428 results about "Scintillation" patented technology

A high efficiency radiation detector employs longitudinally extending converter elements receiving longitudinally propagating radiation to produce high-energetic electrons received by detector structures in interstitial spaces. The secondary electron generation in this architecture allows great freedom in selection of converter materials and thickness. A variety of detector mechanisms may be used including ionization-type detectors or scintillation-type detector.

Scintillation materials of this invention have an alkali halide host material, a (first) scintillation dopant of various types, and a variety of second dopants (co-dopants). In another embodiment, the scintillation materials of this invention have an alkali halide host material, a (first) scintillation dopant of various types, a variety of second dopants (co-dopants), and a variety of third dopants (co-dopants). Co-dopants of this invention are capable of providing a second auxiliary luminescent cation dopant, capable of introducing an anion size and electronegativity mismatch, capable of introducing a mismatch of anion charge, or introducing a mismatch of cation charge in the host material.

The invention, which relates to the liquid crystal display panel driving technology field, discloses a method for driving a liquid crystal display panel in a polarity-reversal mode and an apparatus thereof. The method comprises the following steps that: four frames form a polarity-reversal driving period and any of the four frames with a polarity arrangement mode can be used as an initial frame; and a displayed image is scanned in the way of a right order or a reversed order of the four frames. Besides, polarity arrangement modes of the first frame and the third frame in the polarity-reversal driving period are identical and the polarities thereof are opposite; polarity arrangement modes of the second frame and the fourth frame are identical and the polarities are opposite; and the polarity arrangement mode of the first frame is different from the one of the second frame. In addition, the invention also provides an apparatus for realizing the method. According to the designed driving scheme, occurrences of scintillation and crosstalk phenomena that occur on a liquid crystal display panel when a certain picture is displayed can be reduced.

A detector for detecting radiation, the detector comprising: a plurality of elongate scintillator segments arranged in a side by side array; and at least one pair of light sensors optically coupled to ends of each of the elongate scintillator such that they receive light from scintillations produced in the scintillator and generate electrical signals responsive thereto.

The invention comprises a system for controlling a charged particle beam shape and direction relative to a controlled and dynamically positioned patient and/or an imaging surface, such as a scintillation plate of a tomography system and/or a first two-dimensional imaging system coupled to a second two-dimensional imaging system. Multiple interlinked beam/patient/imaging control stations allow safe zone operation and clear interaction with the charged particle beam system and the patient. Both treatment and imaging are facilitated using automated sequences controlled with a work-flow control system.

An optical field sensing system and an associated method are provided that are tolerant of scintillation. The system includes a wavefront sensor that measures gradients across a wavefront at a first resolution defined by the subapertures of the wavefront sensor. The system also includes an intensity sensor that measures the intensity across the wavefront at a higher resolution. The system further includes a wavefront processor that determines respective phases across the wavefront. In addition to the gradients and the intensity measurements, the wavefront processor may determine the respective phases based also upon the noise affiliated with the measurements. In this regard, the wavefront processor may determine the respective phases across the wavefront at least partially based upon the gradients as adjusted by weights that are based upon the intensity measured by the intensity sensor and are influenced by evidence of scintillation.

The invention relates to a method for determining an atmospheric turbulence parameter based on measurement of an M<2> factor and a light scintillation index and an experimental apparatus thereof, and belongs to the field of laser space communication. The method comprises the following steps of: performing collimating and beam-expanding on a Gaussian beam emitted by a laser by an optical transmitting antenna and transmitting, allowing the emitted Gaussian collimated beam to pass through atmospheric turbulence and receiving the emitted Gaussian collimated beam by an optical receiving antenna; splitting the received beam into two beams, of which one passes through an M<2> factor measuring apparatus and the other path passes through a light scintillation measuring apparatus; and finally determining the atmospheric turbulence parameter by using the measured M<2> factor and light scintillation index. The experimental apparatus for implementing the method comprises the laser, the optical transmitting antenna, the optical receiving antenna, a beam splitter, the M<2> factor measuring apparatus, the light scintillation measuring apparatus and a data processor. Through the method and the experimental apparatus of the invention, the atmospheric turbulence refractive index structure constant and scale parameter in the atmospheric turbulence are determined, and the experimental apparatus has a simple structure and is convenient to operate and measure.

The invention discloses a multifunctional X-ray orientation device and a method, and belongs to the field of single crystal material processing. The multifunctional X-ray orientation device comprises a working table, a radiation-proof protection cover, an X-ray generating system, a diffracted-ray receiving system, a crystal sample rotating table and a computer control system. A sample containing table in the crystal sample rotating table can be replaced through detachable bolts. The method includes the steps that the multifunctional X-ray orientation device is used to carry out crystal defect identification, different crystal characteristic measurement, manual orientation measurement and angle error obtaining. The multifunctional X-ray orientation device is integrated with an X-ray orientation device measurement system for a plurality of single crystals, the device cost is reduced, and the product homogeneity is guaranteed; detection data of all single crystal materials is fused and finished, the defect types of the single crystal materials are obtained in an intelligent mode, and the utilization efficiency of existing data is improved; a scintillation detector is used as an X-ray detector, the stability degree is high, the anti-interference capability is high, and the defects of a Geiger pipe are recovered.

A bundle of drawn fibers that have X-ray scintillating unagglommerated nanocrystallite particles in plastic or glass cores of down to 0.1 micron spacing and claddings of X-ray absorbing compounds in the cladding composition. Optional is a cover to the bundle that blocks light from leaving the bundle at the X-ray side while allowing X-rays to pass into the cores. To image the light exiting the fiber bundle at the sub-micron level, light expansion is preferable using either a lens system or a fiber bundle expander.

An x-ray radiography tomography device for a flexible riser, particularly a riser end fitting on a riser hangoff block on a petroleum platform, the x-ray radiography device comprising the following features: a) an x-ray source (1) of about 6 to 9 MeV arranged for directing said x-rays generally through an adjacent and an opposite sidewall portion of said riser; b) a collimator (2) arranged between said x-ray source (1) and said sidewall of said riser pipe being adjacent to said source (1), said collimator (2) arranged for directing radiation said x-rays in a beam fan generally extending in a plane perpendicular to a long axis of the riser; c) a sensor array (3) for receiving said x-ray beam fan after passage throug said riser pipe, said array comprising a plurality of scintillation detectors (30), said sensor array (3) arranged generally opposite of said source (1) with respect to said riser tube, and extending along a line extending generally perpendicular to said axis of said riser; d) an internal frame (7) for rotating the x-ray source (1), the collimator (2) and the sensor array (3) generally about said axis of said riser, said framework arranged on a circular guide rail (10) mounted around said flexible riser hangoff block.

An improved fast neutron detector fabricated with alternating layers of hydrogenous, optically transparent, non scintillating material and scintillating material. Fast neutrons interact with the hydrogenous material generating recoil protons. The recoil protons enter the scintillating material resulting in scintillations. The detector is optically coupled to a photomultiplier tube which generates electrical pulses proportional in amplitude to the intensity of the scintillations, and therefore are an indication of the energy of the fast neutrons impinging upon the detector. Alternating layers of materials are dimensioned to optimize total efficiency of the detector, or to optimize the spectroscopy efficiency of the detector. The scintillating material is preferably ZnS, and the hydrogenous material is preferably plastic. The detector is ideally suited for well logging applications and fast neutron monitor applications.

The invention relates to an airport runway foreign matter radar monitoring system, a monitoring method and a monitoring device. The airport runway foreign matter radar monitoring system comprises a rotating device and a detection rotating arm device. The detection rotating arm device is arranged on the rotating device and is driven by the rotating device to rotate; the detection rotating arm device comprises a transmitter, a receiver, a frequency synthesizer, a data acquisition module and a signal processing module; the frequency synthesizer is connected with the transmitter and the receiver respectively; the receiver, the data acquisition module and the signal processing module are connected in sequence; and the signal processing module is connected with a computing platform. By using theimaging and detection method based on an arc synthetic aperture radar system, the noise interference of scintillation clutters can be effectively reduced, and possible interference items can be effectively filtered out; and meanwhile, the height factor between the detection rotating arm device and a target object is fully considered, the spatial position of the target object can be determined more quickly, and the detection capability is improved.

The invention belongs to the technical field of application of all-inorganic metal halide nanocrystals, and discloses application of a non-self-absorption nanocrystal as a scintillator and a preparation method of the non-self-absorption nanocrystal. The chemical general formula of the nanocrystal is Cs3Cu2X5, and X is selected from Cl, Br and I. The preparation method of the scintillator comprisesthe following steps: coating a glass sheet with an organic solution of Cs3Cu2X5 nanocrystalline, and naturally volatilizing an organic solvent in air to form a Cs3Cu2X5 nanocrystalline film which canbe used as the scintillator. The Cs3Cu2X5 nanocrystalline thin film is prepared to serve as a scintillator to be applied to X-ray imaging, the efficient scintillation performance is shown, and meanwhile the Cs3Cu2I5 nanocrystalline scintillator is applied to X-ray imaging, and the very high resolution is shown as high as 0.32 mm. The preparation method is simple in preparation process, easy to implement and low in cost, and has important application value and important prospect in medical diagnosis, national defense industry and manufacturing industry. And meanwhile, the defects of the traditional lead-containing halogen perovskite nanocrystalline can be overcome.