109 results about "Scintillator" patented technology

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.

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.

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 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.

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.

Embodiments of the present application provide a collimator module, a collimator, a detector module and an imaging device. The collimator module comprises a plurality of first shielding sheets, the plurality of first shielding sheets are arranged at intervals, the first shielding sheets extend along a first direction, and each of the first shielding sheets comprises a main body portion and a protruding portion extending from at least one end of the main body portion; and a plurality of second shielding sheets, the second shielding sheets extend along a second direction perpendicular to the first direction, and each of the second shielding sheets comprises at least one end shielding sheet connected to at least one end of the main body portion of the first shielding sheet, and the protruding portion of the first shielding sheet extends beyond the end shielding sheet. The protruding portion of the first shielding sheet can prevent the radiation passing through the gap between the collimator modules from irradiating some channels of the scintillator, so that the detector module can achieve imaging balance on all channels, and the imaging quality of the detector module is improved.

The application discloses a kind of scintillator decay time test methods based on waveform sampling, the steps of test method include: scintillator is coupled to the optical window of photomultiplier tube placed in shielding box, using radioactive source excitation sample, open oscilloscope automatic acquisition not less than 100 pulse signals and transmission to control computer;Pulse waveform data acquired by oscilloscope is handled calculation, obtains the decay time constant corresponding to single pulse data;The above steps are repeated for processing all collected pulse data, obtain decay time constant set;With decay time constant set histogram, data should present normal distribution;Using Gaussian function to the normal distribution is fitted, the decay time value corresponding to the peak obtained is the decay time of the sample.The application can accurately test the decay time of different scintillating materials, especially suitable for high-throughput decay time measurement.

Disclosed is an imaging apparatus comprising: a segmented scintillator structure; and a photocathode structure optically coupled to the segmented scintillator structure, for conversion of high-energy particles with an arbitrary spatial distribution to a corresponding distribution of photoelectrons, emitted with a spread in energy ranging from 100 meV to 1 meV. Also disclosed is an imaging apparatus comprising: a segmented scintillator structure, and a photocathode structure optically coupled to the segmented scintillator structure, for conversion of high-energy particles with an arbitrary spatial distribution to a corresponding distribution of photoelectrons, emitted with an angular spread ranging from 10 degrees to 0.1 degrees. Also disclosed is a pressureless filling of capillary tubes and nano-molds using electroosmosis effect.

This invention discloses a method for preparing and applying a gold cluster scintillator protected by a stable luminescent free radical ligand. The scintillator material uses (3,5-dichloro-4-pyridine)bis(2,4,6-trichlorobenzene)methyl free radical (PyBTM) as a ligand, and a chain-like tetranuclear free radical cluster is constructed using a one-pot method. The chemical formula of the compound is [Au4(PNP)2(PyBTM)2](SbF6)4, belonging to the triclinic crystal system, space group R-3. This free radical cluster scintillator achieves 100% theoretical exciton utilization and a short radiation decay lifetime due to its unique doublet emission mechanism. These properties make it an ideal candidate material for overcoming the contradiction between high luminous yield and fast response in traditional scintillators. Due to the excellent thermal and water-oxygen stability of this system, it can be fabricated into a scintillator screen to further achieve high-quality X-ray imaging with a spatial resolution of up to 31 LP·mm. ‑1 This provides a general design strategy for high-performance radiation detection materials.

A detection device according to the present invention comprises: a light detection unit provided with a photodiode; and a scintillator provided on a light detection surface side of the light detection unit. A thin film transistor provided in the light detection unit has an upper gate and a lower gate facing each other with an oxide semiconductor interposed therebetween, and is composed of a laminate including, in order from a structure far from the scintillator to a structure close to the scintillator: a first conductive film constituting the lower gate; a first inorganic film; a semiconductor layer constituting the oxide semiconductor; a second inorganic film; a second conductive film constituting the upper gate; a third inorganic film; a third conductive film constituting a source and a drain connected to the oxide semiconductor; a fourth inorganic film; a first organic film; a multilayer structure constituting the photodiode; a second organic film; a fifth inorganic film; and a third organic film. The source or drain is connected to the oxide semiconductor and a first electrode of the photodiode, the fourth inorganic film covers the first electrode and a portion of a second electrode, and a translucent fourth conductive film to which a non-translucent electrode is connected is formed in an opening where the second electrode is not covered with the fourth inorganic film.

