CN203387768U - High-frequency electric focusing high-gradient ion accelerating device - Google Patents
High-frequency electric focusing high-gradient ion accelerating device Download PDFInfo
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- CN203387768U CN203387768U CN201320375926.XU CN201320375926U CN203387768U CN 203387768 U CN203387768 U CN 203387768U CN 201320375926 U CN201320375926 U CN 201320375926U CN 203387768 U CN203387768 U CN 203387768U
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- quadrupole lens
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Abstract
The utility model relates to an ion accelerating device and belongs to the technical field of nuclear energy. A high-frequency electric focusing high-gradient ion accelerating device comprises four mutually-perpendicular T-shaped plates arranged in a vacuum cavity cylinder, and a plurality of drift tubes are respectively fixedly connected between two T-shaped plates through drift tube supporting rods. The drift tubes are located on the same center line as the vacuum cavity cylinder. Vertical high-frequency electric quadrupole lenses are oppositely arranged between the drift tubes and are fixedly connected between the two vertical T-shaped plates. Horizontal high-frequency electric quadrupole lenses are oppositely arranged between the drift tubes and are fixedly connected between the two horizontal T-shaped plates. The high-frequency electric focusing high-gradient ion accelerating device has the following advantages: the quality of high-current ion beams is excellent in acceleration due to the compact structure; an acceleration function and a horizontal and vertical focusing function are combined in the same high-frequency structure, the shunt impedance of a cavity is high, and high-frequency power consumption is greatly reduced; and zero phase is used for acceleration, the acceleration efficiency is higher, the length of the cavity can be effectively reduced, and the effective acceleration gradient is improved.
Description
Technical field
The utility model relates to a kind of ion accelerator, belongs to the nuclear energy technology field.
Background technology
Drift cast accelerator is to grow up in the twenty or thirty age in last century, is accelerating structure commonly used in particle accelerator.Its main acceleration principle is charged particle process accelerating gap, experiences accelerating field; Through half high frequency period, electric field becomes negative electric field, and now particle enters drift tube inside, so can not experience negative electric field, is slowed down; When lower half high frequency period of same process enters next accelerating gap, in accelerating gap, electric field becomes positive electric field, thereby charged particle accelerates in total.
In the drift tube accelerating structure, charged particle is owing to being subject to space charge effect and HF defocusing effect, laterally envelope can be increasing, thereby cause the loss of line, so need to utilize outside focusing original paper to carry out the stable transfer that horizontal pack guarantees line.
Prior art has a kind of DTL of centrifugation, and as shown in Figure 1, this structure is mainly to utilize independently drift tube to accelerate cavity and outside quadrupole lens carries out horizontal pack.
The subject matter of this accelerating structure is:
1. outside quadrupole lens mechanical length is long, causes vertical quality of line very poor, and the ion beam current that is not suitable for Gao Liuqiang accelerates.
2. the power supply that electrostatic quadrupole lens need to mate, cost is higher.
3. element is more, and stability is poor.
Also having a kind of prior art is the IH type accelerating structure of German GSI, and this structure is mainly to utilize a series of drift tube to carry out vertical acceleration and the focusing of line.Then in cavity, utilize very compact magnetostatic quadrupole lens to carry out horizontal pack.This accelerating structure is comprised of a series of acceleration drift tube and the magnetostatic quadrupole lens that is operated in minus phase.The subject matter of this accelerating structure is:
1. accelerating gap is operated in minus phase and guarantees the stable of line, so acceleration efficiency is lower.
2. need extra magnetostatic quadrupole lens to carry out horizontal pack, can greatly reduce the structure factor of cavity, cause the power consumption of cavity to increase, make cavity be difficult under the continuous wave mode of operation.
3. the power supply that electrostatic quadrupole lens need to mate.
4. the process technology difficulty of cavity is large, and especially the installation Collimation Ratio of quadrupole lens in cavity is more difficult.
Summary of the invention
The purpose of this utility model is to avoid the deficiencies in the prior art to provide a kind of high-frequency electrical to focus on the high gradient ion accelerator.With the acceleration of the ion beam current that solves low energy Gao Liuqiang, avoided that low, the high stream intense ion beam of prior art acceleration efficiency stream accelerates poor quality, element is many and involving great expense of causing, the problems such as poor stability.
