CN111443376A - Data extraction method of spatial resolution radiation flow detection technology - Google Patents
Data extraction method of spatial resolution radiation flow detection technology Download PDFInfo
- Publication number
- CN111443376A CN111443376A CN202010273246.1A CN202010273246A CN111443376A CN 111443376 A CN111443376 A CN 111443376A CN 202010273246 A CN202010273246 A CN 202010273246A CN 111443376 A CN111443376 A CN 111443376A
- Authority
- CN
- China
- Prior art keywords
- detector
- radiation source
- radiation
- pinhole
- quasi
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
-
- 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
- G01T1/2914—Measurement of spatial distribution of radiation
-
- 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
- G01T1/2914—Measurement of spatial distribution of radiation
- G01T1/2992—Radioisotope data or image processing not related to a particular imaging system; Off-line processing of pictures, e.g. rescanners
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Theoretical Computer Science (AREA)
- Measurement Of Radiation (AREA)
Abstract
The invention discloses a data extraction method of a spatial resolution radiant flux detection technology. The method calculates the radiation flow intensity by firstly calculating the equivalent quasi-radiation source area of the detector and the equivalent quasi-field opening angle of the detector. The method extracts the data measured by the radiation flow of the local area on the surface of the radiation source through the spatial resolution radiation flow detection technology, and can concisely and strictly and quantitatively give the radiation flow intensity of the relevant area. The method does not need to consider the influence of nonuniform light flux space caused by pinhole imaging on quantitative calculation correctness, and has the calculation process quantities of equivalent quasi-radiation source area of the detector, equivalent quasi-field angle of the detector and the like, so that the method is a necessary reference for reasonably and reliably setting and adjusting the detector in the experimental process, and has practical physical significance in diagnostics. The method has wide and important application prospects in inertial confinement fusion, weapon physics, high-energy density physics and laboratory celestial body physics.
Description
Technical Field
The invention belongs to the field of X-ray measurement, and particularly relates to a data extraction method of a spatial resolution radiation flow detection technology.
Background
Radiation flow measurement is very widely used in inertial confinement fusion, weapons physics, high energy density physics, and laboratory celestial physical scientific research. In the indirect drive inertial confinement fusion ICF, the laser drive black cavity can convert laser energy into near Planck spectrum soft X-rays, and the measured X-rays can be used for deriving radiation temperature, wherein the radiation temperature is one of the most important parameters of a black cavity radiation source and is also the basis for exploring the interaction physical process of the laser and the black cavity. However, spatially resolved detection of X-ray radiation flux in a specific region (non-spot, spot or target) inside the black cavity is an unresolved and important problem in indirect drive ICF experiments. Generally, in the diagnosis of the black cavity, one obtains radiation flow measurements of one or more observation positions including all regions, and the scientific research needs to decouple the measurements and indirectly deduct important information such as radiation temperature, region state and the like of a specific region. The method is different from huge uncertainty caused by indirect measurement technology, and the spatial resolution radiation flow detection technology can directly realize X-ray radiation flow detection with time and spatial resolution at the same time, avoids the influence of extra X-rays generated by laser on the edge of a black cavity injection opening, and has wide application prospect.
The data processing of the existing spatial resolution radiation flow detection technology has the following defects: 1. because the target luminescence is projected onto the detector through the pinhole, and the size of the front limiting aperture of the detector is limited, the luminous flux from the radiation source to the detector is different, which is ignored in the traditional data processing method, so the processing result is not reliable; 2. the data processing method based on the space analysis calculates the luminous flux point by point for the radiation source, the data processing process is complicated, and the physical image of the processing result is fuzzy, complex, not visual and not beneficial to analysis.
Disclosure of Invention
In view of this, the present invention aims to provide a data extraction method for a spatially resolved radiation flux detection technique, which is simple and convenient to calculate, has high reliability and clear physical significance.
In order to achieve the purpose, the invention adopts the following technical scheme:
a data extraction method of a space resolution radiation flow detection technology is characterized by comprising the following steps:
(1) measuring the light transmission area of the spatial resolution pinhole S1;
(2) measuring the light transmission area S2 of the front limiting hole of the detector;
(3) measuring L the distance from the center of the pinhole to the center of the limiting hole;
(4) measuring the distance d from the center of the pinhole to the radiation source;
(5) measuring a signal intensity Y of the detector in response to the radiation flow through the pinhole and through the limiting aperture;
(6) calculating the equivalent quasi-radiation source area to the detector
Equivalent quasi field angle to detector
(7) The intensity of the radiant flux I is calculated,
where R is the detector response.