A substrate processing apparatus includes a process chamber providing a process space, a stage located in the process chamber and configured to support a substrate, a window coupled to a side of the process chamber, and a scintillator layer coupled to one side surface of the window. The scintillator layer covers a portion of the one side surface of the window which is less than the full window surface. A second surface corresponding to another portion of the one side surface of the window is exposed. Light emitted by a plasma in the process space passes through the window and is collected by an optical system and analyzed. Ultraviolet light passing through the scintillator is converted to longer wavelength, generally visible, light. Comparing the light passing through the bare window with the light passing through the scintillator layer enables analysis of the plasma.

The application relates to a ratio type radiation sensing device with nonlinear response to dose rate and a use method thereof, and relates to a scintillator radiation measuring device with nonlinear change of luminous intensity and use method, and aims to solve the technical problems of low measuring precision, complex structure, poor reliability, poor real-time performance and poor applicability of existing radiation sensors. The ratio type radiation sensing device with nonlinear response to dose rate comprises an X-ray excitation module, a mixed sensing probe and a light signal collection module; wherein the mixed sensing probe is a round piece pressed by uniformly mixing NaLuF4:3Pr,5Er nanocrystals and NaLuF4:3Ce nanocrystals. The use method of the device is a standard curve method. The device can realize accurate detection in a wide range of 1.86-14.95 mGy / s, and can be used in the fields of environmental monitoring, biomedical imaging and public security inspection.

This enables higher resolution and higher sensitivity in X-ray line sensors. [Solution] A scintillator array 1 is composed of a plurality of scintillator pixels 2 that convert X-rays into light, wherein the plurality of scintillator pixels 2 are arranged in a straight line by partition walls 3 at equal intervals, and the widths of the first side walls 4 and the second side walls 5 at both ends are different, and when two scintillator arrays 1 are placed on top of each other in opposite directions, the scintillator pixels 2 of one scintillator array 1 and the scintillator pixels 2 of the other scintillator array 1 are offset by half a pixel.

The application discloses a preparation method and application of a rare earth cluster scintillator, and the scintillator material is prepared from 4,7-diphenyl-1,10-phenanthroline, 4-tert-butyl benzoic acid, titanium tetraisopropoxide and europium(III) acetate by a solvothermal reaction. The rare earth cluster scintillator material Eu2Ti4 prepared in the application has excellent flexibility and can be used for flexible imaging of non-planar materials. The minimum detection limit of the obtained scintillator is 32.89 nGy s ‑1 , which is 167 times lower than a standard medical diagnostic dose. The rare earth cluster scintillator process is simple, has high yield and fast crystal growth. The limit resolution of the Eu2Ti4-PDMS scintillation screen in the application exceeds 31 LP mm ‑1 at different temperatures, and the scintillation screen has excellent high-resolution X-ray radiation imaging capability and can be used as an ideal visualization tool for high-performance radiation imaging in extreme environments.

This invention discloses a dual-spectrum hierarchical architecture and CT detector based on X-rays, relating to the field of medical CT equipment technology. It includes: a scintillator layer capable of receiving high-energy X-rays and low-energy X-rays respectively; and several sets of metal sheets positioned on one end face of the scintillator layer, wherein the metal sheets can block high-energy or low-energy X-rays irradiating a portion of the scintillator layer. This invention solves the technical problems of complex structure, low yield, and high cost of existing dual-spectrum CT detectors.

At present, the perovskite scintillating material mainly faces the following two key problems: 1, lead-based perovskite is high in toxicity and easy to degrade in wet oxygen; and 2, microcrystals in a traditional zero-dimensional perovskite scintillation screen are not uniformly dispersed, so that the imaging resolution is influenced. The one-dimensional lead-free perovskite scintillation material Cs6Cu3AgBr10 is synthesized through a thermal injection method, and the flexible scintillation film is prepared in combination with a vacuum filtration method. The method aims at obtaining a thin film structure which is uniform in microcrystal distribution and smooth and compact in surface so as to optimize X-ray absorption and reduce scattering, and therefore a new material and process solution is provided for achieving high-spatial-resolution X-ray imaging.

