CN103697908B - A kind of X-ray pulsar signal simulation source based on random single photon emission mechanism - Google Patents
A kind of X-ray pulsar signal simulation source based on random single photon emission mechanism Download PDFInfo
- Publication number
- CN103697908B CN103697908B CN201310618168.4A CN201310618168A CN103697908B CN 103697908 B CN103697908 B CN 103697908B CN 201310618168 A CN201310618168 A CN 201310618168A CN 103697908 B CN103697908 B CN 103697908B
- Authority
- CN
- China
- Prior art keywords
- ray
- pulsar
- signal
- pulse
- data
- 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.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/02—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by astronomical means
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Astronomy & Astrophysics (AREA)
- Automation & Control Theory (AREA)
- X-Ray Techniques (AREA)
Abstract
The invention discloses a kind of X-ray pulsar signal simulation source based on random single photon emission mechanism.Use the present invention can provide ground experiment platform in the radiation characteristic of laboratory simulation X-ray pulsar for X-ray pulsar navigation system.X-ray pulsar signal simulation source includes X-ray pulsar outline data maker, X-ray pulsar pulse profile manipulator, temporal frequency synthesizer, X-ray signal generator, collimator and obscuration filter.Using inverse function generating random number method to realize pulsar photon and reach the generation of time data sequence and space-orbit dynamic effect and the loading of large-scale space-time effect, use high stable temporal frequency integrated system, pulse period degree of stability is 10‑13Magnitude, uses the X ray excited generator of light, it is possible to achieve the simulation of X-ray pulsar radiation signal, radiant-energy spectrum 1～15keV, radiant flux is by force 1～10‑5ph/s/cm2, pulse profile degree of approximation more than 95%.
Description
Technical field
The present invention relates to precise light field of electromechanical technology, be specifically related to a kind of based on random single photon emission mechanism
X-ray pulsar signal simulation source.
Background technology
X-ray pulsar navigation is that the X-ray signal radiated using pulsar inputs as information, is penetrated by X
Line detector measures the x-ray photon information time of advent, extracts X-ray pulsar pile-up pulse profile, warp
Cross corresponding signal and data process and measure pulse arrival time TOA, as pulsar Autonomous Navigation Algorithm
Basic input quantity, through Kalman filtering iterative computation, to be embodied as LEO, deep space and interstellar space
The spacecraft of flight provides the navigation informations such as high-precision position, speed, time and attitude.
For verification experimental verification X-ray pulsar autonomous navigation system feasibility, appraising X-ray pulsar is from leading
The reasonability of boat algorithm, checking X-ray pulsar navigation detector key technology and quantitative test detector
Technical specification, needs to be simulated X-ray pulsar signal.
Summary of the invention
In view of this, the invention provides a kind of X-ray pulsar letter based on random single photon emission mechanism
Number simulation source, it is possible to laboratory simulation X-ray pulsar radiation characteristic, such as power spectrum, cycle, wheel
Wide, strong, the parallel beams of stream etc., provide ground experiment platform for X-ray pulsar navigation system.
The X-ray pulsar signal simulation source based on random single photon emission mechanism of the present invention, including: X
Ray pulse star-wheel exterior feature Data Generator, X-ray pulsar pulse profile manipulator, temporal frequency synthesizer,
X-ray signal generator, collimator and obscuration filter；Wherein, X-ray pulsar outline data generates
Device, X-ray pulsar pulse profile manipulator, temporal frequency synthesizer, X-ray signal generator, standard
Straight device and obscuration filter are sequentially connected in series, temporal frequency synthesizer and X-ray pulsar pulse profile manipulator
It is connected；
Wherein, X-ray pulse outline data maker is according to X-ray pulsar database data, in conjunction with big
Metric space effect and in-orbit dynamic effect generate the data sequence representing the x-ray photon time of advent；
X-ray pulsar Profile modulation device receives the data sequence of the x-ray photon time of advent, generates correspondence
Sign reach the voltage pulse signal of time, be used for modulating and driving X-ray signal generator；
Temporal frequency synthesizer provides stable temporal frequency for X-ray pulsar pulse profile manipulator；
X-ray signal generator receives the voltage pulse signal consistent with X-ray pulsar profile, generates phase
The X-ray pulse signal answered；
The angle of divergence of X-ray pulse signal is regulated and controled by collimator so that it is export with quasi-parallel light beam；
The parallel X-ray radiant flux of obscuration filter collimation device output is adjusted by force controlling.
The X-ray pulsar signal simulation source of the present invention also includes calibration module, to the X-ray pulse generated
Star analog signal parameter is demarcated and is tested, and is evaluated the quality of X-ray pulsar signal source.
Wherein, in described X-ray pulse outline data maker, inverse function method is used to generate X-ray light
Sub-time of advent sequence:
The x-ray photon data t random time of adventn+1For
tn+1=Λ-1(Λ(tn)-ln(1-U))
Wherein, U is the equally distributed random number on [0,1] interval, and E=-ln (1-U) is 1 for meeting expected value
The random number of exponential；Λ () is the integration arrival rate function of Poisson process:
Wherein, λsFor the x-ray photon arrival rate of known pulsar, λbT () is that the X of known background penetrates
The sub-arrival rate of linear light, h () is the normalized function of known pulsar pulse profile, and f is known X-ray
The rotation frequency of pulsar,For impulse phase function,For transporting due to spacecraft
The Doppler frequency shift moved and cause, φ0For inceptive impulse phase place, t0For initial time, t is the time, and v is boat
It device speed, c is the light velocity.
Described X-ray pulsar pulse profile manipulator includes DDS manipulator and drive circuit for laser；Institute
State DDS manipulator include opening controller, timer, phase accumulator, data look-up table, arbiter and
Pulse generator, wherein, timer is connected with opening controller, arbiter, temporal frequency synthesizer, number
Being connected with phase accumulator, arbiter according to look-up table, pulse generator is connected with arbiter；DDS modulation methods
Method is as follows: first the photon data time of advent that X-ray pulse outline data maker produces are downloaded to number
According in look-up table, phase accumulator is in order to produce the address information of data query, and its initial value points to data and looks into
Look for first time data of table, when starting timer, the output of timer under the control of opening controller
Between the time data of data and data look-up table be simultaneously fed into arbiter, when arbiter judges the output of timer
Exporting a triggering signal when time data is equal with the time data of data look-up table, this triggering signal drives arteries and veins
Rush generator and export a nanosecond electric pulse, simultaneously drive phase accumulator and add 1, be repeated in circulation operation,
Complete the conversion to the electric pulse of express time of the photon data time of advent.
X-ray signal generator is made up of semiconductor laser, photocathode x ray generator, described time
Pole x ray generator includes the X ray excited generator of laser beam expander, diminisher and light, wherein, described
The X ray excited generator of light includes shell, photocathode, plate target and output window；Wherein, wherein, outward
Shell contains two windows places photocathode and X-ray output window respectively, and plate target is positioned over enclosure,
Plate target is loaded high voltage power supply, thus between photocathode and plate target, produces high voltage electric field；X-ray
The pulse voltage signal of pulsar pulse profile manipulator output is loaded on semiconductor laser generation simulation and adjusts
The optical signal of system, optical signal completes to cover the light of the X ray excited generator of light after laser instrument beam expander extends
Electricity negative electrode, when photocathode is irradiated by laser, produces photoelectron and bombards anode after high voltage electric field accelerates
Target, produces X-radiation, after export through X-ray exit window；Diminisher is placed on laser beam expander
In the middle of photocathode, in order to regulate the output intensity of laser.
Collimator uses Polycapillary X-ray lens, and described Polycapillary X-ray lens is by (30～50) × 104Root
X-ray conduit forms；Described X-ray conduit is the hollow capillary vessel of inner surface unusual light.
Obscuration filter is N shell metal forming, N >=1.
Calibration module is demarcated by force unit, cycle stability scale cell and pulse profile kiss by X-radiation stream
Right demarcation unit forms；X-radiation stream demarcates by force unit for completing to simulate x-ray radiation source radiation
The demarcation of intensity；The cycle of the pulsar X-ray signal that cycle stability scale cell is used for test simulation is steady
Fixed degree；The pulse profile goodness of fit is demarcated unit and is used for the pulse profile parameter detecting simulation and real pulse wheel
Wide goodness of fit.
Beneficial effect:
(1) X-ray pulsar signal simulation source of the present invention can be in laboratory simulation X-ray pulsar
Radiation characteristic, the simulation fine vacuum in X-ray space, high/low temperature and high energy particle background environment, for X
Ray pulse star navigation system provides ground experiment platform.
(2) use inverse function generating random number method, pulsar photon can be realized and reach the life of time data sequence
Become and space-orbit dynamic effect and the loading of large-scale space-time effect.
(3) high stable temporal frequency integrated system is used, it is possible to achieve pulse period degree of stability is 10-13Magnitude.
