CN105934066A - Particle beam accelerator - Google Patents
Particle beam accelerator Download PDFInfo
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- CN105934066A CN105934066A CN201610523240.9A CN201610523240A CN105934066A CN 105934066 A CN105934066 A CN 105934066A CN 201610523240 A CN201610523240 A CN 201610523240A CN 105934066 A CN105934066 A CN 105934066A
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- 239000002245 particle Substances 0.000 title claims abstract description 58
- 238000007906 compression Methods 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims abstract 2
- 210000001331 nose Anatomy 0.000 claims description 51
- 238000002347 injection Methods 0.000 claims description 21
- 239000007924 injection Substances 0.000 claims description 21
- 230000033001 locomotion Effects 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 abstract description 10
- 230000006835 compression Effects 0.000 abstract description 3
- 238000010894 electron beam technology Methods 0.000 description 60
- 230000001133 acceleration Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005461 Bremsstrahlung Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
- H05H7/001—Arrangements for beam delivery or irradiation
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H13/00—Magnetic resonance accelerators; Cyclotrons
- H05H13/10—Accelerators comprising one or more linear accelerating sections and bending magnets or the like to return the charged particles in a trajectory parallel to the first accelerating section, e.g. microtrons or rhodotrons
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
- H05H7/12—Arrangements for varying final energy of beam
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
- H05H7/04—Magnet systems, e.g. undulators, wigglers; Energisation thereof
- H05H2007/046—Magnet systems, e.g. undulators, wigglers; Energisation thereof for beam deflection
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- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Medical Informatics (AREA)
- Optics & Photonics (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Biomedical Technology (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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- Particle Accelerators (AREA)
Abstract
The invention discloses a particle beam accelerator. The particle beam accelerator comprises a coaxial resonant cavity, a particle beam emitting device, a plurality of deflection magnets, a target component and a focusing component, wherein the peripheral surface of the coaxial resonant cavity is provided with an incident part and an emergent part; the particle beam emitting device directly faces the incident part; each deflection magnet is provided with an incoming part and an outgoing part, and the deflection magnets are arranged around the coaxial resonant cavity; the target component directly faces the emergent part; and the focusing component is positioned between the target component and the emergent part. The coaxial resonant cavity is provided with a phase compression device. The phase compression device is used for compressing the phase of a particle beam, and the energy divergence of the particle beam is reduced, so that the minimum focus size of the particle beam is reduced. Thus, a CT device with the particle accelerator can realize high spatial resolution imaging.
Description
Technical field
The present invention relates to a kind of particle beam accelerator.
Background technology
Particle beam accelerator is widely used in medicine CT device or industry CT device, is used for
Obtain high velocity beam.High velocity beam bombardment target assembly, thus produce ray, by penetrating
Line carries out imaging to object.
But existing medicine CT device or industry CT device, all there is imaging space and differentiate
The problem that rate is low.
Summary of the invention
It is an object of the invention to provide a kind of particle beam accelerator, it is filled by phase-compression
Put the energy spread reducing the particle beams, thus reduce the minimum focal spot size of the particle beams so that tool
The CT device of this particle accelerator standby is capable of high spatial resolution imaging.
Embodiments of the invention are achieved in that
A kind of particle accelerator, including: coaxial resonant cavity, the periphery mask of coaxial resonant cavity
Standby incident section and exit portion；Particle beams emitter, particle beams emitter is just to incident section；
Multiple deflection magnets, deflection magnet possesses inlet portion and injection part, multiple deflection magnets around
Coaxial resonant cavity is arranged；Target assembly, target assembly is just to exit portion；Focus pack, focusing group
Part is between target assembly and exit portion.Wherein, coaxial resonant cavity is provided with phase-compression
Device.
Inventor finds during realizing the embodiment of the present invention, the institute of existing CT device
The problem low there is imaging space resolution ratio, is owing to bombarding the particle beams on target assembly
Minimum focal spot size excessive.To this end, in the particle accelerator that the embodiment of the present invention provides,
Arranging phase-compression device, be compressed the phase place of the particle beams, the energy reducing the particle beams dissipates
Degree, thus reduce the minimum focal spot size of the particle beams.So so that possess this particle and accelerate
The CT device of device is capable of high spatial resolution imaging.
