutrons, and the fast neutrons pass through the moderator to generate the required slow neutrons.
However, the existing penning ion source has the following disadvantages: the closed system at the cathode element mounted on the housing of the penning ion source is not good, and the plasma reaction, the gas pressure and the gas purity in the cavity are affected.
Based on the above situation, there is a need to design a penning ion source which can solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a penning ion source that can solve the poor problem of plasma cavity leakproofness.
To achieve the purpose, the utility model adopts the following technical proposal:
a penning ion source comprises a plasma cavity, wherein the plasma cavity comprises a first shell, a second shell and a third shell which are coaxially arranged and sequentially connected;
a cathode element is arranged at the top end of the first shell, an anode element is arranged in the second shell, a magnetic field mechanism is arranged outside the second shell, and a anticathode element is arranged in the third shell;
the penning ion source further comprises a cooling cavity, the cooling cavity is arranged at the top of the first shell, and a cooling liquid in the cooling cavity is in contact with the top end of the first shell and covers the cathode element.
Furthermore, a cathode mounting part is arranged at the top end of the first shell, and the cathode element is mounted in the cathode mounting part;
the cooling cavity comprises a first sealing end cover, the first sealing end cover is sealed on the cathode installation part, a raised guide pipe is arranged on the first sealing end cover, and cooling liquid in the cooling cavity enters the guide pipe and then covers the cathode element.
Furthermore, the cooling cavity further comprises a second sealing end cover, the second sealing end cover covers the first sealing end cover, and a gap communicated with the flow guide pipe is formed between the second sealing end cover and the first sealing end cover.
Furthermore, a driving mechanism is arranged between the magnetic field mechanism and the second shell, and the driving mechanism drives the magnetic field mechanism to axially move along the second shell.
Furthermore, actuating mechanism is including supporting insulating part, rhombus telescopic bracket, magnetic field mechanism fixed mounting support insulating part is last, support insulating part with second casing sliding connection, rhombus telescopic bracket's both ends respectively with support insulating part the second casing is to linking.
Further, an insulating member is disposed between the anode element and the second case.
Furthermore, the third shell comprises a base flange and a anticathode element, the base flange is fixedly connected with the second shell, and the anticathode element is arranged in the base flange.
Furthermore, the cooling cavity is provided with a liquid inlet and a liquid outlet which are oppositely arranged.
Further, a sealing flange is arranged at the end part of the cooling cavity.
The utility model has the advantages that: the penning ion source is provided with the cooling cavity, the sealing degree of the plasma cavity can be increased after liquid is injected, and the sealing effect is achieved while the plasma cavity is cooled.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic structural diagram of an embodiment of the present invention;
wherein, the first shell 1, the cathode element 11, the cathode post 111, the cathode mounting part 12;
the second case 2, the anode element 21, the anode post 211, the insulator 22;
the magnetic field mechanism 4, the driving mechanism 41, the supporting insulating part 411 and the diamond telescopic bracket 412;
the cooling cavity body 5, the first sealing end cover 51, the guide pipe 511, the chamber 512, the second sealing end cover 52, the gap 521, the liquid inlet 53, the liquid outlet 54 and the sealing flange 55.
Detailed Description
In order to further understand and appreciate the structural features and advantages of the present invention, preferred embodiments and the accompanying drawings are described in detail as follows:
as shown in fig. 1, a penning ion source comprises a plasma cavity, and as an improvement of the present invention, the plasma cavity comprises a first shell 1, a second shell 2 and a third shell 3 which are coaxially arranged and sequentially connected; a cathode element 11 is arranged at the top end of the first shell 1, an anode element 21 is arranged in the second shell 2, a magnetic field mechanism 4 is arranged outside the second shell 2, and a counter cathode element 31 is arranged in the third shell 3; the penning ion source further comprises a cooling cavity 5, the cooling cavity 5 is arranged at the top of the first shell 1, and a cooling liquid in the cooling cavity 5 is in contact with the top end of the first shell 1 and covers the cathode element 11.
In this embodiment, the penning ion source is a structure arranged in a vertical direction, and is a cooling cavity 5, a first housing 1, a second housing 2, and a third housing 3 from top to bottom in sequence, where the first housing 1, the second housing 2, the third housing 3, the magnetic field mechanism 4, and the cooling cavity 5 are all cylindrical, the cooling cavity 5 is connected with the first housing 1, the first housing 1 is connected with the second housing 2, and the second housing 2 is connected with the third housing 3 in a fixed and sealed manner, in this embodiment, the cooling cavity 5 is connected with the first housing 1, the first housing 1 is connected with the second housing 2 in a welded manner, and the second housing 2 is fixedly connected with the third housing 3 in a bolt manner. The magnetic field mechanism 4 is sleeved outside the second shell 2. The cooling liquid in the cooling cavity 5 is in contact with the top end of the first shell 1, and heat is dissipated to the plasma cavity in the flowing process of the cooling liquid; the cathode element 11 is covered by the cooling liquid, namely the cathode element and the installation position of the cathode element are not in direct contact with the outside air, and the outside air influences the plasma reaction, the air pressure and the gas purity inside the plasma cavity because the installation position of the conventional cathode element is often insufficient in sealing performance, so that the liquid sealing mode is adopted, the contact between the outside air and the cathode element 11 and the installation position of the cathode element can be greatly reduced, and the sealing performance of the plasma cavity is improved.
