CN205726634U - A kind of ion accelerating tube - Google Patents
A kind of ion accelerating tube Download PDFInfo
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- CN205726634U CN205726634U CN201620546183.1U CN201620546183U CN205726634U CN 205726634 U CN205726634 U CN 205726634U CN 201620546183 U CN201620546183 U CN 201620546183U CN 205726634 U CN205726634 U CN 205726634U
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Abstract
This utility model provides a kind of ion accelerating tube, and described accelerating tube is used for electrostatic high-pressure type ion accelerator.Ion accelerating tube of the present utility model uses Modular Structure Design, and the accelerating potential of each acceleration of ions tube module is about 250kV, and a number of ion accelerating tube block coupled in series gets up, and can obtain required superelevation accelerating potential.Acceleration of ions tube module is divided into strong-focusing accelerating region and space charge neutralization district, is used for eliminating ion beam self space charge effect, can accelerate to transmit the ion beam more than 1mA.Meanwhile, acceleration of ions tube module also has secondary electron high inhibition structure, when composition adds speed system more than the extra-high pressure of 5MV terminal voltage, can effectively prevent the appearance of " full voltage effect ".Ion accelerating tube of the present utility model can obtain terminal voltage more than 5MV, the beam intensity direct-current ion bundle more than 1mA.Ion accelerating tube of the present utility model is suitable in field application such as ion implanting, ion beam therapy tumor, nucleopore membranes production, neutron photographies.
Description
Technical field
This utility model belongs to Nuclear Technology and Applications field, is specifically related to a kind of ion accelerating tube.
Background technology
Before high energy intense pulsed ion beam has a very wide range of applications in terms of material modification, oncotherapy and Physical Experiment
Scape, at present, a kind of mode is to use radiofrequency ion accelerator, is provided that energy is more than 3MeV, the beam intensity high current more than 1mA
Ion beam, but, technical difficulty is high, and the ion beam of generation can dissipate greatly；Another mode is to use electrostatic high-pressure ion to add
Speed device, ion beam can dissipate less, and the energy conversion efficiency of complete machine is high, and operating cost is low, is suitable for commercial applications, but, at bundle
When intensity of flow is more than 1mA, terminal voltage ratio is relatively low, at below 1MV." physical Design of 400 kV high intensity proton beam " (core
Periodical " atomic energy science and technology ", in December, 2012, the 12nd phase of volume 46) disclose a kind of electrostatic high-pressure ion accelerator,
Can be up to the ion beam of hundred milliamperes of ranks with output bundle intensity of flow, its terminal voltage is at below 1MV." China's high-voltage accelerator technology
And application progress " (2004, the 7th national member representative assembly of particle accelerator association and symposium) disclose end
The voltage electrostatic high-pressure ion accelerator more than 5MV, but beam intensity is the highest, within 300uA.
At present, lack simple in construction, may be used for more than 5MV terminal voltage, the beam intensity electrostatic high-pressure more than 1mA from
Sub-accelerating tube.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of ion accelerating tube.