(4) the X ray excited generator of light is used, it is possible to achieve the simulation of X-ray pulsar radiation signal,
Radiant-energy spectrum 1～15keV, radiant flux is by force 1～10-5ph/s/cm2, pulse profile degree of approximation more than 95%.
(5) use capillary tube collimating lens, the spherical wave X-ray shaping that an x-ray source is launched is as the criterion
Plane wave.
Accompanying drawing explanation
Fig. 1 is X-ray pulsar signal simulation source pie graph.
Fig. 2 is Profile modulation device based on DDS.
Fig. 3 is temporal frequency synthesizer.
Fig. 4 is the relation of semiconductor laser luminous power and modulation electric current.
Fig. 5 is photocathode x ray generator.
Fig. 6 is capillary X-ray collimating lens.
Detailed description of the invention
Develop simultaneously embodiment below in conjunction with the accompanying drawings, describes the present invention.
The invention provides a kind of X-ray pulsar signal simulation source based on random single photon emission mechanism,
As it is shown in figure 1, include that X-ray pulsar outline data maker, X-ray pulsar pulse profile are modulated
Device, temporal frequency synthesizer, X-ray signal generator, collimator and obscuration filter.Wherein, X penetrates
Line pulsar outline data maker, X-ray pulsar pulse profile manipulator, temporal frequency synthesizer, X
Ray signal generator, collimator and obscuration filter are sequentially connected in series, temporal frequency synthesizer and X-ray arteries and veins
Rush star pulse profile manipulator to be connected.
Wherein, X-ray pulse outline data maker is according to X-ray pulsar database data, such as pulse
Star numbering, pulse period, calibration pulse profile, timing model, radiant flux etc., in conjunction with large-scale dimension
Effect and in-orbit dynamic effect generate the data sequence representing the x-ray photon time of advent.Anti-letter can be used
Number random number algorithm generates the X-ray pulsar photon data time of advent.
X-ray pulsar Profile modulation device receives the data sequence of the x-ray photon time of advent, generates correspondence
Sign reach the voltage pulse signal of time, the X-ray wheel of the profile of this voltage pulse signal and pulsar
Wide (cycle of signal, amplitude, shape etc.) keep consistent, are used for modulating and drive X-ray signal to occur
Device.Direct digital synthesizer DDS technology can be used, it is achieved the simulation to any X-ray pulse profile,
Then corresponding voltage pulse signal is produced through drive circuit for laser.
Temporal frequency synthesizer provides stable temporal frequency for X-ray pulsar pulse profile manipulator, real
The high stability of the electrical modulation pulse signal cycle of existing pulsar Profile modulation device output.
X-ray signal generator receives the voltage pulse signal consistent with X-ray pulsar profile, generates phase
The X-ray pulse signal answered, the profile of pulsed X-ray signal, cycle, cycle stability degree and radiant flux
The parameter such as strong is consistent with the pulsar actual parameter selected.Semiconductor laser and photocathode X can be used
Ray generator realizes X-ray pulse signal height realistic simulation.
The angle of divergence of X-ray pulse signal is regulated and controled by collimator so that it is export with quasi-parallel light beam.Can
To use Polycapillary X-ray lens to realize the shaping to X-ray beam, obtain quasi-parallel X-ray, simulate X
Ray pulse star space radiation behavior.
The parallel X-ray radiant flux of obscuration filter collimation device output is adjusted by force controlling so that it is stream is strong
Arrive the magnitude that pulsar radiant flux is strong.
In addition, it can include calibration module, the X-ray pulsar analog signal parameter generated is marked
Determine and test, and the quality of X-ray pulsar signal source is evaluated.
Wherein, in X-ray pulse outline data maker, by large-scale dimension effect and the most dynamically imitate
Should be superimposed upon on the calibration pulse skeleton pattern of pulsar data base, use inverse function method to generate x-ray photon
The time of advent sequence.