A time-discriminated scintillator light output measurement method is disclosed: The scintillator light generated by the sample under test under radiation source excitation is converted into an electrical signal; the electrical signal is amplified, and the rise time and pulse height of the digitized waveform are discriminated, acquired, and stored, or the long-gate integral value Qlong and the short-gate integral value Qshort are obtained. The pulse discrimination value PSD is obtained based on the long-gate integral value Qlong and the short-gate integral value Qshort; a two-dimensional distribution histogram of the low-light-output scintillator is generated with Qlong as the abscissa and PSD as the ordinate; the obtained two-dimensional distribution histogram is processed accordingly and projected onto the X-axis to obtain the scintillator energy spectrum; the full-energy peak in the energy spectrum is Gaussian fitted to obtain the center value and half-peak width, and then the light output and energy resolution of the scintillator are calculated. This invention can accurately detect and calibrate scintillator signals with low light output, with fast data acquisition speed and high output accuracy.

A ion detector for a mass spectrometry apparatus is disclosed. The ion detector comprises: a microchannel plate (MCP), a scintillator, and a photomultiplier (PMT), the MCP comprising a MCP assembly and an isolation part fixed to the MCP assembly, the MPC assembly being configured to convert ions into electrons, the scintillator being configured to convert electrons into light, and the photomultiplier being configured to convert the light into an electrical signal. The isolation part of the MCP comprises at least one element, called isolation element, made of ceramic.

This invention relates to the field of X-ray imaging technology and discloses an X-ray imaging scintillator screen based on chiral perovskite nanocrystals and its fabrication process. The screen comprises: a flexible transparent substrate made of polyethylene terephthalate or polyimide film; a chiral perovskite nanocrystal composite layer; an inorganic oxide protective layer composed of SiO₂ or Al₂O₃; and a composite reflective layer comprising: a TiO₂ nanorod array layer located on the substrate surface; and a reflectance enhancement layer doped with 1-10 vol% rhodamine 6G or coumarin derivatives covering the surface of the TiO₂ nanorod array layer. By using a high-transmittance, low-roughness polyester or polyimide material on the flexible transparent substrate, combined with the surface-grown TiO₂ nanorod array and chiral perovskite nanocrystal composite layer, the light reflection efficiency and imaging contrast are significantly improved. Furthermore, the optimized light extraction path, achieved through a microprism structure, enhances the efficiency of X-ray conversion to visible light.

The application relates to the technical field of scintillator screen and discloses a flexible scintillator screen with low-dose X-ray imaging performance and a process thereof, which comprises a high-efficiency 2D perovskite scintillator material layer, a transparent conductive polymer layer and a flexible substrate, the high-efficiency 2D perovskite scintillator material is Cs2AgBiBr6, the flexible substrate is a polyimide film or a PET film, the transparent conductive polymer layer is arranged on one side or both sides of the high-efficiency 2D perovskite scintillator material layer, and the transparent conductive polymer layer material is PEDOT:PSS or PANI. The low-dose X-ray imaging performance is improved through the micro-nano structure and the gradient structure; the micro-nano structure can control the propagation and emission direction of the scintillator light emission, improve the light extraction efficiency or the detection sensitivity; the gradient structure matches the intensity difference of the X-ray penetrating object, avoids signal saturation or loss, and optimizes the light collection efficiency and the imaging quality.

This invention discloses a sub-picosecond ultrafast scintillator, its preparation method, and its applications. The invention employs ligand-assisted deposition and high-temperature thermal injection to prepare all-inorganic metal halide perovskite CsPbCl3 nanocrystals. Through size optimization and ligand engineering, a strategy is proposed to passivate shallow defect levels, reducing the carrier residence time in shallow defect states while appropriately retaining deep defect levels. This achieves exciton recombination path renormalization in the nanocrystals, ultimately realizing ultrafast scintillation of <100 ps at room temperature.

Downhole tools and processes for using same to detect radiation via scintillation. In some embodiments, the downhole tool can be deployable in a wellbore that traverses a formation. The downhole tool can include a tool housing configured for movement within and along the wellbore. The downhole tool can include a radiation detector that includes a scintillator material disposed within the tool housing. The scintillator material can include a cerium-activated gadolinium pyrosilicate. In some embodiments, the cerium-activated gadolinium pyrosilicate can have a chemical formula of: (Gd1-x-yCexAy)2Si2O7, where: x can be equal to 0.001 to 0.08, y can be equal to 0 or can be a number from 0.0001 to 0.079, if y is >0, A can include at least one rare-earth element selected from the group consisting of: Sc, Y, La, Pr, Nd, Pm, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb, and Lu, and 1-x-y can be ≥0.92.