For achieving the above object, the technical scheme that the utility model is taked is: a kind of high-frequency electrical focuses on the high gradient ion accelerator, its main feature is to include and is provided with four vertical each other T shape plates in the vacuum chamber cylinder, and a plurality of drift tubes are fixed on respectively between two T shape plates by the drift tube support bar; A plurality of drift tubes and vacuum chamber cylinder are on same center line; Vertical high frequency electric quadrupole lens are located between drift tube in opposite directions, and are fixed between two vertical T shape plates; Horizontal high-frequency electrical quadrupole lens is located between drift tube in opposite directions, and is fixed between the T shape plate of two levels.
Described high-frequency electrical focuses on the high gradient ion accelerator, and the vacuum degree of vacuum chamber cylinder is 10
-4-10
-7pa.
Described high-frequency electrical focuses on the high gradient ion accelerator, and described vertical high frequency electric quadrupole lens become 90 degree settings with described horizontal high-frequency electrical quadrupole lens; Described vertical high frequency electric quadrupole lens and described horizontal high-frequency electrical quadrupole lens are located in the vacuum chamber cylinder, between described a plurality of drift tubes.
Described high-frequency electrical focuses on the high gradient ion accelerator, and the drift tube support bar of described adjacent two drift tubes vertically arranges each other.
Described high-frequency electrical focuses on the high gradient ion accelerator, the shape of a saddle that described vertical high frequency electric quadrupole lens are the middle part projection, and the minimum-value aperture between two projections is 1.5-4cm, described vertical high frequency electric quadrupole length of lens is 2cm～30cm; Horizontal high-frequency electrical quadrupole lens is the recessed shape of a saddle, and two maximums diameter of hole between recessed are 2-6cm, and described horizontal high-frequency electrical quadrupole lens length is 2cm～30cm.
Described high-frequency electrical focuses on the high gradient ion accelerator, and the length of described drift tube is 1-10cm; Internal diameter is 1.5cm～5cm, and the accelerating gap distance between adjacent two drift tubes is 1-5cm.
Described high-frequency electrical focuses on the high gradient ion accelerator, between described vertical high frequency electric quadrupole lens and described horizontal high-frequency electrical quadrupole lens and adjacent drift tube apart from being 1-5cm.
The material of described vertical high frequency electric quadrupole lens and described horizontal high-frequency electrical quadrupole lens is metallic copper or stainless steel copper facing.
The beneficial effects of the utility model are in the acceleration of intense pulsed ion beam stream, because structure is compacter, make quality of beam better; This structure will speed up function, and the transverse and longitudinal focusing function is combined in same high-frequency structure, and the cavity shunt impedance is high, and the high frequency power consumption reduces greatly; Utilize zero phase to be accelerated, acceleration efficiency is higher, can effectively reduce the length of cavity, improves effective accelerating gradient.The utility model is mainly used for the acceleration of high current low energy ion line, can be used for the applied accelerator such as injector, industrial accelerator, therapeutic system injector of high-current accelerator.
The accompanying drawing explanation
Fig. 1 is that prior art has the ion of centrifugation to accelerate front view;
Fig. 2 is that the utility model master looks schematic diagram;
The A-A profile that Fig. 3 is Fig. 1;
The B-B profile that Fig. 4 is Fig. 1;
The schematic diagram that Fig. 5 is the utility model vertical high frequency electric quadrupole lens;
The schematic diagram that Fig. 6 is the horizontal high-frequency electrical quadrupole lens of the utility model.
In figure: 1. chamber cylinder; 2.T shape plate; 3. drift tube; 4. vertical high frequency electric quadrupole lens; 5. horizontal high-frequency electrical quadrupole lens;
6. drift tube support bar.
Embodiment
Describe the utility model in detail below in conjunction with accompanying drawing.