The impulse radiation photon of X-ray pulsar arrives detector, and the process recorded by detector can table
It is shown as nonhomogeneous Poisson process, is shown below:
P(Na,b=k) it is the probability detecting k photon in time interval [a, b], wherein λ (t) is X-ray
Photon arrives the arrival rate function of detector.X-ray photon arrival rate function lambda (t) is derived from the X of pulsar and penetrates
The sub-arrival rate of linear light and the summation of Background X-ray photon arrival rate, be shown below:
Wherein λsFor the x-ray photon arrival rate of known pulsar, λbT () is the X-ray of known background
Photon arrival rate, h () is the normalized function of known pulsar pulse profile, and f is known X-ray arteries and veins
Rush the rotation frequency of star.Impulse phase functionIn,Represent owing to spacecraft moves
And the dynamic effect in-orbit of the Doppler frequency shift caused, i.e. spacecraft, φ0For inceptive impulse phase place, t0For initially
In the moment, t is the time, and v is spacecraft speed, and c is the light velocity.Poisson stochastic process pair represented by formula (1)
Mathematical expectation and the variance is answered to be:
E(Na,b)=var (Na,b)=Λ (a)-Λ (b) (3)
Wherein, Λ () is the integration arrival rate function of Poisson process,
According to formula (1) and the character of Poisson distribution, with tnFor starting point to tn+1=tn+ z moment point detects
The probability-distribution function of x-ray photon is:
F(z|tn=t)=1-exp [-(Λ (t+z)-Λ (t))] (4)
Its inverse function is:
F-1(z|tn=t)=-t+ Λ-1(Λ (t)-ln (1-z)) (5)
Theory according to producing random number based on inverse function method: known U is equally distributed on [0,1] interval
Random number, random number X meets probability-distribution function F (x), then random number X can be produced by following formula:
X=F-1(U) (6)
By formula (5) and formula (6) data t available random time of adventn+1For:
tn+1=Λ-1(Λ(tn)-ln (1-U)) (7)
Owing to U is the equally distributed random number on [0,1] interval, it is full for understanding-ln (1-U) through mathematical derivation
Foot expected value is the random number of the exponential of 1, represents with E, then formula (7) is represented by:
tn+1=Λ-1(Λ(tn)+E) (8)
Meridional (8) produce the photon random number sequence time of advent { tiMeet the pulsar radiated photons letter time of advent
Number distribution function formula (4), i.e. by pulsar contour reconstruction algorithm (cycle folding algorithm) can be from random
Number Sequence { tiRecover pulse profile function h (φ).It is summed up, the photon data time of advent can be obtained raw
One-tenth algorithm is:
In X-ray pulsar pulse profile manipulator, use direct digital synthesizer DDS technology, real
Existing pulse profile modulation.Pulse profile modulator principle based on DDS is as in figure 2 it is shown, include opening control
Device, timer, phase accumulator, data look-up table, arbiter and pulse generator, wherein, timer
It is connected with opening controller, arbiter, temporal frequency synthesizer, data look-up table and phase accumulator, sentences
Other device is connected, and pulse generator is connected with arbiter.First, X-ray pulse outline data maker is produced
The raw photon data time of advent download in data look-up table, and phase accumulator is in order to produce data query
Address information, its initial value points to first data of data look-up table, opens under the control of opening controller
Moving timer, the output time data of timer and the time data of data look-up table are simultaneously fed into arbiter,
The A end of device to be discriminated is equal to output during B end one triggering signal, i.e. relative to the time etc. of start-up time passage
When the time data of data look-up table, drive-pulse generator exports a nanosecond electric pulse, and this touches simultaneously
Signalling feeds back to phase accumulator, drives phase accumulator to add 1, makes the next data of data look-up table output,
It is repeated in circulation operation, completes the conversion to the electric pulse of express time of the photon data time of advent.
The long-term stability in pulsar cycle can arrive 10-19, the degree of stability of current atom clock also do not reach as
This high degree of stability.In order to verify pulsar navigation algorithm and feasibility, select the atomic clock that degree of stability is higher
As time and frequency standard for the cycle of stable pulse signal, degree of stability can reach 10-13Magnitude, at X
During X-ray detection X, select the clock (high stable crystal oscillator) that degree of stability is relatively low, record x-ray photon
The time of advent, degree of stability can reach 10-10.According to pulsar navigation principle, utilizing degree of stability is 10-13
Pulsed X-ray signal low degree of stability high stable crystal oscillator is carried out time adjustment, it is achieved pulsar time synchronize
Verification experimental verification.Temporal frequency synthesizer principle is as it is shown on figure 3, be made up of atomic clock and phase-locked loop, and it is defeated
The periodic signal of the high stable gone out is loaded on pulsar Profile modulation and drive circuit for laser, it is achieved pulse
The high stability of signal.Atomic clock is as standard frequency source, and the frequency time signal of output high stable is as lock
The reference frequency of phase loop circuit.Phaselocked loop is a kind of feedback circuit, by phase discriminator (PD), low pass filter (LF)
Constitute with voltage controlled oscillator (VCO), make the Phase synchronization of the clock on circuit and external clock.Phaselocked loop
The phase place of phase place and voltage controlled oscillator (VCO) by comparing caesium clock signal realizes synchronization, is comparing
During phase-locked loop circuit constantly can adjust the clock phase of crystal oscillator according to the phase place of atomic clock signal, directly
To the Phase synchronization of two signals, thus realize the periodic pulse signal of high stable, using this signal as pulse
The clock signal of Profile modulation device, to reach to modulate the high stability in pulse profile cycle.
X-ray signal generator is made up of semiconductor laser, photocathode x ray generator.Pulse profile
The pulse voltage signal of manipulator output, is loaded on semiconductor laser the optical signal producing analog-modulated,
This optical signal exciting light cathode X-ray generator, produces pulsed X-ray signal.In above process, warp
Having gone through voltage pulse signal to light pulse signal, light pulse signal arrives twice conversion of X-ray pulse signal again,
The broadening of pulse signal will necessarily be brought in twice transformation process.Research shows to use pulsed laser irradiation time
Pole x ray generator produces pulse signal broadening and is about 100ps, and the broadening of this magnitude affects relative to pulse
Star microsecond is to being negligible from the point of view of the pulse width of millisecond magnitude.
Semiconductor laser, with pulse-modulator output electric impulse signal as modulation source, it is achieved electric pulse believe
Number to the conversion of light pulse signal.Semiconductor laser is that one can send coherent radiation under electric current injects
The opto-electronic device of light.When adding forward bias to device, electronics is injected in N district to P district, and P district is to N district
Inject hole, form electron-hole pair, by unnecessary energy with photon at active region electronics and hole-recombination
Form discharges, and by special process, radiant light is strictly propagated in PN junction plane, forms monochromaticity
Preferably, the stimulated radiation that intensity is bigger.For the best semiconductor laser, output Pe with
The relation of injection current I as shown in Figure 4, can be expressed as:
Wherein IthFor threshold current, as injection current I ＞ IthTime, output is linear with I.
Photocathode x ray generator includes the X ray excited generator of laser beam expander, diminisher and light.Its
In, the output beam of laser beam expander noise spectra of semiconductor lasers is extended so that it is completes to cover light and excites X
The photocathode of ray generator, diminisher is placed in the middle of laser beam expander and photocathode, in order to regulate
The output intensity of laser.
The X ray excited generator of light, is made up of shell, photocathode, plate target and output window, such as Fig. 5
Shown in.Wherein, shell contains two windows places photocathode and X-ray output window respectively, and plate target is put
It is placed in enclosure, plate target is loaded high voltage power supply, thus between photocathode and plate target, produces height
Piezoelectric field.When the negative electrode of x ray generator is irradiated by laser, produce photoelectron and add through high voltage electric field
Bombard plate target after speed, produce X-radiation, after export through window.When having fast due to photocathode
Between response and the advantage of little first energy dispersion, it can be ensured that the pulse profile feature of the X-ray of outgoing with enter
The feature penetrating light pulse profile is basically identical.
Collimator uses Polycapillary X-ray lens, Polycapillary X-ray lens collimation principle schematic such as Fig. 6
Shown in.X-ray lens is generally by (30～50) × 104Root X-ray conduit forms.X-ray conduit is that inner surface is non-
The hollow capillary vessel that ordinary light is sliding.When X-ray is with outer cirtical angle of total reflection θ less than glass materialcGlancing incidence
During to capillary vessel inwall, it will propagate to out from the incidence end of conduit through multiple reflections with the highest reflectance
Penetrate end, the curved shape of appropriate design capillary tube, it is possible to realize convergence or the standard of similar ordinary optical lens
Straight effect.X-ray energy according to x-ray lens transmission and the user requirement to lens-shape size, X
Photonic catheter internal diameter at several microns to tens micrometer ranges.
Incident X-rays is decayed by obscuration filter so that it is stream is strong arrives the magnitude that pulsar radiant flux is strong.
Use N shell metal forming (N >=1) that X-ray is decayed, by using different materials, different-thickness
Metal forming makes X-radiation stream the most basically identical with the radiant flux of selected pulsar by force.
Calibration module is strong by X-radiation stream, cycle stability degree, the pulse profile goodness of fit are demarcated unit and formed.
X-radiation stream is demarcated by force, completes to simulate the demarcation of x-ray radiation source radiant intensity；Cycle stability scale
Cell, the cycle stability degree of the pulsar X-ray signal of test simulation；The pulse profile goodness of fit, detection
The pulse profile parameter of simulation and real pulse profile goodness of fit.
In sum, these are only presently preferred embodiments of the present invention, be not intended to limit the guarantor of the present invention
Protect scope.All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made,
Should be included within the scope of the present invention.
Claims (7)
1. an X-ray pulsar signal simulation source based on random single photon emission mechanism, it is characterised in that
Including: X-ray pulsar outline data maker, X-ray pulsar pulse profile manipulator, time frequency
Rate synthesizer, X-ray signal generator, collimator and obscuration filter；Wherein, X-ray pulse star-wheel
Wide Data Generator, X-ray pulsar pulse profile manipulator, temporal frequency synthesizer, X-ray signal
Generator, collimator and obscuration filter are sequentially connected in series, temporal frequency synthesizer and X-ray pulsar pulse
Profile modulation device is connected；
Wherein, X-ray pulsar outline data maker according to X-ray pulsar database data, in conjunction with
Large-scale dimension effect and in-orbit dynamic effect generate the data sequence representing the x-ray photon time of advent；
Wherein, in described X-ray pulsar outline data maker, inverse function method is used to generate X-ray
The photon sequence time of advent:
The x-ray photon data t random time of adventn+1For
tn+1=Λ-1(Λ(tn)-ln(1-U))
Wherein, U is the equally distributed random number on [0,1] interval, and E=-ln (1-U) is 1 for meeting expected value
The random number of exponential；Λ () is the integration arrival rate function of Poisson process:
Wherein, λsFor the x-ray photon arrival rate of known pulsar, λbT () is that the X of known background penetrates
The sub-arrival rate of linear light, h () is the normalized function of known pulsar pulse profile, and f is known X-ray
The rotation frequency of pulsar,For impulse phase function,For transporting due to spacecraft
The Doppler frequency shift moved and cause, φ0For inceptive impulse phase place, t0For initial time, t is the time, and v is boat
It device speed, c is the light velocity；
X-ray pulsar pulse profile manipulator receives the data sequence of the x-ray photon time of advent, generates
Corresponding sign reaches the voltage pulse signal of time, is used for modulating and driving X-ray signal generator；
Temporal frequency synthesizer provides stable temporal frequency for X-ray pulsar pulse profile manipulator；
X-ray signal generator receives the voltage pulse signal consistent with X-ray pulsar profile, generates phase
The X-ray pulse signal answered；
The angle of divergence of X-ray pulse signal is regulated and controled by collimator so that it is export with quasi-parallel light beam；
The parallel X-ray radiant flux of obscuration filter collimation device output is adjusted by force controlling.
2. X-ray pulsar signal imitation based on random single photon emission mechanism as claimed in claim 1
Source, it is characterised in that also include calibration module, is carried out the X-ray pulsar analog signal parameter generated
Demarcate and test, and the quality of X-ray pulsar signal source is evaluated.
3. X-ray pulsar signal imitation based on random single photon emission mechanism as claimed in claim 1
Source, it is characterised in that described X-ray pulsar pulse profile manipulator includes DDS manipulator and laser instrument
Drive circuit；Described DDS manipulator includes opening controller, timer, phase accumulator, data search
Table, arbiter and pulse generator, wherein, timer is combined with opening controller, arbiter, temporal frequency
Clutch is connected, and data look-up table is connected with phase accumulator, arbiter, and pulse generator is connected with arbiter；
DDS modulator approach is as follows: the photon time of advent first produced by X-ray pulsar outline data maker
Data download in data look-up table, and phase accumulator is in order to produce the address information of data query, and it is initial
Value points to first time data of data look-up table, starts timer, meter under the control of opening controller
Time the output time data of device and the time data of data look-up table be simultaneously fed into arbiter, when arbiter judges
Exporting a triggering signal when output time data of timer are equal with the time data of data look-up table, this touches
Signalling drive-pulse generator exports a nanosecond electric pulse, simultaneously drives phase accumulator and adds 1, weighs successively
Circulate operation again, complete the conversion to the electric pulse of express time of the photon data time of advent.
4. X-ray pulsar signal imitation based on random single photon emission mechanism as claimed in claim 1
Source, it is characterised in that X-ray signal generator is by semiconductor laser, photocathode x ray generator group
Becoming, described photocathode x ray generator includes the X ray excited generator of laser beam expander, diminisher and light,
Wherein, the X ray excited generator of described light includes shell, photocathode, plate target and output window；Wherein,
Shell contains two windows places photocathode and X-ray output window respectively, and plate target is positioned over enclosure,
Plate target is loaded high voltage power supply, thus between photocathode and plate target, produces high voltage electric field；X-ray
The pulse voltage signal of pulsar pulse profile manipulator output is loaded on semiconductor laser generation simulation and adjusts
The optical signal of system, optical signal completes to cover the photoelectricity of the X ray excited generator of light after laser beam expander extends
Negative electrode, when photocathode is irradiated by laser, produces photoelectron and bombards plate target after high voltage electric field accelerates,
Produce X-radiation, after export through X-ray exit window；Diminisher is placed on laser beam expander and light
In the middle of electricity negative electrode, in order to regulate the output intensity of laser.