In an embodiment of the present invention, phase adjusting device is the coaxial resonance of multiple layout
Nose vertebra on chamber, nose vertebra is positioned on the movement locus of the particle beams.
In an embodiment of the present invention, nose vertebra includes that being arranged on the outer of coaxial resonant cavity leads
External nose vertebra on body, and the interior nose vertebra being arranged on the inner wire of coaxial resonant cavity.External nose
Vertebra and interior nose vertebra are coaxial, and the axis of external nose vertebra and interior nose vertebra hangs down with the axis of coaxial resonant cavity
Straight crossing.
In an embodiment of the present invention, quantity N=2*M+2 of nose vertebra.Wherein, M represents
The quantity of deflection magnet.Two nose vertebras lay respectively at incident section and exit portion；Remaining nose vertebra divides
The most not right with the inlet portion of all deflection magnets and injection part.
In an embodiment of the present invention, at the inlet portion of deflection magnet and at injection part
Edge angle is 6.8 °.
In an embodiment of the present invention, first on the movement locus of the particle beams is inclined
Turn and at the injection part of magnet, be provided with slit collimator.
In an embodiment of the present invention, the slit width of slit collimator is 10mm.
In an embodiment of the present invention, target assembly includes disc, and with disc transmission
The motor connected.
In an embodiment of the present invention, target assembly also includes the lifting dress being connected with motor
Put.
In an embodiment of the present invention, focus pack is quadrupole electromagnet set of lenses.
Technical scheme at least has the advantage that and beneficial effect:
Arranging phase-compression device on coaxial resonant cavity, phase-compression device is to the particle beams
Phase place is compressed, and reduces the energy spread of the particle beams, thus reduces the minimum focus of the particle beams
Size.So so that the CT device possessing this particle accelerator is capable of high-space resolution
Rate imaging.
Accompanying drawing explanation
For the technical scheme of the clearer explanation embodiment of the present invention, below in embodiment
The accompanying drawing used is needed to be briefly described.Should be appreciated that the following drawings illustrate only the present invention
Some embodiment, should not be construed as limiting the scope of the present invention.For this area
For technical staff, in the case of not paying creative work, it is possible to according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the structural representation of particle beam accelerator in the embodiment of the present invention；
Fig. 2 is the horizontal cross of coaxial resonant cavity in the embodiment of the present invention；
Fig. 3 is the structural representation of target assembly in the embodiment of the present invention；
Wherein, the parts title that reference is corresponding is as follows:
100-particle beam accelerator, 110-coaxial resonant cavity, 111-incident section, 112-outgoing
Portion, 113-outer conductor, 114-inner wire, 115-nose vertebra, 115-1-external nose vertebra, 115-2-
Interior nose vertebra, 120-particle beams emitter, 121-electron gun, 122-beam buncher, 123-spiral shell
Spool, 132-inlet portion, 133-injection part, 1301-the first deflection magnet, 1302-second
Deflection magnet 1302,1303-the 3rd deflection magnet, 1304-quadrupole deflector magnet, 1305-
5th deflection magnet, 1306-the 6th deflection magnet, 1307-the 7th deflection magnet, 1308-
8th deflection magnet, 1309-the 9th deflection magnet, 1310-the tenth deflection magnet, 1311-
11st deflection magnet, 1312-the 12nd deflection magnet, 140-target assembly, 141-disc,
142-motor, 143-lowering or hoisting gear, 150-focus pack, 160-slit collimator.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below will
In conjunction with accompanying drawing, the technical scheme in the embodiment of the present invention is carried out clear, complete description.
Obviously, described embodiment is a part of embodiment of the present invention rather than whole realities
Execute example.
Therefore, detailed description to embodiments of the invention is not intended to limit requirement and protects below
The scope of the present invention protected, but it is merely representative of the section Example of the present invention.Based on this
Embodiment in bright, those of ordinary skill in the art are not under making creative work premise
The every other embodiment obtained, broadly falls into the scope of protection of the invention.
It should be noted that in the case of not conflicting, the embodiment in the present invention and enforcement
Feature and technical scheme in example can be mutually combined.
It should also be noted that similar label and letter represent similar terms in following accompanying drawing, because of
This, be defined in the most a certain Xiang Yi accompanying drawing, then it is right to need not in accompanying drawing subsequently
It defines further and explains.
In describing the invention, it should be noted that term " first ", " second " etc.
It is only used for distinguishing and describes, and it is not intended that indicate or hint relative importance.
Embodiment:
It is that in the embodiment of the present invention, the structure of particle beam accelerator 100 is shown with reference to Fig. 1, Fig. 1
It is intended to.Particle beam accelerator 100 include coaxial resonant cavity 110, particle beams emitter 120,
Deflection magnet, target assembly 140 and focus pack 150.
It is the horizontal cross-sectional of coaxial resonant cavity 110 in the embodiment of the present invention with reference to Fig. 2, Fig. 2
Figure.Coaxial resonant cavity 110 includes outer conductor 113 and inner wire 114, outer conductor 113 He
Accelerating field is formed between inner wire 114.
Referring once again to Fig. 1.Particle beams emitter 120 includes electron gun 121, electron gun
121 just to incident section 111, for launching electron beam to coaxial resonant cavity 110.Deflection magnet
Quantity be 12, respectively first deflection magnet the 1301, second deflection magnet 1302,
3rd deflection magnet 1303, quadrupole deflector magnet 1304, the 5th deflection magnet 1305,
Six deflection magnet the 1306, the 7th deflection magnet the 1307, the 8th deflection magnets the 1308, the 9th
Deflection magnet the 1309, the tenth deflection magnet the 1310, the 11st deflection magnet the 1311, the tenth
Two deflection magnets 1312.From the first deflection magnet 1301 to the 12nd deflection magnet 1312,
12 deflection magnets are sequentially arranged around coaxial resonant cavity 110.Deflection magnet all possess into
Enter portion 132 and injection part 133.
Target assembly 140 is just to exit portion 112, and focus pack 150 is positioned at target assembly 140 He
Between exit portion 112.
The operation principle of particle beam accelerator 100 is as follows:
Electron beam launched by electron gun 121, arrow institute in the movement locus of electron beam such as Fig. 1
Show.Electron beam enters coaxial resonant cavity 110 from incident section 111, by coaxial resonant cavity 110
In accelerating field accelerate after from coaxial resonant cavity 110 penetrate, by the first deflection magnet
The inlet portion 132 of 1301 enters the first deflection magnet 1301.At the first deflection magnet 1301
Effect under, the direction of motion of electron beam be deflected, from the injection of the first deflection magnet 1301
Portion 133 penetrates, and enters coaxial resonant cavity 110, by the acceleration electricity in coaxial resonant cavity 110
Field second time penetrates after accelerating from coaxial resonant cavity 110.Then electron beam is successively by the 7th
Deflection magnet the 1307, second deflection magnet the 1302, the 8th deflection magnet the 1308, the 3rd is inclined
Turn magnet the 1303, the 9th deflection magnet 1309, quadrupole deflector magnet the 1304, the tenth deflection
Magnet the 1310, the 5th deflection magnet the 13075, the 11st deflection magnet the 1311, the 6th deflects
Magnet the 1306 and the 12nd deflection magnet 1312 deflects, thus iterates through coaxial resonant cavity
110.From the electron beam of the 12nd deflection magnet 1312 injection through coaxial resonant cavity 110
Electric field acceleration after, penetrate from exit portion 112.Whole process, electron beam is accelerated 20
Six times.From the electron beam of exit portion 112 injection, be made up of level Four magnet set of lenses is poly-
After burnt assembly 150 focuses on, bombardment is on target assembly 140, through bremsstrahlung, produces X
Ray.X-ray is for carrying out imaging to object.
By above-mentioned particle beam accelerator 100, electron beam is accelerated, there is electron beam
The bigger problem of phase width, cause electron beam energy spread high, and then make bombardment at target
The minimum focal spot size of the electron beam on assembly 140 is excessive.To this end, at coaxial resonant cavity 110
On phase-compression device is set, with the phase width of compression of electronic bundle, it is thus achieved that less energy dissipate
Degree.
Concrete, phase-compression device is used for changing in coaxial resonant cavity 110 local and accelerates electricity
The branch of field, thus regulate electron beam by phase width time at phase-compression device.
Phase-compression device is the conductor being arranged between outer conductor 113 and inner wire 114.Reference
Fig. 2, in the present invention, phase-compression device is for being arranged on outer conductor 113 and inner wire 114
Between 26 nose vertebras 115.Nose vertebra 115 includes being fixed on outer conductor 113 inner surface
Columnar external nose vertebra 115-1 and be fixed on inner wire 114 outer surface columnar in
Nose vertebra 115-2.External nose vertebra 115-1 and interior nose vertebra 115-2 is coaxial, external nose vertebra 115-1 and
The interior axis of nose vertebra 115-2 intersects vertically with the axis of coaxial resonant cavity 110.Nose vertebra 115
Be positioned on the movement locus of electron beam, i.e. 26 nose vertebras 115 respectively with 12 deflections
Inlet portion 132 and the injection part 133 of magnet are the most right.By regulation external nose vertebra 115-1
With the length of interior nose vertebra 115-2, from changing nose vertebra 115 local accelerating field affected journey
Degree.
Accelerating field E=E0*cos (p), wherein p is the phase place of electron beam, and E0 is peak electricity
?.As p=0, accelerating field is maximum, E=E0.Energy is directly produced at electron gun 121
For 40keV, in the case of phase width is less than the electron beam of 30 °, regulation 26 respectively
External nose vertebra 115-1 and the length of interior nose vertebra 115-2 in individual nose vertebra 115, from electron beam first
Secondary entrance coaxial resonant cavity 110 penetrates from coaxial resonant cavity 110 for the last time to electron beam,
By the 26 of electron beam accelerate moments phase place be adjusted to respectively 5 °, 5 °, 23 °,
23°、15°、15°、10°、10°、5°、5°、5°、5°、5°、5°、
5°、5°、5°、5°、5°、5°、5°、5°、5°、5°、5°、5°。
Use this structure, it is possible to the phase width of electron beam is compressed to about 10 °, thus obtains
The energy spread of ± 1% must be less than so that minimum Jiao of the bombardment particle beams on target assembly 140
Spot size diminishes.
It should be noted that for the phase guaranteeing each the acceleration moment to electron beam
Position is all adjusted, and quantity N=2*M+2 of nose vertebra 115, M represents the number of described deflection magnet
Amount.In other detailed description of the invention, those skilled in the art can also obtain according to hope
Electron beam phase width, the nose vertebra 115 of varying number is set.It addition, also need to explanation
, in the present embodiment, nose vertebra 115 includes external nose vertebra 115-1 and interior nose vertebra 115-2,
It is able to more accurately regulate the phase place of electron beam.In other detailed description of the invention,
Nose vertebra 115 can also be configured by those skilled in the art according to time situation so that it is only
Including external nose vertebra 115-1 or only include interior nose vertebra 115-2.Need it is further noted that
The shape of phase-compression device is not limited to cylindrical shape, in other detailed description of the invention, and ability
Field technique personnel can also arrange the phase-compression device of other shapes, as long as it can play
Change the effect of local accelerating field in coaxial resonant cavity 110.
In order to enable electron beam keeping good transverse focusing through deflection magnet, fall
Low electron beam is by the beam loss after deflection magnet, the inlet portion 132 to deflection magnet
It is adjusted with the edge angle of injection part 133, makes inlet portion 132 and the injection of deflection magnet
The edge angle in portion 133 is 6.8 °, so realizes electron beam equal less than the normalization of 10 μm
Root emittance.Also reduce the fluctuation of accelerating field power in coaxial resonant cavity 110 simultaneously
Impact on electron beam positional fluctuation on target assembly 140 so that coaxial resonant cavity 110
When interior accelerating field power swing is ± 0.5%, electron beam position ripple on target assembly 140
Dynamic less than ± 50 μm.It should be noted that the inlet portion 132 of deflection magnet and injection part 133
Edge angle be 6.8 ° be only examples, those skilled in the art can be in this reality
Execute on the basis of example the edge angle to deflection magnet to be adjusted, to adapt to different actual feelings
Condition.
In order to limit the phase place of electron beam further, first on the movement locus of electron beam
The injection part 133 of individual deflection magnet the first deflection magnet 1301 arranges slit collimator
160, electron beam is carried out energy collimation, thus indirectly limits the phase place of electron beam.Slit
The slit width of collimater 160 is 10mm, thus is limited in by the phase width of electron beam
Within 30 °.It should be noted that the width of slit collimator 160 is 10mm is only one
Individual example, those skilled in the art can be to slit collimator on the basis of the present embodiment
The width of 160 is adjusted, to adapt to different actual conditions.
In order to reduce the emittance of electron beam further, particle beams emitter 120 is all right
Including the beam buncher 122 of transmitting terminal and the solenoid 123 that are arranged on electron gun 121.Pack
The voltage of device 122 is 11kV, the electron beam that electron gun 121 sends after beam buncher 122,
Penetrated by solenoid 123 again.So realize the reduction of the emittance of electron beam.
In order to improve the quality of beam of electron beam, electron beam periodically launched by electron gun 121,
Only one of which electron beam in coaxial resonant cavity 110 is accelerated.So can avoid same
When axle resonator 110 accelerates multiple electron beam simultaneously, multiple electron beams mutually collide and to cause
Quality of beam deteriorates.In the present embodiment, electron gun 121 was sent out at interval of 12 rf periods
Penetrate an electron beam.
For the particle beam accelerator 100 in clearer explanation the present embodiment, below to this
The course of work of the particle beam accelerator 100 in embodiment illustrates.
Electron gun 121 is 40keV at interval of launching an energy 12 rf periods, phase place
The width electron beam less than 30 °.Electron beam is through beam buncher 122 He that overvoltage is 11kV
After solenoid 123, enter coaxial resonant cavity 110 from incident section 111, by coaxial resonant cavity
Accelerating field in 110 penetrates after accelerating from coaxial resonant cavity 110, by the first deflection
The inlet portion 132 of magnet 1301 enters the first deflection magnet 1301.At the first deflection magnet
Under the effect of 1301, the direction of motion of electron beam is deflected, from the first deflection magnet 1301
Injection part 133 penetrate, by, after slit collimator 160 that slit width is 10mm, entering
Enter coaxial resonant cavity 110.After being accelerated by the accelerating field second time in coaxial resonant cavity 110
Penetrate from coaxial resonant cavity 110.Then electron beam successively by the 7th deflection magnet 1307,
Second deflection magnet 1302, the 8th deflection magnet 1308, the 3rd deflection magnet 1303,
Nine deflection magnets 1309, quadrupole deflector magnet the 1304, the tenth deflection magnet the 1310, the 5th
Deflection magnet the 13075, the 11st deflection magnet the 1311, the 6th deflection magnet 1306 and the tenth
Two deflection magnets 1312 deflect, thus iterate through coaxial resonant cavity 110.Inclined from the 12nd
Turn magnet 1312 injection electron beam after the electric field acceleration in coaxial resonant cavity 110, from
Exit portion 112 penetrates.Coaxial resonant cavity 110 is entered for the first time to electron beam from electron beam
After once penetrate from coaxial resonant cavity 110, by the 26 of electron beam accelerate moments phases
Position by nose vertebra 115 be adjusted to respectively 5 °, 5 °, 23 °, 23 °, 15 °, 15 °, 10 °,
10°、5°、5°、5°、5°、5°、5°、5°、5°、5°、5°、5°、
5°、5°、5°、5°、5°、5°、5°.Whole process, electron beam is accelerated two
16 times, each accelerated electron beam obtains the energy of 400-700keV.From exit portion 112
The electron beam of injection, after being focused on by the focus pack 150 being made up of level Four magnet set of lenses,
Bombardment is on target assembly 140.On target assembly 140, the minimum focal spot size of electron beam half
High wide less than 0.2mm.Through bremsstrahlung, produce X-ray.X-ray is for entering object
Row imaging.So realize low energy divergence and the Low emittance of electron beam, and then realize high spatial
Resolution imaging.
It is the structural representation of target assembly 140 in the embodiment of the present invention with reference to Fig. 3, Fig. 3.
Owing to, on target assembly 140, the minimum focal spot size halfwidth of electron beam is less than 0.2mm,
The heat resistance of target assembly 140 is had higher requirement by this.To this end, at the present embodiment
In, target assembly 140 uses following structure.Target assembly 140 includes disc 141 and and disc
The motor 142 that 141 are in transmission connection.Beam bombardment is on disc 141, and motor 142 drives
Disc 141 rotates into heat loss through radiation.In order to enable electron beam all and bombardment at disc 141
On, it is also possible to the lowering or hoisting gear 143 being connected with motor 142 is set.Lowering or hoisting gear 143 carries
Dynamic lowering or hoisting gear 143 and disc 141 move up and down.In the present embodiment, disc 141
A diameter of 20～50cm, the linear velocity of disc 141 edge reaches 20-100m/s, lifting
Device 143 drives lowering or hoisting gear 143 and disc 141 to do Enhance Sports with 0.1-1mm/s,
Enhance Sports scope is 2～10cm.So, in the temperature in the beam bombardment region of disc 141
When degree reaches 400～800 DEG C, the heat radiation of disc 141 can reach 1kW, thus adapt to minimum
The focal spot size halfwidth electron beam less than 0.2mm, it is to avoid the minimum focal spot size of electron beam
Halfwidth increases owing to the heat resistance of disc 141 is not enough.
In the present embodiment, lowering or hoisting gear 143 is linear electric motors, in other specific embodiment parties
In formula, lowering or hoisting gear 143 can also use hydraulic cylinder, screw pair etc. to constitute.
The foregoing is only the section Example of the present invention, be not limited to the present invention,
To those skilled in the art, the present invention can have various modifications and variations.All at this
Within the spirit of invention and principle, any modification, equivalent substitution and improvement etc. made, all
Within protection scope of the present invention should being included in.
Claims (10)
1. a particle accelerator, it is characterised in that including:
Coaxial resonant cavity, the outer peripheral face of described coaxial resonant cavity possesses incident section and exit portion；
Particle beams emitter, described particle beams emitter is just to described incident section；
Multiple deflection magnets, described deflection magnet possesses inlet portion and injection part, multiple described
Deflection magnet is arranged around described coaxial resonant cavity；
Target assembly, described target assembly is just to described exit portion；
Focus pack, described focus pack is between described target assembly and described exit portion；
Wherein, described coaxial resonant cavity is provided with phase-compression device.
A kind of particle beam accelerator the most according to claim 1, it is characterised in that:
Described phase adjusting device is the nose vertebra on the described coaxial resonant cavity of multiple layout, described
Nose vertebra is positioned on the movement locus of the particle beams.
A kind of particle beam accelerator the most according to claim 2, it is characterised in that:
Described nose vertebra includes the external nose vertebra being arranged on the outer conductor of described coaxial resonant cavity, with
And the interior nose vertebra being arranged on the inner wire of described coaxial resonant cavity；Described external nose vertebra and described
Interior nose vertebra is coaxial, the axis of described external nose vertebra and described interior nose vertebra and described coaxial resonant cavity
Axis intersects vertically.
4. according to a kind of particle beam accelerator described in Claims 2 or 3, it is characterised in that:
Quantity N=2*M+2 of described nose vertebra；
Wherein, M represents the quantity of described deflection magnet；
Two described nose vertebras lay respectively at described incident section and described exit portion；Remaining described nose
Vertebra is the most right with the inlet portion of all described deflection magnets and injection part respectively.
A kind of particle beam accelerator the most according to claim 1, it is characterised in that:
Edge angle at the inlet portion of described deflection magnet and at injection part is 6.8 °.
A kind of particle beam accelerator, it is characterised in that:
Arrange at the injection part of first described deflection magnet on the movement locus of the particle beams
There is slit collimator.
A kind of particle beam accelerator the most according to claim 6, it is characterised in that:
The slit width of described slit collimator is 10mm.
A kind of particle beam accelerator the most according to claim 1, it is characterised in that:
Described target assembly includes disc, and the motor being in transmission connection with described disc.
A kind of particle beam accelerator the most according to claim 8, it is characterised in that:
Described target assembly also includes the lowering or hoisting gear being connected with described motor.
A kind of particle beam accelerator the most according to claim 1, it is characterised in that:
Described focus pack is quadrupole electromagnet set of lenses.
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| CN201610523240.9A CN105934066B (en) | 2016-07-01 | 2016-07-01 | A kind of particle beam accelerator |
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| CN201610523240.9A CN105934066B (en) | 2016-07-01 | 2016-07-01 | A kind of particle beam accelerator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950590A (en) * | 2017-05-08 | 2017-07-14 | 中国工程物理研究院流体物理研究所 | A kind of micron dimension conversion target assembly measured for electron beam emittance |
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| CN112888139A (en) * | 2020-12-29 | 2021-06-01 | 中国科学院近代物理研究所 | System and method for adjusting energy of electron beam at outlet of coaxial cavity accelerator |
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