CN114531782A - Beam position and current intensity measuring device for radiation area - Google Patents
Beam position and current intensity measuring device for radiation area Download PDFInfo
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- CN114531782A CN114531782A CN202210151150.7A CN202210151150A CN114531782A CN 114531782 A CN114531782 A CN 114531782A CN 202210151150 A CN202210151150 A CN 202210151150A CN 114531782 A CN114531782 A CN 114531782A
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- 230000005855 radiation Effects 0.000 title claims abstract description 30
- 239000000523 sample Substances 0.000 claims abstract description 49
- 230000005540 biological transmission Effects 0.000 claims abstract description 44
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- 230000002285 radioactive effect Effects 0.000 claims abstract description 7
- 150000002500 ions Chemical class 0.000 claims abstract description 6
- 230000032258 transport Effects 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 69
- 229910052742 iron Inorganic materials 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 28
- 239000002184 metal Substances 0.000 claims description 27
- 229910052751 metal Inorganic materials 0.000 claims description 27
- 239000012528 membrane Substances 0.000 claims description 17
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 230000033001 locomotion Effects 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims 2
- 238000002474 experimental method Methods 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010884 ion-beam technique Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 235000000396 iron Nutrition 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 208000021727 Hantavirus hemorrhagic fever with renal syndrome Diseases 0.000 description 1
- 208000032982 Hemorrhagic Fever with Renal Syndrome Diseases 0.000 description 1
- 230000003471 anti-radiation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/48—Automatic control of crane drives for producing a single or repeated working cycle; Programme control
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/29—Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Particle Accelerators (AREA)
Abstract
The invention relates to a beam position and current intensity measuring device for a radiation area, which comprises: a shielding guide assembly for blocking radioactive ions and protecting a device externally placed in the vicinity of the apparatus; the lifting appliance is arranged at the top of the shielding guide assembly, and a crown block lifts and transports the device through the lifting appliance; the target head and transmission assembly is arranged at the top of the shielding guide assembly and positioned in the middle of the lifting appliance and used for driving the target head assembly and the current intensity probe to act. The accelerator has the advantages of simple and reliable structure, stronger radiation resistance, convenient hoisting and replacement and capability of effectively ensuring the normal operation of the accelerator. The invention can be widely applied to the technical field of accelerators.
Description
Technical Field
The invention relates to the technical field of accelerators, in particular to a beam position and current intensity measuring device for an accelerator strong radiation area.
Background
In high-flux heavy ion accelerator devices (HIAFs), a radioactive secondary beam splitter (HFRS) is used to target a high-energy high-flux heavy ion beam to produce a secondary beam. In the case of beam targeting experiments, a large part of the beam is lost at this position, and therefore the region has high emission characteristics. And simultaneously, the position and the current intensity of the target beam current are required to be measured. The super-strong radioactivity on the secondary beam can cause damage to motors and electronic elements of the measuring equipment, and frequent overhaul and replacement are needed.
On the spot of the radioactive beam line of the accelerator, the operator can not enter the strong radiation environment to maintain and replace the equipment for a long time after the shutdown, the cooling is needed for many days, and the radiation dose is reduced to the safe range so that the operator can enter the field. This can cause the accelerator to operate abnormally inefficiently. The radiation-resistant device capable of being used for measuring the beam position and the beam intensity is designed, and the radiation area equipment is guaranteed to operate more stably and reliably, so that the radiation-resistant device has great significance. Therefore, it is highly desirable to design a beam position and flow intensity measuring device that can be used in a strong radiation environment.
Disclosure of Invention
In view of the above problems, the present invention provides a beam position and current intensity measuring device for an accelerator strong radiation area, which has a simple and reliable structure, is more radiation-resistant, is convenient to hoist and replace, and can effectively ensure the normal operation of the accelerator.
In order to achieve the purpose, the invention adopts the following technical scheme: a beam position and intensity measurement device for a radiation zone, comprising: a shielding guide assembly for blocking radioactive ions and protecting devices externally placed in proximity to the apparatus; the lifting appliance is arranged at the top of the shielding guide assembly, and the overhead travelling crane lifts and transports the device through the lifting appliance; the target head and transmission assembly is arranged at the top of the shielding guide assembly and positioned in the middle of the lifting appliance and used for driving the target head assembly and the current intensity probe to act.