In a preferred embodiment, step (6) is in particular carried out according to
Calculating the equivalent quasi-radiation source area to the detector based on
Calculating an equivalent quasi-field angle to the detector, where n is the system magnification.
In another preferred embodiment, step (6) is in particular carried out according to
Calculating the equivalent quasi-radiation source area to the detector based on
An equivalent quasi-field angle to the detector is calculated.
Further, the shape of the pinhole is round, oval or irregular.
Further, the radiant flux intensity is the power areal density of the radiation source.
Furthermore, the data extraction method is suitable for any one of inertial confinement fusion research, weapon physical research, high energy density physical research or laboratory celestial body physical research.
Further, the radiation source is a lambertian illuminant.
The data extraction method of the space resolution radiation flow detection technology has the following advantages:
1. the measurement results of the non-uniform light emitting object can be processed.
2. The radiation flow information of different areas can be analyzed quantitatively.
3. The physical image can be simplified, and the analysis of the physical quantity is very intuitive.
The method calculates the radiation flow intensity by firstly calculating the equivalent quasi-radiation source area of the detector and the equivalent quasi-field opening angle of the detector. The method extracts the data measured by the radiation flow of the local area on the surface of the radiation source through the spatial resolution radiation flow detection technology, and can concisely and strictly and quantitatively give the radiation flow intensity of the relevant area. The method does not need to consider the influence of nonuniform light flux space caused by pinhole imaging on quantitative calculation correctness, and has the calculation process quantities of equivalent quasi-radiation source area of the detector, equivalent quasi-field angle of the detector and the like, so that the method is a necessary reference for reasonably and reliably setting and adjusting the detector in the experimental process, and has practical physical significance in diagnostics. The data extraction method of the spatial resolution radiant flux detection technology can realize accurate quantitative analysis of the designated area of the non-uniform radiation source, and has wide and important application prospect in diagnosis and research of radiant flux information of the black body radiation source in inertial confinement fusion, weapon physics, high energy density physics and laboratory celestial body physics.
Drawings
FIG. 1 is a schematic diagram of a radiation source coordinate-acceptance relationship of a data extraction method of a spatially resolved radiation flux detection technique according to the present invention;
FIG. 2 is a schematic diagram of projection coordinates of a data extraction method of a spatially resolved radiation flux detection technique according to the present invention;
FIG. 3 is a diagram illustrating a circular hole of a data extraction method of spatially resolved radiation flux detection according to an embodiment of the present invention;
in the figure, 1, a radiation source type A point 2, a radiation source type B point 3, a radiation source type C point 4, a pinhole face 5, a limiting hole face 6, a detector face 7, an imaginary plane source surface 8, a radiation source surface 9, a surface differential element on the radiation source surface 10 and an imaginary plane source surface.
Detailed Description
The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, and components have not been described in detail so as not to obscure the present invention.
Example 1
The data extraction method of the space resolution radiation flow detection technology comprises the following steps:
(1) measuring the light transmission area of the spatial resolution pinhole S1;
(2) measuring the light transmission area S2 of the front limiting hole of the detector;
(3) measuring L the distance from the center of the pinhole to the center of the limiting hole;
(4) measuring the distance d from the center of the pinhole to the radiation source;
(5) measuring a signal intensity Y of the detector in response to the radiation flow through the pinhole and through the limiting aperture;
(6) calculating the equivalent quasi-radiation source area to the detector
Equivalent quasi field angle to detector
(7) The intensity of the radiant flux I is calculated,
wherein R is the detector response; the radiant flux intensity is the power areal density of the radiation source.
In the data extraction method of the space resolution radiation flow detection technology, the light transmission area S1 of a space resolution pinhole, the light transmission area S2 of a limiting hole on a recording surface (image surface), the distance L from the center of the pinhole to the center of the limiting hole and the distance d from the center of the pinhole to a radiation source can be recorded, measured and guaranteed through mechanical processing by special instruments, the signal intensity Y can be measured by an oscilloscope, and the response R of a detector needs to be calibrated in advance.
The data extraction method of the spatial resolution radiant flux detection technology is applied to diagnosis of radiant flux information of a blackbody radiation source in inertial confinement fusion, weapon physics, high-energy density physics and laboratory celestial body physics.
The pinhole amplifies the radiation source, as shown in fig. 1, the radiation source type a point 1 is used, the light passing through the pinhole is received by the detector part, the radiation source type B point 2 is used, the light passing through the pinhole is received by the detector completely, the radiation source type C point 3 is used, the light passing through the pinhole cannot reach the detector, the flat response XRD selects the required area through the limiting hole for measurement, the size of the area is determined by S1, S2, L and d, the required area comprises the radiation source type a point 1 and the radiation source type B point 2, and the power surface density of the radiation source in the required area is obtained through calculation.