In this embodiment, the top end of the first casing 1 is provided with a cathode mounting portion 12, and the cathode element 11 is mounted in the cathode mounting portion 12; the cooling cavity 5 comprises a first sealing end cover 51, the first sealing end cover 51 is sealed on the cathode mounting part 12, a raised guide pipe 511 is arranged on the first sealing end cover 51, and cooling liquid in the cooling cavity 5 enters from the guide pipe 511 and then covers the cathode element 11. The first sealing end cap 51, the cathode mounting part 12 and the cathode element 11 form a chamber 512, the opening position of the top end of the flow guide pipe 511 is higher than that of the cathode element 11, the opening position of the bottom end of the flow guide pipe 511 is communicated with the chamber 512, when the liquid level of the cooling liquid in the cooling cavity 5 exceeds the opening position of the top end of the flow guide pipe 511, the cooling liquid enters the chamber 512, and a liquid seal is formed between the cathode element 11 and the cathode mounting part 12. Cathode element 11 is connected to a power source (not shown) via cathode post 111.
In this embodiment, the cooling cavity 5 further includes a second end cap 52, the second end cap 52 covers the first end cap 51, and a gap 521 communicated with the flow guide pipe 511 is formed between the second end cap 52 and the first end cap 51. When the cooling liquid in the cooling cavity 5 increases, the cooling liquid overflows into the flow guide pipe 511 from the gap 521 and enters into the chamber 512. With the above structure, the air in the cooling chamber 5 can be further prevented from entering the chamber 512 through the flow guide pipe 511.
In this embodiment, a driving mechanism 41 is disposed between the magnetic field mechanism 4 and the second housing 2, and the driving mechanism 41 drives the magnetic field mechanism 4 to move along the axial direction of the second housing 2. The drive mechanism 41 is provided to change the position of the magnetic field mechanism 4 and thus the position of the magnetic field lines as required. The magnetic field mechanism 4 of the present embodiment is composed of a variable excitation system, and the magnitude thereof can be adjusted according to a desired magnetic field. Since the magnitude and position of the magnetic field can be adjusted in this embodiment, different cathode designs can be used, that is, the cathode element 11 can be either a hot cathode or a cold cathode.
In this embodiment, the driving mechanism 41 includes a supporting insulating member 411 and a diamond-shaped telescopic bracket 412, the magnetic field mechanism 4 is fixedly mounted on the supporting insulating member 411, the supporting insulating member 411 is slidably connected to the second housing 2, and two ends of the diamond-shaped telescopic bracket 412 are respectively abutted to the supporting insulating member 411 and the second housing 2. The cross-section that supports insulating part 411 is L shape, the lateral wall cross-section of second casing 2 also is L shape, rhombus telescopic bracket 412 presss from both sides and is supporting insulating part 411, between second casing 2, rhombus telescopic bracket 411 includes many articulated connecting rods each other, be provided with the gyro wheel at the connecting rod tip, it fixes on supporting insulating part 411 to be close to inboard last gyro wheel, it fixes on second casing 2 to be close to inboard lower gyro wheel, when inwards squeezing rhombus telescopic bracket 412, it upwards slides to support insulating part 411, realize the rising of magnetic field mechanism 4 position. The diamond-shaped telescopic bracket 411 further comprises a locking mechanism (not shown), when the magnetic field mechanism 4 is adjusted to a required position, the diamond-shaped telescopic bracket 411 can be fixed through the locking mechanism, and the diamond-shaped telescopic bracket 411 can be continuously adjusted only by releasing the locking mechanism. The specific structure of the locking mechanism can adopt conventional technical means, and is not described in detail herein.
In the present embodiment, an insulating member 22 is disposed between the anode element 21 and the second casing 2. The insulator 22 in this embodiment is an insulating ceramic. The anode element 21 is connected to a power source (not shown) through an anode post 211.
In this embodiment, the third housing 3 includes a base flange 32 and a cathode counter element 31, the base flange 32 is fixedly connected to the second housing 2, and the cathode counter element 31 is disposed in the base flange 32. In this embodiment, the base flange 32 is fixed to the lower portion of the second housing 2 by bolts. The middle part of the base flange 32 is provided with a mounting hole for mounting the anticathode element 31, and the anticathode element 31 is provided with a tapered leading-out port which can collect released beam current.
