CN119781000B - In-situ measurement method and device for X-ray radiation flow of incident ICF (information and communication technology) target pill - Google Patents
In-situ measurement method and device for X-ray radiation flow of incident ICF (information and communication technology) target pill Download PDFInfo
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Abstract
The invention discloses an in-situ measurement method and device for an X-ray radiation flow of an incident ICF target pill, the method comprises the following steps of emitting a laser beam into a preset ICF black cavity, irradiating the laser beam on the inner wall of the preset ICF black cavity to form a light spot area, determining that the area except the light spot area on the inner wall of the preset ICF black cavity is a non-light spot area, respectively measuring the X-ray radiation flows of the light spot area and the non-light spot area, constructing a black cavity-target pill model according to the preset ICF black cavity and the ICF target pill, and obtaining 4 incident to the ICF target pill according to the black cavity-target pill model, the light spot radiation flow and the non-light spot radiation flowA spatial X-ray radiation flow distribution. The invention can realize the 4-degree incidence of the ICF target pillIn-situ measurement of the spatial X-ray radiation flux distribution improves the experimental measurement capability of the X-ray radiation flux.
Description
Technical Field
The invention relates to the field of X-ray radiation flow detection, in particular to an in-situ measurement method and device for an incident ICF target pill X-ray radiation flow.
Background
Indirectly driving laser inertial confinement fusion ICF (Inertial Confinement Fusion) converts laser into X rays by injecting the X rays into a high-Z material black cavity, and drives the target pill to realize implosion compression by injecting the X rays onto the surface of a nuclear fusion target pill positioned in the center of the black cavity, so as to generate nuclear fusion, and the controlled nuclear fusion is expected to solve the human energy problem and has important significance for national defense and military.
However, to date, the 4 pi spatial X-ray radiation flux distribution (i.e., the distribution of time-varying X-ray intensities in three dimensions) of incident nuclear fusion target pellets has not been directly measured in situ. The method for measuring the radiation flux of the target pill comprises the steps of adopting an indirect measurement mode, namely, experimentally measuring the X-ray radiation flux sprayed from a black cavity wall through an injection opening from a certain angle, comparing the X-ray radiation flux with a numerical simulation result of the radiation flux of the target pill, and taking the closest experimental measurement result as the radiation flux of the target pill.
The existing method has the following defects that 1, the X-ray radiation flow measured through a black cavity injection opening is influenced by the shrinkage cavity effect of the injection opening, the accuracy is reduced, 2, the X-ray radiation flow which is experimentally measured from a certain angle and is sprayed through the injection opening on the wall of the black cavity is difficult to be exactly equal to the X-ray radiation flow of an incident target pill, 3, the radiation flow of the incident target pill obtained through numerical simulation is overestimated by about 15 percent, which is proved by the related literature, namely the energy loss is proved, 4, only the X-ray radiation flow which is at a certain angle and is not obtained yet, the incident target pill 4A spatial X-ray radiation flow distribution.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an in-situ measurement method and an in-situ measurement device for the X-ray radiation flow of an incident ICF target pill, which can realize the X-ray radiation flow 4 of the incident ICF target pillIn-situ measurement of the spatial distribution improves the experimental measurement capability of the X-ray radiation flow.
An embodiment of the present invention provides an in situ measurement method of an incident ICF target pellet X-ray radiation stream, comprising the steps of:
Emitting a laser beam into a preset ICF black cavity, wherein the laser beam irradiates on the inner wall of the preset ICF black cavity to form a light spot area, and determining the area except the light spot area on the inner wall of the preset ICF black cavity as a non-light spot area;
measuring the X-ray radiation flows of the facula area and the non-facula area respectively, and correspondingly obtaining facula radiation flows and non-facula radiation flows;
Constructing a black cavity-target pill model according to the preset ICF black cavity and the ICF target pill, and obtaining 4 incident to the ICF target pill according to the black cavity-target pill model, the light spot radiation flow and the non-light spot radiation flow And the ICF target pill is positioned in the preset ICF black cavity.
Further, the emitting a laser beam into the preset ICF black cavity, where the laser beam irradiates on the inner wall of the preset ICF black cavity to form a light spot area, specifically includes:
The surface of the preset ICF black cavity is provided with a plurality of injection openings, the laser beams respectively enter the preset ICF black cavity from the injection openings, and a plurality of light spot areas are formed on the inner wall of the preset ICF black cavity.
