CN112763243A - Near-earth space multi-energy band neutron radiation environment simulation system and method - Google Patents
Near-earth space multi-energy band neutron radiation environment simulation system and method Download PDFInfo
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- CN112763243A CN112763243A CN202011421503.8A CN202011421503A CN112763243A CN 112763243 A CN112763243 A CN 112763243A CN 202011421503 A CN202011421503 A CN 202011421503A CN 112763243 A CN112763243 A CN 112763243A
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Abstract
The invention discloses a near-earth space multi-energy band neutron radiation environment simulation system and a method. The system comprises: the neutron source, the neutron moderating body array, the control driving unit, the motion execution unit and the neutron energy and flow intensity detection unit are miniaturized. The invention moderates fast neutron beams generated by a miniaturized neutron source to a plurality of energy sections through the movable neutron moderating body array, thereby meeting the simulation requirement of the near-earth space multi-energy section neutron radiation environment. The simulation method realizes the simulation of the neutron radiation environment in multiple energy sections with relatively low construction and use cost under the laboratory environment with limited floor area, and develops the ground equivalent simulation experiment of the neutron radiation environment in the near-earth space atmosphere wide energy section.
Description
Technical Field
The invention relates to the technical field of space environment space-ground equivalence test and simulation, in particular to a near-earth space multi-energy band neutron radiation environment simulation system and method.
Background
The near-earth space atmospheric neutrons can induce a variety of radiation effects for aircraft electronics, including but not limited to single event effects, displacement damage, and total dose effects, with the single event effect being the predominant. The effect can cause serious consequences such as Single Event Upset (SEU) of a memory in the aircraft, Single Event Burnout (SEB) of a power field effect tube, Single Event Lockout (SEL) of a CMOS device and the like. Thermal neutrons in the atmosphere of the near-earth space are the main cause of inducing single event upset.
The development of neutron-induced single event effect experiments is a necessary measure for preventing hazardous consequences and improving the safety and reliability of the aircraft. The existing experimental approaches mainly comprise two approaches of an actual flight experiment and a ground equivalent simulation experiment. Although the actual flight experiment is more direct and accurate, the experiment cost is too high; the difficulty and the key problem of the ground equivalent simulation experiment are designing and realizing a neutron radiation environment simulation system similar to a neutron radiation environment in a near-earth space atmosphere wide energy band. At present, methods for simulating neutron radiation environments include a hash neutron source, a fission reactor neutron source, an accelerator single-energy neutron source, a radioisotope neutron source, a neutron tube and the like, wherein the hash neutron source can obtain a neutron energy spectrum similar to a near-earth space atmospheric wide-energy-band neutron radiation environment. In order to obtain response data of various common electronic devices of aircrafts on neutron radiation, scientific research and engineering institutions need to develop a large number of ground simulation experiments, but hash neutron sources, fission reactor neutron sources and the like belong to national-level large scientific engineering, and have the advantages of huge volume, high manufacturing cost and high use cost; the neutron energy spectrums of an accelerator mono-energy neutron source, a radioactive isotope neutron source, a neutron tube and the like are single, and the difference with the practical near-earth space atmospheric neutron environment is large.
Disclosure of Invention
The invention provides a near-earth space multi-energy-band neutron radiation environment simulation system and a near-earth space multi-energy-band neutron radiation environment simulation method, which can realize multi-energy-band neutron radiation environment simulation with relatively low construction and use cost under a laboratory environment with limited floor space.
In order to achieve the above purpose, the invention provides the following technical scheme:
according to a first aspect of the embodiments of the present invention, there is provided a near-earth space multi-energy band neutron radiation environment simulation system, including:
the miniaturized neutron source is used for generating a fast neutron beam;
the neutron moderating body array is used for moderating fast neutron beams generated by the miniaturized neutron source to a set energy section;
the control driving unit is used for controlling and driving the miniaturized neutron source to generate a fast neutron beam with set flow intensity and controlling the position of the neutron moderating body array;
the motion execution unit is used for receiving the control driving unit signal and driving the neutron moderating body array to move;
and the neutron energy and current intensity detection unit is used for detecting the energy and current intensity of the emitted multi-energy-band neutron beam current and feeding back the information to the control driving unit.
As an alternative embodiment, in the present invention, the miniaturized neutron source is a deuterium-tritium neutron tube, a self-sealing neutron tube, or a radioactive isotope neutron source.
In an alternative embodiment, the neutron moderator array is heavy water or polyethylene or lead.
As an alternative embodiment, in the present invention, the control driving unit includes a control computer and a high voltage power supply.
