348 results about "Scintillator" patented technology

The invention relates to the technical field of electron energy measurement, and discloses an electron spectrometer and an electron energy spectrum measurement method and system.The electron spectrometer comprises a magnetic deflection unit used for receiving an incident to-be-measured electron beam, generating a magnetic field and applying the magnetic field to all to-be-measured electrons in the to-be-measured electron beam; the scintillator fluorescent screen is arranged at the downstream of the magnetic deflection unit and used for receiving the deflected electrons to be detected, and the electrons bombard the scintillator fluorescent screen and generate light spots; the optical acquisition unit is used for acquiring a light spot image on the scintillator fluorescent screen; and the signal processing unit is used for processing the light spot image so as to identify the spatial position information of the light spot in the light spot image and convert the spatial position information into electronic energy data. The method has the beneficial effects that the unification of high resolution and high measurement efficiency is realized, and the problem of signal accumulation under a high counting rate of a traditional direct measurement method and the inherent defect of low efficiency of a scanning type magnetic spectrometer are overcome.

The invention discloses a muon monitoring device and a tunnel monitoring method thereof.The muon monitoring device comprises multiple layers of muon detection modules which are arranged in a laminated mode in the height direction, and each layer of muon detection module comprises a shell, a scintillator array, an optical reflection shielding layer, a front-end signal processing plate and a signal leading-out plate, and the scintillator array, the optical reflection shielding layer, the front-end signal processing plate and the signal leading-out plate are arranged in the shell; the scintillator array is arranged between the optical reflection shielding layer and the front-end signal processing board, and the front-end signal processing board of the muon detection module on the upper layer and the optical reflection shielding layer of the muon detection module on the lower layer of two adjacent layers are arranged oppositely, the scintillator array comprises a plurality of scintillator units arranged in a two-dimensional matrix mode, a photomultiplier is arranged at the bottom of each scintillator unit, the photomultipliers are fixedly installed on the front-end signal processing board, and the front-end signal processing board is in signal connection with the signal leading-out board arranged at the edge of the scintillator array.

The invention discloses a muon track reconstruction method and imaging method based on a muon detector, and the method comprises the following steps: S1, according to the numbers of a first scintillator, a second scintillator and a third scintillator hit by the muon in any muon breakdown event, determining the number of the first scintillator, the number of the second scintillator and the number of the third scintillator; determining azimuth angles of the first scintillator, the second scintillator and the third scintillator hit by the muon; s2, according to the azimuth angle of the first scintillator hit by the muon, the x-axis coordinate value and the y-axis coordinate value of the incidence point and the emergence point of the muon are determined; according to the azimuth angle of the second scintillator hit by the muon and the azimuth angle of the third scintillator hit by the muon, respectively determining z-axis coordinate values of an incidence point and an emergence point of the muon; and S3, determining the track of the muon according to the x-axis coordinate value, the y-axis coordinate value and the z-axis coordinate value of the incidence point and the emergence point of the muon. Compared with the prior art, the method has the advantages that the accuracy of z-axis positioning is remarkably improved while high detection efficiency is kept, so that the accuracy of muon track reconstruction and ore body imaging is improved.

The invention discloses a crystal compound, a preparation method thereof and application of the crystal compound in X-ray detection, imaging and anti-counterfeiting encryption, and belongs to the technical field of crystals. The molecular formula of the crystal compound is [Cu (totp) (CH3CN) 3] [Cu2I3 (totp) (PN)]. (CH3CN), wherein totp is tris (o-tolyl) phosphine; and PN is diphenyl-2-pyridine phosphine. The crystal compound disclosed by the invention is simple in preparation method, and has the characteristics of large mass attenuation coefficient of X-ray energy, high light yield and low detection limit when being used as a material of an X-ray detector. The compound also has the characteristic of structural transformation in solvents such as methanol, ethanol, acetone, dichloromethane, tetrahydrofuran and the like, and meanwhile, the conversion of luminescence color under the excitation of 365nm ultraviolet light and X rays is accompanied. The material can be applied to the aspects of scintillator materials, room-temperature X-ray radiation indirect detection materials, radiation detection dosimeters, X-ray scintillator medical imaging, anti-counterfeiting encryption and the like.

The invention provides a scintillator film for a real-time X-ray dosimeter as well as a preparation method and application of the scintillator film. The preparation method comprises the following steps: weighing Eu (NO3) 3.6 H2O, Tb (NO3) 36H2O, Lu (NO3) 36H2O, NaF and NH4F to prepare powder B; preparing a rare earth fluoride material C from the powder B; weighing a polydimethylsiloxane prepolymer and a curing agent, adding the polydimethylsiloxane prepolymer and the curing agent into a cyclohexane solution, and performing ultrasonic dispersion to obtain a mixture D; adding the rare earth fluoride material C and PMMA particles into an ethanol solution, and uniformly dispersing to obtain a mixture E; dropwise adding the mixture E into the stirred mixture D, and performing vacuum mixing to obtain a mixture F; and transferring the mixture F to the surface of a ceramic plate which is respectively cleaned by water, ethanol and acetone and dried, coating to form a thin film, heating and annealing, and cooling to obtain the flexible scintillator thin film NaLuF4: Tb < 3 + > / Eu < 3 + > coated PDMS which is used for a real-time X-ray dosimeter.

The invention discloses a muon detector with variable scintillator spacing, which comprises a supporting base, and a bottom plate is arranged at the upper end part of the supporting base; the lower-layer detection part is fixedly arranged at the end part of the bottom plate, a multi-stage mechanical telescopic mechanism is arranged on the bottom plate, and an upper-layer detection part is arranged at the end part of the multi-stage mechanical telescopic mechanism; the main control data acquisition system is electrically connected with the multi-stage mechanical telescopic mechanism, the upper-layer detection part and the lower-layer detection part, and is used for setting and acquiring a distance value between the upper-layer detection part and the lower-layer detection part; and calculating according to the collected real-time spacing value, and performing corresponding data correction and image reconstruction according to the effective detection range and the optimal detection area under the current configuration. According to the method, the spatial resolution and the counting rate can be dynamically adjusted, so that the performance limitation caused by a fixed spacing design is broken through, and the comprehensive efficiency in a complex detection task is remarkably improved.

The invention belongs to the technical field of X-ray imaging, and particularly relates to a grid structure and method for filtering scattered X-rays, the grid structure comprises a scintillator array and a grid partition plate arranged between scintillator units, and the grid partition plate is made of a high-density material. The core is that the grid ratio (H / L) of the grid is greater than or equal to 8: 1 and less than or equal to 20: 1, and the grid density is greater than or equal to 80 line pairs / cm and less than or equal to 150 line pairs / cm. Through the design of high grating ratio and high density, space filtering is carried out by utilizing a geometric channel, scattered X-rays in disordered directions are effectively blocked, and meanwhile, original rays are allowed to pass through. According to the method, energy filtering is indirectly realized, and low-energy scattering photons are preferentially absorbed. The method can significantly suppress image fog noise, improves image contrast and signal-to-noise ratio, and can be widely applied to various X-ray detection systems.

The invention belongs to the field of hybrid metal halide scintillator materials, and discloses a manganese-based organic-inorganic hybrid metal halide, a scintillator film and a preparation method thereof. The structural formula of the manganese-based organic-inorganic hybrid metal halide is (C33H29NP) xMnXy.zL, in the structural formula, X is one or more of F, Cl, Br and I, 0 lt; x is less than or equal to 2, 0lt; y is smaller than or equal to 4, L is one or more of C2H6O, CH4O, CH2Cl2 and H2O, and z is larger than or equal to 0. The manganese-based organic-inorganic hybrid metal halide scintillator has the advantages of simple synthesis, low cost, environmental friendliness, excellent luminescence performance and the like, and can be effectively excited by ultraviolet light and high-energy X rays. After the scintillator material is prepared into a flexible film, clear imaging under X-rays can be realized, and the scintillator material has certain application potential in the field of medical X-ray imaging and the field of safety inspection.

A flexible muon detector for inspecting an object has: a continuous scintillator film (102) for detecting incident muons by generating photons; photomultipliers (104) discretely distributed across a face of the continuous scintillator film, which are configured to optically connect to the continuous scintillator film. The discrete photomultipliers (104) are arranged to detect the generated photons and generate corresponding electrical signals; and flexible electronics (106) electrically connected to the photomultipliers so as to receive the generated electrical signals.

The application belongs to the field of scintillator material preparation, and particularly relates to a manganese-based pixelated scintillator array and a preparation method and application thereof. The (BuTPP)2MnBr4 scintillator material in a molten state is filled into a quartz glass cavity by capillary action, and a glass scintillator matrix is formed by cooling and quenching; then, in-situ crystallization is realized in the glass scintillator by using femtosecond laser direct writing processing, and a pixelated array is precisely constructed. The in-situ crystallization induced by the femtosecond laser significantly improves the photoluminescence intensity and the radiation luminescence intensity of the material, effectively solves the problems of low luminescence efficiency, high pixelation processing difficulty and poor crystallization controllability of the traditional glass scintillator, and the prepared pixelated scintillator array has stable optical performance and clear pixel boundary, is suitable for X-ray imaging, radiation detection and the like, and has simple preparation process and strong controllability of parameters, thereby providing a new implementation method for the preparation of arrayed X-ray scintillators.

The invention provides a radioactive substance transportation monitoring system, and relates to the technical field of radioactive substance transportation safety monitoring. The radioactive substance transportation monitoring system comprises a transfer protection box and a monitoring unit integrated on the transfer protection box, and the monitoring unit is composed of a double-detector fusion module, a three-dimensional data linkage analysis module and an active emergency disposal module which are sequentially connected through a circuit. The double-detector fusion module comprises a GM counting tube and a scintillator detector which are arranged inside and outside the box so as to realize alpha, beta, gamma and neutron multi-nuclide coverage; the three-dimensional data linkage analysis module performs comprehensive judgment based on internal and external doses of the box, temperature and humidity and vibration data, and accurately identifies protection failure or article leakage; and the active emergency disposal module automatically starts gate closing and adsorption measures in an emergency. According to the system, the problems of monitoring blind areas, reduced protection performance, frequent false alarm, emergency passivity and the like are solved, and the transportation safety and the intelligent level are improved.

X-ray scintillators based on amorphous organic metal halide hybrid films are demonstrated, which can be prepared via a facile solution processing with a non-crystalline organic halide salt reacting with metal halide at low temperature. The solution processed scintillators exhibit excellent scintillation properties, thermal stability, mechanical resilience, and processability.

According to the high-gain back scattering detector and the observation system provided by the invention, the detector can be adaptively integrated with the immersed objective lens, and the combination scheme can realize the remarkable advantage of no loss of the working distance. According to the detector provided by the invention, the light path conduction structure is optimized, and the detector is cooperatively matched with the immersed objective lens, so that the advantage of high-resolution imaging of the immersed objective lens is reserved, the efficient capturing capability of the detector on backscattered electrons is maintained, and sufficient working distance can still be ensured in a high-precision observation scene. The flexible optical fiber is adopted to complete optical signal transmission in the sample bin, the length and the overall size of the light guide pipe can be effectively reduced, and the situation that a large-size light guide pipe of a conventional scintillator type back scattering electron detector occupies too much space in the sample bin is avoided. In addition, the detector realizes four-channel independent imaging of the scintillator type back scattering electron detector through a customized four-channel light guide pipe by connecting an independent optical fiber and a PMT.

This disclosure discloses a method and application for template-assisted preparation of metal halide scintillator arrays. The preparation method includes: preparing a scintillator precursor solution; placing a porous alumina (AAO) template in a filtration device, adding the scintillator precursor solution dropwise, and filtration under vacuum conditions to allow the precursor solution to penetrate into the pores of the AAO template; adding the scintillator precursor solution dropwise onto a substrate surface, covering the droplets on the substrate surface with the AAO template, and performing secondary filtration in a vacuum drying oven to enhance the formation of a dense metal halide scintillator array on the AAO template. This disclosure, based on AAO template loading assistance and employing two vacuum filtration processes, enables the formation of a dense metal halide scintillator array on an AAO template. The preparation process is simple, fully controllable, and significantly reduces the manufacturing cost of metal halide scintillator arrays, effectively meeting the demand for low-cost, high-resolution scintillator array construction.

The invention discloses a highly-oriented quasi-two-dimensional perovskite multi-wafer scintillator for X-ray detection imaging and a preparation method of the highly-oriented quasi-two-dimensional perovskite multi-wafer scintillator, and relates to the technical field of radiation detection and scintillation materials, the highly-oriented quasi-two-dimensional perovskite multi-wafer scintillator comprises phenethyl ammonium bromide, cesium lead tribromide and ammonium thiocyanate, the molar ratio of the phenethyl ammonium bromide to the cesium lead tribromide to the ammonium thiocyanate is 2: 4: 2, the scintillator contains a methylamine thiocyanate additive which accounts for 0-1 equivalent weight of the dosage of the ammonium thiocyanate, and the scintillator is of a flaky polycrystal structure; the perovskite crystal of the polycrystalline wafer has a quasi-two-dimensional layered crystal structure, and each crystal grain is arranged in a height orientation manner, so that the layered crystal face is parallel to the main plane of the scintillator sheet. According to the highly-oriented quasi-two-dimensional perovskite multi-wafer scintillator for X-ray detection imaging and the preparation method of the highly-oriented quasi-two-dimensional perovskite multi-wafer scintillator, a highly-oriented layered structure is formed in the crystal, diffuse scattering of emergent light is greatly reduced, brightness uniformity and spatial resolution of X-ray imaging are improved, and a finer imaging effect is achieved.

Methods and systems are disclosed that enhance the yield and speed of emission and control the spectral and angular emission of light emitted by materials under irradiation by high-energy particles through a process known as scintillation. In each case, a photonic structure (of nano- or micron-scale feature sizes) is integrated with a scintillating material, and the photonic structure enhances the yield or controls the spectrum of the material. Various embodiments of this technology and practical demonstrations are disclosed.

The present application relates to the technical field of electron-optical imaging, and particularly relates to a backscattered electron scintillator detector device and a detection method, which comprises a backscattered electron receiving sensor, an optical condensing group, an optical transmission group, a photoelectric conversion system and a detector protection mechanism. By using a scintillator as a sensor, a backscattered electron signal generated by an industrial electron gun electron beam is received, and then the electronic information carried by the backscattered electron is converted into an optical signal and transmitted to an area far away from the workpiece. Finally, a high signal-to-noise ratio voltage analog signal is formed by the photoelectric conversion system, avoiding the influence of spatial noise and other interference signals on weak signal transmission in the existing analog signal transmission process. For detailed topographic features, a backscattered electron image with high resolution can be displayed.

The application provides a new muon event identification method for a plastic scintillator muon camera imaging detector, comprising: obtaining a muon signal, preprocessing the muon signal, generating muon data, analyzing the muon data, and dividing into special muon events and conventional muon events; respectively testing the special muon events and the conventional muon events, determining valid muon events, storing the valid muon events in a data cache area, and when the number of stored muon events is greater than a preset threshold, outputting all muon events in the data cache area to an upper computer for imaging. According to the inherent characteristics of muons passing through the detection plane, the muon events are divided into conventional muon events and special muon events by using an inside-out scanning method, and the conventional muon events and the special muon events are respectively tested. On the basis of ensuring the existing muon event identification accuracy, the muon events in special situations can be identified.

The invention relates to a method for radiation detection chip angle response compensation. The method comprises the following steps: step 1, testing the counting rate of deposition of each channel of array SiPM when gamma rays have different incident angles; 2, according to a standard dose rate value and the counting rate of each channel of the array type SiPM at different incident angles obtained in the step 1, constructing a linear equation set; 3, solving the system of linear equations in the step 2 to obtain an angle response correction matrix; and 4, correcting the angle response of the chip according to the angle response correction matrix in the step 3. According to the invention, the angle response compensation of the thin-layer scintillator radiation detection chip on the directional dose rate of different incident angles is realized, and the problem of measurement deviation of the radiation detection chip caused by the change of the incident angle of the radiation source is solved.

The present invention provides: a scintillator which is reduced in the intensity of the afterglow, while having increased luminous intensity; and a charged particle radiation apparatus. A scintillator according to the present invention is characterized in that: a base material, a buffer layer, a light emitting part and a first conductive layer are sequentially stacked in this order; the light emitting part contains one or more elements that are selected from the group consisting of Ga, Zn, In, Al, Cd, Mg, Ca and Sr; and a second conductive layer is provided between the base material and the light emitting part.

A ceramic scintillator array 1 according to an embodiment of the present invention is provided with a plurality of scintillator segments 2 and a reflective layer. The reflective layer contains a resin composition. The resin composition contains a transparent resin and an additive. Dibasic acid esters serve as the additive.

This invention discloses a muon detector and a muon localization method and track reconstruction method, comprising a first scintillator layer, a second scintillator layer, and a third scintillator layer. The first scintillator layer includes multiple annular first scintillators stacked vertically in a cylindrical shape. The second scintillator layer includes multiple elongated second scintillators spirally and tightly wound around the outer wall of the first scintillator layer. The third scintillator layer includes multiple elongated third scintillators extending vertically, distributed circumferentially along the outer wall of the second scintillator layer. Compared with the prior art, this invention can improve the axial positioning accuracy of the muon detector, increase the detection range, and shorten the imaging time without increasing the complexity of the muon detector. Furthermore, it can perform geometric consistency discrimination for false triggering, crosstalk, or inconsistent combination events, thereby improving positioning stability and reliability.

A method and system for determining energy deposited in a scintillator detector are provided. Photons generated by an energy deposition event are detected by wavelength-resolving photodetectors, and individual photon wavelengths are recorded to form an observed spectral response. Calibrated and simulated spectral responses are generated and combined into a reference schema. An observed spectral response of an event being measured is analyzed against the schema to infer deposited energy. Timing and positional information of detected photons may also be recorded and used for auxiliary corrections. The invention is compatible with emerging wavelength-resolving photodetectors currently under development.

The invention relates to an experimental platform for particle accelerator material irradiation, which comprises a six-dimensional mechanical arm, a camera and light spot identification system, a rotary grasping clamp and an integrated control system, and is characterized in that the camera and light spot identification system is used for acquiring a particle beam light spot image on a scintillator in real time, and transmitting data to the integrated control system; the integrated control system accurately calculates the real-time spatial position deviation of the sample relative to the center of the irradiation beam; then the six-dimensional mechanical arm is driven to dynamically adjust the posture compensation deviation, and meanwhile, the rotary gripper is controlled to stably clamp the sample and rotate by 360 degrees, so that accurate and flexible positioning, uniform irradiation, stable clamping and real-time monitoring and correction of the sample are realized, and the precision, reliability and efficiency of an experiment are improved; and an efficient, stable and intelligent experimental tool is provided for particle accelerator material irradiation research.

The application discloses an online proton imaging ion spectrometer diagnosis system, relates to the fields of plasma physics and nuclear detection, and comprises an online proton imaging module, an online Thomson ion spectrometer module and a shielding aiming module; the shielding aiming module comprises a shielding cavity and an aiming laser pen; the online proton imaging module comprises a metal filter, a first scintillator and two proton imaging acquisition assemblies; the proton imaging acquisition assembly comprises a first optical fiber panel attached to the first scintillator and a first CMOS sensor attached to the first optical fiber panel; the online Thomson ion spectrometer module comprises an ion beam deflection mechanism and an ion spectrum diagnosis acquisition assembly; the ion spectrum diagnosis acquisition assembly comprises a light-proof aluminum film, a second scintillator, a second optical fiber panel and a second CMOS sensor which are sequentially and superposedly arranged. The application reduces the size of the whole system, can simultaneously carry out online proton imaging and ion energy spectrum diagnosis, and can effectively prevent radiation damage to the CMOS chip.

The image acquisition apparatus (1) of the present invention comprises: a camera (10) that scans and captures radiation passing through an object in one direction to acquire an X-ray image; a scintillator (11) disposed on the camera (10) to convert X-rays into light; and a control device (20) that inputs the X-ray image into a learned model pre-constructed using image data through machine learning and performs noise removal processing to remove noise from the X-ray image. The camera (10) comprises: a scanning camera (12) which is composed of pixel lines (74) having M (M is an integer greater than 2) pixels (72) arranged in one direction arranged in N columns (N is an integer greater than 2) in a direction orthogonal to one direction, and outputs a light-related detection signal for each pixel (72); and a readout circuit (73) that adds the detection signals output from at least 2 of the M pixels (72) for each pixel line (74) in the N columns of the scanning camera (12), and sequentially outputs the added N detection signals to output an X-ray image.

The invention discloses a TADF type compound as well as a preparation method and application thereof. The compound has a structural formula as shown in a formula I; the invention provides a series of TADF type compounds with novel structures, and the compounds can effectively improve the X-ray absorption capacity, can be used for preparing organic scintillator materials with low cost and low detection limit, and can be applied to X-ray imaging.