Embodiment 1: see Fig. 2, and Fig. 3, Fig. 4, a kind of high-frequency electrical focuses on the high gradient ion accelerator, includes to be provided with each other vertical 2,12 drift tubes 3 of 4 T shape plates to be fixed on respectively between two T shape plates 2 by drift tube support bar 6 in vacuum chamber cylinder 1; 12 drift tubes 3 with vacuum chamber cylinder 1 on same center line; Vertical high frequency electric quadrupole lens 4 are located between drift tube 3 in opposite directions, and are fixed between two vertical T shape plates 2; Horizontal high-frequency electrical quadrupole lens 5 is located between drift tube 3 in opposite directions, and is fixed between the T shape plate 2 of two levels.Vacuum chamber cylinder 1 diameter is 0.3m, and length is 0.5m, and the thickness of T-shaped plate, between 30mm, need to be determined according to mechanical strength.
The vacuum degree of described vacuum chamber cylinder 1 is 10
-4-10
-7pa.
5 one-tenth 90 degree of described vertical high frequency electric quadrupole lens 4 and described horizontal high-frequency electrical quadrupole lens arrange; Described vertical high frequency electric quadrupole lens 4 are located in vacuum chamber cylinder 1 with described horizontal high-frequency electrical quadrupole lens 5, between described 12 drift tubes.
The drift tube support bar 6 of described adjacent two drift tubes 3 vertically arranges each other.
See Fig. 5, the shape of a saddle that described vertical high frequency electric quadrupole lens 4 are the middle part projection, the minimum-value aperture between two projections is 1.5cm, and described vertical high frequency electric quadrupole length of lens is 2cm-8cm, and length increases and increases along with ion velocity.
See Fig. 6, horizontal high-frequency electrical quadrupole lens 5 is the recessed shape of a saddle, and two maximums diameter of hole between recessed are 2cm, and described horizontal high-frequency electrical quadrupole lens length is 2cm-8cm, and length is along with ion velocity increases and increases.
The length of described drift tube 3 is 0.7-3cm, and length increases and increases along with ion velocity; Internal diameter is 1.5cm, and the accelerating gap distance between adjacent two drift tubes 3 is 2cm.
Distance between described vertical high frequency electric quadrupole lens 4 and described horizontal high-frequency electrical quadrupole lens 5 and adjacent drift tube 3 is 1cm.
The material of described vertical high frequency electric quadrupole lens 4 and described horizontal high-frequency electrical quadrupole lens 5 is metallic copper.
Embodiment 2: see Fig. 2, and Fig. 3, Fig. 4, a kind of high-frequency electrical focuses on the high gradient ion accelerator, and primary structure is identical with embodiment 1.Difference is that vacuum chamber cylinder 1 diameter is 1.5m, and length is 6m, and the thickness of T-shaped plate is between 100mm.
The vacuum degree of described vacuum chamber cylinder 1 is 10
-4-10
-7pa.
See Fig. 5, the shape of a saddle that described vertical high frequency electric quadrupole lens 4 are the middle part projection, the minimum-value aperture between two projections is 4cm, and described vertical high frequency electric quadrupole length of lens is 20cm-30cm, and length increases and increases along with ion velocity.
See Fig. 6, horizontal high-frequency electrical quadrupole lens 5 is the recessed shape of a saddle, and two maximums diameter of hole between recessed are 6cm, and described horizontal high-frequency electrical quadrupole lens length is 20cm-30cm, and length is along with ion velocity increases and increases.
The length of described drift tube 3 is 5-10cm, and length increases and increases along with ion velocity; Internal diameter is 5cm, and the accelerating gap distance between adjacent two drift tubes 3 is 5cm.
Distance between described vertical high frequency electric quadrupole lens 4 and described horizontal high-frequency electrical quadrupole lens 5 and adjacent drift tube 3 is 5cm.
The material of described vertical high frequency electric quadrupole lens 4 and described horizontal high-frequency electrical quadrupole lens 5 is stainless steel copper facing.
Embodiment 3: see Fig. 2, and Fig. 3, Fig. 4, a kind of high-frequency electrical focuses on the high gradient ion accelerator, and primary structure is identical with embodiment 1.Difference is that vacuum chamber cylinder 1 diameter is 1m, and length is 3m, and the thickness of T-shaped plate, between 60mm, need to be determined according to mechanical strength.