Further, the measuring the X-ray radiation flows of the light spot area and the non-light spot area respectively specifically includes:
the X-ray radiation flows in the facula area and the non-facula area are measured respectively through two sets of preset space resolution radiation flow detection equipment, wherein the preset space resolution radiation flow detection equipment is equipment for realizing space resolution detection on the X-ray radiation flow emitted by the small micro-radiation source based on pinhole imaging and hole limiting and area selection principles, and the field of view of the preset space resolution radiation flow detection equipment is not more than a preset field of view threshold value.
Further, the construction of the black cavity-target pill model according to the preset ICF black cavity and the ICF target pill specifically comprises the following steps:
Constructing a black cavity model with the same structure and size as those of the preset ICF black cavity according to the preset ICF black cavity and the light spot area, wherein a target pill model with the same structure and size as those of the ICF target pill is further arranged in the inner center of the black cavity model, and the black cavity model and the target pill model form the black cavity-target pill model;
According to the size and the position of the light spot area, setting a simulated light spot area and a simulated non-light spot area on the inner wall of the black cavity model, and respectively assigning the light spot radiation flow and the non-light spot radiation flow to the simulated light spot area and the simulated non-light spot area;
Dividing the inner wall of the black cavity model and the surface of the target pill model into a plurality of small cells respectively, and correspondingly obtaining a black cavity small cell and a target pill small cell, wherein the black cavity small cell comprises a facula area small cell and a non-facula area small cell.
Preferably, the method includes dividing the inner wall of the black cavity model and the surface of the target pill model into a plurality of small cells, and correspondingly obtaining the black cavity small cells and the target pill small cells, specifically including:
dividing the inner wall of the preset ICF black cavity into a plurality of black cavity small cells, wherein the black cavity small cells positioned on the simulated light spot area are the light spot area small cells, and the black cavity small cells positioned on the simulated non-light spot area are the non-light spot area small cells;
Dividing the surface of the target pill model into a plurality of target pill small cells, wherein the areas of the plurality of target pill small cells are equal;
And respectively connecting the centers of the plurality of black cavity cells and the target pellet cells to obtain a plurality of cell connecting lines, and determining that a corresponding relation exists between the target pellet cells and the black cavity cells through which the cell connecting lines pass, wherein one target pellet cell corresponds to the plurality of black cavity cells.
Further, the method calculates 4 incident to the ICF target pill according to the black cavity-target pill model, the light spot radiation flow and the non-light spot radiation flowThe spatial X-ray radiation flow distribution specifically comprises:
According to the light spot radiation flows and the light spot area small cells corresponding to the target pill small cells, calculating X-ray radiation flows which come from the simulated light spot areas and are incident on the target pill small cells, and obtaining light spot radiation flows corresponding to the target pill small cells;
according to the non-facula radiation flow and the non-facula area small cells corresponding to the target pill small cells, calculating the X-ray radiation flow which comes from the simulated non-facula area and is incident on the target pill small cells to obtain the non-facula radiation flow corresponding to the target pill small cells;
summing according to the light spot radiation flow corresponding to each target pellet small cell and the non-light spot radiation flow corresponding to the target pellet small cell to obtain 4 incident to the ICF target pellet A spatial X-ray radiation flow distribution.
Preferably, the calculating, according to the spot radiation flow and the spot area small cells corresponding to the target pill small cells, the X-ray radiation flow coming from the simulated spot area and incident on the target pill small cells specifically includes:
According to the facula radiation flow, the quantity and the area of the facula area small cells corresponding to the target pill small cells and the area of the target pill small cells, calculating to obtain the facula radiation flow corresponding to the target pill small cells, wherein the specific calculation formula is as follows:
Wherein, For the corresponding spot radiation flow of the target pill facet element,To correspond to the number of spot area bins to the target pill bins,For the radiation stream of the spot,For the area of the x-th light spot area cell corresponding to the target pill cell,For the area of the target pellet bin,The specific calculation formula of the preset light spot visual factor is as follows:
Wherein, Is the included angle between the normal line of the facula area small cell corresponding to the target pill small cell and the connecting line of the facula area small cell corresponding to the target pill small cell and the target pill small cell,For the normal line of the target pellet small cell and the included angle between the x-th light spot area small cell corresponding to the target pellet small cell and the connecting line of the target pellet small cell,And the length of the connecting line of the facula area small cell and the target pill small cell, which corresponds to the target pill small cell, is the x-th length.