In this embodiment, the cooling chamber 5 is provided with a liquid inlet 53 and a liquid outlet 54 opposite to each other. In this embodiment, the liquid inlet 53 is positioned higher than the liquid outlet 54. The liquid inlet 53 and the liquid outlet 54 are disposed opposite to each other, which means that the projections of the liquid inlet 53 and the liquid outlet 54 on the cross section of the cooling cavity 5 are located at two ends of the same diameter. By means of the structure, the cooling liquid can flow through the whole upper end face of the first shell 1, and the heat dissipation effect is improved.
In this embodiment, a sealing flange 55 is provided at the end of the cooling chamber 5. In this embodiment, the sealing flange 55 is disposed on the top end of the cooling cavity 5, and is detachably connected to the cooling cavity 5 by bolts. Replacement of cathode element 11 can be performed by opening sealing flange 55.
The parts not related to in the utility model are all the same with the prior art or can be realized by adopting the prior art.
Finally, it should be noted that: in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "vertical", "horizontal", etc. indicate that the directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and understanding of the technical solutions of the present invention, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (9)
1. A penning ion source comprises a plasma cavity and is characterized in that the plasma cavity comprises a first shell, a second shell and a third shell which are coaxially arranged and sequentially connected;
a cathode element is arranged at the top end of the first shell, an anode element is arranged in the second shell, a magnetic field mechanism is arranged outside the second shell, and a anticathode element is arranged in the third shell;
the penning ion source further comprises a cooling cavity, the cooling cavity is arranged at the top of the first shell, and a cooling liquid in the cooling cavity is in contact with the top end of the first shell and covers the cathode element.
2. The penning ion source of claim 1, wherein a cathode mounting portion is formed at the top end of the first housing, and the cathode element is mounted in the cathode mounting portion;
the cooling cavity comprises a first sealing end cover, the first sealing end cover is sealed on the cathode installation part, a raised guide pipe is arranged on the first sealing end cover, and cooling liquid in the cooling cavity enters the guide pipe and then covers the cathode element.
3. The penning ion source of claim 2, wherein the cooling chamber further comprises a second end cap, the second end cap is coupled to the first end cap, and a gap is formed between the second end cap and the first end cap, the gap being in communication with the flow guide tube.
4. The penning ion source of claim 1, wherein a driving mechanism is disposed between the magnetic field mechanism and the second housing, and the driving mechanism drives the magnetic field mechanism to move axially along the second housing.
5. The penning ion source according to claim 4, wherein the driving mechanism comprises a supporting insulating part and a diamond-shaped telescopic bracket, the magnetic field mechanism is fixedly mounted on the supporting insulating part, the supporting insulating part is slidably connected with the second housing, and two ends of the diamond-shaped telescopic bracket are respectively abutted with the supporting insulating part and the second housing.
6. The penning ion source of claim 4, wherein an insulator is disposed between the anode element and the second housing.
7. The penning ion source of claim 1, wherein the third housing comprises a base flange and a counter-cathode element, the base flange is fixedly connected with the second housing, and the counter-cathode element is disposed in the base flange.
8. The penning ion source of claim 1, wherein the cooling chamber is provided with a liquid inlet and a liquid outlet which are oppositely arranged.
9. The penning ion source of claim 1, wherein the cooling chamber is provided with a sealing flange at an end thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921701555.3U CN211227314U (en) | 2019-10-11 | 2019-10-11 | Penning ion source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921701555.3U CN211227314U (en) | 2019-10-11 | 2019-10-11 | Penning ion source |
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| Publication Number | Publication Date |
|---|---|
| CN211227314U true CN211227314U (en) | 2020-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921701555.3U Active CN211227314U (en) | 2019-10-11 | 2019-10-11 | Penning ion source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115188648A (en) * | 2022-09-08 | 2022-10-14 | 合肥中科离子医学技术装备有限公司 | Internal penning source structure and cyclotron |
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2019
- 2019-10-11 CN CN201921701555.3U patent/CN211227314U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115188648A (en) * | 2022-09-08 | 2022-10-14 | 合肥中科离子医学技术装备有限公司 | Internal penning source structure and cyclotron |
| CN115188648B (en) * | 2022-09-08 | 2022-12-23 | 合肥中科离子医学技术装备有限公司 | Internal penning source structure and cyclotron |
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Effective date of registration: 20230707 Address after: Room 1001, Unit 1, Building 1, No. 1 Yiran Road, Songshanhu Park, Dongguan City, Guangdong Province, 523808 Patentee after: Guoke Neutron Medical Technology Co.,Ltd. Address before: 523808 No. 1318 Building A1, Guangda West Valley, Songshan Lake High-tech Industrial Development Zone, Dongguan City, Guangdong Province Patentee before: DONGGUAN DONGYANGGUANG GAONENG MEDICAL EQUIPMENT Co.,Ltd. |
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