29 results about "High energy resolution" patented technology

The utility model discloses a dimming system of an X-ray high-energy resolution spectrometer analysis crystal simulation light source, which is characterized by comprising a 4pi-emission point light source, an analysis crystal and a white board, the 4pi-emission point light source is arranged at the position of a sample and is used for simulating a fluorescence signal excited by X-rays irradiated on the sample; the analysis crystal is used for reflecting the incident fluorescence signal; and the white board is used for receiving the point light source signal reflected by the analysis crystal and determining the position of the surface detector according to the optimal receiving position. The light modulation system provided by the utility model is low in cost and easy to operate, can be used for rapid light modulation of von Hamos type and Johann type X-ray emission spectrometers, and also can realize rapid light modulation of von Hamos total cylindrical emission spectrometers.

The invention discloses a compact high-resolution epithermal neutron resonance absorption spectrum method and a compact high-resolution epithermal neutron resonance absorption spectrum device in the technical field of nuclear physics application, and aims to solve the problems of large size, high cost and limited application of a traditional epithermal neutron source. The method comprises the following steps: generating an epithermal neutron source with high repetition frequency and microsecond-level pulse by using a kilohertz femtosecond laser, accelerating an electron beam through a laser plasma wake field, bombarding a metal target to generate fast neutrons, and processing the fast neutrons through a polyethylene body to obtain an epithermal neutron energy spectrum with ultrahigh energy resolution; the device comprises a femtosecond laser, a vacuum target chamber, a supersonic nozzle, a high-atomic-number metal target, polyethylene, a collimator, an EJ-420 detector and other key components, and is compact in design, convenient to move and convenient for multi-scene application. The technology can realize accurate diagnosis of the type and abundance of nuclides in nuclear fuel and nuclear waste and non-contact temperature measurement in a special environment, and has important nuclear safety and nuclear guarantee application values.

This invention relates to the field of synchrotron radiation optical elements and discloses an X-ray monochromator device and an adjustment method for the X-ray monochromator device. The device includes: a base assembly; a spectroscopic crystal assembly, including a single-crystal crystal plate and two flexible connectors, the single-crystal crystal plate having a front and a back, the front being configured to face the X-ray incident direction, and the two flexible connectors symmetrically arranged on one side of the back of the single-crystal crystal plate and connecting the single-crystal crystal plate and the base assembly; a deformation detection element, which monitors the curvature change of the single-crystal crystal plate in real time and generates a feedback signal; and a loading mechanism, including at least two force-applying parts, at least two force-applying parts disposed between the two flexible connectors, at least two force-applying parts acting on the back, and the loading mechanism being able to control the at least two force-applying parts to act on the single-crystal crystal plate according to the feedback signal. This invention operates entirely at room temperature, and can achieve continuously adjustable curvature of the single-crystal crystal plate, no thermally induced lattice damage, and high energy resolution.

An object of the present disclosure is to obtain sufficient analysis accuracy and throughput when a sample is analyzed using two or more element analysis devices having different energy resolutions. An analysis system according to the present disclosure performs elemental analysis by using a second element analysis device having higher energy resolution than a first element analysis device, based on a result obtained by comparing a first energy spectrum of a target sample acquired by using the first element analysis device with a second energy spectrum of a reference sample acquired by using the first element analysis device (see FIG. 2).

The invention discloses an ultrahigh energy resolution analysis crystal and a preparation method thereof. The ultrahigh energy resolution analysis crystal comprises a concave substrate, a middle layer and a crystal, wherein the lower surface of the crystal, the upper surface and the lower surface of the middle layer and the concave spherical surface of the concave substrate are plated with Au layers, the lower surface of the crystal and the upper surface of the middle layer are oppositely bonded and connected into a combined body, and the upper surface of the crystal is the upper surface of the combined body; the lower surface of the combination body is in bonding connection with the concave spherical surface of the concave substrate; and grooving the upper surface of the combined body, and cutting the crystal through. According to the method, the spherical bending analysis crystal with the energy resolution reaching 1 meV can be manufactured.