Preferably, the calculating, according to the non-facula radiation flow and the non-facula area cells corresponding to each target pellet cell, the X-ray radiation flow from the simulated non-facula area and incident on each target pellet cell specifically includes:
according to the non-facula radiation flow, the number and the area of the non-facula area cells corresponding to the target pill cells and the area of the target pill cells, calculating to obtain the non-facula radiation flow corresponding to the target pill cells, wherein the specific calculation formula is as follows:
Wherein, For the corresponding non-spot radiation flow of the target pill facet element,To correspond to the number of non-spot area bins to the target pill bins,For the non-spot radiation stream,For the area of the z-th non-spot area facet corresponding to the target pill facet,For the area of the target pellet bin,The specific calculation formula of the preset non-facula visual factor is as follows:
Wherein, Is the included angle between the normal line of the non-facula area small cell corresponding to the target pill small cell and the connecting line of the non-facula area small cell corresponding to the target pill small cell and the target pill small cell,For the normal line of the target pill small cell and the included angle between the z-th non-facula small cell corresponding to the target pill small cell and the connecting line of the target pill small cell,And the length of the connecting line of the non-facula area small cell and the target pill small cell corresponding to the z-th target pill small cell is the length of the connecting line of the non-facula area small cell and the target pill small cell.
Further, the method sums the light spot radiation flow corresponding to each target pellet small cell and the non-light spot radiation flow corresponding to the target pellet small cell to obtain 4 incident to the ICF target pelletThe spatial X-ray radiation flow distribution is specified as a summation formula:
Wherein, 4 To be incident on the ICF target pelletThe spatial X-ray radiation flux distribution,Ordinal numbers of the target pellet bins,Is the firstSpot radiation flows corresponding to the target pill facet elements,Is the firstAnd a non-facula radiation flow corresponding to each target pill facet element.
The invention provides an in-situ measurement device of an incident ICF target pill X-ray radiation flow, which comprises an emission module, a measurement module and a calculation module;
The emission module is used for emitting laser beams into a preset ICF black cavity, the laser beams irradiate the inner wall of the preset ICF black cavity to form a light spot area, and the area, except the light spot area, on the inner wall of the preset ICF black cavity is determined to be a non-light spot area;
the measuring module is used for measuring the X-ray radiation flows of the light spot area and the non-light spot area respectively, and correspondingly obtaining light spot radiation flows and non-light spot radiation flows;
The calculation module is used for constructing a black cavity-target pill model according to the preset ICF black cavity and the ICF target pill, and obtaining 4 incident to the ICF target pill according to the black cavity-target pill model, the facula radiation flow and the non-facula radiation flow And the ICF target pill is positioned in the preset ICF black cavity.
Compared with the prior art, the invention has the beneficial effects that:
By measuring X-ray radiation flows in a facula area and a non-facula area in the black cavity respectively, a model consistent with an experimental black cavity-target pill is established, and a researcher can directly and in-situ measure 4 of an incident ICF target pill through radiation flow and lambertian emission property assignment The space X-ray radiation flow distribution avoids the influence of shrinkage cavity effect, improves the experimental measurement capability of the X-ray radiation flow, and has very important and wide application prospect in indirect drive implosion experiments of various black cavity targets of ICF.
Drawings
Fig. 1 is a flow chart of an in-situ measurement method of an X-ray radiation flow of an incident ICF target pellet according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a black cavity-target pellet model according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an in-situ measurement device for X-ray radiation flow of an incident ICF target pellet according to another embodiment of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
It will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
Referring to fig. 1, a schematic flow chart of an in-situ measurement method of an X-ray radiation flow of an incident ICF target pellet according to an embodiment of the present invention includes the following steps:
S1, emitting a laser beam into a preset ICF black cavity, wherein the laser beam irradiates the inner wall of the preset ICF black cavity to form a light spot area, and determining the area except the light spot area on the inner wall of the preset ICF black cavity as a non-light spot area;
s2, measuring X-ray radiation flows in the facula area and the non-facula area respectively, and correspondingly obtaining facula radiation flows and non-facula radiation flows;
S3, constructing a black cavity-target pill model according to the preset ICF black cavity and the ICF target pill, and obtaining 4 incident to the ICF target pill according to the black cavity-target pill model, the light spot radiation flow and the non-light spot radiation flow And the ICF target pill is positioned in the preset ICF black cavity.
For step S1, specifically, the emitting an X-ray laser beam to the ICF target pill in the preset ICF black cavity, where the X-ray laser beam forms a light spot area on an inner wall of the preset ICF black cavity after being reflected, specifically includes:
The surface of the preset ICF black cavity is provided with a plurality of injection openings, and the X-ray laser beams respectively enter the inside of the preset ICF black cavity from the plurality of injection openings and form a plurality of light spot areas on the inner wall of the preset ICF black cavity after being reflected by the ICF target pills.