The vacuum degree of described vacuum chamber cylinder 1 is 10
-4-10
-7pa.
See Fig. 5, the shape of a saddle that described vertical high frequency electric quadrupole lens 4 are the middle part projection, the minimum-value aperture between two projections is 3cm, and described vertical high frequency electric quadrupole length of lens is 5-15cm, and length increases and increases along with ion velocity.
See Fig. 6, horizontal high-frequency electrical quadrupole lens 5 is the recessed shape of a saddle, and two maximums diameter of hole between recessed are 3cm, and described horizontal high-frequency electrical quadrupole lens length is 5-15cm, and length is along with ion velocity increases and increases.
The length of described drift tube 3 is 1.5-5cm, and length increases and increases along with ion velocity; Internal diameter is 3cm, and the accelerating gap distance between adjacent two drift tubes 3 is 3cm.
Distance between described vertical high frequency electric quadrupole lens 4 and described horizontal high-frequency electrical quadrupole lens 5 and adjacent drift tube 3 is 3cm.
The material of described vertical high frequency electric quadrupole lens 4 and described horizontal high-frequency electrical quadrupole lens 5 is metallic copper.
Embodiment 4: see Fig. 2, and Fig. 3, Fig. 4, a kind of high-frequency electrical focuses on the high gradient ion accelerator, and primary structure is identical with embodiment 1.Difference is that vacuum chamber cylinder 1 diameter is 0.6m, and length is 3.5m, and the thickness of T-shaped plate is between 60mm.
The vacuum degree of described vacuum chamber cylinder 1 is 10
-4-10
-7pa.
See Fig. 5, the shape of a saddle that described vertical high frequency electric quadrupole lens 4 are the middle part projection, the minimum-value aperture between two projections is 2cm, and described vertical high frequency electric quadrupole length of lens is 12-20cm, and length increases and increases along with ion velocity.
See Fig. 6, horizontal high-frequency electrical quadrupole lens 5 is the recessed shape of a saddle, and two maximums diameter of hole between recessed are 3cm, and described horizontal high-frequency electrical quadrupole lens length is 12-20cm, and length is along with ion velocity increases and increases.
The length of described drift tube 3 is 2-8cm, and length increases and increases along with ion velocity; Internal diameter is 2cm, and the accelerating gap distance between adjacent two drift tubes 3 is 2.5cm.
Distance between described vertical high frequency electric quadrupole lens 4 and described horizontal high-frequency electrical quadrupole lens 5 and adjacent drift tube 3 is 2cm.
The material of described vertical high frequency electric quadrupole lens 4 and described horizontal high-frequency electrical quadrupole lens 5 is metallic copper.
This ion accelerator is by 1mA's
34+u
238ion beam current accelerates to 1.5MeV/u from 0.3MeV/u, and operating frequency is 80MHz, and the Emittance Growth of line transverse and longitudinal all is less than 5%.The high frequency power of cavity is less than 200KW.
The number of described vertical high frequency electric quadrupole lens 4 and described horizontal high-frequency electrical quadrupole lens 5 and the number of the accelerating gap between it need to calculate according to the requirement of linear accelerator beam dynamics.
The utility model comprises drift tube accelerating part and high-frequency electrical quadrupole lens part.The drift tube accelerating part is mainly used in the acceleration of ion beam current, and the transverse and longitudinal that the high-frequency electrical quadrupole lens partly is mainly used in line focuses on.Drift tube part and high-frequency electrical quadrupole lens some work, in same frequency, are arranged in same high frequency resonate cavity.Wherein the Cycle Length of accelerating gap is (β λ)/2, and locking phase is chosen in zero degree, obtains maximum acceleration efficiency.The high-frequency electrical quadrupole lens is the structure that the debugging coefficient is m (1<m<2.5) d, and length is a β λ, and locking phase is-90 degree, sees Fig. 5, Fig. 6, and this structure can produce horizontal and vertical high-frequency electric field simultaneously, for the transverse and longitudinal pack of line.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (7)
1. a high-frequency electrical focuses on the high gradient ion accelerator, it is characterized in that including being provided with four vertical each other T shape plates in the vacuum chamber cylinder, and a plurality of drift tubes are fixed on respectively between two T shape plates by the drift tube support bar; A plurality of drift tubes and vacuum chamber cylinder are on same center line; Vertical high frequency electric quadrupole lens are located between drift tube in opposite directions, and are fixed between two vertical T shape plates; Horizontal high-frequency electrical quadrupole lens is located between drift tube in opposite directions, and is fixed between the T shape plate of two levels.