5. X-ray pulsar signal imitation based on random single photon emission mechanism as claimed in claim 1
Source, it is characterised in that collimator use Polycapillary X-ray lens, described Polycapillary X-ray lens by (30～
50)×104Root X-ray conduit forms；Described X-ray conduit is the hollow capillary vessel of inner surface unusual light.
6. X-ray pulsar signal imitation based on random single photon emission mechanism as claimed in claim 1
Source, it is characterised in that described obscuration filter is N shell metal forming, N >=1.
7. X-ray pulsar signal imitation based on random single photon emission mechanism as claimed in claim 2
Source, it is characterised in that described calibration module is demarcated by force unit by X-radiation stream, cycle stability scale is determined
Unit and the pulse profile goodness of fit demarcate unit composition；X-radiation stream demarcates by force unit for completing to simulate X
The demarcation of ray radiation source radiant intensity；Cycle stability scale cell is used for the pulsar X of test simulation and penetrates
The cycle stability degree of line signal；The pulse profile goodness of fit is demarcated unit and is used for detecting the pulse profile parameter of simulation
With real pulse profile goodness of fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310618168.4A CN103697908B (en) | 2013-11-28 | 2013-11-28 | A kind of X-ray pulsar signal simulation source based on random single photon emission mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310618168.4A CN103697908B (en) | 2013-11-28 | 2013-11-28 | A kind of X-ray pulsar signal simulation source based on random single photon emission mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103697908A CN103697908A (en) | 2014-04-02 |
| CN103697908B true CN103697908B (en) | 2016-08-17 |
Family
ID=50359520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310618168.4A Active CN103697908B (en) | 2013-11-28 | 2013-11-28 | A kind of X-ray pulsar signal simulation source based on random single photon emission mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103697908B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748766B (en) * | 2014-12-19 | 2017-10-13 | 中国航天科技集团公司第五研究院第五一三研究所 | A kind of X-ray pulsar spectral distribution simulation system |
| CN104567937B (en) * | 2015-01-27 | 2017-08-29 | 中国空间技术研究院 | A kind of high-precision X-ray pulsar signal imitation method |
| CN104764466B (en) * | 2015-04-02 | 2017-10-24 | 西安电子科技大学 | Dynamic pulse star signal imitation device with many physical characteristics |
| CN106052712B (en) * | 2016-05-05 | 2019-10-08 | 中国人民解放军国防科学技术大学 | A kind of semi-physical object simulating method and system of X-ray pulsar Dynamic Signal |
| CN108919236B (en) * | 2018-03-27 | 2021-06-22 | 北京跟踪与通信技术研究所 | Simulation analysis method and device for space debris laser ranging effect |
| US11209478B2 (en) * | 2018-04-03 | 2021-12-28 | Applied Materials, Inc. | Pulse system verification |
| CN108572355B (en) * | 2018-04-04 | 2022-03-22 | 南京理工大学 | Laser echo simulation device |
| CN109391325B (en) * | 2018-11-06 | 2020-09-29 | 中国空间技术研究院 | Visible light positioning system, method and device based on single photon |
| CN109765636B (en) * | 2019-01-25 | 2020-10-23 | 北京空间飞行器总体设计部 | Ground test method for space X-ray detection positioning precision |
| CN110176961B (en) * | 2019-05-15 | 2021-09-10 | 山东航天电子技术研究所 | Frequency keying modulation device and method based on X-ray photon energy |
| CN110686702B (en) * | 2019-09-27 | 2022-10-11 | 中国科学院上海光学精密机械研究所 | Pulsar photon flow simulation system and method based on light field high-order correlation |
| CN112098052B (en) * | 2020-09-15 | 2022-08-30 | 中国气象局气象探测中心 | Photon pulse signal generating method and device |
| CN112284329A (en) * | 2020-10-22 | 2021-01-29 | 中国空间技术研究院 | Ground experiment system for correlation measurement of X-ray intensity at pulsar angular position |
| CN114279437B (en) * | 2021-12-24 | 2024-04-02 | 西安电子科技大学 | Arbitrary flow pulsar profile generation method based on grid-control X-ray source |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1337806B1 (en) * | 2000-11-08 | 2008-12-10 | Centre National D'etudes Spatiales | Ground test bench for stellar sensor |
| CN103047986A (en) * | 2012-12-29 | 2013-04-17 | 中国空间技术研究院 | Large-scale space-time and on-orbit dynamic effect simulation method |
| CN103048000A (en) * | 2012-12-29 | 2013-04-17 | 中国空间技术研究院 | X-ray pulsar navigation ground test system |
| CN103091700A (en) * | 2013-01-09 | 2013-05-08 | 中国科学院空间科学与应用研究中心 | Satellite-borne pulsar X-ray spectrometer |
| CN103105811A (en) * | 2012-12-29 | 2013-05-15 | 中国空间技术研究院 | Ground test signal control system for X-ray pulsar navigation |
-
2013
- 2013-11-28 CN CN201310618168.4A patent/CN103697908B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1337806B1 (en) * | 2000-11-08 | 2008-12-10 | Centre National D'etudes Spatiales | Ground test bench for stellar sensor |
| CN103047986A (en) * | 2012-12-29 | 2013-04-17 | 中国空间技术研究院 | Large-scale space-time and on-orbit dynamic effect simulation method |
| CN103048000A (en) * | 2012-12-29 | 2013-04-17 | 中国空间技术研究院 | X-ray pulsar navigation ground test system |
| CN103105811A (en) * | 2012-12-29 | 2013-05-15 | 中国空间技术研究院 | Ground test signal control system for X-ray pulsar navigation |
| CN103091700A (en) * | 2013-01-09 | 2013-05-08 | 中国科学院空间科学与应用研究中心 | Satellite-borne pulsar X-ray spectrometer |
Non-Patent Citations (1)
| Title |
|---|
| 用于脉冲星导航的X射线光子计数探测器研究;胡慧君等;《物理学报》;20121231;第61卷(第1期);第019701-1-019701-6页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103697908A (en) | 2014-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103697908B (en) | A kind of X-ray pulsar signal simulation source based on random single photon emission mechanism | |
| Abbott et al. | Multiline transfer and the dynamics of stellar winds | |
| Desselberger et al. | Use of X-ray preheated foam layers to reduce beam structure imprint in laser-driven targets | |
| Curcio et al. | Trace-space reconstruction of low-emittance electron beams through betatron radiation in laser-plasma accelerators | |
| Kennel et al. | Pulsar magnetospheres | |
| CN111649764B (en) | Pulsar signal simulation system and method with correlation characteristics | |
| Schmidt et al. | Type II solar radio bursts predicted by 3‐D MHD CME and kinetic radio emission simulations | |
| CN104748766B (en) | A kind of X-ray pulsar spectral distribution simulation system | |
| Kowalski | Search for neutrino-induced cascades with the AMANDA-II detector | |
| Raulin et al. | Solar radio emissions | |
| Miller et al. | Kinetic simulation of plasma flows in the inner magnetosphere | |
| Punjabi et al. | H 2 (p, 2p) n at 508 MeV: Recoil momenta≤ 200 MeV/c | |
| Fletcher | The observational motivation for computational advances in solar flare physics | |
| Blaksley | Photodetection Aspects of JEM-EUSO and Studies of the Ultra-High Energy Cosmic Ray Sky | |
| Mannion | Studying high energy density plasmas using three-dimensional neutron spectroscopy | |
| Anokhin et al. | Application of silicon planar structures for the spectrum determination of the proton beams produced by laser-driven particle accelerators-Theoretical approach | |
| Aghion et al. | APS: Producing long-lived $2 {\phantom {\rule {0.16 em}{0ex}}}^{3} S $ positronium via $3 {\phantom {\rule {0.16 em}{0ex}}}^{3} P $ laser excitation in magnetic and electric fields | |
| Vandervort | Experiments at the Intersection of Inertially Confined Fusion and Astrophysics: An Investigation of an Asymmetrically Irradiated Foam Sphere | |
| Thomas et al. | X-ray Pump-Probe Measurements using a Laser-Plasma Accelerator | |
| Russell | Alfvén waves in solar flares | |
| Morris | High energy X-ray production in laser-solid interactions | |
| Platts | Computational analysis techniques using fast radio bursts to probe astrophysics | |
| Wang | Accreting neutron stars and black holes | |
| Parker et al. | Constraining the absolute neutrino mass with black hole-forming supernovae and scintillation detectors | |
| Morris | Variability in gamma-ray sources |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |