CN106535459A - Accelerating tube and linear accelerator with same - Google Patents
Accelerating tube and linear accelerator with same Download PDFInfo
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- CN106535459A CN106535459A CN201611202658.6A CN201611202658A CN106535459A CN 106535459 A CN106535459 A CN 106535459A CN 201611202658 A CN201611202658 A CN 201611202658A CN 106535459 A CN106535459 A CN 106535459A
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- accelerating
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- isolation element
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- coupled cavity
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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
- H05H7/22—Details of linear accelerators, e.g. drift tubes
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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
- H05H9/00—Linear accelerators
-
- 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
- H05H7/22—Details of linear accelerators, e.g. drift tubes
- H05H2007/225—Details of linear accelerators, e.g. drift tubes coupled cavities arrangements
Abstract
The invention discloses an accelerating tube. The accelerating tube comprises a plurality of accelerating cavities, a coupling cavity, an energy adjusting element and an isolating element, wherein the coupling cavity is coupled with two adjacent accelerating cavities in the accelerating cavities through coupling ports; the energy adjusting element is coupled onto the coupling cavity so as to adjust the output energy of the accelerating tube; the isolating element is connected onto the inner wall of the coupling cavity so that the energy adjusting element is isolated from the accelerating cavities in a vacuum sealing manner, wherein the isolating element is microwave-permeable, and the isolating element is deviated from the coupling ports.
Description
Technical field
The present invention relates to field of medical device, and in particular to a kind of accelerating tube and the linear accelerator with the accelerating tube.
Background technology
Accelerating tube is the critical component of medical electronic linear accelerator, its effect be produce for clinical cancer therapy and
The high-energy ray of imaging.But in order to improve the precision of clinical cancer therapy, many medical electronic linear acceleratoies all exist at present
Development can export the medical accelerating tube of the keV level rays for imaging simultaneously.And keV level rays are generally by accelerating tube
On be provided with the switch of energy modulation function to realize, there is the accelerating tube with energy switch of keV level imaging functions at present
Typically all completed to assemble by soldering and edge seal flange etc., Varian CL2300 on sale is serial for such as existing market
Product etc..
When accelerator works, strike sparks with inside accelerating tube to prevent electronics from losing, the inside of accelerating tube and energy switch will
High vacuum state is kept, internal vacuum is an important parameter in accelerator operation.Ordinary circumstance, accelerating tube are opened with energy
Close in an atmosphere by a prolonged exhaust process will be carried out after flange connection, and accelerating tube when working Jing it is normal because of being
System air-tightness is bad or aerofluxuss thoroughly do not cause vacuum difference and cannot normal work.In addition, medical electron linear adds at present
If once the related problem of vacuum occurs in fast device, often whole accelerating tube is replaced, maintenance is which not only improves
Difficulty substantially increases the operation cost of whole accelerator simultaneously.
The content of the invention
To solve the above problems, the invention provides a kind of accelerating tube, including：Multiple accelerating cavities；Coupled cavity, its with it is described
In multiple accelerating cavities, two adjacent accelerating cavities are coupled by coupling aperture；Energy conditioning components, which is couple on the coupled cavity
To adjust the output energy of the accelerating tube；Isolation element, which is connected on the inwall of the coupled cavity to adjust the energy
Section element keep apart with the accelerating cavity vacuum-tight, wherein, the isolation element is that microwave is permeable, and it is described every
Drift out with the coupling aperture from element.
Optionally, the coupled cavity with from its inwall inward against extend two nose cones, wherein, it is described every
It is arranged between the nose cone and the coupling aperture from element.
Optionally, also include the valve with the coupled cavity gas communication, which is used for the coupled cavity evacuation.
Optionally, the coupling intracavity is filled with sulfur hexafluoride gas.
Optionally, also including cooling line, which is adjacent to the isolation element and the junction of the inwall of the coupled cavity
Arrangement, to cool down the isolation element.
Optionally, the coupled cavity defines the first space, and the isolation element connects around the energy conditioning components
It is connected on the inwall of the coupled cavity, wherein, the isolation element is limited independently of described jointly together with the coupling cavity wall
First space and the second space of the closing being sealed off against out with first space vacuum.
Optionally, the number of the isolation element is two, and is tabular, and one of them is arranged in the energy and adjusts
Adjacent to the side of the coupling aperture, another is arranged in side of the energy conditioning components away from the coupling aperture to section element.