The application relates to a method for processing muon detection data of a triangular prism scintillator. S1: obtaining uncorrected energy deposition information and uncorrected hit position of each muon event in each layer detection unit; S2: based on the actual structure parameters of the detector, performing geometric correction on the traditional centroid algorithm; S3: based on the statistical relationship between the energy deposition of the muon in the scintillator and the track length, establishing a signal channel gain coefficient model, and correcting the energy response of each detection channel; S4: based on the fitting results of the muon track length and the energy of each channel, determining the energy consistency standard, and performing rejection processing on the muon events determined as abnormal; S5: performing muon track reconstruction and imaging, evaluating the position resolution of the detector, and if the convergence condition is reached, ending, otherwise returning to S2 for iteration. The technical scheme can improve the muon track reconstruction accuracy and imaging quality through geometric structure correction, energy correction and abnormal energy event screening.

The present invention facilitates manufacturing of a scintillator array, a radiation detection device, and a positron emission tomography device. A scintillator array (11) is provided with at least one pair of scintillators (11Uia, 11Uib), a light reflection member (LA) disposed in a first location between the scintillators for preventing light from passing between the scintillators, and an air layer (LB) disposed in a second location between the scintillators for allowing light to pass between the scintillators.

The application discloses a kind of metal halogen perovskite-based neutron multiplicity measuring device and method, the device includes: shell, the shell is used to install and protect other components of the measuring device;Radiation detection module is arranged in the shell, and the radiation detection module is mainly composed of perovskite material and photomultiplier tube etc.;Shielding unit is arranged in the shell and located at the side and bottom of the perovskite scintillator, for reducing gamma-ray background;And, readout electronics module is arranged in the shell, and the readout electronics module is used to read the electrical signal generated by the photomultiplier tube and convert it into digital signal output.The application can realize the effective discrimination of neutron and gamma, so as to accurately deduct the influence of gamma-ray background, improve the sensitivity of fast neutron measurement.

The application discloses a kind of scintillation detector monitoring method, device, equipment and medium, the method includes: the light-emitting lifetime of original scintillator in scintillation detector is obtained;If light-emitting lifetime is greater than preset light-emitting lifetime threshold, replacement instruction is sent to replace original scintillator with target scintillator, so that the light-emitting lifetime of target scintillator is within preset light-emitting lifetime threshold, wherein the dielectric constant of organic layer in target scintillator is less than the dielectric constant of organic layer in original scintillator.By replacing original scintillator, the target scintillator after replacement has an organic layer with a lower dielectric constant than the original scintillator.By using an organic material with a smaller dielectric constant for the organic layer without changing the inorganic layer, the light-emitting lifetime of the scintillator can be effectively reduced to meet the demand for higher time resolution in the field of radiation detection.This method is simple and effective, and has a significant effect on improving the time resolution in the field of radiation detection.

This invention belongs to the field of scintillator material preparation technology, specifically relating to a method for purifying high-purity cesium iodide and its application in the preparation of cesium iodide scintillator screens. The method involves sequentially mixing and heating cesium iodide-containing waste and residual materials to dissolve them, filtering and removing impurities, adsorption and removing impurities, concentrating and temperature-controlled crystallization, centrifuging, drying, and vacuum packaging. This process comprehensively removes solid particulate impurities, elemental iodine, and various trace metal ions from the raw materials, effectively preventing oxidation and deterioration during purification. The method is simple to operate, highly industrially feasible, and can purify waste materials to a high purity level that meets the requirements of high-performance applications. It allows for the reuse of waste materials at the same purity level, reducing production costs, alleviating raw material supply pressure, and complying with environmental protection requirements. Applying the high-purity cesium iodide obtained by this method to the preparation of cesium iodide scintillator screens using a vacuum thermal evaporation process ensures the excellent performance of the scintillator screens, making them suitable for high-end fields such as medical imaging and non-destructive testing.