CN113031053B - Experimental device and experimental system for neutron beam irradiation experiment - Google Patents
Experimental device and experimental system for neutron beam irradiation experiment Download PDFInfo
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- CN113031053B CN113031053B CN202110010463.6A CN202110010463A CN113031053B CN 113031053 B CN113031053 B CN 113031053B CN 202110010463 A CN202110010463 A CN 202110010463A CN 113031053 B CN113031053 B CN 113031053B
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- 238000002474 experimental method Methods 0.000 title claims abstract description 51
- 230000007246 mechanism Effects 0.000 claims abstract description 67
- 238000012544 monitoring process Methods 0.000 claims abstract description 34
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- 238000005096 rolling process Methods 0.000 claims description 9
- 238000003556 assay Methods 0.000 claims 1
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- 230000000694 effects Effects 0.000 description 6
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- 230000008901 benefit Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000011897 real-time detection Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
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- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
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- 239000004698 Polyethylene Substances 0.000 description 1
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- 238000004590 computer program Methods 0.000 description 1
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- 230000003028 elevating effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T3/00—Measuring neutron radiation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
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Abstract
The disclosure provides an experimental device for a neutron beam irradiation experiment. The experimental device comprises an experiment table, a sample mounting mechanism and a monitoring mechanism. The laboratory bench includes a first table top and at least one support structure for supporting the first table top and effecting movement of the first table top. The sample mounting mechanism is mounted on the first table top. The monitoring mechanism is mounted on the first table top, and the monitoring mechanism is far away from neutron beam current relative to the sample mounting mechanism. The disclosure also provides an experiment system for neutron beam irradiation experiments.
Description
Technical Field
The present disclosure relates to the technical field of nuclear radiation experiments, and more particularly, to an experimental apparatus and an experimental system for neutron beam irradiation experiments.
Background
Neutron single event effect is the main reason for the radiation effect of electronic equipment in the atmosphere radiation environment. With the development of technology, the sensitivity of electronic devices to neutron radiation is higher and higher, so that the electronic system in the aviation aircraft is more prone to risk of neutron single event effect. At present, the neutrons are mainly generated by bombarding a metal target with protons generated by an accelerator at home and abroad, and then the neutron beam irradiates an electronic device placed on an experiment bench to develop neutron single event effect research.
In implementing the concepts of the present disclosure, the inventors found that at least the following problems exist in the prior art: the experiment bench for neutron beam irradiation experiments in the prior art has single function, can only play a role in placing an electronic device sample, is fixed in position and cannot be movably applied to different neutron beam irradiation terminals.
Disclosure of Invention
In view of this, embodiments of the present disclosure provide an experimental apparatus capable of monitoring neutron beam and being movable as a whole, and an experimental system including the experimental apparatus.
One aspect of an embodiment of the present disclosure provides an experimental apparatus for neutron beam irradiation experiments. The experimental device comprises an experiment table, a sample mounting mechanism and a monitoring mechanism. The laboratory bench includes a first table top and at least one support structure for supporting the first table top and effecting movement of the first table top. The sample mounting mechanism is mounted on the first table top. The monitoring mechanism is mounted on the first table top, and the monitoring mechanism is far away from neutron beam current relative to the sample mounting mechanism.
According to an embodiment of the present disclosure, the at least one support structure comprises a first end and a second end. Wherein the first end is connected with the first table top. The second end is far away from the first end, and a rolling body is arranged for realizing the movement of the first table top.
According to an embodiment of the present disclosure, the at least one support structure further comprises a lifting structure. The lifting structure is disposed between the first end and the second end.
According to an embodiment of the disclosure, the rolling bodies are universal wheels.
According to an embodiment of the disclosure, the laboratory bench further comprises a first spacer mounted on the at least one support structure, wherein the first spacer is parallel to the first table top and forms a storage space with the first table top.
According to an embodiment of the present disclosure, the laboratory bench further comprises at least one second spacer disposed between the first table top and the first spacer and perpendicular to the first spacer.
According to an embodiment of the present disclosure, the at least one second separator is a multilayer shielding structure.
According to an embodiment of the present disclosure, the sample mounting mechanism includes at least one sample rack and a sample stage. Wherein the at least one sample holder is for mounting at least one sample. The sample stage comprises a second table top and a two-dimensional moving unit, wherein the second table top is detachably connected with the sample frame, and the two-dimensional moving unit is installed on the first table top.
According to an embodiment of the present disclosure, the two-dimensional mobile unit includes a first mobile structure. The first moving structure is connected with the bottom of the second table top and drives the second table top to move along the direction perpendicular to the neutron beam current.
According to an embodiment of the present disclosure, the two-dimensional mobile unit further comprises a second mobile structure. The second moving structure is connected with the bottom of the first moving structure and drives the first moving structure to move along the direction parallel to the neutron beam, and the second moving structure is arranged on the first table top.
According to an embodiment of the present disclosure, the sample mounting mechanism further comprises at least one rotation stage mounted on the second table top, wherein a rotation portion of the at least one rotation stage is detachably connected with the at least one sample holder.
According to an embodiment of the present disclosure, the monitoring mechanism includes a neutron monitor detachably mounted on the first table top, disposed outside an irradiation range of the neutron beam.
According to an embodiment of the disclosure, the monitoring mechanism further comprises a neutron detector detachably mounted on the first table top and disposed within the irradiation range of the neutron beam.
According to an embodiment of the present disclosure, the apparatus further comprises a laser positioning system mounted on the first tabletop, and the laser positioning system is proximate to the neutron beam with respect to the sample mounting mechanism.
According to an embodiment of the present disclosure, the laser positioning system comprises at least one laser emitting a cross-shaped laser beam.
Another aspect of an embodiment of the present disclosure provides an experiment system for neutron beam irradiation experiments. The experimental system comprises a proton cyclotron and an experimental set-up as described above. The proton cyclotron comprises at least one neutron irradiation pipeline, and the at least one neutron irradiation pipeline is used for emitting neutron beam current. The experimental device is movably arranged at the terminal end of the at least one neutron irradiation pipeline.
One or more of the above embodiments have the following advantages or benefits:
the problem that current experiment bench function is single and the position is fixed can be solved at least partially, neutron beam irradiation experiments are carried out through installing the sample on the sample installation mechanism to combine monitoring mechanism and at least one bearing structure, make experimental apparatus with function fusion such as sample installation, beam monitoring and whole removal in an organic whole.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent from the following description of embodiments thereof with reference to the accompanying drawings in which:
FIG. 1 schematically illustrates an experimental system capable of performing neutron beam irradiation experiments in accordance with an embodiment of the present disclosure;
FIG. 2 schematically illustrates a schematic diagram of an experimental setup for neutron beam irradiation experiments, according to an embodiment of the disclosure;
FIG. 3 schematically illustrates a schematic view of a support structure according to an embodiment of the present disclosure;
FIG. 4 schematically illustrates a schematic view of a sample mounting mechanism according to an embodiment of the disclosure;
Fig. 5 schematically illustrates a schematic view of a first moving structure according to an embodiment of the present disclosure.
Fig. 6 schematically illustrates a schematic view of a sample mounting mechanism according to another embodiment of the present disclosure.
Detailed Description
Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood that the description is only exemplary and is not intended to limit the scope of the present disclosure. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the concepts of the present disclosure.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The terms "comprises," "comprising," and/or the like, as used herein, specify the presence of stated features, steps, operations, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, or components.
All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. It should be noted that the terms used herein should be construed to have meanings consistent with the context of the present specification and should not be construed in an idealized or overly formal manner.
Where a convention analogous to "at least one of A, B and C, etc." is used, in general such a convention should be interpreted in accordance with the meaning of one of skill in the art having generally understood the convention (e.g., "a system having at least one of A, B and C" would include, but not be limited to, systems having a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.). Where a formulation similar to at least one of "A, B or C, etc." is used, in general such a formulation should be interpreted in accordance with the ordinary understanding of one skilled in the art (e.g. "a system with at least one of A, B or C" would include but not be limited to systems with a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.).
The neutron single event effect research is carried out on electronic devices, namely when neutrons enter the microelectronic devices (such as a CPU (Central processing Unit), an FPGA (field programmable Gate array) and the like), the phenomena of logic inversion, latching or permanent damage of the devices are observed. Thus, neutron single event effect refers to a radiation effect that causes abnormal changes in the state of the device, including single event upset, single event latching, single event burnout, etc., by a single neutron passing through the sensitive region of the microelectronic device.
And (3) carrying out neutron beam irradiation experiments, and constructing an experiment system to place a sample on a rack to receive neutron beam irradiation. The prior art laboratory bench is typically a stationary table on which the irradiation experiments are performed by placing the sample. Therefore, the current neutron beam irradiation experiment can only be used at fixed neutron irradiation pipeline terminals, and cannot be movably applied to different neutron irradiation terminals in the same place.
Embodiments of the present disclosure provide an experimental apparatus for neutron beam irradiation experiments. The experimental device comprises an experiment table, a sample mounting mechanism and a monitoring mechanism. The laboratory bench includes a first table top and at least one support structure for supporting the first table top and effecting movement of the first table top. The sample mounting mechanism is mounted on the first table top. The monitoring mechanism is mounted on the first tabletop and is remote from the neutron beam stream relative to the sample mounting mechanism. .
Fig. 1 schematically illustrates a schematic diagram of an experiment system 100 capable of performing neutron beam irradiation experiments in accordance with an embodiment of the present disclosure. It should be noted that fig. 1 is merely an example of an experimental system to which embodiments of the present disclosure may be applied to assist those skilled in the art in understanding the technical content of the present disclosure, but does not mean that the embodiments of the present disclosure may not be used or cooperate with other devices, systems, environments, or scenarios.
As shown in fig. 1, the experimental system 100 includes a proton cyclotron 110 and an experimental setup 120. The proton cyclotron 110 includes at least one neutron irradiation tube 130 (which may include neutron irradiation tubes 131, 132, 133, and 134, for example), wherein the at least one neutron irradiation tube 130 is configured to emit a neutron beam 140. The experimental set-up 120 is movably arranged at the terminal end of at least one neutron irradiation tube 130.
According to an embodiment of the present disclosure, referring to fig. 1, for example, an experimental device 120 is provided at a terminal end of a neutron irradiation tube 131, wherein a sample 121 is placed on the experimental device 120. The proton cyclotron 110 can cause protons to bombard a metal target to produce a neutron beam 140, which is then irradiated onto the sample 121 through a neutron irradiation tube 131.
According to an embodiment of the present disclosure, the proton cyclotron 110 may be a 100MeV proton cyclotron. Wherein, 100MeV proton cyclotron can support to carry out quasi-single-energy neutron and white light neutron irradiation experiments.
It should be understood that the number or size of the proton cyclotron 110, the experimental setup 120, the neutron irradiation tube 130, the neutron beam 140, and the sample 121 in fig. 1 are merely illustrative.
Fig. 2 schematically illustrates a schematic diagram of an experimental apparatus 200 for neutron beam irradiation experiments, according to an embodiment of the disclosure. Wherein experimental setup 200 is one embodiment of experimental setup 120.
As shown in fig. 2, the experimental setup 200 may include a laboratory bench 210, a sample mounting mechanism 220, and a monitoring mechanism 230. The experiment table 210 includes a first table top 211 and at least one support structure 212 (e.g., support structures 2121, 2122, 2123, and 2124), the at least one support structure 212 for supporting the first table top 211 and effecting movement of the first table top. The sample mounting mechanism 220 is mounted on the first table 211. The monitoring mechanism 230 is mounted on the first table 211, the monitoring mechanism 230 being remote from the neutron beam 140 relative to the sample mounting mechanism 220.
As shown in fig. 2, in performing a neutron beam irradiation experiment using an experiment apparatus 200 including an experiment table 210, a sample mounting mechanism 220, a monitoring mechanism 230, and a rolling body 240, first, a sample is mounted on the sample mounting mechanism 220, and then, the neutron beam 140 irradiated on the sample is monitored by the monitoring mechanism 230.
According to embodiments of the present disclosure, a surface of the first mesa 211 may be perforated with a plurality of holes. Referring to fig. 2, a plurality of screw holes are bored in the first stage 211, and the sample mounting mechanism 220 can be fixed to the first stage 211 by bolts. Similarly, the monitoring mechanism 230 is threadably coupled to the first table 211.
According to an embodiment of the present disclosure, referring to fig. 2, the neutron beam 140 irradiates the sample, that is, neutrons in the neutron beam 140 hit the sample. During the irradiation experiment, the sample mounted on the sample mounting mechanism 220 is directly irradiated by the neutron beam 140, so that the sample mounting mechanism 220 is relatively close to the neutron beam 140. The monitoring mechanism 230 is used to monitor the number of neutrons hitting the sample, and can be located at a distance from the neutron beam 140 that is greater than the distance from the sample mounting mechanism 220, because the number of neutrons hitting the sample is not in the irradiation path of the neutron beam 140.
As shown in fig. 2, the experimental setup 200 may also include a laser positioning system 250. The laser positioning system 250 is mounted on the first stage 211 and is positioned proximate to the neutron beam 140 relative to the sample mounting mechanism 220. Laser positioning system 250 includes at least one laser (which may include lasers 251 and 252, for example). Lasers 251 and 252 are capable of producing a cross-shaped laser beam.
According to an embodiment of the present disclosure, the lasers 251 and 252 are capable of emitting two laser beams, such as cross-shaped laser beams, that intersect each other, and such that the intersection of the cross-shaped laser beams is located in the irradiation path of the neutron beam 140, to locate the sample under irradiation.
By utilizing the experimental device 200 of the embodiment of the disclosure, the integrated design of the monitoring mechanism 230, the sample mounting mechanism 220 and the rolling body 240 is arranged on the experiment table 210, and functions of sample mounting, beam monitoring, overall movement and the like can be integrated, so that the experimental device 200 can move at any time, the monitoring mechanism 230 is not required to be arranged separately in the next experiment, and the experimental operation convenience and experimental standardization are effectively improved.
As shown in fig. 2, the experiment table 210 may further include a first partition 213, the first partition 213 being mounted on the at least one support structure 212, wherein the first partition 213 is parallel to the first table 211, and forms a storage space with the first table 211.
According to the embodiment of the disclosure, for example, in the neutron irradiation experiment process of the FPGA device, real-time data detection needs to be performed on the FPGA device, so that the real-time detection system can be placed in the storage space between the first baffle 213 and the first table 211. The real-time detection system is used for sending a command to the FPGA device, monitoring the working state of the FPGA device, receiving experimental data returned by the FPGA device and recording the single event upset condition of the FPGA device in the detection process in real time. It should be understood that other devices needed in the neutron beam 140 irradiation experiment can also be placed in the storage space, which is not specifically limited by the present disclosure.
It should be noted that, in fig. 2, the support structures 2121, 2122, 2123, and 2124 may respectively use 4 support rods to support the first table 211, where four right angles of the first partition 213 are respectively connected to the 4 support rods. As shown in fig. 2, a unitary frame including a first spacer 213 and a first table 211 may be first fabricated and 4 stubs mounted under the frame to obtain the laboratory table 210 of fig. 2. In other embodiments, the first table 211, the first spacer 213, and 4 long bars (the long bars are directly connected to the first table 211) may be manufactured separately and assembled to obtain the experiment table 210.
As shown in fig. 2, the experiment table 210 may further include at least one second partition 260 (e.g., 261, 262, and 263 may be included), wherein the at least one second partition 260 is disposed between the first table 211 and the first partition 213 and perpendicular to the first partition 213.
As shown in fig. 2, at least one second separator 260 is a multi-layered shielding structure.
According to the embodiments of the present disclosure, the multilayer shielding structure can be constituted by, for example, iron, polyethylene, lead, or the like.
According to embodiments of the present disclosure, referring to fig. 2, for example, second baffles 261, 262, 263 may be provided to partially enclose the storage space between the first baffle 213 and the first mesa 211 to form a partial shielding system.
By using the experimental device of the embodiment of the disclosure, the radiation damage risk of the radiation generated by the neutron beam 140 to the real-time detection system, the monitoring data acquisition equipment, the power supply and other experimental equipment can be avoided by arranging the plurality of second separators 260 to form the local shielding system, so that the accuracy of experimental data is improved.
As shown in fig. 2, the monitoring mechanism 230 includes neutron supervisors 231 and 232. Neutron supervisors 231 and 232 are detachably mounted on the first table 211, and are disposed outside the irradiation range of the neutron beam 140.
According to an embodiment of the present disclosure, the monitoring mechanism 230 further includes a neutron detector (not shown in fig. 2) removably mountable on the first table 211, disposed within the irradiation range of the neutron beam 140.
In the neutron beam 140 irradiation experiments according to the embodiments of the present disclosure, it is necessary to acquire the number of neutrons irradiated onto the sample to analyze the experimental data. Taking the neutron monitor 231 as an example, first, the neutron detector and the neutron monitor 231 are simultaneously arranged, wherein the neutron detector is arranged at a preset sample irradiation point position, and the neutron monitor 231 is arranged outside the irradiation range of the neutron beam 140 (i.e., the neutron monitor 231 is not on the irradiation path of the neutron beam 140). The neutron detector then receives the radiation of neutron beam 140, resulting in a neutron count M0. Meanwhile, the neutron monitor 231 receives the number of neutrons N0. Then, by the above data, the relation K between the neutron monitor 231 and the neutron detector is calibrated, where k=m0/N0. Then, the neutron detector is detached (the neutron monitor 231 is kept still) so that the sample is moved to the preset irradiation point position, and then the neutron beam 140 irradiates the sample. Finally, during the experiment, the neutron count m1=kxn1 irradiated to the sample can be calculated by counting N1 by neutron monitor 231.
According to embodiments of the present disclosure, the neutron detector and neutron monitor, while functioning differently, may choose the same type of neutron detection device to obtain the received neutron beam at different locations.
According to embodiments of the present disclosure, neutron monitors 231 and 232 can be simultaneously disposed on the first mesa, mutually corroding neutron counts, to improve accuracy of experimental data.
According to embodiments of the present disclosure, the preset sample irradiation point positions can be determined by crossing points of the cross-shaped laser beams emitted from the laser positioning system 250, such that the mid-detector and the sample are placed at the crossing point positions, respectively, in succession. The laser positioning system 250 may have a coordinate system, for example, and can feed back coordinate information of the corresponding intersection.
It should be noted that, by obtaining the relationship K between the neutron monitor and the neutron detector, the experimenter can calculate the number of neutrons irradiated onto the sample. Thus, the location of the neutron monitor shown in fig. 1 is merely an example, and the present disclosure is not limited to its specific location.
According to embodiments of the present disclosure, a proton cyclotron produces a neutron beam that contains more than neutrons, and may also include gamma rays. In the experimental process, for example, a gamma detector and a gamma monitor can be arranged, and the neutron monitoring steps are repeated to monitor the gamma. Wherein, referring to fig. 1, when gamma needs to be monitored, the monitoring mechanism 230 may be made to include a neutron monitor 231 and a gamma monitor 232. It should be understood that the experimenter can set whether gamma needs to be monitored or not according to the actual situation.
According to embodiments of the present disclosure, a neutron and gamma monitor and detector is placed on a first table, such as a neutron dosimeter, gamma dosimeter, or the like.
According to embodiments of the present disclosure, for example, a 3He sphere with neutron moderator can be used for neutron monitoring, and for example, a NaI detector can be used for gamma monitoring.
Fig. 3 schematically illustrates a schematic view of a support structure 300 according to an embodiment of the present disclosure. Wherein support structure 300 is one embodiment of support structure 212.
As shown in fig. 3, and in combination with fig. 1, the support structure 300 includes a first end 310, a second end 320. Wherein the first end 310 is connected to the first mesa 211. The second end 320 is remote from the first end 310 and is provided with a rolling element 240 for effecting movement of the first table 211.
According to an embodiment of the present disclosure, rolling elements 240 may be universal wheels. The rolling elements 240 may be rollers, spheres, rods, or the like.
As shown in fig. 3, the support mechanism 300 further includes a lifting structure 330, the lifting structure 330 being disposed between the first end 310 and the second end 320.
According to an embodiment of the present disclosure, referring to fig. 3, the elevating structure 330 may include a square bar 331 and a round bar 332, wherein a threaded hole may be opened inside the square bar 331. In addition, a screw thread is provided at one end of the round bar 332 to rotate into the square bar 331. The lifting distance of the whole experiment table 210 is controlled by controlling the length of the round bar 332 which rotates into the square bar 331.
According to the embodiment of the disclosure, for example, the length of a laboratory bench is 1600mm, the width is 1100 mm, the up-and-down movement stroke (1350+/-250) of the lifting structure is 1350 mm, and the load is greater than or equal to 100 kg.
The proton cyclotron is large in size, precise and difficult to adjust. By using the experimental device 200 of the embodiment of the disclosure, the position of the sample relative to the neutron beam 140 can be adaptively adjusted, so that the experimental efficiency is improved.
Fig. 4 schematically illustrates a schematic diagram of a sample mounting mechanism 400 according to an embodiment of the disclosure. Wherein sample mounting mechanism 400 is one embodiment of sample mounting mechanism 220.
As shown in fig. 4, the sample mounting mechanism 400 includes at least one sample rack 410 and a sample stage 420. Wherein the sample stage 420 includes a second stage 421 detachably connected to the sample holder 410, and a two-dimensional moving unit 422 mounted on the first stage 211.
As shown in fig. 4, the two-dimensional moving unit 422 includes a first moving structure 4221 and a second moving structure 4222. The first moving structure 4221 is connected to the bottom of the second table 421, and drives the second table 421 to move along a direction perpendicular to the neutron beam 140. The second moving structure 4222 is connected to the bottom of the first moving structure 4221, and drives the first moving structure 4221 to move along a direction parallel to the neutron beam 140, where the second moving structure 4222 is installed on the first table 211.
According to an embodiment of the present disclosure, the second table 421 may be a perforated plate, and the sample holder 410 may include a field-shaped frame 411 and a round bar 412. Wherein, the frame 411 is fixedly connected with the round bar 412. The round bar 412 can be removably coupled to the second table 421, for example, such that the round bar 412 can be directly threadedly coupled to the second table 421.
As shown in fig. 4, the sample mounting mechanism 400 further includes at least one rotary table 430, and the rotary table 430 is mounted on the second table 421, wherein a rotating portion 431 of the rotary table 430 is detachably connected with the sample holder 410.
According to an embodiment of the present disclosure, the rotation table 430 may include a rotation portion 431 and a fixing portion 432. Wherein the fixing portion 432 is connected to the second table 421. The fixing portion 432 includes a rotation shaft connected to the rotation portion 431, and rotates the rotation portion 431 by the rotation shaft. The round bar 412 of the sample holder 410 is screw-coupled to the rotating portion 431 to rotate following the rotating portion 431.
In the process of carrying out irradiation experiments on the sample, the rotary table 430 can be utilized to drive the sample to rotate, so that the angle of the sample receiving neutron beam 140 irradiation is changed, and the irradiation mode of the sample is effectively expanded.
Fig. 5 schematically illustrates a schematic view of a first moving structure 500 according to an embodiment of the present disclosure. Wherein the first moving structure 500 is one of the embodiments of the first moving structure 4221.
As shown in fig. 5, the first moving structure 500 may include, for example, a lead screw 510, a support 520, and a base 530, and both ends of the lead screw 510 may be installed in the base 530 such that an axial direction of the lead screw 510 is perpendicular to the neutron beam 140. The support 520 may include a nut 521 and a connecting plate 522, where the nut 521 is fixed on the screw 510 and moves back and forth on the screw 510 along with the rotation of the screw 510. And, the surface of the connecting plate 522 is provided with a threaded hole, so that the bottom of the second table 421 can be connected with the connecting plate 522 through a bolt.
According to an embodiment of the present disclosure, the second moving structure 4222 may refer to the first moving structure 500, which is not described herein.
It should be noted that the first moving structure 500 is only an example, and for example, a belt transmission mechanism, a rack and pinion transmission mechanism, or the like may be selected to implement the two-dimensional moving function.
According to an embodiment of the present disclosure, for example, a stroke of the first moving structure 500 driving the second table 421 to move may be set to be 1000mm, a stroke of the second moving structure 4221 driving the first moving structure 500 to move may be set to be 1500mm, and translational accuracy may be set to be 0.5mm. The rotation table 430 can perform 360 ° rotation with a rotation accuracy of 0.1 °.
With the experimental device of the embodiment of the disclosure, a plurality of samples can be mounted on the sample holder 410, so that during the experimental process, different samples are driven to move to the preset irradiation position by the two-dimensional moving unit 422 to replace the sample irradiated by the neutron beam 140.
According to embodiments of the present disclosure, referring to fig. 2 to 4, a lifting structure, a two-dimensional moving unit, and a rotary table may be all equipped with a remote movement control device. By adopting a remote control mode, manual operation is reduced in a neutron beam irradiation experiment, and the risk of personnel being irradiated can be reduced.
Fig. 6 schematically illustrates a schematic diagram of a sample mounting mechanism 400 according to another embodiment of the present disclosure. Where neutron beam 610 is one embodiment of neutron beam 140.
As shown in fig. 6, sample mounting mechanism 400 may include 2 sample holders 411 (e.g., sample holder 4111 and sample holder 4112), and 2 rotation stages 431 (e.g., rotation stage 4311 and rotation stage 4312), wherein neutron beam stream 610 may include neutron beams 611 and 612, sample holder 4111 has region 620 for placing a sample thereon, and sample holder 4112 has region 630 for placing a sample thereon.
In accordance with an embodiment of the present disclosure, referring to fig. 6, during an irradiation experiment, first, a neutron beam 611 irradiates a sample on a region 630, at this time, only a small number of neutrons in the neutron beam 611 interact with the sample, so as to have an irradiation effect on the sample, and most of neutrons directly penetrate the sample. Then, the neutron beam 612 continues to irradiate the sample on the region 620, and performs an irradiation experiment thereon. The neutron beam 612 is a beam after the neutron beam 611 penetrates the sample.
By using the experimental device of the embodiment of the disclosure, the stacked irradiation method is adopted, neutrons in the neutron beam 610 can be fully utilized, and the experimental efficiency is improved, so that the starting times of the proton cyclotron are reduced.
It should be noted that, in the present disclosure, the number of the sample holders and the rotating table is not specifically limited, and a plurality of sample holders and rotating tables may be flexibly set according to the number of neutrons contained in the neutron beam and the type of the sample. In addition, the location and size of the sample area in fig. 6 is merely exemplary, and the present disclosure may also be adapted thereto.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Those skilled in the art will appreciate that the features recited in the various embodiments of the disclosure and/or in the claims may be combined in various combinations and/or combinations, even if such combinations or combinations are not explicitly recited in the disclosure. In particular, the features recited in the various embodiments of the present disclosure and/or the claims may be variously combined and/or combined without departing from the spirit and teachings of the present disclosure. All such combinations and/or combinations fall within the scope of the present disclosure.
The embodiments of the present disclosure are described above. These examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although the embodiments are described above separately, this does not mean that the measures in the embodiments cannot be used advantageously in combination. The scope of the disclosure is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be made by those skilled in the art without departing from the scope of the disclosure, and such alternatives and modifications are intended to fall within the scope of the disclosure.
Claims (7)
1. An experimental apparatus for neutron beam irradiation experiments, comprising:
a laboratory bench comprising a first table top and at least one support structure, wherein the at least one support structure is for supporting the first table top and effecting movement of the first table top;
the sample mounting mechanism is mounted on the first table top; and
The monitoring mechanism is arranged on the first table top and is far away from neutron beam current relative to the sample mounting mechanism;
The at least one support structure comprises:
the first end is connected with the first table top;
The second end is far away from the first end and is provided with a rolling body for realizing the movement of the first table top;
a lifting structure disposed between the first end and the second end;
The laboratory bench further comprises:
A first partition board mounted on the at least one supporting structure, wherein the first partition board is parallel to the first table top, and a storage space is formed between the first partition board and the first table top;
At least one second baffle plate is arranged between the first table top and the first baffle plate and is perpendicular to the first baffle plate, and the at least one second baffle plate is of a multi-layer shielding structure;
The sample mounting mechanism includes:
At least one sample holder for mounting at least one sample;
A sample stage, the sample stage comprising:
The second table top is detachably connected with the sample rack;
a two-dimensional moving unit mounted on the first table top;
the two-dimensional moving unit includes:
the first moving structure is connected with the bottom of the second table top and drives the second table top to move along the direction perpendicular to the neutron beam;
the second moving structure is connected with the bottom of the first moving structure and drives the first moving structure to move along the direction parallel to the neutron beam, wherein the second moving structure is arranged on the first table top;
the sample mounting mechanism further comprises:
And the at least one rotary table is arranged on the second table top, and the rotary part of the at least one rotary table is detachably connected with the at least one sample frame.
2. The experimental set-up according to claim 1, wherein the rolling bodies are universal wheels.
3. The experimental set-up of claim 1, the monitoring mechanism comprising:
and the neutron monitor is detachably arranged on the first table top and is arranged outside the irradiation range of the neutron beam.
4. The experimental set-up of claim 3, the monitoring mechanism further comprising:
And the neutron detector is detachably arranged on the first table top and is arranged in the irradiation range of the neutron beam.
5. The experimental set-up of claim 1, further comprising:
And the laser positioning system is arranged on the first table top and is close to the neutron beam relative to the sample mounting mechanism.
6. The assay device of claim 5, the laser positioning system comprising at least one laser that emits a cross-shaped laser beam.
7. An experiment system for neutron beam irradiation experiments, comprising:
The proton cyclotron comprises at least one neutron irradiation pipeline, wherein the at least one neutron irradiation pipeline is used for emitting neutron beam current;
The experimental set-up of any of claims 1-6, which is movably arranged at a terminal end of the at least one neutron irradiation conduit.
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