CN105676103A - Method and device for acquiring sensitive section of atmospheric neutron single event effect sensitive device - Google Patents

Abstract

The invention provides a method and a device for acquiring the sensitive section of an atmospheric neutron single event effect sensitive device. The method comprises the following steps: using a predetermined radiation source to conduct a ground simulation experiment, acquiring an observation value Sigma(observation) of the sensitive section of the sensitive device under radiation of the predetermined radiation source, and monitoring the number N(end) of single event effect errors of the sensitive device in the simulation experiment; calculating the value Epsilon of a random error according to the number N(end) of single event effect errors and a preset sensitive section measurement accuracy requirement; calculating the value A of a correction factor according to a system error A0 of the predetermined radiation source in the simulation experiment and the value Epsilon of the random error; and correcting the observation value Sigma(observation) of the sensitive section of the sensitive device under radiation of the predetermined radiation source according to the value A of the correction factor. According to the invention, the sensitive section of an atmospheric neutron single event effect sensitive device in a real environment can be acquired to provide an important basis for protection and evaluation of airborne electronic equipment.

Description

Obtain method and the device in the responsive cross section of atmospheric neutron single particle effect susceptible device susceptor

Technical field

The present invention relates to microelectronics technology, particularly relate to a kind of method and the device that obtain the responsive cross section of atmospheric neutron single particle effect susceptible device susceptor.

Background technology

Nature space environment exists the high energy atmospheric neutron of 1MeV～1000MeV, it with the air environment of the complicated microelectronic device of storage organization it is highly the high energy atmospheric neutron that will inevitably meet with about every square centimeter of 300～18000 1MeV～1000MeV per hour in the natural space environment of 3000～20000 meters in flight, produce single particle effect, thus affect the reliability of electronics. The single particle effect sensitivity characteristic of characterizing device in neutron environment is carried out in the world with responsive cross section. But, the domestic responsive cross-section data also not having under true environment at present, and flight test cost is higher. Therefore, become one of effectively evaluating device atmospheric neutron single particle effect sensitivity characteristic method by ground simulation test.

Domestic, the test pill that can be used for carrying out ground simulation test is 14MeV neutron emitter, but, owing to this neutron source is monoenergetic neutrons, and the energy of neutron is not single energy under true environment, therefore, the responsive cross section of simulation test gained susceptible device susceptor that existing 14MeV neutron emitter carries out and the responsive cross section of true environment susceptible device susceptor is utilized still to there is certain error, the sensitivity characteristic characterizing susceptible device susceptor under true environment can not be directly used in, and then cause accurately susceptible device susceptor in air environment to be carried out safety analysis.

Summary of the invention

For solving the problems of the technologies described above, the present invention proposes a kind of method and the device that obtain the responsive cross section of atmospheric neutron single particle effect susceptible device susceptor, by revising the testing data of predetermined source of radiation, obtain the responsive cross section of atmospheric neutron single particle effect susceptible device susceptor under true environment, and then realize that air environment is met with high-energy neutron in nature space environment and carry out specific aim protection and evaluate.

The present invention provides a kind of method obtaining the responsive cross section of atmospheric neutron single particle effect susceptible device susceptor, and the method comprises:

Adopt predetermined source of radiation to carry out ground simulating, obtain the observed value σ in the responsive cross section of susceptible device susceptor under predetermined radiate source radiation_Observation, and monitor the single particle effect number of errors N of susceptible device susceptor in described simulated experiment_end;

According to described single particle effect number of errors N_endAnd the measuring accuracy requirement in the responsive cross section preset, calculate the value ε of random error;

Systematic error A according to source of radiation predetermined in described simulated experiment₀And the value ε of described random error calculates the value A of modifying factor;

Value A according to described modifying factor is to the observed value σ in the described responsive cross section of susceptible device susceptor under predetermined radiate source radiation_ObservationRevise.

Preferably, described according to described single particle effect number of errors N_endAnd the measuring accuracy requirement in the responsive cross section preset, calculate the value ε of random error, specifically comprise:

Measuring accuracy computation model according to responsive cross section calculates dilution of precision a;

According to described dilution of precision a and described single particle effect number of errors N_endCalculating the value ε of random error, formula is as follows:

$\mathrm{\ϵ}=\frac{a}{\sqrt{N_{\mathrm{end}}}}.$

Preferably, the described systematic error A according to source of radiation predetermined in described simulated experiment₀And the value ε of described random error calculates the value A of modifying factor, concrete formula is as follows:

A=A₀±ε。

Preferably, the described value A according to described modifying factor is to the observed value σ in the described responsive cross section of susceptible device susceptor under predetermined radiate source radiation_ObservationRevise, specifically comprise:

Calculate described modifying factor A and the observed value σ in the described responsive cross section of susceptible device susceptor under predetermined radiate source radiation_ObservationProduct, obtain the responsive cross section σ of atmospheric neutron single particle effect susceptible device susceptor₀, formula is as follows:

σ₀=σ_Observation×A。

Preferably, described dilution of precision a is 1.96.