In a preferred embodiment, the preset ICF black cavity is one of six-hole ball cavities, column cavities, six-way column cavities and other black cavities commonly used in indirect driving ICF implosion experiments. In the preferred embodiment, a six-hole sphere cavity is selected as the preset ICF black cavity.
And a plurality of X-ray laser beams enter the preset ICF black cavity from six injection ports on the surface of the preset ICF black cavity respectively, after being reflected by the ICF target pill, a plurality of light spot areas are formed on the inner wall of the preset ICF black cavity, and then other areas on the inner wall of the preset ICF black cavity are non-light spot areas.
For step S2, specifically, the measuring X-ray radiation flows in the spot area and the non-spot area respectively, and correspondingly obtaining a spot radiation flow and a non-spot radiation flow specifically includes:
the X-ray radiation flows in the facula area and the non-facula area are measured respectively through two sets of preset space resolution radiation flow detection equipment, wherein the preset space resolution radiation flow detection equipment is equipment for realizing space resolution detection on the X-ray radiation flow emitted by the small micro-radiation source based on pinhole imaging and hole limiting and area selection principles, and the field of view of the preset space resolution radiation flow detection equipment is not more than a preset field of view threshold value.
In a preferred embodiment, the spot radiation stream and the non-spot radiation stream are obtained by measuring X-ray radiation streams in the spot area and the non-spot area simultaneously by two sets of the predetermined spatially resolved radiation stream detection apparatus, respectively, in units of W/cm 2.
In the preferred embodiment, the fields of view of the two sets of the preset spatially resolved radiation flux detection devices are 200um, which is significantly smaller than the size of the normal black cavity injection port above 800 um. Therefore, the shrinkage cavity effect of the black cavity injection opening can be avoided, numerical simulation is not needed in subsequent measurement, no energy loss phenomenon exists, and the measurement efficiency of X-ray radiation flow is improved.
For step S3, specifically, the constructing a black cavity-target pill model according to the preset ICF black cavity and the ICF target pill specifically includes:
Constructing a black cavity model with the same structure and size as those of the preset ICF black cavity according to the preset ICF black cavity and the light spot area, wherein a target pill model with the same structure and size as those of the ICF target pill is further arranged in the inner center of the black cavity model, and the black cavity model and the target pill model form the black cavity-target pill model;
According to the size and the position of the light spot area, setting a simulated light spot area and a simulated non-light spot area on the inner wall of the black cavity model, and respectively assigning the light spot radiation flow and the non-light spot radiation flow to the simulated light spot area and the simulated non-light spot area;
Dividing the inner wall of the black cavity model and the surface of the target pill model into a plurality of small cells respectively, and correspondingly obtaining a black cavity small cell and a target pill small cell, wherein the black cavity small cell comprises a facula area small cell and a non-facula area small cell.
Preferably, the method includes dividing the inner wall of the black cavity model and the surface of the target pill model into a plurality of small cells, and correspondingly obtaining the black cavity small cells and the target pill small cells, specifically including:
dividing the inner wall of the preset ICF black cavity into a plurality of black cavity small cells, wherein the black cavity small cells positioned on the simulated light spot area are the light spot area small cells, and the black cavity small cells positioned on the simulated non-light spot area are the non-light spot area small cells;
Dividing the surface of the target pill model into a plurality of target pill small cells, wherein the areas of the plurality of target pill small cells are equal;
And respectively connecting the plurality of black cavity cells with the centers of the target pellet cells to obtain a plurality of cell connecting lines, and determining that a corresponding relation exists between the target pellet cells through which the cell connecting lines pass and the black cavity cells corresponding to the cell connecting lines, wherein one target pellet cell corresponds to the plurality of black cavity cells.
In a preferred embodiment, after measuring the spot radiation flow and the non-spot radiation flow, a black cavity-target pellet model corresponding to the preset ICF black cavity used for the experiment needs to be constructed. Referring to fig. 2, a schematic structure of a black cavity-target pellet model according to an embodiment of the present invention is shown.
As can be seen from fig. 2, the structure and the size of the black cavity-target pellet model are the same as those of the preset ICF black cavity, and a target pellet model with the same structure and the same size as those of the ICF target pellet is also built in the black cavity-target pellet model. Meanwhile, according to the corresponding position of the facula area on the inner wall of the preset ICF black cavity, a corresponding simulated facula area and a corresponding simulated non-facula area are also arranged on the inner wall of the black cavity-target pill model, and the facula radiation flow and the non-facula radiation flow which are obtained through measurement are also assigned to the simulated facula area and the simulated non-facula area. In addition, the black cavity-target pellet model is also endowed with lambertian emission properties.
After the black cavity-target pill model and the target pill model are constructed, the inner wall of the black cavity-target pill model and the surface of the target pill model are further required to be divided, and the spherical cavity small cells and the target pill small cells are correspondingly obtained. The areas of the target pill small cells are equal, but the areas of the ball cavity small cells are not necessarily equal, and the adjustment can be carried out according to actual conditions. After dividing the cells, the correspondence between each spherical cavity cell and each target pellet cell needs to be established so as to calculate the X-ray radiation flow incident on each target pellet cell subsequently.
For step S3, further, the method calculates 4 incident on the ICF target pellet according to the black cavity-target pellet model, the spot radiation flow and the non-spot radiation flowThe spatial X-ray radiation flow distribution specifically comprises:
According to the light spot radiation flows and the light spot area small cells corresponding to the target pill small cells, calculating X-ray radiation flows which come from the simulated light spot areas and are incident on the target pill small cells, and obtaining light spot radiation flows corresponding to the target pill small cells;
according to the non-facula radiation flow and the non-facula area small cells corresponding to the target pill small cells, calculating the X-ray radiation flow which comes from the simulated non-facula area and is incident on the target pill small cells to obtain the non-facula radiation flow corresponding to the target pill small cells;
calculating to obtain 4 incident to the ICF target pill according to the facula radiation flow and the non-facula radiation flow corresponding to each target pill small cell A spatial X-ray radiation flow distribution.
The method comprises the steps of calculating the X-ray radiation flow which comes from the simulated light spot area and is incident on each target pellet cell according to the light spot radiation flow and the light spot area cell corresponding to each target pellet cell, and specifically comprises the following steps:
According to the facula radiation flow, the quantity and the area of the facula area small cells corresponding to the target pill small cells and the area of the target pill small cells, calculating to obtain the facula radiation flow corresponding to the target pill small cells, wherein the specific calculation formula is as follows:
Wherein, For the corresponding spot radiation flow of the target pill facet element,To correspond to the number of spot area bins to the target pill bins,For the radiation stream of the spot,For the area of the x-th light spot area cell corresponding to the target pill cell,For the area of the target pellet bin,The specific calculation formula of the preset light spot visual factor is as follows:
Wherein, Is the included angle between the normal line of the facula area small cell corresponding to the target pill small cell and the connecting line of the facula area small cell corresponding to the target pill small cell and the target pill small cell,For the normal line of the target pellet small cell and the included angle between the x-th light spot area small cell corresponding to the target pellet small cell and the connecting line of the target pellet small cell,And the length of the connecting line of the facula area small cell and the target pill small cell, which corresponds to the target pill small cell, is the x-th length.
Preferably, the calculating, according to the non-facula radiation flow and the non-facula area cells corresponding to each target pellet cell, the X-ray radiation flow from the simulated non-facula area and incident on each target pellet cell specifically includes:
according to the non-facula radiation flow, the number and the area of the non-facula area cells corresponding to the target pill cells and the area of the target pill cells, calculating to obtain the non-facula radiation flow corresponding to the target pill cells, wherein the specific calculation formula is as follows:
Wherein, For the corresponding non-spot radiation flow of the target pill facet element,To correspond to the number of non-spot area bins to the target pill bins,For the non-spot radiation stream,For the area of the z-th non-spot area facet corresponding to the target pill facet,For the area of the target pellet bin,The specific calculation formula of the preset non-facula visual factor is as follows:
Wherein, Is the included angle between the normal line of the non-facula area small cell corresponding to the target pill small cell and the connecting line of the non-facula area small cell corresponding to the target pill small cell and the target pill small cell,For the normal line of the target pill small cell and the included angle between the z-th non-facula small cell corresponding to the target pill small cell and the connecting line of the target pill small cell,And the length of the connecting line of the non-facula area small cell and the target pill small cell corresponding to the z-th target pill small cell is the length of the connecting line of the non-facula area small cell and the target pill small cell.
Further, the method sums the light spot radiation flow corresponding to each target pellet small cell and the non-light spot radiation flow corresponding to the target pellet small cell to obtain 4 incident to the ICF target pelletThe spatial X-ray radiation flow distribution is specified as a summation formula:
Wherein, 4 To be incident on the ICF target pelletThe spatial X-ray radiation flux distribution,Ordinal numbers of the target pellet bins,Is the firstSpot radiation flows corresponding to the target pill facet elements,Is the firstAnd a non-facula radiation flow corresponding to each target pill facet element.
In a preferred embodiment, the spot radiation flow and the non-spot radiation flow corresponding to each target pellet cell are calculated based on a visual factor, and then the spot radiation flow and the non-spot radiation flow corresponding to all target pellet cells are summed to obtain the total X-ray radiation flow incident to the ICF target pellet.
The in-situ measurement method of the X-ray radiation flow of the incident ICF target pill provided by the embodiment of the invention can ensure that the uncertainty of the total X-ray radiation flow obtained by measurement is less than 13%, and the measurement efficiency is obviously superior to that of an indirect measurement method in the prior art. The method realizes the direct in-situ measurement of the X-ray radiation flow of the incident ICF target pill, has accurate and reliable measurement results, does not change the structures of the black cavity and the target pill, solves the detection problem of the radiation flow of the incident target pill, which puzzles over 70 years in the ICF field, and has very important and wide application prospect in the indirect drive implosion experiments of various targets of ICF.
Referring to FIG. 3, a schematic structural diagram of an in-situ measurement device for X-ray radiation flow of an incident ICF target pill according to another embodiment of the present invention includes an emission module 101, a measurement module 102 and a calculation module 103;
The emission module 101 is configured to emit a laser beam into a preset ICF black cavity, where the laser beam irradiates an inner wall of the preset ICF black cavity to form a light spot area, and determine that an area except the light spot area on the inner wall of the preset ICF black cavity is a non-light spot area;
the measurement module 102 is configured to measure X-ray radiation flows in the spot area and the non-spot area, respectively, to obtain a spot radiation flow and a non-spot radiation flow correspondingly;
the calculation module 103 is configured to construct a black cavity-target pill model according to the preset ICF black cavity and the ICF target pill, and obtain 4 incident to the ICF target pill according to the black cavity-target pill model, the spot radiation flow and the non-spot radiation flow And the ICF target pill is positioned in the preset ICF black cavity.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (8)
1. An in situ measurement method of an X-ray radiation stream of an incident ICF target pellet, comprising the steps of:
Emitting a laser beam into a preset ICF black cavity, wherein the laser beam irradiates on the inner wall of the preset ICF black cavity to form a light spot area, and determining the area except the light spot area on the inner wall of the preset ICF black cavity as a non-light spot area;
measuring the X-ray radiation flows of the facula area and the non-facula area respectively, and correspondingly obtaining facula radiation flows and non-facula radiation flows;
Constructing a black cavity-target pill model according to the preset ICF black cavity and the ICF target pill, and obtaining 4 incident to the ICF target pill according to the black cavity-target pill model, the light spot radiation flow and the non-light spot radiation flow The ICF target pill is positioned in the preset ICF black cavity;
the construction of the black cavity-target pill model according to the preset ICF black cavity and the ICF target pill specifically comprises the following steps:
Constructing a black cavity model with the same structure and size as those of the preset ICF black cavity according to the preset ICF black cavity and the light spot area, wherein a target pill model with the same structure and size as those of the ICF target pill is further arranged in the inner center of the black cavity model, and the black cavity model and the target pill model form the black cavity-target pill model;
According to the size and the position of the light spot area, setting a simulated light spot area and a simulated non-light spot area on the inner wall of the black cavity model, and respectively assigning the light spot radiation flow and the non-light spot radiation flow to the simulated light spot area and the simulated non-light spot area;
Dividing the inner wall of the black cavity model and the surface of the target pill model into a plurality of small cells respectively, and correspondingly obtaining a black cavity small cell and a target pill small cell, wherein the black cavity small cell comprises a facula area small cell and a non-facula area small cell, and one target pill small cell corresponds to a plurality of black cavity small cells;
calculating to obtain 4 incident to the ICF target pill according to the black cavity-target pill model, the light spot radiation flow and the non-light spot radiation flow The spatial X-ray radiation flow distribution specifically comprises:
According to the facula radiation flow and the facula area small cells corresponding to the target pill small cells, calculating the X-ray radiation flow which comes from the simulated facula area and is incident on the target pill small cells to obtain the facula radiation flow corresponding to the target pill small cells, wherein the specific steps are as follows:
According to the facula radiation flow, the quantity and the area of the facula area small cells corresponding to the target pill small cells and the area of the target pill small cells, calculating to obtain the facula radiation flow corresponding to the target pill small cells, wherein the specific calculation formula is as follows:
Wherein, For the corresponding spot radiation flow of the target pill facet element,Ordinal numbers of the target pellet bins,To correspond to the number of spot area bins to the target pill bins,For the radiation stream of the spot,For the area of the x-th light spot area cell corresponding to the target pill cell,For the area of the target pellet bin,Is a preset facula visual factor;
According to the non-facula radiation flow and the non-facula area small cells corresponding to the target pill small cells, calculating the X-ray radiation flow which comes from the simulated non-facula area and is incident on the target pill small cells to obtain the non-facula radiation flow corresponding to the target pill small cells, wherein the method comprises the following specific steps:
according to the non-facula radiation flow, the number and the area of the non-facula area cells corresponding to the target pill cells and the area of the target pill cells, calculating to obtain the non-facula radiation flow corresponding to the target pill cells, wherein the specific calculation formula is as follows:
Wherein, For the corresponding non-spot radiation flow of the target pill facet element,Ordinal numbers of the target pellet bins,To correspond to the number of non-spot area bins to the target pill bins,For the non-spot radiation stream,For the area of the z-th non-spot area facet corresponding to the target pill facet,For the area of the target pellet bin,For presetting the non-facula visual factor
Summing according to the light spot radiation flow and the non-light spot radiation flow corresponding to each target pill small surface element to obtain 4 incident to the ICF target pillA spatial X-ray radiation flow distribution.
2. The method for in-situ measurement of an X-ray radiation stream of an incident ICF target pellet according to claim 1, wherein the emitting a laser beam into a preset ICF black cavity forms a spot area on an inner wall of the preset ICF black cavity, and specifically comprises:
The surface of the preset ICF black cavity is provided with a plurality of injection openings, the laser beams respectively enter the preset ICF black cavity from the injection openings, and a plurality of light spot areas are formed on the inner wall of the preset ICF black cavity.
3. The method for in-situ measurement of X-ray radiation flow of an incident ICF target pellet of claim 1, wherein the measuring X-ray radiation flow of the spot area and the non-spot area, respectively, corresponds to a spot radiation flow and a non-spot radiation flow, and specifically comprises:
the X-ray radiation flows in the facula area and the non-facula area are measured respectively through two sets of preset space resolution radiation flow detection equipment, wherein the preset space resolution radiation flow detection equipment is equipment for realizing space resolution detection on the X-ray radiation flow emitted by the small micro-radiation source based on pinhole imaging and hole limiting and area selection principles, and the field of view of the preset space resolution radiation flow detection equipment is not more than a preset field of view threshold value.
4. The in-situ measurement method of an X-ray radiation stream of an incident ICF target pellet according to claim 1, wherein the dividing the inner wall of the black cavity model and the surface of the target pellet model into a plurality of small cells respectively corresponds to obtain a black cavity small cell and a target pellet small cell, specifically comprises:
dividing the inner wall of the preset ICF black cavity into a plurality of black cavity small cells, wherein the black cavity small cells positioned on the simulated light spot area are the light spot area small cells, and the black cavity small cells positioned on the simulated non-light spot area are the non-light spot area small cells;
Dividing the surface of the target pill model into a plurality of target pill small cells, wherein the areas of the plurality of target pill small cells are equal;
And respectively connecting the centers of the plurality of black cavity cells and the target pellet cells to obtain a plurality of cell connecting lines, and determining that the corresponding relationship exists between the target pellet cells through which the cell connecting lines pass and the black cavity cells corresponding to the cell connecting lines.
5. The method for in situ measurement of incident ICF target pellet X-ray radiation flow of claim 1, wherein the
Wherein, Is the included angle between the normal line of the facula area small cell corresponding to the target pill small cell and the connecting line of the facula area small cell corresponding to the target pill small cell and the target pill small cell,For the normal line of the target pellet small cell and the included angle between the x-th light spot area small cell corresponding to the target pellet small cell and the connecting line of the target pellet small cell,And the length of the connecting line of the facula area small cell and the target pill small cell, which corresponds to the target pill small cell, is the x-th length.
6. The method for in situ measurement of incident ICF target pellet X-ray radiation flow of claim 1, wherein the
Wherein, Is the included angle between the normal line of the non-facula area small cell corresponding to the target pill small cell and the connecting line of the non-facula area small cell corresponding to the target pill small cell and the target pill small cell,For the normal line of the target pill small cell and the included angle between the z-th non-facula small cell corresponding to the target pill small cell and the connecting line of the target pill small cell,And the length of the connecting line of the non-facula area small cell and the target pill small cell corresponding to the z-th target pill small cell is the length of the connecting line of the non-facula area small cell and the target pill small cell.