Optionally, the isolation element is coated with the material of anti secondary electron transmitting.Specifically, the anti secondary electron
The material of transmitting includes titanium nitride, manganese monoxide or chromium oxide.More specifically, the thickness of the material of the anti secondary electron transmitting
For 10-100nm.
Optionally, the isolation element is connected on the inwall of the coupled cavity by conductive metallic material.Specifically,
The conductive metallic material includes copper, gold or silver.
According to a further aspect in the invention, a kind of linear accelerator is disclosed, which includes accelerating tube as above described in items.
According to a further aspect in the invention, a kind of accelerating tube is disclosed, including：Multiple accelerating cavities；Coupled cavity, its with it is described
In multiple accelerating cavities, two adjacent accelerating cavities are coupled by coupling aperture；Energy conditioning components, which is couple on the coupled cavity
To adjust the output energy of the accelerating tube；Isolation element, which is arranged between the energy conditioning components and the coupling aperture,
So that the coupled cavity to be located at the space of the energy conditioning components side and the sky positioned at the coupling aperture side of the coupled cavity
Between vacuum-tight keep apart, wherein, the isolation element is that microwave is permeable.Optionally, the coupling intracavity has
From its inwall inward against two nose cones for extending, wherein, the isolation element is spaced apart with the nose cone.
According to a further aspect in the invention, a kind of accelerating tube is disclosed, including：Multiple accelerating cavities；Coupled cavity, its with it is described
In multiple accelerating cavities, two adjacent accelerating cavities are coupled by coupling aperture；Energy conditioning components, which is couple on the coupled cavity
To adjust the output energy of the accelerating tube；Isolation element, which is connected on the inwall of the coupled cavity to adjust the energy
Section element keep apart with the accelerating cavity vacuum-tight, wherein, the isolation element is that microwave is permeable, and it is described every
From element, compared with the coupling aperture, its magnetic field intensity is less.Optionally, the isolation element away from the coupled cavity most
Big field strength region.
Description of the drawings
Fig. 1 is a kind of schematic diagram of the accelerating tube of embodiment of the invention；
Fig. 2 is a kind of schematic diagram of the isolation element with annular connecting part of embodiment of the invention；
Fig. 3 is a kind of schematic diagram of the accelerating tube of embodiment of the invention；
Fig. 4 is a kind of schematic diagram of the accelerating tube of embodiment of the invention；
Fig. 5 is a kind of schematic diagram of the accelerating tube of embodiment of the invention；
Fig. 6 is a kind of schematic diagram of the accelerating tube of embodiment of the invention；
Fig. 7 is a kind of schematic diagram of the accelerating tube of embodiment of the invention；And
Fig. 8 is a kind of linear accelerator of embodiment of the invention.
Specific embodiment
It is understandable to enable the above objects, features and advantages of the present invention to become apparent from, below in conjunction with the accompanying drawings to the present invention
Specific embodiment explain.
As shown in figure 1, Fig. 1 shows a kind of schematic diagram of the accelerating tube 100 of embodiment of the invention.Specifically
Ground, the accelerating tube 100 be side coupled standing wave accelerator tube, it include accelerating cavity 102,104,106,108,110, coupled cavity 112,
114th, 116,118 and energy adjustment component 120.Wherein, accelerating cavity 102,104,106,108,110 is in a longitudinal direction two-by-two
Between connected by drift tube 122.Coupled cavity 112 couples accelerating cavity 102,104, and coupled cavity 114 couples accelerating cavity 104,106,
Coupled cavity 116 couples accelerating cavity 106,108, the coupling accelerating cavity 108,110 of coupled cavity 118.Coupled cavity 112,114,116,118
Each is extended with nose cone 101,103 inward against ground from coupling cavity wall.
Energy adjustment component 120 is couple to coupled cavity 116, wherein, the energy adjustment component 120 at least includes energy adjustment
Element 124, driving element and control element.The energy conditioning components 124 can be for example rod-like element, and which is being basically perpendicular to
The direction of the longitudinal axis of accelerating tube 100 is couple to coupled cavity 116.Driving element can for example be servomotor, drive unit
Under the driving of part, preceding energy regulating element can extend in coupled cavity 116 or retract from coupled cavity 116.Control element
For example can be controller, its can with pre-stored accelerating tube 100 output energy and the energy conditioning components 124 position it
Between corresponding relation memorizer it is associated with each other, and can according to the output energy information of the accelerating tube 100 for receiving to
Driving element sends position control information.So, stretching into or retracting by energy conditioning components 124, the electric field of accelerating cavity 108
Phase place and/or amplitude can be conditioned and then can adjust the output energy of accelerating tube 100.
