CN109936909B - Fixing structure of drift tube and interdigital drift tube accelerator - Google Patents
Fixing structure of drift tube and interdigital drift tube accelerator Download PDFInfo
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- CN109936909B CN109936909B CN201910262300.XA CN201910262300A CN109936909B CN 109936909 B CN109936909 B CN 109936909B CN 201910262300 A CN201910262300 A CN 201910262300A CN 109936909 B CN109936909 B CN 109936909B
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- drift tube
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- 238000000034 method Methods 0.000 claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 238000005516 engineering process Methods 0.000 claims description 4
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 2
- 238000003466 welding Methods 0.000 description 13
- 238000009434 installation Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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Abstract
The invention discloses a fixed structure of a drift tube and an interdigital drift tube accelerator, wherein the fixed structure comprises: the first side surface of the supporting seat is provided with a matching hole; the drift tube is arranged on the supporting seat, and the positioning column extends into the matching hole; and an electrical seal member electrically sealed between the mounting end face and the first side face. According to the fixing structure, the first side surface of the supporting seat is provided with the matching hole, the mounting end surface of the drift tube is protruded with the positioning column, the drift tube is mounted on the supporting seat, the positioning column extends into the matching hole and is matched with the matching hole, so that the position of the drift tube on the supporting seat is ensured, the electric sealing element is sealed between the mounting end surface and the first side surface, the drift tube can be fixed on the first side surface by using a screw locking mode and the like, and the electric sealing requirement of the drift tube and the supporting seat is better met; moreover, the method is convenient to process and low in cost.
Description
Technical Field
The present invention relates to the technical field of accelerator equipment, in particular to a fixed structure of a drift tube and an interdigital drift tube accelerator.
Background
The prior interdigital drift tube accelerator generally adopts two modes to fix a drift tube on a supporting seat;
1. welded fastening
Because the conventional choice of drift tube material is TU1 or better TU0, this solder attachment limits the material of the element and the manner of soldering:
a. confinement of materials
Because the welding mode is adopted for fixing, the thermal deformation coefficients of the two welding parties need to be considered during welding, and generally the thermal deformation coefficients are not greatly different or the same material is selected for welding; therefore, the material of the supporting seat is generally selected from TU1 or TU 0;
b. limitation of welding mode
Because the surface finish requirement of the inner element of the accelerator is high due to the characteristics of the accelerator, the finish of the welding seam position is poor due to the adoption of conventional welding, and the requirement of the accelerator cannot be met; general welding needs brazing or electron beam welding, the two welding modes are high in manufacturing cost, and welding of elements with large sizes is not easy to achieve;
the situation that welding deformation and the like are difficult to control is comprehensively considered, so that the functionality of the accelerator is reduced indirectly, and the welding cost is relatively high;
2. screw fixation
The conventional screw fixing mode has two modes
One is to process a mounting hole on a supporting seat, fix the supporting seat on a cavity, and then fix the drift tube on the supporting seat by using a screw; this connection leads to double electrical sealing and positional accuracy adjustment problems; the hidden trouble is generated in the later installation and adjustment;
the other is that supporting seat and cavity integrated into one piece process, processing the mounting hole on the supporting seat, punch on the drift tube base, adopt the fixed mode of screw to fix the drift tube on the supporting seat, because the reason of drift tube design, the fixed screw interval on the drift tube is far away, workable, but can't satisfy drift tube bottom surface stress requirement and electric sealing requirement. If reduce set screw interval, when satisfying the electricity as far as possible and seal, the head of drift tube can shelter from the supporting seat, and difficult processing designs and processes the degree of difficulty great.
Disclosure of Invention
In order to solve at least one of the above technical problems, a fixing structure of a drift tube is provided herein, which can better satisfy the electrical sealing requirements of the drift tube and the supporting seat and the stress requirements of the bottom surface of the drift tube, and is easy to process and low in cost.
The fixing structure of the drift tube provided by the embodiment of the invention comprises: the first side surface of the supporting seat is provided with a matching hole; the mounting end face of the drift tube is provided with a positioning column in a protruding mode, the drift tube is mounted on the supporting seat, and the positioning column extends into the matching hole; and an electrical seal electrically sealed between the mounting end face and the first side face.
Optionally, a first annular groove arranged along the circumferential direction of the positioning column is arranged on the mounting end face, and the electric sealing element is mounted in the first annular groove.
Optionally, the electrical seal is an indium wire.
Optionally, the fixing structure of the drift tube further comprises: and the matching hole is a through hole, and the process end cover seals one end of the through hole, which is far away from the drift tube.
Optionally, the fixing structure of the drift tube further comprises: the sealing member, the mating holes is the shoulder hole, the ladder face of shoulder hole is dorsad the drift tube, the technology end cover supports and presses on the ladder face, the sealing member is sealed the technology end cover with between the ladder face.
Optionally, the positioning column is provided with an internal threaded hole, and a threaded end of the screw passes through the process end cover and is screwed on the internal threaded hole to fix the process end cover.
Optionally, a second annular groove is provided in the process end cap, and the seal member is located in the second annular groove.
Optionally, the seal is an O-ring.
Optionally, a through hole is further formed in the mounting end face, a screw hole is formed in the first side face, and a screw penetrates through the through hole and is screwed in the screw hole.
Optionally, the through hole, the screw hole and the screw include multiple sets arranged at intervals along the circumferential direction of the positioning column.
The interdigital drift tube accelerator provided by the invention comprises the fixing structure of the drift tube in any embodiment, the supporting seat is a cavity, and the drift tube is positioned in the cavity.
Compared with the prior art, the first side surface of the supporting seat is provided with the matching hole, the mounting end surface of the drift tube is provided with the positioning column in a protruding mode, the drift tube is mounted on the supporting seat, the positioning column extends into the matching hole and is matched with the matching hole, so that the position of the drift tube on the supporting seat is ensured, the electric sealing element is sealed between the mounting end surface and the first side surface, the drift tube can be fixed on the first side surface by using a screw locking mode and the like, and the electric sealing requirements of the drift tube and the supporting seat are better met; moreover, the method is convenient to process and low in cost. Two screws above and one screw below can be used for fixing the drift tube and the supporting seat, and the stress of the bottom surface of the drift tube is improved.
Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the disclosure. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the embodiments herein and are incorporated in and constitute a part of this specification, illustrate embodiments herein and are not to be construed as limiting the embodiments herein.
Fig. 1 is a schematic cross-sectional structural view of a fixing structure of a drift tube according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of an interdigital drift tube accelerator according to an embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 and fig. 2 is:
the method comprises the following steps of 1, supporting seat, 11 matching holes, 2 drift tubes, 21 positioning columns, 22 first annular grooves, 3 electric sealing parts, 4 process end covers, 61 installation end faces and 62 first side faces.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, however, the present disclosure may be practiced otherwise than as specifically described herein, and thus the scope of the present disclosure is not limited by the specific embodiments disclosed below.
The fixing structure of the drift tube provided by the embodiment of the invention, as shown in fig. 1, includes: the supporting seat 1 is provided with a matching hole 11 on a first side surface 62; the drift tube 2 is provided with a positioning column 21 protruding from the mounting end surface 61, the drift tube 2 is mounted on the supporting seat 1, and the positioning column 21 extends into the matching hole 11; and an electrical seal 3 electrically sealed between the mounting end face 61 (shown in fig. 2) and the first side face 62.
According to the fixing structure of the drift tube, the first side surface 62 of the supporting seat 1 is provided with the matching hole 11, the mounting end surface 61 of the drift tube 2 is protruded with the positioning column 21, the drift tube 2 is mounted on the supporting seat 1, the positioning column 21 extends into the matching hole 11 and is matched with the matching hole 11, so that the position of the drift tube 2 on the supporting seat 1 is ensured, and the electric sealing element 3 is sealed between the mounting end surface 61 and the first side surface 62, so that the electric sealing requirements of the drift tube 2 and the supporting seat 1 are better met; moreover, the method is convenient to process and low in cost.
The position relation between the positioning column 21 and the matching hole 11 is ensured through the matching (clearance fit) between the matching hole 11 and the positioning column 21, and the matching precision of the positioning column 21 and the positioning hole is ensured by depending on the processing precision, so that the horizontal position of the drift tube 2 on the supporting seat 1 is ensured.
The cross section of the positioning column 21 and the matching hole 11 can be of a non-circular structure so as to prevent the two from rotating relatively; when the cross sections of the positioning column 21 and the fitting hole 11 are circular structures, a through hole may be provided on the mounting end surface 61, a screw hole may be provided on the first side surface 62, and a screw (see the dotted line in fig. 2) may be screwed into the screw hole through the through hole to fix the drift tube 2 on the support base 1.
The through holes, the screw holes and the screws may be a group, or the through holes, the screw holes and the screws may also include multiple groups (preferably two groups symmetrically arranged) arranged at intervals along the circumferential direction of the positioning column 21, which all can achieve the purpose of the present application, and the purpose of the present application does not depart from the design concept of the present invention, and thus the present application is not described herein again, and all of the present application shall fall within the protection scope of the present application.
Specifically, as shown in fig. 1, a first annular groove 22 is formed in the mounting end surface 61 and arranged along the circumferential direction of the positioning column 21, and the electric sealing element 3 is mounted in the first annular groove 22, so that the electric sealing between the drift tube 2 and the support seat 1 is ensured to be more reliable. The electrical seal 3 may be an indium wire or the like.
As shown in fig. 1, the fixing structure of the drift tube further includes: in the process end cover 4, the matching hole 11 is a through hole, the process end cover 4 seals one end of the through hole, which is far away from the drift tube 2, when the fixing structure of the drift tube is applied to an interdigital drift tube accelerator, the supporting seat 1 is a cavity, the drift tube 2 is positioned in the cavity, in order to better ensure the processing precision, the matching hole 11 is preferably processed from the outer surface of the cavity to the cavity, and the process end cover 4 is used for sealing and blocking the outer end of the matching hole 11.
Specifically, the fixed structure of the drift tube further comprises: the matching hole 11 of the sealing element is a stepped hole, the stepped surface of the stepped hole faces away from the drift tube 2, the process end cover 4 is pressed against the stepped surface, and the sealing element is sealed between the process end cover 4 and the stepped surface, so that a hole section between the process end cover 4 and the drift tube 2 forms a closed space, for example, a vacuum cavity is formed. A second annular groove can be formed in the process end cover 4, and a sealing element is located in the second annular groove and used for positioning the sealing element, so that the assembling performance of the sealing element is improved. The seal may be an O-ring. The positioning post 21 is provided with an internal threaded hole, and the threaded end of the screw passes through the technical end cap 4 and is screwed on the internal threaded hole to fix the technical end cap 4 (as shown in fig. 2). The drift tube 2 and the support base 1 are fixed by using two upper screws and one lower screw, so that the stress of the bottom surface of the drift tube 2 is improved.
As shown in fig. 2, the interdigital drift tube accelerator provided by the present invention includes the drift tube fixing structure according to any of the above embodiments, wherein the supporting seat 1 is a cavity, and the drift tube 2 is located in the cavity.
The interdigital drift tube accelerator provided by the invention has all the advantages of the fixed structure of the drift tube described in any embodiment, and details are not repeated herein.
In summary, in the fixing structure of the drift tube provided by the invention, the first side surface of the supporting seat is provided with the matching hole, the mounting end surface of the drift tube is protruded with the positioning column, the drift tube is mounted on the supporting seat, the positioning column extends into the matching hole and is matched with the matching hole, so that the position of the drift tube on the supporting seat is ensured, the electric sealing element is sealed between the mounting end surface and the first side surface, and the drift tube can be fixed on the first side surface by using a screw locking mode and the like, so that the electric sealing requirements of the drift tube and the supporting seat are better met; moreover, the method is convenient to process and low in cost. The drift tube and the support seat can be fixed by two upper screws and one lower screw, so that the stress of the bottom surface of the drift tube is improved.
In the description herein, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., "connected" may be a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms herein can be understood by those of ordinary skill in the art as appropriate.
In the description of the specification, reference to the term "one embodiment," "some embodiments," "a specific embodiment," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example herein. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments disclosed herein are described above, the descriptions are only for the convenience of understanding the embodiments and are not intended to limit the disclosure. 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 disclosure, and that the scope of the disclosure herein may be limited only by the appended claims.
Claims (7)
1. A drift tube fixing structure, comprising:
the first side surface of the supporting seat is provided with a matching hole;
the mounting end face of the drift tube is provided with a positioning column in a protruding mode, the drift tube is mounted on the supporting seat, and the positioning column extends into the matching hole;
an electrical seal electrically sealed between the mounting end face and the first side face; and
the process end cover is a through hole, one end of the through hole, far away from the drift tube, is sealed by the process end cover, an internal thread hole is formed in the positioning column, and a threaded end of a screw penetrates through the process end cover and is screwed on the internal thread hole so as to fix the process end cover;
the mounting end face is provided with a through hole, the first side face is provided with a screw hole, a screw penetrates through the through hole and is screwed in the screw hole, and the through hole, the screw hole and the screw comprise circumferential intervals along the positioning columns and are arranged on two groups of two sides of the through hole.
2. The drift tube fixing structure according to claim 1, wherein a first annular groove is formed in the mounting end surface and arranged along a circumferential direction of the positioning column, and the electric sealing member is mounted in the first annular groove.
3. The drift tube mounting structure of claim 2, wherein said electrical seal is an indium wire.
4. The drift tube fixing structure according to any one of claims 1 to 3,
the sealing member, the mating holes is the shoulder hole, the ladder face of shoulder hole is dorsad the drift tube, the technology end cover supports and presses on the ladder face, the sealing member is sealed the technology end cover with between the ladder face.
5. The drift tube attachment structure of claim 4 wherein said process end cap has a second annular groove formed therein, said seal being located in said second annular groove.
6. The drift tube attachment structure of claim 5, wherein said seal is an O-ring.
7. An interdigital drift tube accelerator, comprising a fixed structure of a drift tube according to any of claims 1 to 6, wherein said support base is a cavity, and said drift tube is located within said cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910262300.XA CN109936909B (en) | 2019-04-02 | 2019-04-02 | Fixing structure of drift tube and interdigital drift tube accelerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910262300.XA CN109936909B (en) | 2019-04-02 | 2019-04-02 | Fixing structure of drift tube and interdigital drift tube accelerator |
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| Publication Number | Publication Date |
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| CN109936909A CN109936909A (en) | 2019-06-25 |
| CN109936909B true CN109936909B (en) | 2020-09-04 |
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| CN201910262300.XA Active CN109936909B (en) | 2019-04-02 | 2019-04-02 | Fixing structure of drift tube and interdigital drift tube accelerator |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113784495A (en) * | 2021-09-10 | 2021-12-10 | 中山大学 | High-gradient and high-strength harmonic accelerator |
| CN115515292B (en) * | 2022-10-20 | 2024-06-21 | 中国科学院上海高等研究院 | Proton injector |
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