The invention discloses a germanium-silicon bonding type photoelectric device and a preparation method, the photoelectric device at least comprises a germanium-silicon bonding substrate, the germanium-silicon bonding substrate is formed by bombarding a germanium substrate and a silicon substrate by using a non-metal fast atomic beam at a first set pressure and a first set temperature, the surface of the germanium-silicon bonding substrate is activated, and the bonding capability is enhanced; the photoelectric device structurally comprises a germanium-silicon bonding type PIN detector, and the germanium-silicon bonding type PIN detector structurally comprises but is not limited to a germanium-silicon bonding substrate, an active region electrode, a first back electrode and a first passivation contact layer; the photoelectric device further comprises a germanium-silicon bonding type silicon drift detector, and the germanium-silicon bonding type silicon drift detector structurally comprises but is not limited to a germanium-silicon bonding substrate, a drift electrode, a collector electrode, a second back electrode and a second passivation contact layer. Compared with a traditional PIN detector with a silicon substrate or a germanium substrate and a silicon drift detector, the photoelectric device combines high energy resolution and scattering capability of germanium with low noise and high detection efficiency of silicon so as to realize better detection performance.

The invention relates to a self-adaptive passing rate lanthanum bromide energy spectrum measuring device and method. The device comprises a dose rate monitoring unit, an analog switch control unit and a charge sensitive pre-amplification circuit. The dose rate monitoring unit monitors the environmental dose rate in real time, and the analog switch control unit automatically adjusts the resistance Rf in the charge-sensitive pre-amplification circuit according to the monitored dose rate, thereby changing the signal attenuation time tau, and ensuring that the pulse signal duration is shortened under the high dose rate so as to improve the passing rate. And meanwhile, relatively long signal decay time is kept at a low dosage rate so as to ensure high energy resolution. The measurement method relates to real-time monitoring of the dose rate and dynamic adjustment of the resistor Rf so as to adapt to pulse signal processing requirements in different dose rate environments.

This invention discloses a design method and detection method for a high-energy proton detection probe based on stacked cadmium zinc telluride (CZN), specifically involving the detection of protons with an energy of 100 MeV, belonging to the field of space particle measurement technology. The method steps are as follows: (1) screening the electrostatic shielding material of the stacked CZN probe; (2) calculating the number of layers and size of the stacked CZN semiconductor using the TRIM module in the SRIM software package of the Monte Carlo algorithm; (3) simulating the electrode structure and size of the stacked CZN detector using the AC / DC electrostatic module in the finite element software Comsol Multiphysics; (4) connecting each layer of the CZN detector to a preamplifier, then inputting the signal into an additive circuit for signal superposition, and then acquiring the energy spectrum through a main amplifier, multichannel, and computer. The method can detect high-energy protons with high energy resolution and accurate measurement results. The method is practical and feasible, and can serve space exploration activities.

The invention discloses a method for preparing a CZT high-energy-resolution radiation chip, and belongs to the technical field of electrical component production, and the method comprises the following steps: S1, growing a CZT crystal; s2, preparing a required CZT sheet by adopting the CZT crystal; s3, injecting a certain dose of fluorine ions into the CZT sheet; s4, performing an annealing process on the CZT sheet after the fluorine ions are injected, so that the fluorine ions are uniformly diffused in the CZT sheet to improve lattice defects during growth of the CZT crystal; s5, indium ions are injected into the surface layer of the cathode of the CZT sheet, so that the resistivity of the CZT sheet is improved, the energy band structure of the CZT sheet is changed, and a stronger radiation signal is generated; s6, the annealing process is carried out again, so that indium ions are more uniformly distributed on the surface layer of the CZT sheet; s7, plating platinum on the cathode surface of the CZT sheet, and plating indium on the anode surface of the CZT sheet; and S8, respectively connecting the CZT sheet with the cathode and the anode of the detector, and then packaging the CZT sheet with a shell. The method has the advantages that lattice defects are improved, and the carrier migration life product is improved.

The invention relates to a semiconductor and perovskite combined heterojunction radiation detector and a preparation method thereof, and belongs to the technical field of radiation detectors. The heterojunction radiation detector comprises an n-type semiconductor electron transport layer. The n-type side ohmic electrode is fixed on one side of the n-type semiconductor electron transport layer; the intrinsic perovskite absorption layer is fixed on the other side of the n-type semiconductor electron transport layer; the p-type oxide hole transport layer is fixed on one side, far away from the n-type semiconductor electron transport layer, of the intrinsic perovskite absorption layer; and the p-type side ohmic electrode is fixed on one side, far away from the intrinsic perovskite absorption layer, of the p-type oxide hole transport layer. According to the heterojunction radiation detector, the strong absorption capacity of a perovskite material to high-energy rays, the stability of a traditional semiconductor serving as a charge transport layer and the separation effect of a heterojunction built-in electric field to electron-hole pairs are integrated, and the heterojunction radiation detector has high sensitivity, high energy resolution, high stability and portability.

The invention provides a perovskite scintillation material CsPbCl < x > Br < 3-x > (0lt; xlt; 3) and a preparation method. The mixed halogen perovskite scintillation material is mixed halogen perovskite scintillation polycrystalline powder, mixed halogen perovskite scintillation ceramic or mixed halogen perovskite scintillation single crystal. And a novel scintillation material with an ultrafast decay time characteristic is obtained. Compared with a single halogen perovskite scintillation material, the mixed halogen perovskite scintillation material has the advantages that the luminescence property is greatly improved, the luminescence decay time is obviously shortened, the fluorescence emission intensity or the X-ray excitation emission intensity is enhanced, the scintillation light output / light yield is improved, and the energy resolution is reduced. Compared with a widely applied LYSO crystal, the mixed halogen perovskite scintillating material CsPbClxBr3-x (0lt; xlt; and 3) the attenuation time (10ns) is shorter, the production cost is lower, the time resolution can be better improved, and the TOF-PET film can be better applied to the TOF-PET field.

The invention relates to a lanthanum bromide-doped praseodymium bromide-improved cerium-doped scintillating material and a preparation method thereof. The chemical general formula of the cerium-lanthanum double-doped praseodymium bromide is (CexLay) Pr (1-x-y) Br3, wherein x is more than or equal to 0.05 and less than or equal to 0.25; 0 lt; and y < = 0.2. The cerium-lanthanum double-doped praseodymium bromide single crystal is obtained through a raw material preparation stage, a material melting stage and a crystal growth stage by adopting a sealed Bridgman-Stockbarger method. The invention provides a technical scheme of cerium bromide and lanthanum bromide double-doped praseodymium bromide, and a proper doping proportion is screened out according to reasonable prediction and experimental verification; after part of Pr < 3 + > of the praseodymium bromide cerium-doped scintillation material is replaced by La < 3 + >, the luminescence property is improved, the scintillation light yield / light yield is increased, the energy resolution is reduced, the luminescence decay time is slightly slowed down, and the quality of grown crystals is improved; the device can be applied to the ray detection fields of high-energy physics, nuclear physics, nuclear medical imaging diagnosis, industrial nondestructive inspection, geology, mineral and oil well exploration, environment and the like.

The present invention belongs to the technical field of ionizing radiation detection materials, and specifically relates to a low-dimensional halide scintillation material and its preparation method and application. The chemical formula of the material is A8BC3X 18 ; A is Cs; B is selected from at least one of Cu, Ag, Au, In and Tl; C is selected from at least one of La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Sc, Y and Lu; X is selected from at least one of F, Cl, Br and I. The material is easy to be made into single crystal, powder and polycrystalline film, and has the advantages of non-(weak) deliquescence, high ionizing radiation luminescence efficiency, no flickering luminescence self-absorption, high light output, low afterglow, high energy resolution, etc. It has important application prospects in the fields of medical imaging, security inspection, oil well exploration and industrial detection.

The present invention discloses a method for preparing a CZT high-energy resolution radiation chip, belonging to the field of electrical component production technology, comprising: S1. growing a CZT crystal; S2. preparing a desired CZT sheet using the CZT crystal; S3. injecting a certain dose of fluoride ions into the CZT sheet; S4. performing an annealing process on the CZT sheet after the fluoride ion injection to uniformly diffuse the fluoride ions in the CZT sheet, thereby improving lattice defects during CZT crystal growth; S5. injecting indium ions into the cathode surface layer of the CZT sheet to increase the resistivity of the CZT sheet and change the energy band structure of the CZT sheet to generate a stronger radiation signal; S6. performing an annealing process again to make the indium ions more uniformly distributed on the surface layer of the CZT sheet; S7. platinum-plating the cathode surface of the CZT sheet and indium-plating the anode surface of the CZT sheet; S8. connecting the CZT sheet to the cathode and anode of a detector, respectively, and then encapsulating the CZT sheet in a housing. The present invention has the advantages of improving lattice defects and increasing the carrier migration lifetime product.

The invention provides an application of rubidium lithium titanium germanate as a scintillation crystal. The chemical formula of the scintillation crystal rubidium lithium titanium germanate provided by the invention is Rb4Li2TiOGe4O12, the scintillation crystal has the advantages of intrinsic luminescence, no deliquescence, high energy resolution, high scintillation luminescence efficiency and the like, and the light yield of the scintillation crystal is high and is about 12,000 ph / MeV. And the scintillation crystal generates visible light emission with the wavelength of about 484 nm under the excitation of X rays. The scintillation crystal can be used in the fields of X-ray and high-energy particle detection and the like.

The invention discloses a real-time energy spectrum measurement system and method for a high radiation field environment. The system comprises an omnibearing shielding body used for blocking radiation in a high radiation field environment; the omni-directional shielding body is provided with a radiation channel. The turntable is mounted at the front end of the radiation channel and is used for controlling radiation to enter the radiation detector through the radiation channel; a plurality of collimators with different apertures are arranged on the turntable, during measurement, one required collimator is selected to be aligned with the radiation channel by rotating the turntable, and rays in a high radiation field are collimated and then enter the radiation detector through the radiation channel; when the measurement is not carried out, the turntable is rotated to shield the radiation channel; the radiation detector is arranged at the rear end of the radiation channel and is used for receiving radiation transmitted by the radiation channel; and the control and data processing unit is used for controlling the driving mechanism to rotate the turntable, and receiving and processing a signal acquired by the radiation detector. According to the invention, a distortionless and high-energy-resolution energy spectrum can be output, and the service life of equipment is prolonged.

The invention provides a space coding detection unit, method and device, a detector, electronic equipment and a storage medium. The space coding detection unit comprises a scintillator; at least one part of detection units are embedded in the scintillator according to a preset space coding function, and the detection element is used for detecting high-energy rays, visible light and / or dielectric constants. According to the invention, a signal of a high-energy ray, a scintillation light signal generated by the high-energy ray and a dielectric constant signal triggered by the high-energy ray can be detected at the same time, so that a high-time resolution signal and a high-energy resolution signal can be obtained at the same time; the deposition position of the high-energy ray in the scintillator can be more accurately obtained by adopting a space coding mode, and the final imaging quality is improved.

The invention provides a scintillator structure, a detection unit, a detector and detection equipment. The scintillator structure comprises at least one scintillation crystal, at least one dielectric and / or at least one Cherenkov scintillator. The scintillation crystal and the dielectric body and / or the Cherenkov scintillator are arranged according to a preset rule. The scintillator structure can provide heterogeneous detection data to obtain data with high energy resolution and high time resolution, so that higher image quality can be provided in imaging application.

The present invention discloses an ultra-high energy resolution analytical crystal and a method for preparing the same. The ultra-high energy resolution analytical crystal of the present invention comprises a concave substrate, an intermediate layer, and a crystal. The lower surface of the crystal, the upper and lower surfaces of the intermediate layer, and the concave spherical surface of the concave substrate are plated with Au. The lower surface of the crystal and the upper surface of the intermediate layer are bonded to form a combined body, and the upper surface of the crystal serves as the upper surface of the combined body. The lower surface of the combined body is bonded to the concave spherical surface of the concave substrate. The upper surface of the combined body is grooved to cut through the crystal. The present invention can produce spherically curved analytical crystals with an energy resolution of 1 meV.

The invention discloses a 4H-SiC material-based micro-groove structure neutron detector and a preparation method thereof, the neutron detector comprises a 4H-SiC substrate, at least one N + layer, an I + layer and at least one P + layer from bottom to top, the lower part of the 4H-SiC substrate is provided with a cathode, and the upper part of the P + layer is provided with an anode; wherein the I + layer adopts a 3-5-layer structure with different doping concentrations, and the 4H-SiC doping concentration between the layers is gradually reduced in a gradient manner; the P + layer adopts a 3-5-layer structure with different doping concentrations, and the 4H-SiC doping concentrations among the layers are gradually increased in a gradient manner; 7 to 10 layers of gradient doped micro grooves are etched in a PI region of the neutron detector, and each groove is filled with a neutron conversion material 6LiF; wherein the PI region is formed by a P + layer and an I + layer; the neutron detector has the advantages of micro groove, deep etching, large sensitive area, small electric leakage, radiation resistance, high temperature resistance, high energy resolution, high detection efficiency and the like.

The invention discloses a Compton imaging system simulation method, which relates to the technical field of Compton imaging and is characterized in that the working processes of a scattering detector and an absorption detector in a Compton camera under different conditions are simulated by adjusting the distance between a radioactive source and the scattering detector and the distance between the scattering detector and the absorption detector. Therefore, simulation analysis of the Compton imaging system is realized. Comprising a scattering detector and an absorption detector which are oppositely arranged, wherein the scattering detector and the absorption detector both comprise a plurality of same rectangular detector arrays, and each rectangular detector array is composed of a plurality of detection units. According to the invention, the plurality of semiconductor rectangular detector arrays with high energy resolution are combined into the scattering detector and the absorber detector, compared with the existing simulation and detection method, the detection space is widened, the detection efficiency and the energy resolution are improved, and the reconstruction precision of the imaging system can be improved.

To provide a technique capable of generating an energy selection image with high energy resolution, a wide field of view, and high sensitivity.SOLUTION: The image generator includes a Wien filter 108 having a multipole structure, an operation controller 150 configured to cause the Wien filter to form an axially symmetric lens field by applying the same voltage to all of a plurality of poles while causing the Wien filter to form an electric field and a magnetic field satisfying Wien conditions, a lower shunt 120 disposed below the Wien filter 108 and having a through-hole 123, and an electron detector 107 configured to detect secondary electrons having at least a predetermined energy among secondary electrons dispersed according to energy by the Wien filter 108.SELECTED DRAWING: Figure 1

The present application relates to a kind of variable chamber time projection chamber of low-energy single-energy neutron energy measurement, low-pressure working gas is filled in sealed chamber inside;Polyethylene support column is installed in sealed chamber, and a plurality of mounting slots are provided on polyethylene support column;Multiple cathode plate support is fixed on the mounting slot of polyethylene support column, and the mounting slot position can be replaced along the direction of polyethylene support column, and the moving step of replacement is centimeter level, anode plate is arranged at the lower bottom plate of sealed chamber;Grid plate support is fixed on the mounting slot of polyethylene support column, and the mounting slot position can be replaced along the direction of polyethylene support column, and the moving step of replacement is millimeter level;Single-energy neutron and low-pressure working gas scatter to form electron-ion pair, and move to anode plate along the direction of electric field.By setting variable chamber time projection chamber, the spacing between grid plate and anode plate can be adjusted, the error of recoil nuclear angle is reduced, the energy resolution is improved, and the neutron energy measurement uncertainty can be reduced to within 10%.

The application discloses a deep space radiation neutron detector and belongs to the technical field of nuclear radiation detection. The gadolinium film captures slow neutrons to generate multi-state particles, the TPC module detects the three-dimensional tracks and energy of the inner conversion electrons and Auger electrons, the energy quantifier module detects the energy of the prompt gamma rays, and efficient and high-precision neutron detection is realized through electron-gamma coincidence measurement. The application adopts gadolinium to replace the scarce 3 He, solves the problems of low efficiency and high cost of the traditional detector, combines the track reconstruction capability of the TPC module and the high energy resolution of the energy quantifier, significantly improves the signal-to-noise ratio and detection sensitivity of the neutron signal, and is suitable for fields such as deep space exploration and nuclear radiation monitoring.

The invention provides a pulse signal data processing method and system, and a terminal, and the method comprises the steps: carrying out the unsupervised clustering of the pulse height value of each pulse signal through a Gaussian mixture model, and calculating a target contraction covariance matrix of a noise signal data set through employing a Leidoit-Wolf contraction covariance estimation method, so as to achieve the calculation of the target contraction covariance matrix based on a minimum Mahalanobis distance criterion. The optimal pulse height fitting factor of each pulse signal is calculated, and the pulse height value of each pulse signal is corrected according to the optimal pulse height fitting factor, so that the technical problem that the existing pulse signal noise suppression technology is difficult to meet various noise suppression requirements of multi-energy radiation and dynamic radiation scenes is solved; the method improves the correction precision of the pulse height value and the signal-to-noise ratio of the pulse signal, can improve the discrimination capability of the superconducting phase-change edge detector on the pulse signal and the energy analysis accuracy of the to-be-detected sample when being applied to the superconducting phase-change edge detector to detect the to-be-detected sample, and guarantees the high-energy resolution of the superconducting phase-change edge detector.

The invention relates to the technical field of silicon-based neutron detectors, in particular to a silicon-based microstructure chip unit, a preparation method and a silicon-based microstructure neutron detector. Each silicon-based microstructure chip unit comprises an N-type silicon substrate, a silicon dioxide thick gate isolation layer, a boron ion layer, a silicon dioxide thin gate passivation layer, a phosphorus ion layer, a P-face metal electrode, an N-face metal electrode and a neutron material filling layer, and a deep-hole type silicon-based PIPS microstructure is formed. On the other hand, due to the reasonable design of the size of the deep hole type microstructure, the energy of secondary charged particles is deposited in the silicon to a greater extent, and a guarantee is provided for obtaining higher thermal neutron detection efficiency. According to the invention, a silicon PIPS preparation process is adopted, so that the microstructure neutron detector has lower noise, higher energy resolution and position resolution and higher working stability when being used for detecting secondary charged particles with different energies.

The invention provides a garnet aluminate scintillating material with high energy resolution as well as a preparation method and application thereof, and is characterized in that the scintillating material is doped with transition metal elements, and the chemical formula of the scintillating material is RE < 3-x-a-z > Ce < x > A M < z > Al < 5-y > DyO < 12 >, wherein 0 lt; x is greater than or equal to 0 and less than or equal to 2.4, 0 lt; z < = 0.1, 0 < = a < = 0.06; the rare earth element RE is selected from at least one of Gd, Lu, Y and La; d is selected from at least one of Ga, In and Sc; a is selected from at least one of Li, Mg, Ca, K, Na, Cr, Mn, Fe, Co, Ni, Yb and Nd; m is selected from at least one of Ag, Cd and Pd. The doping of dodecahedron sites is precisely regulated and controlled, the type and concentration of defects in the crystal are directionally regulated and controlled, and non-radiation loss is reduced, so that the existing performance bottleneck is broken through on the premise of keeping high light output, the light output is remarkably improved, and the energy resolution is greatly optimized.

The invention discloses a semiconductor detector used for gamma nuclide monitoring and a monitoring device. The semiconductor detector comprises a detection element and a signal processing module used for reading and processing a detection signal of the detection element. The detection element comprises a plurality of cadmium zinc telluride crystals which are arranged in an array mode; each tellurium-zinc-cadmium crystal adopts a pixel electrode structure, and unipolar charge sensitivity can be realized by a pixel electrode reading method. According to the semiconductor detector for gamma nuclide monitoring, the tellurium-zinc-cadmium crystals with high energy resolution are adopted, the energy resolution of the semiconductor detector is further improved through array type combination of the pixel electrodes and the tellurium-zinc-cadmium crystals, gamma nuclides in radioactive liquid effluents can be analyzed on line, and the accuracy of gamma nuclide monitoring is improved. And the monitoring requirement on the liquid effluent is met.

The invention provides a CCD-based read-out control method, electronic equipment and a storage medium, and relates to the technical field of astronomical satellite-borne X-ray detection. The method comprises the steps of determining a reading working mode of the frame transfer CCD, determining a reset period of a reading end under the condition that the reading working mode is a multi-row combination reading mode, keeping a level input into the reading end as a fixed level in the reset period, determining an initial combination signal according to a level of a previous frame and a level of a target row of a current frame, and outputting the initial combination signal to the frame transfer CCD. And performing noise correction operation on the initial combined signal to obtain a target combined signal, and obtaining a first read-out result according to the target combined signal, the reset period being greater than a preset frame number interval of one frame period. The objective of the invention is to improve the problem that the existing scheme cannot guarantee high energy resolution while improving the time resolution.