As an optional implementation manner, in the present invention, the motion execution unit is composed of an electrically controlled translation stage, an electrically controlled lifting stage, and an electrically controlled turntable.
In an alternative embodiment, the neutron energy and flux detection unit includes a neutron detector and a signal output component.
As an optional implementation manner, in the present invention, the control driving unit is connected to the miniaturized neutron source and the motion execution unit through a first data line, the motion execution unit is connected to the neutron moderating body array through a second data line and a mechanical interface, and the neutron energy and current intensity detection unit is connected to the control driving unit through a third data line.
As an alternative embodiment, in the present invention, the control driving unit is connected to the miniaturized neutron source and the motion execution unit through a first data line; the motion execution unit is connected with the neutron moderating body array through a second data line and a mechanical interface; the neutron energy and flow intensity detection unit is connected with the control driving unit through a third data line.
According to a second aspect of the embodiments of the present invention, the present invention further provides a method for simulating a neutron radiation environment in a near-earth space multi-energy band, the method including:
the control driving unit controls and drives the miniaturized neutron source to generate fast neutron beams with set flow intensity, the motion executing unit is controlled to drive the neutron moderating body array to move to a selected position, the fast neutron beams generated by the miniaturized neutron source are received to be incident, the fast neutron beams reach the set energy section through moderation and are emitted, and a neutron radiation environment is provided.
As an optional implementation, the method further comprises: the neutron energy and current intensity detection unit detects the energy and current intensity of the emergent multi-energy-cutoff neutron beam current and feeds information back to the control driving unit.
The invention has the following technical effects:
the technical scheme of the invention can realize the simulation of the multi-energy-band neutron radiation environment in the laboratory environment with limited floor area and relatively low construction and use cost, and develop the ground equivalent simulation experiment of the near-earth space atmospheric wide-energy-band neutron radiation environment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic structural diagram of a near-earth space multi-energy band neutron radiation environment simulation system according to an embodiment of the present invention;
the neutron source device comprises a miniaturized neutron source 1, a neutron moderating body array 2, a control driving unit 3, a motion execution unit 4 and a neutron energy and flow intensity detection unit 5.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more apparent, the present invention is described in further detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The core idea of the invention is to adopt a movable neutron moderating body array to moderate fast neutron beams generated by a miniaturized neutron source to a plurality of energy sections, thereby meeting the simulation requirement of the near-earth space multi-energy section neutron radiation environment.
Example 1
The present embodiment provides a near-earth space multi-energy band neutron radiation environment simulation system, referring to fig. 1, the near-earth space multi-energy band neutron radiation environment simulation system includes: the neutron source device comprises a miniaturized neutron source 1, a neutron moderating body array 2, a control driving unit 3, a motion execution unit 4 and a neutron energy and flow intensity detection unit 5.
The miniaturized neutron source 1 is used for generating fast neutron beams. The existing known devices capable of generating fast neutron beams can be used as the miniaturized neutron source of the invention, such as self-sealing neutron tubes, radioactive isotope neutron sources and the like.
And the neutron moderating body array 2 is used for moderating the fast neutron beam generated by the miniaturized neutron source 1 to a set energy section. Neutron moderation refers to the phenomenon in which neutrons collide with the nuclei of the medium, causing the energy of the neutrons to be reduced and slowed down. In the invention, the moderator material which can be used comprises heavy water, polyethylene, lead and the like, and can be made into a block shape according to the requirement, and the block shape is placed in the emitting direction of the neutron source to moderate the neutron beam.
And the control driving unit 3 is used for controlling and driving the miniaturized neutron source 1 to generate a fast neutron beam with set flow intensity and controlling the position of the neutron moderating body array 2. The control drive unit comprises a control computer and a high-voltage power supply, wherein the control computer sets the output voltage of the high-voltage power supply.
And the motion execution unit 4 is used for receiving a signal for controlling the driving unit 3 and driving the neutron moderating body array 2 to move. The motion execution unit 4 of the invention consists of an electric control translation table, an electric control lifting table and an electric control rotary table.
The neutron energy and current intensity detection unit 5 comprises a neutron detector and a signal output component, is used for detecting the energy and current intensity of the emitted multi-energy-band neutron beam, and feeds back information to the control driving unit 3.
Wherein the control drive unit 3 is connected with the miniaturized neutron source 1 and the motion execution unit 4. As an implementable solution, the control drive unit 3 is connected to the miniaturized neutron source 1 and the motion execution unit 4 via a first data line. The computer in the control driving unit 3 sets the output voltage of the high-voltage power supply, controls and drives the miniaturized neutron source 1 to generate a fast neutron beam with set flow intensity, and controls the computer in the control driving unit 3 to control the electric control translation table, the electric control lifting table and the electric control rotary table of the motion execution unit 4 to move so as to drive the neutron moderating body array 2 to move.
The motion execution unit 4 is connected to the neutron moderator array 2. As an implementable technical solution, the motion execution unit 4 is connected to the neutron moderator array 2 through a second data line and a mechanical interface. The electronic control translation table, the electronic control lifting table and the electronic control rotary table of the motion execution unit 4 drive the neutron moderator array 2 to move.
The neutron energy and current intensity detection unit 5 is connected with the control drive unit 3. As an implementable technical solution, the neutron energy and current intensity detection unit 5 is connected to the control drive unit 3 through a third data line. The neutron detector in the neutron energy and current intensity detection unit 5 detects the energy and current intensity of the neutron beam current in the emergent multi-energy section, and the information is fed back to the control drive unit 3 through the signal output component.
When the neutron moderating device is used, the control driving unit 3 controls and drives the miniaturized neutron source 1 to generate fast neutron beams with set flow intensity and controls the position of the neutron moderating body array 2. The miniaturized neutron source 1 generates fast neutron beams, and the fast neutron beams passing through a proper part of the neutron moderating body array 2 moderate the fast neutron beams generated by the miniaturized neutron source 1 to a set energy section for transmission output. The motion execution unit 4 receives signals of the control driving unit 3, drives the neutron moderating body array 2 to a selected position, receives fast neutron beam incident generated by the miniaturized neutron source 1, and the fast neutron beam is output after being moderated to reach a set energy section, so that a neutron radiation environment is provided. The neutron energy and current intensity detection unit 5 detects the energy and current intensity of the emergent multi-energy-cutoff neutron beam current and feeds back information to the control drive unit 3.
The neutron radiation environment simulation system adopts a miniaturized neutron source including but not limited to a deuterium-tritium neutron tube and the like, and realizes neutron radiation environment simulation with relatively low construction and use cost under a laboratory environment with limited floor space.
In addition, the neutron moderator array is adopted, and the fast neutron beam current generated by the miniaturized neutron source is moderated to a set energy section through a proper moderator by position movement, so that the neutron radiation environment simulation of the multi-energy section is realized at relatively low construction and use cost.
Example 2
Based on the near-earth space multi-energy band neutron radiation environment simulation system provided in embodiment 1, this embodiment provides a near-earth space multi-energy band neutron radiation environment simulation method. The method comprises the steps of controlling a driving unit to control and drive a miniaturized neutron source to generate a fast neutron beam with set flow intensity, controlling a motion execution unit to drive a neutron moderation body array to move to a selected position, receiving the incidence of the fast neutron beam generated by the miniaturized neutron source, and enabling the fast neutron beam to be emitted through moderation to reach a set energy section, so that a neutron radiation environment is provided.
As an optional implementation, the method further comprises: the neutron energy and current intensity detection unit detects the energy and current intensity of the emergent multi-energy-cutoff neutron beam current and feeds information back to the control driving unit.
In the method provided by this embodiment, a miniaturized neutron source provides a fast neutron beam; the neutron moderating body array is used for moderating fast neutron beams generated by the miniaturized neutron source to a set energy section; the control driving unit is used for controlling and driving the miniaturized neutron source to generate a neutron beam with set flow intensity and controlling the position of the neutron moderating body array; the motion execution unit receives the control driving unit signal and drives the neutron moderating body array to move; and the neutron energy and current intensity detection unit is used for detecting the energy and current intensity of the emergent multi-energy broken neutron beam current and feeding back the information to the control driving unit.
This goal is achieved in two processes:
firstly, a miniaturized neutron source including but not limited to a deuterium-tritium neutron tube and the like is adopted, and fast neutron beam output is realized in a laboratory environment with limited floor area.
And secondly, a neutron moderator array is adopted, and the fast neutron beam current generated by the miniaturized neutron source is moderated to a set energy section through a proper moderator by position movement, so that the neutron radiation environment simulation of the multi-energy section is realized at relatively low construction and use cost.