Accordingly, the invention allows for a kind of device obtaining the responsive cross section of atmospheric neutron single particle effect susceptible device susceptor, described device comprises:

Acquisition module, for adopting predetermined source of radiation to carry out ground simulating, obtains the observed value σ in the responsive cross section of susceptible device susceptor under predetermined radiate source radiation_Observation, and obtain the single particle effect number of errors N of susceptible device susceptor in the described simulated experiment monitored_end;

First calculating module, for according to described single particle effect number of errors N_endAnd the measuring accuracy requirement in the responsive cross section preset, calculate the value ε of random error;

2nd calculating module, for the systematic error A according to source of radiation predetermined in described simulated experiment₀And the value ε of described random error calculates the value A of modifying factor;

Correcting module, for the value A according to described modifying factor to the observed value σ in the described responsive cross section of susceptible device susceptor under predetermined radiate source radiation_ObservationRevise.

Preferably, described first calculating module comprises:

Dilution of precision calculates unit, for calculating dilution of precision a according to the measuring accuracy computation model in responsive cross section;

Random error calculates unit, for according to described dilution of precision a and described single particle effect number of errors N_endCalculating the value ε of random error, formula is as follows:

$\mathrm{\ϵ}=\frac{a}{\sqrt{N_{\mathrm{end}}}}.$

Preferably, described 2nd calculating module specifically for, according to the systematic error A of source of radiation predetermined in described simulated experiment₀And the value ε of described random error calculates the value A of modifying factor, concrete formula is as follows:

A=A₀±ε。

Preferably, described correcting module specifically for, calculate described modifying factor A and the observed value σ in the described responsive cross section of susceptible device susceptor under predetermined radiate source radiation_ObservationProduct, obtain the responsive cross section σ of atmospheric neutron single particle effect susceptible device susceptor₀, formula is as follows:

σ₀=σ_Observation×A。

The method in the responsive cross section of the acquisition atmospheric neutron single particle effect susceptible device susceptor adopting the present invention to propose and device, make use of the method for calculation of not reproducible sampling, under the predetermined source of radiation obtain test, the responsive cross section of neutron single-particle effect susceptible device susceptor is revised, the responsive cross section of atmospheric neutron single particle effect susceptible device susceptor under acquisition true environment, obtain the failure rate that sensitivity gets device accurately, so realize to air environment nature space environment in meet with high-energy neutron carry out specific aim protection with evaluate.

Accompanying drawing explanation

By reference to accompanying drawing can understanding the features and advantages of the present invention clearly, accompanying drawing is schematic and should not be construed as and the present invention carries out any restriction, in the accompanying drawings:

Fig. 1 is a kind of method flow diagram obtaining the responsive cross section of atmospheric neutron single particle effect susceptible device susceptor that the embodiment of the present invention one proposes;

Fig. 2 is a kind of apparatus module figure obtaining the responsive cross section of atmospheric neutron single particle effect susceptible device susceptor that the embodiment of the present invention two proposes.

Embodiment

For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments. Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.

The high energy atmospheric neutron of about every square centimeter of 300～18000 1MeV～1000MeV per hour will inevitably be met with in the natural space environment of flight height (3000～20000 meters) with the air environment of the complicated microelectronic device of storage organization. these high-energy neutrons can penetrate cabin covering, beat on the kernel instruction control unit or critical data storage unit of air environment, produce soft error to miss and hard fault, cause navigation (navigation receiving apparatus), radar-probing system (Connectors for Active Phased Array Radar), data network (the AFDX network switch), communication (optical fiber/bus), high speed computer system, avionic device, engine (FADEC), telex system, automatic Pilot technology, flight alarm, display screen, other contains the flight system of electron device etc. and black screen occurs, crash, reset, heavily open, data are lost, the safety hazards such as order loss. in order to set up protection and appraisement system, first need the responsive cross section obtaining atmospheric neutron single particle effect susceptible device susceptor under true environment. to this, the present invention proposes a kind of method and the device that obtain the responsive cross section of atmospheric neutron single particle effect susceptible device susceptor.

Fig. 1 is a kind of method flow diagram obtaining the responsive cross section of atmospheric neutron single particle effect susceptible device susceptor that the embodiment of the present invention one proposes, and as shown in Figure 1, the method comprises the following steps:

S101, adopts predetermined source of radiation to carry out ground simulating, obtains the observed value σ in the responsive cross section of susceptible device susceptor under predetermined radiate source radiation_Observation, and monitor the single particle effect number of errors N of susceptible device susceptor in described simulated experiment_end。

Preferably, the embodiment of the present invention adopt 14MeV neutron emitter as predetermined source of radiation, the observed value σ in the responsive cross section of susceptible device susceptor under 14MeV neutron emitter radiates_ObservationFor σ_14MeV。

Domestic carry out ground simulation test with the neutron emitter of 14MeV energy at present, to obtain responsive cross-section data, in embodiments of the present invention, ground simulation test carries out irradiation by 14MeV neutron emitter, obtains the observed value σ in the responsive cross section of susceptible device susceptor under 14MeV neutron emitter radiates_14MeV, by monitoring equipment record operating voltage and static current of lcd, retaking of a year or grade the single particle effect number of errors N of susceptible device susceptor that occurs in testing with pre-irradiation retaking of a year or grade Documents Comparison statistical simulation_end。

S102, according to described single particle effect number of errors N_endAnd the measuring accuracy requirement in the responsive cross section preset, calculate the value ε of random error.

S103, according to the systematic error A of source of radiation predetermined in described simulated experiment₀And the value ε of described random error calculates the value A of modifying factor.

S104, according to the value A of described modifying factor to the observed value σ in the described responsive cross section of susceptible device susceptor under predetermined radiate source radiation_ObservationRevise.

In embodiments of the present invention, adopt 14MeV neutron emitter as predetermined source of radiation, the observed value σ in the responsive cross section of susceptible device susceptor under 14MeV neutron emitter radiates_ObservationFor σ_14MeV, step S102 is according to described single particle effect number of errors N_endAnd the measuring accuracy requirement in the responsive cross section preset, calculate the value ε of random error, specifically comprise: calculate dilution of precision a according to the measuring accuracy computation model in responsive cross section;

According to described dilution of precision a and described single particle effect number of errors N_endCalculating the value ε of random error, formula is as follows:

$\mathrm{\ϵ}=\frac{a}{\sqrt{N_{\mathrm{end}}}}.$

σ_14MeV: the observed value in the responsive cross section of the susceptible device susceptor that 14MeV neutron emitter obtains. Unit: cm²/bit。

In embodiments of the present invention, adopt 14MeV neutron emitter as predetermined source of radiation, the observed value σ in the responsive cross section of susceptible device susceptor under 14MeV neutron emitter radiates_ObservationFor σ_14MeV, step S103 is according to the systematic error A of source of radiation predetermined in described simulated experiment₀And the value ε of described random error calculates the value A of modifying factor, concrete formula is as follows:

A=A₀±ε。

In embodiments of the present invention, step S104 according to the value A of described modifying factor to the observed value σ in the described responsive cross section of susceptible device susceptor under predetermined radiate source radiation_ObservationRevise, specifically comprise:

Calculate described modifying factor A and the observed value σ in the described responsive cross section of susceptible device susceptor under predetermined radiate source radiation_ObservationProduct, obtain the responsive cross section σ of atmospheric neutron single particle effect susceptible device susceptor₀, formula is as follows:

σ₀=σ_Observation×A。

Wherein, described dilution of precision a is 1.96.

Random error in the present invention has concrete computation model, and its model inference process is as follows:

First:

$\mathrm{\σ}=\frac{N}{F\×B}$

Wherein:

σ: the responsive cross section of atmospheric neutron single particle effect susceptible device susceptor. Unit: cm²/bit。

N: atmospheric neutron single particle effect number of errors. Unit: individual.

F: test accumulation fluence. Unit: #/cm²。

B: atmospheric neutron single particle effect susceptible device susceptor bit figure place. Unit: individual.

For in not reproducible sampling situation, conspicuous level α=0.05, during degree of confidence CL=1-α=0.95, according to the definition of fiducial interval, then the measuring accuracy computation model in responsive cross section is as follows:

${\mathrm{\Φ}}^{-1}\left(\frac{\mathrm{\α}}{2}\right)\·\frac{1}{\sqrt{N}}\·\sqrt{\frac{B-N}{B-1}}\≤\mathrm{\ϵ}$ ---formula 1

Due to

$\sqrt{\frac{B-N}{B-1}}\≈1$ And ${\mathrm{\Φ}}^{-1}\left(\frac{\mathrm{\α}}{2}\right)\≈1.96$

Therefore formula 1 can be rewritten as:

$\frac{1.96}{\sqrt{N}}=\frac{1.96}{\sqrt{\mathrm{\σ}\·B\·F}}\≤\mathrm{\ϵ}$ ---formula 2

According to accuracy requirement, the monitoring error number N that Selection experiment at least should reach before terminating, such as table 1:

Table 1 precision and test monitor error number N before terminating_endRelation

Nend	Standard deviation %	Precision ε %
			30	18.26%	35.79%
100	10.00%	19.60%
			300	5.77%	11.31%
1000	3.16%	6.19%
			3000	1.83%	3.56%
5000	1.41%	2.76%

Fig. 2 is a kind of apparatus module figure obtaining the responsive cross section of atmospheric neutron single particle effect susceptible device susceptor that the embodiment of the present invention two proposes, and as shown in Figure 2, described device comprises:

Acquisition module 201, for adopting predetermined source of radiation to carry out ground simulating, obtains the observed value σ in the responsive cross section of susceptible device susceptor under predetermined radiate source radiation_Observation, and obtain the single particle effect number of errors N of susceptible device susceptor in the described simulated experiment monitored_end;

First calculating module 202, for according to described single particle effect number of errors N_endAnd the measuring accuracy requirement in the responsive cross section preset, calculate the value ε of random error;

2nd calculating module 203, for the systematic error A according to source of radiation predetermined in described simulated experiment₀And the value ε of described random error calculates the value A of modifying factor;

Correcting module 204, for the value A according to described modifying factor to the observed value σ in the described responsive cross section of susceptible device susceptor under predetermined radiate source radiation_ObservationRevise.

The embodiment of the present invention adopt 14MeV neutron emitter as predetermined source of radiation, the observed value σ in the responsive cross section of susceptible device susceptor under 14MeV neutron emitter radiates_ObservationFor σ_14MeV。

The first calculating module 202 in the embodiment of the present invention comprises:

Dilution of precision calculates unit, for calculating dilution of precision a according to the measuring accuracy computation model in responsive cross section;

Random error calculates unit, for according to described dilution of precision a and described single particle effect number of errors N_endCalculating the value ε of random error, formula is as follows:

$\mathrm{\ϵ}=\frac{a}{\sqrt{N_{\mathrm{end}}}}.$

In the embodiment of the present invention the 2nd calculating module 203 specifically for, according to the systematic error A of source of radiation predetermined in described simulated experiment₀And the value ε of described random error calculates the value A of modifying factor, concrete formula is as follows:

A=A₀±ε。

Correcting module 204 in the embodiment of the present invention specifically for, calculate described modifying factor A and the observed value σ in the described responsive cross section of susceptible device susceptor under predetermined radiate source radiation_ObservationProduct, obtain the responsive cross section σ of atmospheric neutron single particle effect susceptible device susceptor₀, formula is as follows:

σ₀=σ_Observation×A。

The method in the responsive cross section of the acquisition atmospheric neutron single particle effect susceptible device susceptor that the present invention proposes and device, have following useful effect:

Instant invention overcomes the responsive cross section of simulation test gained susceptible device susceptor utilizing domestic existing predetermined source of radiation to carry out and the responsive cross section of true environment susceptible device susceptor exists the problem of certain error, by utilizing the method for calculation of not reproducible sampling, under the predetermined source of radiation obtain test, the responsive cross section of neutron single-particle effect susceptible device susceptor is revised, the responsive cross section of atmospheric neutron single particle effect susceptible device susceptor under acquisition true environment, obtain the failure rate that sensitivity gets device accurately, and then realize to air environment nature space environment in meet with high-energy neutron carry out specific aim protection with evaluate.

Through the above description of the embodiments, the technician of this area can be well understood to the present invention and can pass through hardware implementing, it is also possible to the mode adding necessary general hardware platform by software realizes. Based on such understanding, the technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that a computer equipment (can be Personal Computer, server, or the network equipment etc.) performs the method described in each embodiment of the present invention.

It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, module or flow process in accompanying drawing might not be that enforcement the present invention is necessary.

It will be appreciated by those skilled in the art that the module in the device in embodiment can describe according to embodiment to carry out being distributed in the device of embodiment, it is also possible to carry out respective change and be arranged in the one or more devices being different from the present embodiment. The module of above-described embodiment can merge into a module, it is also possible to splits into multiple submodule block further.

Several specific embodiments being only the present invention disclosed in above, but, the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.

Claims (9)

1. one kind obtains the method in the responsive cross section of atmospheric neutron single particle effect susceptible device susceptor, it is characterised in that, comprising:

Adopt predetermined source of radiation to carry out ground simulating, obtain the observed value σ in the responsive cross section of susceptible device susceptor under predetermined radiate source radiation_Observation, and monitor the single particle effect number of errors N of susceptible device susceptor in described simulated experiment_end;

According to described single particle effect number of errors N_endAnd the measuring accuracy requirement in the responsive cross section preset, calculate the value ε of random error;

Systematic error A according to source of radiation predetermined in described simulated experiment₀And the value ε of described random error calculates the value A of modifying factor;

Value A according to described modifying factor is to the observed value σ in the described responsive cross section of susceptible device susceptor under predetermined radiate source radiation_ObservationRevise.

2. method according to claim 1, it is characterised in that, described according to described single particle effect number of errors N_endAnd the measuring accuracy requirement in the responsive cross section preset, calculate the value ε of random error, specifically comprise:

Measuring accuracy computation model according to responsive cross section calculates dilution of precision a;

According to described dilution of precision a and described single particle effect number of errors N_endCalculating the value ε of random error, formula is as follows:

$\mathrm{\ϵ}=\frac{a}{\sqrt{N_{\mathrm{end}}}}.$

3. method according to claim 1, it is characterised in that, the described systematic error A according to source of radiation predetermined in described simulated experiment₀And the value ε of described random error calculates the value A of modifying factor, concrete formula is as follows:

A=A₀±ε。

4. method according to claim 1, it is characterised in that, the described value A according to described modifying factor is to the observed value σ in the described responsive cross section of susceptible device susceptor under predetermined radiate source radiation_ObservationRevise, specifically comprise:

Calculate described modifying factor A and the observed value σ in the described responsive cross section of susceptible device susceptor under predetermined radiate source radiation_ObservationProduct, obtain the responsive cross section σ of atmospheric neutron single particle effect susceptible device susceptor₀, formula is as follows:

σ₀=σ_Observation×A。

5. method according to claim 2, it is characterised in that, described dilution of precision a is 1.96.

6. one kind obtains the device in the responsive cross section of atmospheric neutron single particle effect susceptible device susceptor, it is characterised in that, described device comprises:

Acquisition module, for adopting predetermined source of radiation to carry out ground simulating, obtains the observed value σ in the responsive cross section of susceptible device susceptor under predetermined radiate source radiation_Observation, and obtain the single particle effect number of errors N of susceptible device susceptor in the described simulated experiment monitored_end;

First calculating module, for according to described single particle effect number of errors N_endAnd the measuring accuracy requirement in the responsive cross section preset, calculate the value ε of random error;

2nd calculating module, for the systematic error A according to source of radiation predetermined in described simulated experiment₀And the value ε of described random error calculates the value A of modifying factor;

Correcting module, for the value A according to described modifying factor to the observed value σ in the described responsive cross section of susceptible device susceptor under predetermined radiate source radiation_ObservationRevise.

7. device according to claim 6, it is characterised in that, described first calculating module comprises:

Dilution of precision calculates unit, for calculating dilution of precision a according to the measuring accuracy computation model in responsive cross section;

Random error calculates unit, for according to described dilution of precision a and described single particle effect number of errors N_endCalculating the value ε of random error, formula is as follows:

$\mathrm{\ϵ}=\frac{a}{\sqrt{N_{\mathrm{end}}}}.$

8. device according to claim 6, it is characterised in that, described 2nd calculating module specifically for, according to the systematic error A of source of radiation predetermined in described simulated experiment₀And the value ε of described random error calculates the value A of modifying factor, concrete formula is as follows:

A=A₀±ε。

9. device according to claim 6, it is characterised in that, described correcting module specifically for, calculate described modifying factor A and the observed value σ in the described responsive cross section of susceptible device susceptor under predetermined radiate source radiation_ObservationProduct, obtain the responsive cross section σ of atmospheric neutron single particle effect susceptible device susceptor₀, formula is as follows:

σ₀=σ_Observation×A。