Ion accelerating tube of the present utility model, is characterized in, described ion accelerating tube includes that inlet focus accelerates electrode
I, inlet focus accelerates electrode II, the middle electrode I that accelerates, the middle electrode II that accelerates, and outlet defocuses acceleration electrode I, and outlet defocuses
Accelerating electrode II, entrance stops electrode, drift tube, and outlet stops electrode；Ion beam is entering the injection of opening's edge axis, accelerates focusing on
Electrode I and inlet focus accelerate electrode II interval acquisition electric field acceleration and focusing, accelerate electrode I afterwards and centre adds in the middle of entrance
Speed electrode II obtains electric field acceleration, enters outlet afterwards and defocuses acceleration electrode I and outlet defocuses acceleration electrode II and obtains electric field and add
Speed and defocus, then, ion beam by entrance stop electrode, enter drift tube, finally, ion beam from outlet stop electrode defeated
Go out；
Described inlet focus accelerates the trochoidal surface that the entrance of electrode I is tilt alpha angle, and the aperture of entrance is d1, α
The scope at angle is 20 °～40 °, and interlude is to wait straight section, and the aperture waiting straight section is d2, and outlet section is cirque structure, outlet section
Internal diameter be d3, d1 < d3 < d2；
Described inlet focus opens the circular hole flat board of diameter d4, d3 < d4 centered by accelerating electrode II；
Open the circular hole flat board of diameter d5 centered by accelerating electrode I in the middle of described, open straight centered by middle acceleration electrode II
The circular hole flat board of footpath d6, d4 < d5, d5=d6；
It is consistent with the structure that inlet focus accelerates electrode II that described outlet defocuses acceleration electrode I, accelerates with inlet focus
Electrode II is arranged in specular, d7=d4；
It is consistent with the structure that inlet focus accelerates electrode I that described outlet defocuses acceleration electrode II, accelerates with inlet focus
Electrode I is arranged in specular, d8=d3, d9=d2, d10=d1.
Described entrance stops electrode and outlet to stop electrode to have identical current potential, and current potential is less than the current potential of drift tube.
The current potential that described drift tube defocuses acceleration electrode with outlet is identical.
The external operating environment of described ion accelerating tube is the SF6 gas under 5-8 atmospheric pressure.
Ion accelerating tube population structure of the present utility model is divided into two big regions: high gradient accelerating region, space charge neutralization
District.Outside accelerating tube, equally distributed, voltage gradient is than relatively low electrode slice, presses in the middle part of axis alignment from accelerating tube two ends
Contracting, forms high gradient accelerating region at interlude, simultaneously in the two ends of accelerating tube leave the space charge not having accelerating field
And district.High gradient accelerating region has strong-focusing ability, can offset the space charge effect of milliampere level ion beam, completes acceleration
While ion beam, moreover it is possible to ion beam is formed strong-focusing, it is ensured that the smooth transmission of ion beam.In space charge neutralization district, from
Son bundle ionization by collision residual gas molecule, forms electron cloud, offsets the space charge effect of ion beam so that the scattering of ion beam
Angle will not quickly increase, it is ensured that ion beam transmits smoothly.High gradient accelerating region includes that inlet focus accelerates electrode I, inlet focus
Accelerate electrode II, middle accelerate electrode I, middle accelerate electrode II, outlet defocuses acceleration electrode I, outlet defocuses acceleration electrode II；
Inlet focus accelerate electrode I entrance be tilt alpha angle trochoidal surface, the aperture of entrance be the scope at d1, α angle be 20 °～
40 °, interlude is the drum surface of indent, and the aperture of interlude is d2, and outlet section is cirque structure, and the aperture of outlet section is
< d3 < d2, it is that < d4, inlet focus accelerates electrode I and inlet focus adds for d4, d3 that inlet focus accelerates the aperture of electrode II for d3, d1
Speed electrode II together, forms the focusing electric field of strong indent in porch, and ion beam obtains and accelerates and strong-focusing.Outlet defocuses and adds
Speed electrode I is consistent with the structure that inlet focus accelerates electrode II, arranges in specular, d7=d4, and outlet defocuses acceleration electrode II
Consistent with the structure that inlet focus accelerates electrode I, to arrange in specular, d8=d3, d9=d2, d10=d1, outlet defocuses acceleration
Electrode I defocuses with outlet together with acceleration electrode II, forms the electric field that defocuses of strong evagination in exit, ion beam obtain accelerate and
Defocus by force.The combined effect that entrance strong-focusing and outlet defocus by force is to form strong-focusing characteristic.Owing to importing and exporting the electrode at two ends
Sheet runs track near ion beam, is easily subject to the bombardment of stray ion, produces offspring, therefore, imports and exports the electricity at two ends
Pole piece surface inclined and the surface of circular arc, form local dip electric field, to the offspring produced on neighbouring electrode slice
Oblique acceleration so that it is quickly off-center track, bombards on other electrode slices, it is impossible to form transmission and the acceleration of distance,
Inhibit the approach forming cascade collision passage, thus avoid accelerating tube that " full voltage effect " occurs.Middle acceleration electrode I He
Ion beam is only accelerated by the middle electrode II that accelerates, and its open pore size is more much larger than the aperture on the electrode slice of import and export, can exempt from
Bombarded by too much stray ion.Space charge neutralization district is stoped electrode, outlet to stop electrode and drift pipe to constitute by entrance, drift
It is identical that pipe current potential and the outlet of high gradient accelerating region defocus acceleration electrode II, and entrance stops electrode and outlet to stop the current potential of electrode
Lower than the current potential of drift pipe.Residual gas molecule within drift pipe, under the collision of ion beam, produces substantial amounts of electronics and just
Ion, cation is extrapolated by ion beam, scatters on drift tube wall.Electronics, under the attraction of ion beam, is gathered in ion beam and leads to
Near road, forming electron cloud, ion beam passes in electron cloud, and electron cloud offsets most of space charge effect that ion beam produces
Should, ion beam will not fast spread, can keep reasonable beam transfer quality, it is simple to follow-up accelerating tube smoothly accelerate transmission from
Son bundle.At drift pipe two ends, entrance stops electrode and outlet to stop the nagative potential of electrode will to stop the two of the internal generation of drift pipe
Secondary electronics overflows, and is conducive to keeping high density electron cloud inside drift pipe.Connect with adpting flange between ion accelerating tube, screen
Covering electrode for protecting insulating supporting ring not bombarded by stray particulate, entrance stops electrode and outlet to stop the nagative potential of electrode
Introduced by high tension terminal.
Ion accelerating tube of the present utility model, more piece ion accelerating tube is together in series, it is possible to obtain terminal voltage more than 5MV,
The beam intensity ion accelerating tube more than 1mA.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of ion accelerating tube of the present utility model；
In figure, 1. inlet focus accelerates to accelerate in electrode I 4. in the middle of electrode I 2. inlet focus acceleration electrode II 3.
Between accelerate electrode II 5. outlet defocus acceleration electrode I 6. outlet defocus acceleration electrode II 7. entrance stop electrode 8. float
Move pipe 9. outlet and stop electrode 10. adpting flange 11. bucking electrode 12. insulating supporting ring 13. high tension terminal.
Detailed description of the invention
This utility model is described in detail below in conjunction with the accompanying drawings with embodiment.
Ion accelerating tube of the present utility model, described ion accelerating tube includes that inlet focus accelerates electrode I 1, and entrance gathers
The burnt electrode II 2 that accelerates, the middle electrode I 3 that accelerates, the middle electrode II 4 that accelerates, outlet defocuses acceleration electrode I 5, and outlet defocuses acceleration
Electrode II 6, entrance stops electrode 7, drift tube 8, and outlet stops electrode 9；Ion beam is entering the injection of opening's edge axis, accelerates focusing on
Electrode I 1 and inlet focus accelerate that electrode II 2 is interval obtains electric field acceleration and focusing, enter afterwards in the middle of accelerate electrode I 3 and in
Between accelerate electrode II 4 obtain electric field acceleration, afterwards enter outlet defocus acceleration electrode I 5 and outlet defocus acceleration electrode II 6 obtain
Electric field acceleration and defocusing, then, ion beam stops electrode 7 by entrance, enters drift tube 8, and finally, ion beam stops from outlet
Electrode 9 exports；
Described inlet focus accelerates the trochoidal surface that the entrance of electrode I 1 is tilt alpha angle, and the aperture of entrance is d1,
The scope at α angle is 20 °～40 °, and interlude is to wait straight section, and the aperture waiting straight section is d2, and outlet section is cirque structure, outlet section
Internal diameter be d3, d1 < d3 < d2；
Described inlet focus opens the circular hole flat board of diameter d4, d3 < d4 centered by accelerating electrode II 2；
Open the circular hole flat board of diameter d5 centered by accelerating electrode I 3 in the middle of described, open centered by middle acceleration electrode II 4
The circular hole flat board of diameter d6, d4 < d5, d5=d6；
It is consistent with the structure that inlet focus accelerates electrode II 2 that described outlet defocuses acceleration electrode I 5, adds with inlet focus
Speed electrode II 2 is arranged in specular, d7=d4；
It is consistent with the structure that inlet focus accelerates electrode I 1 that described outlet defocuses acceleration electrode II 6, adds with inlet focus
Speed electrode I 1 is arranged in specular, d8=d3, d9=d2, d10=d1.
Described entrance stops electrode 7 and outlet to stop electrode 9 to have identical current potential, and current potential is less than the electricity of drift tube 8
Position.
The current potential that described drift tube 8 defocuses acceleration electrode 6 with outlet is identical.
The external operating environment of described ion accelerating tube is the SF6 gas under 5-8 atmospheric pressure.
X, Y, Z in figure is coordinate system.
Embodiment 1
The ion beam of accelerated transmission is deuterium ion bundle, beam intensity 1mA, often joint accelerating tube module both end voltage 250kV,
Length 200mm, average accelerating gradient 1.25MV/m, 13 grades of ceramic insulation ring, external operating environment is the high pressure SF of 0.6MPa6Gas
Body, inlet focus accelerates electrode I 1 and exports the aperture defocusing acceleration electrode II 6 is 30mm, entry accelerated focusing electrode II 2 He
It is 50mm that outlet defocuses the aperture of acceleration electrode I 5, and the middle aperture accelerating electrode I 3 and middle acceleration electrode II 4 is 70mm, drift
Move pipe 8 length 80mm, stop electrode 7 identical with the current potential stoping electrode 9,2kV lower than the current potential of drift tube 8.20 joints are identical
Ion accelerating tube module assembled together, forms a length of 4 meters, and total accelerating potential is the supertension high current ion accelerating tube of 5MV,
Output energy 5MeV, beam intensity 1mA, the beam cross section diameter deuterium ion bundle less than 15mm.
Embodiment 2
The ion beam of accelerated transmission is proton beam, beam intensity 2mA, often joint accelerating tube both end voltage 225kV, length
200mm, average accelerating gradient 1.125MV/m, 13 grades of ceramic insulation ring, external operating environment is the high pressure SF of 0.6MPa6Gas,
Inlet focus accelerates electrode I 1 and exports the aperture defocusing acceleration electrode II 6 is 30mm, entry accelerated focusing electrode II 2 and outlet
The aperture defocusing acceleration electrode I 5 is 50mm, and the middle aperture accelerating electrode I 3 and middle acceleration electrode II 4 is 70mm, drift tube
8 length 80mm, stop electrode 7 identical with the current potential stoping electrode 9,2kV lower than the current potential of drift tube 8.The acceleration that 36 joints are identical
Pipe fits together, and forms a length of 7.2 meters, and total accelerating potential is the supertension high current ion accelerating tube of 8MV, exports energy
8MeV, beam intensity 2mA, the beam cross section diameter proton beam less than 10mm.
Finally it should be noted that above detailed description of the invention is only in order to illustrate the technical solution of the utility model rather than limit
System, although being described in detail this utility model with reference to preferred embodiment, it will be understood by those within the art that,
The technical solution of the utility model can be modified or equivalent, without deviating from the essence of technical solutions of the utility model
God and scope, it all should be contained in the middle of right of the present utility model.
Claims (3)
1. an ion accelerating tube, it is characterised in that described ion accelerating tube includes that inlet focus accelerates electrode I (1), entrance
Focusing on and accelerate electrode II (2), the middle electrode I (3) that accelerates, the middle electrode II (4) that accelerates, outlet defocuses acceleration electrode I (5), goes out
Mouth defocuses acceleration electrode II (6), and entrance stops electrode (7), drift tube (8), and outlet stops electrode (9)；Ion beam is entering opening's edge
Axis injects, and accelerates electrode II (2) interval at focusing acceleration electrode I (1) and inlet focus and obtains electric field acceleration and focusing, afterwards
Accelerate electrode I (3) in the middle of entering and the middle electrode II (4) that accelerates obtains electric field acceleration, enter outlet afterwards and defocus acceleration electrode I
(5) defocusing acceleration electrode II (6) and obtain electric field acceleration with outlet and defocus, then, ion beam stops electrode (7) by entrance,
Entering drift tube (8), finally, ion beam stops electrode (9) output from outlet；
Described inlet focus accelerates the trochoidal surface that the entrance of electrode I (1) is tilt alpha angle, and the aperture of entrance is d1, α
The scope at angle is 20 °～40 °, and interlude is to wait straight section, and the aperture waiting straight section is d2, and outlet section is cirque structure, outlet section
Internal diameter be d3, d1 < d3 < d2；
Described inlet focus opens the circular hole flat board of diameter d4, d3 < d4 centered by accelerating electrode II (2)；
Open the circular hole flat board of diameter d5 centered by accelerating electrode I (3) in the middle of described, open centered by middle acceleration electrode II (4)
The circular hole flat board of diameter d6, d4 < d5, d5=d6；
It is consistent with the structure that inlet focus accelerates electrode II (2) that described outlet defocuses acceleration electrode I (5), adds with inlet focus
Speed electrode II (2) is arranged in specular, d7=d4；
It is consistent with the structure that inlet focus accelerates electrode I (1) that described outlet defocuses acceleration electrode II (6), adds with inlet focus
Speed electrode I (1) is arranged in specular, d8=d3, d9=d2, d10=d1.
Ion accelerating tube the most according to claim 1, it is characterised in that described entrance stops electrode (7) and outlet resistance
Only electrode (9) has identical current potential, and current potential is less than the current potential of drift tube (8).
Ion accelerating tube the most according to claim 1, it is characterised in that described drift tube (8) and outlet defocus acceleration electricity
The current potential of pole II (6) is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620546183.1U CN205726634U (en) | 2016-06-07 | 2016-06-07 | A kind of ion accelerating tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620546183.1U CN205726634U (en) | 2016-06-07 | 2016-06-07 | A kind of ion accelerating tube |
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| Publication Number | Publication Date |
|---|---|
| CN205726634U true CN205726634U (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620546183.1U Withdrawn - After Issue CN205726634U (en) | 2016-06-07 | 2016-06-07 | A kind of ion accelerating tube |
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| CN (1) | CN205726634U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105873349A (en) * | 2016-06-07 | 2016-08-17 | 中国工程物理研究院核物理与化学研究所 | Ion acceleration tube |
| CN106783466A (en) * | 2016-12-27 | 2017-05-31 | 四川智研科技有限公司 | A kind of accelerated electron beam stream optical texture |
-
2016
- 2016-06-07 CN CN201620546183.1U patent/CN205726634U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105873349A (en) * | 2016-06-07 | 2016-08-17 | 中国工程物理研究院核物理与化学研究所 | Ion acceleration tube |
| CN106783466A (en) * | 2016-12-27 | 2017-05-31 | 四川智研科技有限公司 | A kind of accelerated electron beam stream optical texture |
| CN106783466B (en) * | 2016-12-27 | 2019-04-02 | 四川智研科技有限公司 | A kind of accelerated electron beam stream optical texture |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161123 Effective date of abandoning: 20171201 |
|
| AV01 | Patent right actively abandoned |