Further, the vacuum chamber is also included; the crown block hoists the device into the vacuum cavity through the hoisting tool; the device is characterized in that flange interfaces are respectively arranged on two sides of the vacuum cavity and are connected with an accelerator beam pipeline through the flange interfaces, and the device and the flange interfaces are sealed in a self-weight compression mode.
Furthermore, the hanger and the shielding guide assembly, and the target head and the transmission assembly and the shielding guide assembly are fixedly and hermetically connected by sealing flanges.
Furthermore, the target head and transmission assembly comprises a linear driving structure, a sealing flange, a camera head and camera head shielding iron, a transmission rod guide, a target head assembly and a current intensity probe; the linear driving structure, the camera and the camera shielding iron are fixed on the shielding guide assembly through the sealing flange; the linear driving structure is connected with the first end of the transmission rod and drives the transmission rod to act; the second end of the transmission rod penetrates through an inner hole of the shielding guide assembly and is connected with the target head assembly and the flow intensity probe; the driving rod guide is arranged on the driving rod and close to the second end of the driving rod, and is used for providing support guide for the driving rod and ensuring the positions of the target head assembly and the flow intensity probe.
Further, the linear driving structure comprises a lead screw guide rail module, a vacuum corrugated pipe, a displacement sensor and a motor; the transmission rod penetrates through the corrugated pipe and is connected with one end of the corrugated pipe; the other end of the corrugated pipe is fixedly connected with a sliding block in the lead screw guide rail module, and the motor drives the sliding block in the lead screw guide rail module to linearly move along a guide rail, so that the corrugated pipe is driven to perform compression and extension movement, and the transmission rod, the target head assembly and the flow intensity probe are driven to move up and down; the displacement sensor is arranged on the lead screw guide rail module and used for monitoring the movement of the corrugated pipe.
Further, a vacuum observation window is arranged on the sealing flange and used for realizing the observation of the camera on the inner target; the upper end of the sealing flange is provided with a flange connecting interface, and the corrugated pipe in the linear driving structure is connected to the sealing flange in a sealing mode through the flange connecting interface.
Further, the camera and the camera shielding iron are arranged at the upper end of the sealing flange; the camera and the camera shielding iron comprise a camera and a camera shielding iron; the camera is arranged inside the camera shielding iron and is aligned with the vacuum observation window on the sealing flange.
Further, the target head assembly is fixed at the second end of the transmission rod through a connecting piece, and the target head assembly and the beam direction are arranged at an angle of 45 degrees; the target head assembly consists of a fixed support and alumina ceramics, and the fixed support is in a transparent circular ring form.
Further, the flow intensity probe comprises a probe bracket, a shielding cylinder assembly and an inner membrane ring assembly; the top of the probe bracket is connected with the second end of the transmission rod; the shielding cylinder assembly is of an annular structure, is arranged in the probe bracket and is used for shielding internal signals; the inner membrane ring assembly comprises three layers of metal membrane frames and insulating support rods; the three layers of metal film frames are arranged at equal intervals, and the adjacent metal film frames are mutually isolated and connected through the insulating support rod; each metal film frame consists of a support ring and a compression ring, and the contact surface has inclination; a metal film is clamped between the support ring and the compression ring, and the metal film is flattened and compressed through an inclination structure.
And the protection frame is arranged at the foremost end of the shielding guide assembly and used for protecting the target head assembly at the front end and the current intensity probe during hoisting.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the device can measure the position and the current intensity of the high-energy strong current beam according to the experiment requirement, so as to ensure the smooth operation of the target practice experiment, the device is provided with the shielding iron and the hoisting guide, the shielding iron can effectively reduce the damage of radiation to external electrical elements, and the service life is prolonged; the hoisting guide meets the requirement of remote automatic hoisting of the crown block, greatly improves the working efficiency and reduces the running cost of the accelerator.
2. The device provided by the invention is provided with shielding iron and hoisting guide, and the external drive is an anti-radiation all-metal drive mechanism, so that the shielding iron can effectively ensure external electrical elements in a strong radiation area, the service life is prolonged, and the hoisting guide meets the requirement of remote automatic hoisting of elements by a crown block.
3. The target head adopted by the device is the ultrathin alumina ceramic, the high-energy intense beam can emit light when passing through the target head so as to monitor the beam position, and the power deposited on the target head is little so as not to cause the damage of the target head.
4. The current intensity probe adopted by the device adopts a three-layer membrane structure, the metal membrane generates secondary electrons when a beam passes through so as to monitor the beam current intensity, the high-energy high-current ion beam cannot damage the probe when passing through the membrane, and the probe has a simple and reliable structure and does not have other electronic elements.
In conclusion, the automatic hoisting device can meet the requirement of automatic hoisting, and can monitor the beam current intensity and the position before the beam current on the secondary beam current is targeted; the device has the characteristics of simple structure, convenience in use, high reliability, high working efficiency and low cost, and can provide reliable service for accelerator beam experiments and machine protection.
Drawings
Fig. 1 is a general schematic diagram of a beam position and current intensity measuring device for a radiation area of a high current accelerator according to an embodiment of the present invention;
fig. 2 is a schematic view illustrating a beam position and a beam intensity measurement device for a radiation area of a high current accelerator according to an embodiment of the present invention;
fig. 3 is a structural diagram of a transmission mechanism of the beam position and current intensity measuring device for the radiation area of the high current accelerator, which is provided by the embodiment of the present invention, except for a shielding iron and a hanger;
fig. 4 is a schematic view illustrating installation of a camera of a beam position and intensity measuring device for an irradiation area of a high-current accelerator according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a beam position and intensity probe of an intensity measuring device for an irradiation area of an high-intensity accelerator according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a beam position and intensity measuring probe of an intensity measuring device for an irradiation area of an high-intensity accelerator according to an embodiment of the present invention;
fig. 7 is a schematic view of a beam position and current intensity measuring apparatus of a current intensity probe film frame ring for a radiation area of a high current accelerator according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The invention discloses a beam position and current intensity measuring device for a radiation area of a high current accelerator, which comprises a shielding iron guide assembly, a lifting appliance, a target head, a transmission assembly, a protective frame and the like; the shielding iron can effectively reduce the damage of radiation to external electrical elements and prolong the service life. The shielding iron is composed of a plurality of strip blocks, and guide balls are arranged on two sides of the shielding iron, so that automatic hoisting of the beam position and current intensity measuring device can be realized; the lifting appliance is arranged at the top of the device and is connected with the sealing flange; the target head and the transmission assembly comprise a linear driving assembly, a sealing flange, a camera, shielding iron, a transmission rod, transmission rod guiding, a target head assembly, a flow intensity probe and the like. The linear driving assembly comprises a lead screw guide rail module, a vacuum corrugated pipe, a displacement sensor, a motor and the like. The transmission rod penetrates through the corrugated pipe, is connected with the tail of the corrugated pipe, and penetrates through the inner hole of the shielding iron to be connected with the inner target head and the flow intensity probe. The vacuum bellows component is driven to do linear telescopic motion through the linear driving component so as to drive the transmission rod and the target head to move up and down; the target head component is arranged at an angle of 45 degrees and consists of a fixed support and alumina ceramic with the thickness of 0.2-03 mm. The flow intensity probe includes a probe holder, a shield cartridge assembly, and an inner membrane ring assembly. The device monitors the position and the flow intensity of the strong flow beam through the target head and the flow intensity probe, and has the functions of on-line testing and off-line testing.
In an embodiment of the present invention, as shown in fig. 1, there is provided a beam position and intensity measuring apparatus for an accelerator strong radiation region, in this embodiment, the apparatus includes:
a shielding guide assembly 1 for blocking radioactive ions and protecting devices externally placed near the apparatus;
the lifting appliance 2 is arranged at the top of the shielding guide component 1, and the overhead travelling crane lifts and transports the device through the lifting appliance 2;
and the target head and transmission assembly 3 is arranged at the top of the shielding guide assembly 1, is positioned in the middle of the lifting appliance 2 and is used for driving the target head assembly 36 and the current intensity probe 37 to act.
In the above embodiment, as shown in fig. 2, the apparatus in this embodiment further includes a vacuum chamber 5. The crown block hoists the beam position current intensity device into the vacuum cavity body 5 through the hoisting tool 2; the installation of the accelerator beam is fixed. The two sides of the vacuum cavity 5 are respectively provided with a flange interface 51, the flange interface 51 is connected with an accelerator beam pipeline, and the device and the flange interface 51 are sealed in a dead weight compression mode. In this embodiment, a set of independent beam position current intensity measuring device may be installed in the vacuum cavity 5.
In the above embodiment, the shielding guide assembly 1 is composed of a plurality of shielding irons, and the shielding irons block radioactive ions, so that a motor, an electronic and electrical element and the like which are externally placed near the equipment are effectively protected, and the service life of the equipment is prolonged; the two sides of the shielding guide assembly 1 are provided with guide balls, and automatic hoisting of the blocking element is realized through matching with a guide groove in the vacuum cavity 5.
In this embodiment, the specific structure of the guide ball is disclosed in the document with patent application No. 202011155076.3, and is not described herein.
In the above embodiment, the hanger 2 and the shielding guide assembly 1, and the target head and the transmission assembly 3 and the shielding guide assembly 1 are all fixedly and hermetically connected by the sealing flange 32.
In the above embodiment, as shown in fig. 3, the target and transmission assembly 3 includes a linear driving structure 31, a sealing flange 32, a camera and camera shielding iron 33, a transmission rod 34, a transmission rod guide 35, a target assembly 36 and a flow intensity probe 37.
The linear driving structure 31, the camera and the camera shielding iron 33 are hermetically fixed on the shielding guide assembly 1 through a sealing flange 32;
the linear driving structure 31 is connected with a first end of the transmission rod 34 to drive the transmission rod 34 to move;
the second end of the transmission rod 34 passes through the inner hole of the shielding guide assembly 1 and is connected with the target head assembly 36 and the flow intensity probe 37;
a drive link guide 35 is provided on the shield iron assembly 1 near the second end of the drive link 34 for providing a support guide for the drive link 34 and ensuring the position of the target head assembly 36 and the flow intensity probe 37.
In the above embodiment, the linear driving structure 31 includes the lead screw guide module 311, the bellows 312, the displacement sensor 313, the motor 314, and the like.
The transmission rod 34 is arranged in the corrugated pipe 312 in a penetrating way and is connected with one end of the corrugated pipe 312;
the other end of the corrugated pipe 312 is fixedly connected with a sliding block in the lead screw guide rail module 311, the motor 314 drives the sliding block in the lead screw guide rail module 311 to linearly move along the guide rail, and further drives the corrugated pipe 312 to perform compression and extension movement so as to drive the transmission rod 34 to move up and down together with the target head assembly 36 and the flow intensity probe 37, so that the online and offline functions of the target head are realized, and the target head returns to an offline position when measurement is not needed;
the displacement sensor 313 is disposed on the lead screw guide module 311 for monitoring the movement of the bellows 312.
In this embodiment, the lead screw module 311 is made of metal, so as to effectively prevent radiation damage.
In the above embodiment, the sealing flange 32 is provided with the vacuum observation window 321 for realizing the observation of the camera on the inner target;
the upper end of the sealing flange 32 is provided with a flange connection interface, and the corrugated pipe 312 in the linear driving structure 31 is hermetically connected to the sealing flange 32 through the flange connection interface.
In the above embodiment, as shown in fig. 4, the camera and the camera shielding iron 33 are disposed at the upper end of the sealing flange 32; the camera and camera shielding iron 33 comprises a camera 331 and a camera shielding iron 332; the camera 331 is disposed inside the camera shield iron 332 and aligned with the vacuum viewing window 321 on the sealing flange 32. The camera 331 is a common small-sized camera, and the service life of the camera 331 can be effectively prolonged through the double-layer protection of the lower guide shielding iron and the camera shielding iron 332.
In the above embodiment, the target head assembly 36 is fixed at the second end of the transmission rod 34 through a connecting piece, the target head assembly 36 is arranged at 45 degrees to the beam direction, when the beam passes through the target head, the beam spot shape can be observed by the camera vertically arranged from the upper side, so that the position and the shape of the beam can be confirmed;
the target head assembly 36 is composed of a fixing bracket and alumina ceramics, and the fixing bracket is in a through ring shape. Preferably, the fixed support is a metal fixed support, and the thickness of the alumina ceramic is 0.2-03 mm. When the fixing support is used, the fixing support is in a penetrating annular form, and blocking of beam current by the metal fixing support can be avoided.
The target is ultrathin alumina ceramic, the high-energy high-intensity beam can emit light when passing through the target so as to monitor the beam position, and the power deposited on the target rarely causes the damage of the target.
In the above embodiment, as shown in fig. 5 to 7, the flow intensity probe 37 includes a probe holder 371, a shield cartridge assembly 372, and an inner membrane ring assembly 373. Wherein:
the top of the probe bracket 371 is connected with the second end of the transmission rod 34;
the shielding cylinder assembly 372 is of an annular structure, is arranged in the probe bracket 371 and is used for shielding internal signals;
the inner membrane ring assembly 373 includes a three-layer metal membrane frame 374 and an insulating support rod 375; the three layers of metal film frames 374 are arranged at equal intervals, and the adjacent metal film frames 374 are isolated and connected with each other through an insulating support rod 375;
each metal film frame 374 consists of a support ring and a compression ring, and the contact surface has a preset inclination; a thin metal film is clamped between the support ring and the compression ring, and the metal film is flattened and compressed through an inclination structure.
Wherein a shielding cover is arranged in the shielding cylinder assembly 372; the shielding cover adopts an annular structure to ensure the effective drift diameter of beam current under the normal condition.
When the current intensity probe 37 is used, a three-layer membrane structure is adopted, secondary electrons are generated when a beam passes through a metal membrane so as to monitor the beam current intensity, the metal membranes on the two sides are used for applying high voltage to inhibit the escape of the secondary electrons, and the metal membrane in the middle is used for collecting secondary electron signals so as to determine the beam current intensity; when the high-energy high-current ion beam passes through the thin metal film, little energy is lost, little heat is generated, the probe cannot be damaged, and the probe is simple and reliable in structure.
In the above embodiment, the apparatus of the present invention further includes a protection bracket 4 disposed at the foremost end of the shielding guide assembly 1, and the target head assembly 36 and the current intensity probe 37 at the foremost end are protected from being damaged by collision during hoisting.
In a preferred embodiment of the invention, the apparatus of the invention further comprises a motion control system and electronics system configured to control the operation of the entire apparatus and the acquisition of signals; the movement of the target head and the transmission component 3 is realized, so that the whole blocking target head component 36 and the current intensity probe 37 are driven to move up and down in the vacuum, and the on-line and off-line functions of the target head are realized; the position state of the target head and the beam current intensity information are monitored by reading the signal of the current intensity probe 37.
In summary, when the present invention is used, as shown in fig. 1 and fig. 2, the independent measuring device shown in fig. 1 is hoisted to the vacuum chamber 5 by the crown block; the flange interfaces 51 on the two sides of the vacuum cavity 5 are connected with the beam pipeline of the accelerator and are sealed with the vacuum cavity 5 in a self-weight pressing mode. The motor 314 drives the linear driving structure 31 to move linearly to drive the corrugated pipe 312 to do telescopic motion, and drives the transmission rod 34, the target head assembly 36 and the current intensity probe 37 to move up and down, so that the online and offline functions of the target head are realized, and the target head emits light when a beam passes through, so that the position and the shape of the beam are confirmed; the current intensity probe confirms the current intensity of the beam current through secondary electrons generated by the collecting film. In conclusion, the invention can meet the requirement of automatic hoisting and realize the position flow intensity measurement of the strong flow beam in the radiation area; the device has the characteristics of simple structure, convenience in use, high reliability and low cost, and can provide reliable service for accelerator beam experiments and machine protection.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A beam position and current intensity measuring device for a radiation area is characterized by comprising:
a shielding guide assembly (1) for blocking radioactive ions and protecting devices externally placed in the vicinity of the apparatus;
the lifting appliance (2) is arranged at the top of the shielding guide assembly (1), and the overhead travelling crane lifts and transports the device through the lifting appliance (2);
the target head and transmission assembly (3) is arranged at the top of the shielding guide assembly (1) and positioned in the middle of the lifting appliance (2) and used for driving the target head assembly (36) and the current intensity probe (37) to act.
2. The beam position and intensity measuring device for the irradiation zone according to claim 1, further comprising a vacuum chamber (5); the device is hoisted into the vacuum cavity (5) by the overhead travelling crane through the hoisting tool (2);
the vacuum cavity is characterized in that flange interfaces (51) are respectively arranged on two sides of the vacuum cavity (5), the flange interfaces (51) are connected with an accelerator beam pipeline, and the device and the flange interfaces (51) are sealed in a self-weight pressing mode.