And (3) establishing an arbitrary curved surface coordinate system on the radiation source surface K by taking the intersection point of the extension line of the connecting line from the center of the limiting hole to the center of the pinhole and the radiation source surface as an origin, and expressing the curved surface coordinate of the position of the arbitrary surface differential element by (p, q) and the area of the arbitrary surface differential element by d sigma. A spherical coordinate system is established by taking the surface normal of the surface differential element facing to the direction of the detector as the positive direction of a polar axis, and the spherical coordinate system is used
Indicating the direction of radiation, then
The radiation flow distribution function of the radiation source face is shown. Relative to the surface differential element at (p, q), in spherical coordinates
ψ0(p, q)) represents the detector direction. The signal intensity Y measured by the detector and the radiation flow distribution satisfy the following relation:
wherein R is the detector response; omega (p, q) is the field of view of a curved surface coordinate point (p, q) on the radiation source surface, and a solid angle is formed by the part of the overlapping part of the limiting hole and the pinhole of the detector.
If the radiation source is a lambertian illuminant, the radiation flow is approximately cosine distributed, and the radiation flow intensity, namely the power surface density of the radiation source is as follows:
substituting the formula (2) into the formula (1) to obtain:
since the detector field of view Λ is small, I (p, q) varies little over the range of (p, q) ∈Λ, I (p, q) is approximately independent of (p, q), I (p, q) can be replaced by its mean I within field of view Λ and taken out of the integral to yield:
the intersection point of the extension line of the connecting line from the center of the limiting hole to the center of the pinhole and the radiation source surface is taken as the origin, the central direction of the limiting hole is taken as the normal direction, an imaginary plane source is made, a polar coordinate system is established on the plane, the position coordinates of any surface differential element are expressed by (r, theta), and the area of the arbitrary surface differential element is expressed by d sigma'. Taking some definition of an arbitrary curved coordinate system on the radiation source plane K, so that the (p, q) coordinate point of the radiation source is projected at (r, θ) of the imaginary plane source along the normal direction of the imaginary plane source, therefore, there are:
here, Ω (r, θ) ≈ S (r, θ)/d2And S (r, theta) is the area of the overlapped part of the detector limiting hole and the pinhole, which is positioned at the distance of the pinhole, in the view field of the curved surface coordinate point (r, theta) on the imaginary plane.
In the specific case of a round pin hole and a round restricted hole, as shown in fig. 3, the expression of S (r, θ) can be derived from the expression (7),
where n is the system magnification, R1Is the pinhole radius, R2Limiting the aperture radius for the detector field of view Λ is satisfied in the case of the special case of a circular aperture
Substituting the approximate equation of omega (r, theta) into the integral equation (6) and obtaining the following result:
wherein S1 is the pinhole area, and S2 is the limiting aperture area.
In physical analysis, the relationship between the signal Y recorded by the detector and the radiation flow J is generally assumed to be the following simple equation:
Y＝R·J·∑·Ω (9)
wherein ∑ is the radiation source area, Ω is the field angle of the detector field, analogy between equations (8) and (9) yields the equivalent quasi-radiation source area for the detector
And field angle of quasi-field
The quasi-radiation source area can be defined as the geometric projection range of the limited hole area passing through the center point of the pinhole and on the radiation source, and is as follows:
the equivalent quasi-field angle of view of the detector
Can be defined as the opening angle of the pinhole area directly to the radiation source, i.e.:
the radiant flux intensity is then obtained from equation (8):
further, the shape of the pinhole is round, oval or irregular.
Further, the radiant flux intensity is the power areal density of the radiation source.
Furthermore, the data extraction method is suitable for any one of inertial confinement fusion research, weapon physical research, high energy density physical research or laboratory celestial body physical research.
Further, the radiation source is a lambertian illuminant.
Example 2
The present embodiment is different from embodiment 1 in that the definition of the quasi radiation source area and the quasi field angle equivalent to the detector in the present embodiment is physically different from embodiment 1.
In this embodiment, the quasi-radiation source area equivalent to the detector
The size of the pinhole area can be considered as:
the equivalent quasi-field opening angle of the detector can be regarded as the opening angle of the hole limiting area directly facing the pinhole
Namely:
where L nd is the distance from the center of the pinhole to the center of the limiting hole.
The formula for calculating the radiant flux intensity is the same as the formula (12).
The foregoing embodiments are merely provided as an aid to understanding the principles of the invention and it is to be understood that the scope of the invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific changes and combinations based on the teachings of the present invention without departing from the spirit of the invention, and these changes and combinations are within the scope of the invention.
Claims (6)
1. A data extraction method for spatially resolved radiation flux detection, the method comprising the steps of:
(1) measuring the light transmission area of the spatial resolution pinhole S1;
(2) measuring the light transmission area S2 of the front limiting hole of the detector;
(3) measuring L the distance from the center of the pinhole to the center of the limiting hole;
(4) measuring the distance d from the center of the pinhole to the radiation source;
(5) measuring a signal intensity Y of the detector in response to the radiation flow through the pinhole and through the limiting aperture;
(6) calculating the equivalent quasi-radiation source area to the detector
Equivalent quasi field angle to detector
(7) The intensity of the radiant flux I is calculated,
where R is the detector response.
2. The method for data extraction according to claim 1, wherein the step (6) is based on
Calculating the equivalent quasi-radiation source area to the detector based on
Calculating an equivalent quasi-field angle to the detector, where n is the system magnification.
3. The method for data extraction according to claim 1, wherein the step (6) is based on
Calculating the equivalent quasi-radiation source area to the detector based on
An equivalent quasi-field angle to the detector is calculated.
4. The method of claim 1, wherein the pinhole is circular, elliptical or irregular in shape.
5. The method of claim 1, wherein the method is suitable for any one of inertial confinement fusion research, weapons physics research, high energy density physics research, or laboratory celestial body physics research.
6. The method of claim 1, wherein the radiation source is a lambertian illuminant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010273246.1A CN111443376B (en) | 2020-04-09 | 2020-04-09 | Data extraction method of spatial resolution radiation flow detection technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010273246.1A CN111443376B (en) | 2020-04-09 | 2020-04-09 | Data extraction method of spatial resolution radiation flow detection technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111443376A true CN111443376A (en) | 2020-07-24 |
| CN111443376B CN111443376B (en) | 2022-03-29 |
Family
ID=71651345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010273246.1A Active CN111443376B (en) | 2020-04-09 | 2020-04-09 | Data extraction method of spatial resolution radiation flow detection technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111443376B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114859392A (en) * | 2022-03-24 | 2022-08-05 | 西北核技术研究所 | System and method for measuring soft X-ray energy fluence by utilizing pinhole array |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6727502B1 (en) * | 2001-06-27 | 2004-04-27 | Koninklijke Philips Electronics, N.V. | Calibration technique for coincidence imaging systems |
| US20040251419A1 (en) * | 2003-06-16 | 2004-12-16 | Nelson Robert Sigurd | Device and system for enhanced SPECT, PET, and Compton scatter imaging in nuclear medicine |
| CN105158789A (en) * | 2015-09-11 | 2015-12-16 | 中国工程物理研究院激光聚变研究中心 | Spatial distinguishing radiant flux detection apparatus |
| CN105204059A (en) * | 2015-09-11 | 2015-12-30 | 中国工程物理研究院激光聚变研究中心 | Device and method for quantitative measurement of soft X-ray radiant flows in local area |
| CN106526649A (en) * | 2016-09-28 | 2017-03-22 | 北京空间机电研究所 | Calibration system and calibration method for radiation intensity of soft X-ray source |
| CN106526654A (en) * | 2017-01-09 | 2017-03-22 | 中国工程物理研究院激光聚变研究中心 | Temporal-spatial resolution radiant flux diagnosis system |
| CN107728191A (en) * | 2017-11-22 | 2018-02-23 | 中国工程物理研究院激光聚变研究中心 | A kind of four-way spatial localization X-ray radiation stream diagnostic device |
| CN108169790A (en) * | 2017-11-27 | 2018-06-15 | 同济大学 | A kind of microscopical intensity calibration method of Grazing Incidence X-Ray |
| CN109444947A (en) * | 2019-01-08 | 2019-03-08 | 中国工程物理研究院激光聚变研究中心 | A kind of X-ray radiation stream diagnostic system |
| CN209784551U (en) * | 2019-05-06 | 2019-12-13 | 中国工程物理研究院激光聚变研究中心 | High-space-time resolution soft X-ray radiation flow quantitative measurement system |
-
2020
- 2020-04-09 CN CN202010273246.1A patent/CN111443376B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6727502B1 (en) * | 2001-06-27 | 2004-04-27 | Koninklijke Philips Electronics, N.V. | Calibration technique for coincidence imaging systems |
| US20040251419A1 (en) * | 2003-06-16 | 2004-12-16 | Nelson Robert Sigurd | Device and system for enhanced SPECT, PET, and Compton scatter imaging in nuclear medicine |
| CN105158789A (en) * | 2015-09-11 | 2015-12-16 | 中国工程物理研究院激光聚变研究中心 | Spatial distinguishing radiant flux detection apparatus |
| CN105204059A (en) * | 2015-09-11 | 2015-12-30 | 中国工程物理研究院激光聚变研究中心 | Device and method for quantitative measurement of soft X-ray radiant flows in local area |
| CN106526649A (en) * | 2016-09-28 | 2017-03-22 | 北京空间机电研究所 | Calibration system and calibration method for radiation intensity of soft X-ray source |
| CN106526654A (en) * | 2017-01-09 | 2017-03-22 | 中国工程物理研究院激光聚变研究中心 | Temporal-spatial resolution radiant flux diagnosis system |
| CN107728191A (en) * | 2017-11-22 | 2018-02-23 | 中国工程物理研究院激光聚变研究中心 | A kind of four-way spatial localization X-ray radiation stream diagnostic device |
| CN108169790A (en) * | 2017-11-27 | 2018-06-15 | 同济大学 | A kind of microscopical intensity calibration method of Grazing Incidence X-Ray |
| CN109444947A (en) * | 2019-01-08 | 2019-03-08 | 中国工程物理研究院激光聚变研究中心 | A kind of X-ray radiation stream diagnostic system |
| CN209784551U (en) * | 2019-05-06 | 2019-12-13 | 中国工程物理研究院激光聚变研究中心 | High-space-time resolution soft X-ray radiation flow quantitative measurement system |
Non-Patent Citations (2)
| Title |
|---|
| KUAN REN: "Direct measurement of x-ray flux for a pre-specified highly-resolved region in hohlraum", 《OPTICS EXPRESS》 * |
| 余波: "单端驱动银球腔的激光能量耦合和分配", 《物理学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114859392A (en) * | 2022-03-24 | 2022-08-05 | 西北核技术研究所 | System and method for measuring soft X-ray energy fluence by utilizing pinhole array |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111443376B (en) | 2022-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Birkinshaw | The sunyaev–zel’dovich effect | |
| Sugerman et al. | The three-dimensional circumstellar environment of SN 1987A | |
| CN105158789A (en) | Spatial distinguishing radiant flux detection apparatus | |
| CN109655161B (en) | Target infrared integral radiation intensity testing method and device based on thermal infrared imager | |
| CN114323571B (en) | Multi-optical-axis consistency detection method for photoelectric aiming system | |
| CN111678608A (en) | High-precision cavity infrared emissivity measuring system and measuring method | |
| CN106706132B (en) | Infrared detection device and method for identifying targets in sea surface sun bright band | |
| CN111122002B (en) | Long air gap discharge channel temperature field measurement system and identification method | |
| CN111443376B (en) | Data extraction method of spatial resolution radiation flow detection technology | |
| CN110514392A (en) | Temperature deformation measuring system and method based on wide-angle lens and image distortion correction | |
| CN111289496A (en) | Detection method and device for long-distance zoom laser-induced breakdown spectroscopy | |
| CN106707327A (en) | X-ray imaging device aiming device and adjustment and calibration method and application method thereof | |
| CN106706157A (en) | Quasi-concentric visual axis-based ICF (inertial confinement fusion) hot spot electronic temperature detection device | |
| CN108426700A (en) | A kind of gravity is directed toward camera lens optical axis the detection method of influence | |
| TWI757795B (en) | Methods for maintaining gap spacing between an optical probe of a probe system and an optical device of a device under test, and probe systems that perform the methods | |
| CN105716720A (en) | Infrared image heterogeneity correction method and device | |
| CN105509900B (en) | Infrared radiometer response curve caliberating device and method | |
| CN107085233B (en) | Local radiation flow measurement system based on precise pinhole | |
| CN110617887B (en) | Target radiance measuring method and device | |
| Lee-Waddell et al. | The host galaxy of FRB 20171020A revisited | |
| CN111579090A (en) | Miniaturized high-precision infrared area array temperature measurement thermal imager | |
| CN116046179B (en) | Non-contact temperature measurement and calibration method in plasma thruster operation environment | |
| Li | Space target optical characteristics and SNR calculation model on sky screen | |
| US10908104B2 (en) | Radiation analysis apparatus | |
| CN204989494U (en) | Radiant flux detection equipment is distinguishd in space |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |