CN112666596B - Laser fusion neutron irradiation effect testing device - Google Patents
Laser fusion neutron irradiation effect testing device Download PDFInfo
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- CN112666596B CN112666596B CN202011495366.2A CN202011495366A CN112666596B CN 112666596 B CN112666596 B CN 112666596B CN 202011495366 A CN202011495366 A CN 202011495366A CN 112666596 B CN112666596 B CN 112666596B
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- 230000000694 effects Effects 0.000 title claims abstract description 30
- 230000004927 fusion Effects 0.000 title claims abstract description 21
- 238000012360 testing method Methods 0.000 title claims abstract description 21
- 239000013307 optical fiber Substances 0.000 claims abstract description 19
- 239000000523 sample Substances 0.000 claims description 57
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 8
- 238000011156 evaluation Methods 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 230000005855 radiation Effects 0.000 description 8
- 239000000835 fiber Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 230000032683 aging Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004980 dosimetry Methods 0.000 description 1
- 238000004643 material aging Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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Abstract
The invention discloses a laser fusion neutron irradiation effect testing device which comprises an acquisition module, wherein a first pipeline and a second pipeline which extend outwards are installed on the acquisition module, the far end of the second pipeline is connected with a sample placing assembly and used for fixing a sample, the far end of the first pipeline is connected with a detecting head assembly and used for measuring the neutron dose near the sample, the acquisition module is connected with the detecting head assembly through a first optical fiber, the acquisition module is connected with the sample placing assembly through a second optical fiber, and the first optical fiber and the second optical fiber are respectively arranged in the first pipeline and the second pipeline. The invention has the beneficial effects that: the corresponding components within the acquisition module can be prevented from being irradiated by neutrons to ensure the accuracy of neutron dose measurement and effect evaluation.
Description
Technical Field
The invention belongs to the technical field of neutron detection, and particularly relates to a laser fusion neutron irradiation effect testing device.
Background
Neutron irradiation is an important method for equipping a radiation-resistant reinforcement test, and in order to enable a sample to receive enough multiple doses of neutron irradiation during a neutron irradiation effect test, the sample needs to be placed at a position close to a neutron radiation source.
In order to measure the neutron irradiation dose received by the sample, the prior art means that a neutron detector is directly placed near the sample to measure the neutrons. However, the neutron irradiation intensity near the radiation source is very high, which causes strong interference to the electronic system of the neutron detector itself, so that the measurement of the neutron dose has a large error. Meanwhile, the neutron irradiation with higher intensity can also cause the acquisition module of the detector to be interfered, and great errors are caused to the evaluation of the effect.
Disclosure of Invention
In view of this, the invention provides a laser fusion neutron irradiation effect testing device to solve the technical problem in the prior art that the error of neutron dose measurement and effect evaluation is large.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a laser fusion neutron irradiation effect testing arrangement which the key lies in: including collection module, install first pipeline and the second pipeline of outside extension on the collection module shown, wherein the distal end of second pipeline is connected with the sample and places the subassembly for fixed sample, the distal end of first pipeline is connected with the detecting head subassembly, is used for measuring near neutron dose of sample, be connected through first optic fibre between collection module and the detecting head subassembly, collection module and sample are placed and are passed through second optic fibre between the subassembly and be connected, first pipeline and second pipeline are arranged respectively in to first optic fibre and second optic fibre.
By adopting the structure, when effect test is carried out, the sample receives neutron irradiation in the sample placement component, the probe head component measures neutrons near the sample, and then the neutrons are collected by the far-end collection module, so that the neutron irradiation dose of the sample is measured, and the evaluation of the effect is completed. The acquisition module is located a distance from the sample placement assembly and the probe head assembly that prevents the corresponding components within the acquisition module from being irradiated by neutrons to ensure accuracy of neutron dosimetry and effect evaluation.
Preferably, the method comprises the following steps: the first pipeline and the second pipeline are both metal pipes. By adopting the structure, the pipeline has certain strength, the probe head assembly and the sample placing assembly can be stably supported, and the optical fiber inside the probe head assembly and the sample placing assembly can be protected.
Preferably, the method comprises the following steps: the detector head assembly is internally provided with a neutron scintillator and a first lens, wherein the first lens is connected with the first optical fiber. By adopting the structure, the radiation dose to which the sample is subjected can be conveniently detected by the neutron scintillator.
Preferably, the method comprises the following steps: the sample placement assembly includes a metal housing for mounting a sample, and a second lens connected to a second optical fiber. The structure is adopted, so that a sample to be tested can be conveniently installed.
Preferably, the method comprises the following steps: the acquisition module comprises a shielding box, and a photoelectric conversion module and a storage module which are arranged in the shielding box, wherein the photoelectric conversion module is connected with the storage module through a data line, and the first optical fiber and the second optical fiber are both connected to the photoelectric conversion module.
Preferably, the method comprises the following steps: rays that end at the probe head assembly and sample placement assembly intersect in a plane. By adopting the structure, the neutron scintillator and the sample can be ensured to be placed on the circumference at the same distance from the neutron radiation source, so that the neutron radiation doses received by the neutron scintillator and the sample are the same.
Preferably, the method comprises the following steps: the first pipeline and the second pipeline are of bent structures, and the middle parts of the first pipeline and the second pipeline are bent towards opposite directions. By adopting the structure, the path that neutrons pass through in the line can be prevented from being too long, the equipment protection is facilitated, and the interference is reduced.
Preferably, the method comprises the following steps: the shielding body is arranged on one side of the shielding box close to the probe head assembly. By adopting the structure, the shielding effect can be achieved, and the acquisition module is further protected from being influenced by neutron irradiation.
Compared with the prior art, the invention has the beneficial effects that:
1. the acquisition module has a certain distance relative to the neutron scintillator and the sample, and can prevent corresponding components in the acquisition module from being irradiated by neutrons so as to ensure the accuracy of neutron dose measurement and effect evaluation.
2. The first pipeline and the second pipeline are designed into bending structures, so that the phenomenon that neutrons pass through a path in a circuit is too long can be avoided, and the effects of reducing interference, preventing material aging, protecting equipment and the like are achieved.
Drawings
Fig. 1 is a schematic structural diagram of a neutron irradiation effect testing device.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
As shown in figure 1, the laser fusion neutron irradiation effect testing device relates to the following main parts: the device comprises a collection module A, a probe head component B and a sample placing component C. Wherein be connected through first pipeline 4 between probe head subassembly B and the collection module A, be connected through second pipeline 9 between sample placement component C and the collection module A, be equipped with first optic fibre 5 of connection between probe head subassembly B and the collection module A in the first pipeline 4, be equipped with the second optic fibre 10 of connection between sample placement component C and the collection module A in the second pipeline 9, first pipeline 4 and second pipeline 9 are the tubular metal resonator, the tubular metal resonator has certain intensity, not only can be firm support play probe head subassembly B and sample placement component C, and can play the guard action to its inside optic fibre.
The sample placement assembly C includes a metal housing 6 for mounting the sample, and a second lens 8 disposed within the metal housing 6. The probe assembly B includes an outer housing 1, and a neutron scintillator 2 and a first lens 3 disposed inside the outer housing 1. The acquisition module A comprises a shielding box 11, a photoelectric conversion module 12 and a storage module 13 which are arranged in the shielding box 11, the photoelectric conversion module 12 is connected with the storage module 13 through a data line 14, and the first optical fiber 5 and the second optical fiber 10 are both connected to the photoelectric conversion module 12.
As shown in fig. 1, when the neutron irradiation effect test is performed on the sample 7, the distances between the neutron scintillators 2 and the sample 7 and the fusion neutron source 17 are equal, the neutron radiation doses received by the neutron scintillators 2 and the sample 7 are the same, then the signal collected by the photoelectric conversion module 12 is transmitted to the storage module 13 through the data line 14 for temporary storage, and after irradiation is finished, the signal is transmitted to the background computer through the data line 15 for processing. Because the acquisition module A and the internal components thereof have a longer distance from the fusion neutron source 17, and the acquisition module A is provided with the shielding box 11 and the shielding body 16 arranged on the left side of the shielding box 11, the acquisition module A and the internal components thereof are hardly irradiated by neutrons, and the accuracy of neutron dose measurement and effect evaluation can be ensured.
In order to ensure that the neutron scintillator 2 and the sample 7 can receive neutron radiation with the same dose, the detecting head component B and the sample placing component C are positioned in the same plane, rays taking the neutron scintillator 2 and the sample 7 as end points are intersected in the plane, and when the neutron irradiation effect test is carried out on the sample 7, the fusion neutron source 17 is placed at the intersection point, so that the equal distance between the neutron scintillator 2 and the fusion neutron source 17 and the distance between the sample 7 and the fusion neutron source 17 can be ensured.
Because the thicker the material thickness that the neutron passed through, the higher the probability that the neutron was absorbed by the material, can cause interference and material ageing and loss after the material absorbed the neutron, so the middle part of first pipeline 4 and second pipeline 9 is crooked setting towards opposite direction in this embodiment to avoid the neutron to take over length in the route, thereby play protection equipment, reduce the effect of measuring the interference. The bent forms of the first and second ducts 4 and 9 are not limited to this.
Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.
Claims (8)
1. The utility model provides a laser fusion neutron irradiation effect testing arrangement which characterized in that: the neutron detector comprises a collecting module (A), wherein a first pipeline (4) and a second pipeline (9) which extend outwards are installed on the collecting module (A), the far end of the second pipeline (9) is connected with a sample placing component (C) and used for fixing a sample (7), the far end of the first pipeline (4) is connected with a detecting head component (B) and used for measuring neutron dose near the sample (7), the collecting module (A) is connected with the detecting head component (B) through a first optical fiber (5), the collecting module (A) is connected with the sample placing component (C) through a second optical fiber (10), and the first optical fiber (5) and the second optical fiber (10) are respectively arranged in the first pipeline (4) and the second pipeline (9);
the fusion neutron source (17) is arranged at the same distance from the probe assembly (B) and the sample placing assembly (C).
2. The laser fusion neutron irradiation effect test device of claim 1, characterized in that: the first pipeline (4) and the second pipeline (9) are both metal pipes.
3. The laser fusion neutron irradiation effect test device of claim 1, characterized in that: the detector head assembly (B) is internally provided with a neutron scintillator (2) and a first lens (3), wherein the first lens (3) is connected with the first optical fiber (5).
4. The laser fusion neutron irradiation effect test device of claim 1, characterized in that: the sample placement assembly (C) comprises a metal housing (6) for mounting a sample, and a second lens (8) connected to a second optical fiber (10).
5. The laser fusion neutron irradiation effect test device of claim 1, characterized in that: the acquisition module (A) comprises a shielding box (11), a photoelectric conversion module (12) and a storage module (13) which are arranged in the shielding box (11), the photoelectric conversion module (12) and the storage module (13) are connected through a data line (14), and the first optical fiber (5) and the second optical fiber (10) are both connected to the photoelectric conversion module (12).
6. The laser fusion neutron irradiation effect test device of claim 1, characterized in that: the first pipeline (4) and the second pipeline (9) are of bent structures.
7. The laser fusion neutron irradiation effect test device of claim 6, characterized in that: the middle parts of the first pipeline (4) and the second pipeline (9) are bent towards opposite directions.
8. The laser fusion neutron irradiation effect test device of claim 5, characterized in that: and a shielding body (16) is arranged on one side of the shielding box (11) close to the probe head assembly (B).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011495366.2A CN112666596B (en) | 2020-12-17 | 2020-12-17 | Laser fusion neutron irradiation effect testing device |
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| CN202011495366.2A CN112666596B (en) | 2020-12-17 | 2020-12-17 | Laser fusion neutron irradiation effect testing device |
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| CN113295309B (en) * | 2021-05-31 | 2022-06-07 | 中国工程物理研究院激光聚变研究中心 | Strong X-ray pulse mechanical effect testing device based on point emission source |
| CN113687406A (en) * | 2021-09-23 | 2021-11-23 | 中国工程物理研究院激光聚变研究中心 | Pulse neutron emission time detector |
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| US9268043B2 (en) * | 2012-09-27 | 2016-02-23 | Alexander DeVolpi | Radiation-monitoring system with correlated hodoscopes |
| EP3707500A1 (en) * | 2017-05-31 | 2020-09-16 | Aachen Institute for Nuclear Training GmbH | Method and device for multielement analysis on the basis of neutron activation, and use |
| CN107728191B (en) * | 2017-11-22 | 2023-10-31 | 中国工程物理研究院激光聚变研究中心 | Four-channel space localization X-ray radiation flow diagnosis device |
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