3. The beam position and current intensity measuring device for the irradiation zone according to claim 1, wherein the hanger (2) and the shielding guide assembly (1), and the target head and transmission assembly (3) and the shielding guide assembly (1) are fixedly and hermetically connected by sealing flanges (32).
4. The beam position and fluence measurement device for a radiation zone as claimed in claim 1, wherein the target and transmission assembly (3) comprises a linear drive structure (31), a sealing flange (32), a camera and camera shielding iron (33), a transmission rod (34), a transmission rod guide (35), a target assembly (36) and a fluence probe (37);
the linear driving structure (31), the camera and the camera shielding iron (33) are fixed on the shielding guide assembly (1) through the sealing flange (32);
the linear driving structure (31) is connected with the first end of the transmission rod (34) and drives the transmission rod (34) to act;
the second end of the transmission rod (34) passes through the inner hole of the shielding guide assembly (1) and is connected with the target head assembly (36) and the flow intensity probe (37);
the drive link guide (35) is disposed on the drive link (34) proximate the second end of the drive link (34) for providing a support guide for the drive link (34) to secure the position of the target head assembly (36) and the flow intensity probe (37).
5. The beam position and current intensity measuring device for the radiation area according to claim 4, wherein the linear driving structure (31) comprises a lead screw guide rail module (311), a vacuum bellows (312), a displacement sensor (313) and a motor (314);
the transmission rod (34) is arranged in the corrugated pipe (312) in a penetrating mode and is connected with one end of the corrugated pipe (312);
the other end of the corrugated pipe (312) is fixedly connected with a sliding block in the lead screw guide rail module (311), and the motor (314) drives the sliding block in the lead screw guide rail module (311) to linearly move along a guide rail, so that the corrugated pipe (312) is driven to perform compression and extension movement, and the transmission rod (34) together with the target head assembly (36) and the flow intensity probe (37) is driven to move up and down;
the displacement sensor (313) is arranged on the lead screw guide rail module (311) and used for monitoring the movement of the corrugated pipe (312).
6. The beam position and current intensity measuring device for the radiation area according to claim 4, wherein the sealing flange (32) is provided with a vacuum observation window (321) for realizing the observation of the camera to the inner target;
the upper end of the sealing flange (32) is provided with a flange connection interface, and the corrugated pipe (312) in the linear driving structure (31) is connected to the sealing flange (32) through the flange connection interface in a sealing mode.
7. The beam position and intensity measuring device for the irradiation zone according to claim 6, wherein the camera and the camera shielding iron (33) are disposed at the upper end of the sealing flange (32);
the camera and the camera shielding iron (33) comprise a camera (331) and a camera shielding iron (332); the camera (331) is disposed within the camera shield iron (332) and is aligned with the vacuum viewing window (321) on the sealing flange (32).
8. The beam position and intensity measurement apparatus according to claim 4, wherein the target head assembly (36) is fixed to the second end of the driving rod (34) by a connector, the target head assembly (36) being disposed at 45 degrees to the beam direction;
the target head assembly (36) is composed of a fixed support and alumina ceramics, and the fixed support is in a transparent circular ring form.
9. The beam position and flux measurement apparatus for an irradiation zone of claim 4, wherein said flux probe (37) comprises a probe holder (371), a shield cylinder assembly (372), and an inner membrane ring assembly (373);
the top of the probe bracket (371) is connected with the second end of the transmission rod (34);
the shielding cylinder assembly (372) adopts an annular structure, is arranged in the probe bracket (371), and is used for shielding internal signals;
the inner membrane ring assembly (373) comprises a three-layer metal membrane frame (374) and an insulating support rod (375); the three layers of metal film frames (374) are arranged at equal intervals, and the adjacent metal film frames (374) are connected in an isolated mode through the insulating support rods (375);
each metal film frame (374) consists of a support ring and a compression ring, and the contact surface has inclination; a metal film is clamped between the support ring and the compression ring, and the metal film is flattened and compressed through an inclination structure.
10. The beam position and current intensity measuring device for the radiation area according to claim 4, further comprising a protection bracket (4) disposed at the foremost end of the shielding guide assembly (1) for protecting the target head assembly (36) and the current intensity probe (37) at the frontmost end during hoisting.
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