The fast neutron beam energy modulation is realized by a neutron moderating body array, the neutron moderating body array is controlled to move through a control driving unit and is coordinated with the flow intensity output of a miniaturized neutron source, and the fast neutron beam generated by the miniaturized neutron source is moderated to a set flow intensity and energy section through a proper moderating body.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A system for simulating a near-earth space multi-energy band neutron radiation environment, comprising:
the miniaturized neutron source (1) is used for generating a fast neutron beam;
the neutron moderating body array (2) is used for moderating fast neutron beams generated by the miniaturized neutron source (1) to a set energy section;
the control driving unit (3) is used for controlling and driving the miniaturized neutron source (1) to generate a fast neutron beam with set flow intensity and controlling the position of the neutron moderating body array (2);
the motion execution unit (4) is used for receiving the control driving unit signal and driving the neutron moderating body array (2) to move;
and the neutron energy and current intensity detection unit (5) is used for detecting the energy and current intensity of the emitted multi-energy-band neutron beam current and feeding back the information to the control driving unit (3).
2. The system for simulating the neutron radiation environment in the near-earth space multi-energy band according to claim 1, wherein the miniaturized neutron source (1) is a deuterium-tritium neutron tube, a self-sealing neutron tube, or a radioactive isotope neutron source.
3. The system for simulating a near-earth space multi-energy band neutron radiation environment of claim 1, wherein the neutron moderator array (2) is heavy water or polyethylene or lead.
4. The system for simulating a neutron radiation environment in a near-earth space in multiple energy bands according to claim 1, characterized in that the control driving unit (3) comprises a control computer and a high-voltage power supply.
5. The near-earth space multi-energy band neutron radiation environment simulation system according to claim 1, characterized in that the motion execution unit (4) is composed of an electrically controlled translation stage, an electrically controlled lifting stage and an electrically controlled rotary stage.
6. The near-earth space multi-energy band neutron radiation environment simulation system of claim 1, wherein the neutron energy and current intensity detection unit (5) comprises a neutron detector and a signal output component.
7. The near-earth space multi-energy band neutron radiation environment simulation system according to any one of claims 1 to 6, characterized in that the control driving unit (3) is connected with the miniaturized neutron source (1) and the motion execution unit (4) through a first data line, the motion execution unit (4) is connected with the neutron moderating body array (2) through a second data line and a mechanical interface, and the neutron energy and current intensity detection unit (5) is connected with the control driving unit (3) through a third data line.
8. A method for simulating a neutron radiation environment in a near-earth space multi-energy band is characterized by comprising the following steps:
the control driving unit controls and drives the miniaturized neutron source to generate fast neutron beams with set flow intensity, the motion executing unit is controlled to drive the neutron moderating body array to move to a selected position, the fast neutron beams generated by the miniaturized neutron source are received to be incident, the fast neutron beams reach the set energy section through moderation and are emitted, and a neutron radiation environment is provided.
9. The method for simulating a near-earth space multi-energy band neutron radiation environment of claim 6, wherein the method further comprises: the neutron energy and current intensity detection unit detects the energy and current intensity of the emergent multi-energy-cutoff neutron beam current and feeds information back to the control driving unit.
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| CN105118537A (en) * | 2015-08-14 | 2015-12-02 | 西北核技术研究所 | Irradiation experimental device for pulse reactor |
| US20180172608A1 (en) * | 2015-08-06 | 2018-06-21 | Petrochina Company Limited | Method and device for measuring formation elemental capture gamma ray spectra |
| CN110018513A (en) * | 2019-05-16 | 2019-07-16 | 东莞东阳光高能医疗设备有限公司 | A kind of neutron spectrometer of polyhedral structure |
| CN210181231U (en) * | 2019-04-15 | 2020-03-24 | 东莞东阳光高能医疗设备有限公司 | Neutron spectrometer |
| CN111399028A (en) * | 2020-03-19 | 2020-07-10 | 哈尔滨工程大学 | Neutron terminal of multipurpose |
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- 2020-12-03 CN CN202011421503.8A patent/CN112763243A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180172608A1 (en) * | 2015-08-06 | 2018-06-21 | Petrochina Company Limited | Method and device for measuring formation elemental capture gamma ray spectra |
| CN105118537A (en) * | 2015-08-14 | 2015-12-02 | 西北核技术研究所 | Irradiation experimental device for pulse reactor |
| CN210181231U (en) * | 2019-04-15 | 2020-03-24 | 东莞东阳光高能医疗设备有限公司 | Neutron spectrometer |
| CN110018513A (en) * | 2019-05-16 | 2019-07-16 | 东莞东阳光高能医疗设备有限公司 | A kind of neutron spectrometer of polyhedral structure |
| CN111399028A (en) * | 2020-03-19 | 2020-07-10 | 哈尔滨工程大学 | Neutron terminal of multipurpose |
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Application publication date: 20210507 |