7. The in situ measurement method of the X-ray radiation flow of an incident ICF target pellet as defined in claim 1, wherein said summing results in 4 incident on said ICF target pellet based on the spot radiation flow corresponding to each of said target pellet cells and the non-spot radiation flow corresponding to said target pellet cellsThe spatial X-ray radiation flow distribution is specified as a summation formula:
Wherein, 4 To be incident on the ICF target pelletThe spatial X-ray radiation flux distribution,Ordinal numbers of the target pellet bins,Is the firstSpot radiation flows corresponding to the target pill facet elements,Is the firstAnd a non-facula radiation flow corresponding to each target pill facet element.
8. An in-situ measurement device for an incident ICF target pill X-ray radiation flow is characterized by comprising an emission module, a measurement module and a calculation module;
The emission module is used for emitting laser beams into a preset ICF black cavity, the laser beams irradiate the inner wall of the preset ICF black cavity to form a light spot area, and the area, except the light spot area, on the inner wall of the preset ICF black cavity is determined to be a non-light spot area;
the measuring module is used for measuring the X-ray radiation flows of the light spot area and the non-light spot area respectively, and correspondingly obtaining light spot radiation flows and non-light spot radiation flows;
The calculation module is used for constructing a black cavity-target pill model according to the preset ICF black cavity and the ICF target pill, and obtaining 4 incident to the ICF target pill according to the black cavity-target pill model, the facula radiation flow and the non-facula radiation flow The ICF target pill is positioned in the preset ICF black cavity;
the construction of the black cavity-target pill model according to the preset ICF black cavity and the ICF target pill specifically comprises the following steps:
Constructing a black cavity model with the same structure and size as those of the preset ICF black cavity according to the preset ICF black cavity and the light spot area, wherein a target pill model with the same structure and size as those of the ICF target pill is further arranged in the inner center of the black cavity model, and the black cavity model and the target pill model form the black cavity-target pill model;
According to the size and the position of the light spot area, setting a simulated light spot area and a simulated non-light spot area on the inner wall of the black cavity model, and respectively assigning the light spot radiation flow and the non-light spot radiation flow to the simulated light spot area and the simulated non-light spot area;
Dividing the inner wall of the black cavity model and the surface of the target pill model into a plurality of small cells respectively, and correspondingly obtaining a black cavity small cell and a target pill small cell, wherein the black cavity small cell comprises a facula area small cell and a non-facula area small cell, and one target pill small cell corresponds to a plurality of black cavity small cells;
calculating to obtain 4 incident to the ICF target pill according to the black cavity-target pill model, the light spot radiation flow and the non-light spot radiation flow The spatial X-ray radiation flow distribution specifically comprises:
According to the facula radiation flow and the facula area small cells corresponding to the target pill small cells, calculating the X-ray radiation flow which comes from the simulated facula area and is incident on the target pill small cells to obtain the facula radiation flow corresponding to the target pill small cells, wherein the specific steps are as follows:
According to the facula radiation flow, the quantity and the area of the facula area small cells corresponding to the target pill small cells and the area of the target pill small cells, calculating to obtain the facula radiation flow corresponding to the target pill small cells, wherein the specific calculation formula is as follows:
Wherein, For the corresponding spot radiation flow of the target pill facet element,Ordinal numbers of the target pellet bins,To correspond to the number of spot area bins to the target pill bins,For the radiation stream of the spot,For the area of the x-th light spot area cell corresponding to the target pill cell,For the area of the target pellet bin,Is a preset facula visual factor;
According to the non-facula radiation flow and the non-facula area small cells corresponding to the target pill small cells, calculating the X-ray radiation flow which comes from the simulated non-facula area and is incident on the target pill small cells to obtain the non-facula radiation flow corresponding to the target pill small cells, wherein the method comprises the following specific steps:
according to the non-facula radiation flow, the number and the area of the non-facula area cells corresponding to the target pill cells and the area of the target pill cells, calculating to obtain the non-facula radiation flow corresponding to the target pill cells, wherein the specific calculation formula is as follows:
Wherein, For the corresponding non-spot radiation flow of the target pill facet element,Ordinal numbers of the target pellet bins,To correspond to the number of non-spot area bins to the target pill bins,For the non-spot radiation stream,For the area of the z-th non-spot area facet corresponding to the target pill facet,For the area of the target pellet bin,For presetting the non-facula visual factor
Summing according to the light spot radiation flow and the non-light spot radiation flow corresponding to each target pill small surface element to obtain 4 incident to the ICF target pillA spatial X-ray radiation flow distribution.
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