General in energy adjustment component 120 also to include corrugated tube (not shown), one end of the corrugated tube is close with coupled cavity 116
Envelope links together, the other end of corrugated tube be sealably coupled to preceding energy regulating element 124 outside coupled cavity 116
On one end.This partial content is will be understood by for those of ordinary skill in the art, therefore, will not be described here.
One of ordinary skill in the art will appreciate that how to adjust energy conditioning components to accelerating by the vertical direction
The output energy of pipe 100 is adjusted, for example, may refer to United States Patent (USP) US4629938, will not be described here.
The accelerating tube 100 also includes isolation element 126, and which is connected on the inwall of coupled cavity 116 and energy adjustment is first
Part 124 is kept apart with accelerating cavity 106,108 vacuum-tights.
Specifically, the isolation element 126 can be the permeable material of microwave, and here selects dielectric substance, for example, should
Dielectric substance can be ceramic material or glass material.Optionally, the dielectric substance can be the quality of beryllium oxide
The mass percent of the ceramics or aluminium oxide of percentage ratio substantially more than 98% is more than 95% ceramics, or quartzy glass
Glass, micarex or devitrified glass.In the present case, the dielectric substance has that dielectric constant is low, high-frequency loss is little, leads
Hot good, sealing is high, while having certain thermal coefficient of expansion.
In a kind of selective example, the isolation element 126 can be coated with the material of anti secondary electron transmitting；Enter
One step ground, the secondary electron yield of the material are less than 1, can for example be material based on titanium nitride (TiN) or with
Manganese monoxide (MnO) or chromium oxide (Cr2O3) based on material；Further, it is contemplated that radiating efficiency, the thickness of the material
Can be 10-100nm.In the present case, when the isolation element is in high-frequency microwave field, the anti secondary electron transmitting
Material can play inhibitory action to the secondary electron that may occur on 126 surface of isolation element.As such, it is possible to improve this every
From the breakdown characteristics of element 126.
The shape of the isolation element 126 is configured to fit each other with the shape of the inwall of coupled cavity 116.In Fig. 1
In, as the coupled cavity 116 is being general square shape on the section of paper, therefore the isolation element 126 is also substantially square
The shape of shape.
The isolation element 126 is connected to nose cone 101,103 and accelerating cavity 106,108 leads to the coupling aperture of coupled cavity 116
128th, between 130.Thus it is possible, on the one hand, the isolation element 126 is spaced apart with nose cone 101,103, away from 101,103 institute of nose cone
The relatively high electric field region at place, thus, it is possible to reduce the probability of the secondary electron generation that highfield causes；On the other hand, should
Isolation element 126 is also spaced apart with coupling aperture 128,130, away from the relatively high field region residing for coupling aperture 128,130,
Thus, it is possible to reduce flatulence of heat type rupture caused by the high frequency thermal losses caused by high-intensity magnetic field.I.e., on the whole, the isolation element 126 is received
The thermal stress for arriving can be less.
The isolation element 126 passes through the connected mode quilt of such as Welding again after generally first processing to its circumferential metalization
It is connected in the cavity wall of coupled cavity 116.126 length of isolation element can be 30-45mm, width can be 24-36mm, thickness
Can be 2-5mm.
As shown in Fig. 2 in a kind of selective example, around the periphery of the isolation element 126, annular can be welded with
Coupling part 127.The annular connecting part 127 is made up of metal material, the especially higher metal material of electrical conductance.So, one
Aspect can be connected in 116 cavity wall of coupled cavity in order to annular connecting part 127, be on the other hand easy to eliminate because introducing isolation unit
Part 126 and the impedance mismatch phenomenon in 126 both sides of isolation element (that is, coupled cavity side with accelerating cavity side) microwave transmission path.
More preferably, the material of the annular connecting part 127 and the material of 116 cavity wall of coupled cavity are identicals.Because 116 cavity wall of coupled cavity
Material be usually copper product, more specifically, be oxygenless copper material, so, the material of the annular connecting part 127 can be copper
Material, more specifically, can be oxygenless copper material.It is appreciated that the material of the annular connecting part 127 can also be golden material
Or ag material.More preferably, (that is, coupled cavity side and accelerating cavity side) microwave transmission path in order that 126 both sides of isolation element
Impedance mismatch phenomenon is preferably eliminated, and (that is, the neighboring of isolation element 126 is to coupling for the thickness of the annular connecting part 127
The distance of 116 cavity wall of chamber) can be less than or equal to 1mm more than 0 less than or equal to 2mm or more than 0；More preferably, the annular connects
The thickness of the long side around the isolation element 126 of part 127 is more than 0 less than or equal to 1mm, around the isolation element 126
Short brink thickness be more than 0 be less than or equal to 2mm.A kind of isolation element for being surrounded with Ring connecting elements 127 is shown in Fig. 2
126 example, they on the whole length dimension can be 30-45mm, width dimensions can be 24-36mm, vertical direction thickness
Can be 2-5mm.It is appreciated that the isolation element can not be square, thickness may not be uniformly.
In a kind of preferably example, sulfur hexafluoride (SF can be filled with coupled cavity 1166) gas, further to drop
Low sparking risk.
With reference to described previously, as coupled cavity 116 has coupled energy conditioning components 124 and corrugated tube, if not adopting front
Isolation element is stated, these moving components can cause to accelerate intraluminal vacuum keep stable for a long time.Therefore, Jing Guochang
The use of phase, the vacuum of the intracavity of whole accelerating tube can worse and worse, and ultimately resulting in accelerating tube cannot be continuing with.By
In accelerating tube 100 arrange isolation element 126, can by the environment in accelerating cavity 106,108 be provided with energy conditioning components 124
Coupled cavity 116 be environmentally isolated out.When so, in order to prepare to carry out high-temperature baking aerofluxuss using the accelerating tube 100, aerofluxuss
The spent time greatly reduces；In addition, after having used for a long time, due to there is isolation element 126, even if coupled cavity
Vacuum in 116 is slightly deteriorated, but the accelerating cavity 106,108 can still keep high vacuum, therefore, it can be lifted
The service life of accelerating tube 100.
As shown in figure 3, Fig. 3 schematically shows the schematic diagram of another kind of accelerating tube 200.Accelerating tube 200 shown in Fig. 3
Distinguish with the accelerating tube 100 of Fig. 1 and be：The accelerating tube 200 also includes cooling line 202, the 202 neighbouring isolation unit of cooling line
The junction arrangement of the inwall of part 204 and coupled cavity 206.The cooling line 202 can cool down isolation element 204, thus enter one
Step reduces the risk that isolation element 204 is heated inequality under the thermal losses of microwave high power and is ruptured.Moreover, it is also possible to reduce by
Expand with heat and contract with cold between 206 cavity wall of isolation element 204 and coupled cavity caused displacement.
As shown in figure 4, Fig. 4 schematically shows the schematic diagram of another kind of accelerating tube 300.The accelerating tube 300 have plus
Fast chamber 302,304 and the coupled cavity 306 coupled with the accelerating cavity 302,304, by drift wherein between accelerating cavity 302,304
Pipe 308 is connected, and coupling aperture 310,312 is defined between accelerating cavity 302,304 and coupled cavity 306.Have in the coupled cavity 306
Nose cone 314 and the rod-like element 316 relative with nose cone 314.The rod-like element 316 instead of former downstream nose cone and be used as energy
Energy conditioning components in adjusting part.Drive component (for example, servomotor) is controlled by the control element of such as controller
To drive stretching into or retracting for the rod-like element 316, so as to change the electric field phase and/or amplitude of accelerating cavity 304, thus change
The output energy of accelerating tube 300.One of ordinary skill in the art will appreciate that how to be adjusted by adjusting energy in the horizontal direction
Section element is adjusted to the output energy of accelerating tube 300, for example, may refer to United States Patent (USP) US4286192, and here is not superfluous
State.
Specifically, isolation element 318 is arranged in nose cone 314 or rod-like element 316 leads to coupled cavity with accelerating cavity 302,304
Between 306 coupling aperture 310,312.
As shown in figure 5, Fig. 5 schematically shows the schematic diagram of another kind of accelerating tube 400.The accelerating tube 400 is with Fig. 4's
300 difference of accelerating tube is：The coupled cavity 402 of the accelerating tube 400 has been also coupled to valve 404, specifically, the valve 404
For vacuum valve, more specifically, the vacuum valve is angle valve.Due to there is valve 404, therefore, on the one hand, should add use is prepared
Fast pipe 400 and to accelerating tube 400 toast aerofluxuss when, energy adjustment component can be disassembled (in other words, after baking terminates
Energy adjustment component is installed again), so, energy switch component is it is avoided that the damage wind brought because being exposed to high-temperature baking environment
Danger；On the other hand, during life-time service, if running into the occasion for needing to change energy adjustment component, can be to coupled cavity 402
Independent evacuation.
As shown in fig. 6, Fig. 6 schematically shows the schematic diagram of another kind of accelerating tube 500.The accelerating tube 500 includes adding
Fast chamber 502,504,506,508,510,512,514, coupled cavity 516,518,520,522,524,526 and energy adjustment component
528.Wherein, accelerating cavity is connected by drift tube 530 in a longitudinal direction between any two.Two neighbouring upstream and downstream accelerating cavity difference
Coupled by coupled cavity, wherein, accelerating cavity 508 is coupled with coupled cavity 522 by coupling aperture 507, and coupled cavity 522 passes through coupling aperture
509 are coupled with accelerating cavity 510.Each inwall from respective coupled cavity of coupled cavity 516,518,520,524,526 is inside
Nose cone 501,503 is extended with relatively.Energy adjustment component 528 is couple on coupled cavity 522, that replaces conventional nose cone.
Specifically, the energy adjustment component 528 includes the first rod-like element 532 positioned opposite and the second rod-like element 534,
They are used as energy conditioning components.Corrugated tube 536,538 is respectively coupled in the first rod-like element 532 and the second rod-like element 534.
With as described before similarly, one end of the corrugated tube 536 is tightly connected with 522 cavity wall of coupled cavity, the other end and the first rod-like element
532 one end outside coupled cavity 522 is tightly connected, and one end and 522 cavity wall of coupled cavity of corrugated tube 538 are tightly connected,
The other end is tightly connected with one end outside coupled cavity 522 of the second rod-like element 534.First rod-like element 532 is further defined by
There is through hole 540, the through hole 540 is coupled with valve (not shown), wherein the valve is vacuum valve, specifically, the vacuum valve
For angle valve.
Under the control of control element (such as, controller), driving element (such as, servomotor) can drive respectively
One rod-like element 532 and the second rod-like element 534 are so as to change the electric field phase and/or amplitude of accelerating cavity 510, thus can change and add
The output energy of fast pipe 500.With regard to how to adjust first rod-like element 532 and the second rod-like element 534 to change accelerating tube 500
Output energy, for example, may refer to Chinese invention patent application and disclose the content of CN105517316A understood, here, no longer
Repeat.
Accelerating tube 500 also includes isolation element 542, and which is made up of the permeable material of microwave, in a kind of example, the material
Expect for dielectric substance, the dielectric substance can be ceramic material or glass material.With regard to the isolation element 542 other must
Want or selectional feature can be understood according to the description relevant with accelerating tube 100.
The isolation element 542 can be tubular, more specifically, can be square tube shape or columnar.The tubular every
Coupling is arranged into around rod-like element in the way of the first rod-like element 532 and the second rod-like element 534 to be accommodated in the inner from element 542
In chamber 522, and two ends are connected in the cavity wall of coupled cavity 522 by the connected mode of such as Welding.So, in coupling
In the space S 1 that chamber 522 limits, isolation element 542 and 522 cavity wall of coupled cavity collectively define the first rod-like element 532 of receiving, the
At least one of space S 2 of two rod-like elements 534, the space S 2 are independently opened with space S 1, and space S 2 and 1 vacuum of space S
It is sealed off against out.It will be understood by those skilled in the art that for the energy conditioning components of some other forms, energy is adjusted
Section element can be to be contained wholly within space S 2.
Optionally, the isolation element 542 is tabular, and which is configured to the shape for adapting to coupled cavity 522, and number is
Two.They are respectively disposed at the both sides of energy conditioning components, i.e. respectively by the connected mode of such as Welding in energy
The side of amount regulating element local coupling mouth 507,509 be connected in cavity wall and energy conditioning components away from coupling aperture 507,
509 side is connected in cavity wall, and so, two boards shape isolation element 542 and 522 cavity wall of coupled cavity define one solely jointly
Vertical space.
The isolation element 542 can be coated with the material of anti-Secondary Emission, with regard to the necessary and/or selectivity of the material
Feature can be understood according to the description relevant with accelerating tube 100.
With regard to the isolation element 542, with the connected mode of the coupled cavity 522 and its in selectivity embodiment, this isolates unit
542 periphery of part is provided with the situation such as annular connecting part and respective size, can be carried out according to the description relevant with accelerating tube 100
Understand.
542 one side of isolation element is spaced apart with the first rod-like element 532, the second rod-like element 534, shaft-like away from first
Relatively high electric field region residing for part 532, the second rod-like element 534, thus, it is possible to reduce the secondary electron that highfield causes
Raw probability；On the other hand, the isolation element 542 is also spaced apart with coupling aperture 507,509, away from 507,509 institute of coupling aperture
The relatively high field region at place, thus, it is possible to reduce flatulence of heat type rupture caused by the high frequency thermal losses caused by high-intensity magnetic field.
It is similar with previous embodiment, near the link position of the isolation element 542 with the coupled cavity 522, can be with
Cooling line is set, and to cool down to isolation element 542, this can further reduce isolation element 542 in microwave high power
Thermal losses under be heated inequality and the risk that ruptures.Moreover, it is also possible to reduce due to isolation element 542 and 522 cavity wall of coupled cavity
Between expand with heat and contract with cold caused displacement.
With previous embodiment similarly, in order to reduce risk of striking sparks, sulfur hexafluoride can be filled with coupled cavity 522
(SF6) gas.
As shown in fig. 7, Fig. 7 schematically shows the schematic diagram of another kind of accelerating tube 600.Specifically, the accelerating tube 600
Including adjacent two accelerating cavity 602,604, and coupled by coupling aperture 606,608 with aforementioned accelerating cavity 602,604 respectively
Coupled cavity 610.In coupled cavity 610, nose cone 612 has inwardly been protruded out from the cavity wall of coupled cavity 610, with the nose cone 612 relatively,
Rod-like element 614 is additionally provided with, here, energy conditioning components of the rod-like element 614 as energy adjustment component, which is in control element
Can drive to move towards nose cone 612 or retract away from nose cone 612 with driven element under control, thus change accelerating cavity
604 electric field phase and/or amplitude, and then change the output energy of accelerating tube 600.Further, the accelerating tube 600 also includes
Isolation element 616, which is generally tubular, and its one end closing other end is opened, side of its open end by such as Welding
Formula is connected in cavity wall with by being partially accommodated in which in coupled cavity 610 of rod-like element 614.Thus, define and coupling
Close the 1 second space S2 that is mutually independent and being spaced apart with 1 vacuum-tight of the first space S of the first space S in chamber 610.
Other features of the accelerating tube 600 of the embodiment may be referred to other previous embodiments and be understood, here, no longer
Repeat.
As illustrated, compared with aforementioned accelerating tube 100,200,300,400,500, a part of Jing of its isolation element 616
The region (that is, the region passed through by the central longitudinal axis of coupled cavity 610) of maximum field intensity in coupled cavity 610 has been crossed, because
And, in terms of the probability of the secondary electron generation that highfield causes is reduced, may be good not as foregoing embodiments.Even so,
As the isolation element 616 is spaced apart with coupling aperture 606,608, away from the relatively high magnetic field residing for coupling aperture 608,610
Region, thus, it is possible to reduce flatulence of heat type rupture caused by the high frequency thermal losses caused by high-intensity magnetic field.
Fig. 8 schematically shows a kind of linear accelerator 700 of embodiment of the invention, the accelerator 700
Including accelerating tube 702, wherein, the accelerating tube 702 can be using any one in the accelerating tube in foregoing embodiment.More
Specifically, the linear accelerator 700 is clinac.
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art, without departing from this
In the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
The scope of restriction is defined.
Claims (17)
1. a kind of accelerating tube, including：
Multiple accelerating cavities；
Coupled cavity, which is coupled by coupling aperture with two adjacent accelerating cavities in the plurality of accelerating cavity；
Energy conditioning components, which is couple on the coupled cavity to adjust the output energy of the accelerating tube；
Isolation element, which is connected on the inwall of the coupled cavity with will be the energy conditioning components close with the accelerating cavity vacuum
Feud keeps apart, wherein, the isolation element is that microwave is permeable, and the isolation element is deviateed with the coupling aperture
Open.
2. accelerating tube according to claim 1, wherein, the coupled cavity with from its inwall inward against extending
Two nose cones, wherein, the isolation element is arranged between the nose cone and the coupling aperture.
3. accelerating tube according to claim 1, wherein, also including the valve with the coupled cavity gas communication, which is used for
To the coupled cavity evacuation.
4. accelerating tube according to claim 1, wherein, the coupling intracavity is filled with sulfur hexafluoride gas.
5. accelerating tube according to claim 1, wherein, also including cooling line, which is adjacent to the isolation element and described
The junction arrangement of the inwall of coupled cavity, to cool down the isolation element.
6. accelerating tube according to claim 1, wherein, the coupled cavity defines the first space, and the isolation element is enclosed
It is connected on the inwall of the coupled cavity around the energy conditioning components, wherein, the isolation element is together with the coupling intracavity
Wall limits the second space of the closing being sealed off against out independently of first space and with first space vacuum jointly.
7. accelerating tube according to claim 1, wherein, the number of the isolation element is two, and is tabular, wherein
One is arranged in the energy conditioning components adjacent to the side of the coupling aperture, and it is remote that another is arranged in the energy conditioning components
From the side of the coupling aperture.
8. accelerating tube according to claim 1, wherein, the isolation element is coated with the material of anti secondary electron transmitting.
9. accelerating tube according to claim 8, wherein, the material of the anti secondary electron transmitting includes titanium nitride, an oxygen
Change manganese or chromium oxide.
10. accelerating tube according to claim 9, wherein, the thickness of the material of the anti secondary electron transmitting is 10-
100nm。
11. accelerating tubes according to claim 1, wherein, the isolation element is connected to described by conductive metallic material
On the inwall of coupled cavity.
12. accelerating tubes according to claim 11, wherein, the conductive metallic material includes copper, gold or silver.
A kind of 13. linear acceleratoies, which includes the accelerating tube as described in any one of claim 1-12.
A kind of 14. accelerating tubes, including：
Multiple accelerating cavities；
Coupled cavity, which is coupled by coupling aperture with two adjacent accelerating cavities in the plurality of accelerating cavity；
Energy conditioning components, which is couple on the coupled cavity to adjust the output energy of the accelerating tube；
Isolation element, which is arranged between the energy conditioning components and the coupling aperture, the coupled cavity is located at described
The space of energy conditioning components side is sealed off against out with the space vacuum positioned at the coupling aperture side of the coupled cavity, its
In, the isolation element is that microwave is permeable.
15. accelerating tubes according to claim 14, wherein, it is described coupling intracavity with from its inwall inward against extension
Into two nose cones, wherein, the isolation element is spaced apart with the nose cone.
A kind of 16. accelerating tubes, including：
Multiple accelerating cavities；
Coupled cavity, which is coupled by coupling aperture with two adjacent accelerating cavities in the plurality of accelerating cavity；
Energy conditioning components, which is couple on the coupled cavity to adjust the output energy of the accelerating tube；
Isolation element, which is connected on the inwall of the coupled cavity with will be the energy conditioning components close with the accelerating cavity vacuum
Feud keeps apart, wherein, the isolation element is that microwave is permeable, and the isolation element compared with the coupling aperture its
Magnetic field intensity is less.
17. accelerating tubes according to claim 16, wherein, the isolation element is strong away from the maximum field of the coupled cavity
Degree region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611202658.6A CN106535459B (en) | 2016-12-23 | 2016-12-23 | Accelerating tube and linear accelerator with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611202658.6A CN106535459B (en) | 2016-12-23 | 2016-12-23 | Accelerating tube and linear accelerator with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106535459A true CN106535459A (en) | 2017-03-22 |
| CN106535459B CN106535459B (en) | 2019-12-20 |
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| CN201611202658.6A Active CN106535459B (en) | 2016-12-23 | 2016-12-23 | Accelerating tube and linear accelerator with same |
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| CN113597082A (en) * | 2021-08-12 | 2021-11-02 | 中国原子能科学研究院 | Standing wave accelerating tube and radiation equipment |
| GB2599907A (en) * | 2020-10-13 | 2022-04-20 | Elekta ltd | Waveguide for a linear accelerator and method of operating a linear accelerator |
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| CN113597082B (en) * | 2021-08-12 | 2022-04-08 | 中国原子能科学研究院 | Standing wave accelerating tube and radiation equipment |
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| CN106535459B (en) | 2019-12-20 |
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