2. high-frequency electrical as claimed in claim 1 focuses on the high gradient ion accelerator, and the vacuum degree that it is characterized in that the vacuum chamber cylinder is 10
-4-10
-7pa.
3. high-frequency electrical as claimed in claim 1 focuses on the high gradient ion accelerator, it is characterized in that described vertical high frequency electric quadrupole lens become 90 degree settings with described horizontal high-frequency electrical quadrupole lens; Described vertical high frequency electric quadrupole lens and described horizontal high-frequency electrical quadrupole lens are located in the vacuum chamber cylinder, between described a plurality of drift tubes.
4. high-frequency electrical as claimed in claim 1 focuses on the high gradient ion accelerator, it is characterized in that adjacent two drift tube support bars of described a plurality of drift tubes vertically arrange each other.
5. high-frequency electrical as claimed in claim 1 focuses on the high gradient ion accelerator, it is characterized in that the shape of a saddle that described vertical high frequency electric quadrupole lens are the middle part projection, minimum-value aperture between two projections is 1.5-4cm, and described vertical high frequency electric quadrupole length of lens is 2cm～30cm; Horizontal high-frequency electrical quadrupole lens is the recessed shape of a saddle, and two maximums diameter of hole between recessed are 2-6cm, and described horizontal high-frequency electrical quadrupole lens length is 2cm～30cm.
6. high-frequency electrical as claimed in claim 1 focuses on the high gradient ion accelerator, and the length that it is characterized in that described drift tube is 0.7-10cm; Internal diameter is 1.5cm～5cm, and the accelerating gap distance between adjacent two drift tubes of described a plurality of drift tubes is 1-5cm.
7. high-frequency electrical as claimed in claim 1 focuses on the high gradient ion accelerator, it is characterized in that described vertical high frequency electric quadrupole lens and described horizontal high-frequency electrical quadrupole lens and the distance between adjacent drift tube are 1-5cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320375926.XU CN203387768U (en) | 2013-06-27 | 2013-06-27 | High-frequency electric focusing high-gradient ion accelerating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320375926.XU CN203387768U (en) | 2013-06-27 | 2013-06-27 | High-frequency electric focusing high-gradient ion accelerating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203387768U true CN203387768U (en) | 2014-01-08 |
Family
ID=49876213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320375926.XU Withdrawn - After Issue CN203387768U (en) | 2013-06-27 | 2013-06-27 | High-frequency electric focusing high-gradient ion accelerating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203387768U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103354696A (en) * | 2013-06-27 | 2013-10-16 | 中国科学院近代物理研究所 | High-frequency electric-focusing high-gradient ion acceleration apparatus |
| CN107896415A (en) * | 2017-10-17 | 2018-04-10 | 中国科学院近代物理研究所 | Compact high frequency electrofocusing mixes accelerating cavity |
-
2013
- 2013-06-27 CN CN201320375926.XU patent/CN203387768U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103354696A (en) * | 2013-06-27 | 2013-10-16 | 中国科学院近代物理研究所 | High-frequency electric-focusing high-gradient ion acceleration apparatus |
| CN103354696B (en) * | 2013-06-27 | 2016-01-13 | 中国科学院近代物理研究所 | High-frequency electrical focuses on high gradient ion accelerator |
| CN107896415A (en) * | 2017-10-17 | 2018-04-10 | 中国科学院近代物理研究所 | Compact high frequency electrofocusing mixes accelerating cavity |
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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: 20140108 Effective date of abandoning: 20160113 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140108 Effective date of abandoning: 20160113 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |