48 results about "Radiation x" patented technology

X-ray radiation is transmitted through and scattered from an object under inspection to detect weapons, narcotics, explosives or other contraband. Relatively fast scintillators are employed for faster X-ray detection efficiency and significantly improved image resolution. Detector design is improved by the use of optically adiabatic scintillators. Switching between photon-counting and photon integration modes reduces noise and significantly increases overall image quality.

A containers/vehicles inspection system with adjustable radiation X-ray angle relates to the technical field of radiation inspection. The present invention comprises a detector arm rack equipped with detectors, a second collimator, a pulling device, and an accelerator rack with the accelerator. X-ray produced by the accelerator is right opposite to the calibrator, the first collimator and the second collimator all of which are arranged in order, wherein, said accelerator rack is further composed of a horizontal regulation mechanism for moving the base forward and afterward horizontally, a vertical regulation mechanism for moving the bending framework up and down vertically, a rotary regulation mechanism for rotating the cantilever, a pitching regulation mechanism for driving the accelerator to make pinching movement, as well as a framework formed by a base, a vertical arm, a bending framework and a cantilever. Compared with the prior arts, the present invention is advantageous in reasonable structural design, convenient use and high imaging quality, especially satisfactory effect of focused inspection to some suspicious areas. So it is the necessary equipment for inspecting the Customs goods.

This invention provides a nanometer grating used in polarized splitting and combination beam and its process method. The metal grating bar is located in the ditch bottom of the nanometer grating and it deposit a layer of protective film with same quality with upper layer of the grating structure. The process method are the following: 1, first to make nanometer grating by use of synchronization radiation X-ray light etching method; 2, to unromantically coat a metal film with high reflection on the surface of nanometer grating; 3, to remove the metal film on the back of the optical grating by use of ion beam inclined etching method; 4, to cover material with same quality with underlay on the grating surface. The metal grating surface can have an ideal solid surface and reliable protective cover.

The invention relates to the field of material structure research and performance in-situ test, and specifically relates to a synchronous radiation X-ray diffraction in-situ stretching device and an application method thereof. The device comprises three main components of a loader, a driver, and a fixing support. The loader is mainly manufactured by using high-strength aluminum alloy or titanium alloy, and comprises a pedestal, a load driving part, a load transmission part, a sample fixture part, a stretch sensor part, and a slide guide rail part. The driver is an integration of a data collection card and a motor driver, and is independent from the loader. The fixing support is manufactured from high-strength aluminum alloy, and has a detachable interface on the lower part. The device is designed based on an X-ray reflective optical path principle. Sample loading fixture and load sensor heights satisfy requirements. The device can be effectively applied in in-situ microstructure and performance integral tests. With the device, a dynamic process of stress and strain distribution of various phases of a material can be subjected to in-situ observation by using high-energy X-rays, and material mechanical performance mechanism can be analyzed on a micro-phase size.

A circuit arrangement of a quanta-counting detector with a multiplicity of detector elements is disclosed, wherein the X-ray quanta registered in each detector element generate a signal profile. In at least one embodiment, the circuit arrangement, in each detector element, includes: at least one first comparator with a first energy threshold lying in the energy range of the measured X-ray quanta and at least one second comparator with a second energy threshold lying above the energy range of the measured X-ray quanta, the at least one first and second comparators being connected to the detector element. Further, the at least two comparators have a logical interconnection, wherein at least a first comparator and a second comparator are connected to the inputs of an XOR gate, and each XOR gate connected to a first comparator is connected to precisely one edge-sensitive counter. Further, in at least one embodiment, an application-specific integrated circuit (ASIC) and an emitter-detector system of an X-ray CT system, including at least one circuit arrangement, are disclosed.

The invention relates to a computer tomography imaging technique, especially a synchronous radiation X-ray phase contrast CT imager and test method, wherein it is formed by monochromator crystal, sample table, analysis crystal, ionize room, and image detector; the sample table is formed by three rotations and two translations; the method comprises that S1 , finding the image conditions of phase contrasts in different image modes; S2, obtaining phase contrast CT test data; S3, rebuilding the test data.

Before a radiation image is captured, a rate of change of an output signal from an integrator, during a given period of time after the integrator has been reset and until a radiation start signal is supplied, is calculated. An offset voltage signal at a desired time is calculated using the rate of change, and is supplied to a voltage correcting circuit. An output signal from the integrator after a radiation X has started being applied to a subject is corrected based on the calculated offset voltage signal. The corrected output signal from the integrator is supplied to an X-ray tube controller for controlling application of the radiation X to the subject.

X-ray CT system is provided that reduces waiting time for shuttle scanning, comprising: top-plate moving unit; rotary moving unit; data acquisition system; and control unit. Top-plate moving unit displaces top plate to reciprocate in a direction from a starting point to an ending point and in the direction from the ending point to the starting point. Rotary moving unit drives X-ray radiator radiating X-rays to revolve around the subject. Data acquisition system detects X-rays passed through the subject and to gather projection data. Controller controls at least top-plate moving unit so that, during a scanning with X-rays, while projection data are gathered with reciprocating movement of top plate between the starting point and the ending point and with X-ray radiator being driven to make revolving movement, the duration required for reciprocation of the top plate movement being an integral multiple of revolution period of the revolving movement of X-ray radiator.

A radiation application time upper limit calculator calculates a radiation application time upper limit based on a subject thickness, as measured by a subject thickness measuring unit. While an X-ray tube is controlled according to exposure conditions that have been set in order to apply a radiation X to a breast to capture a radiation image thereof, an X-ray tube controller compares the applied radiation time with the radiation application time upper limit. If the applied radiation time exceeds the radiation application time upper limit, then application of radiation to the subject is interrupted, so as to prevent an inappropriate radiation dosage from being applied to an X-ray detector.

This invention relates to a high energy x-ray photo taken device for changing films automatically. A film box is set on the base closely storing films composed of a shell connected with the plane on the base and a moving film frame closely locked with the shell. Multiple films are vertically and uniformly distributed on the frame, bottom of the frame is connected with a slewing gear driving the frame rotate, bottom of the slewing gear is connected with a drag gear horizontally fixed at the base. Said bracket is scarfly jointed on the middle of the frame by the horizontal slideway above the film box, claws with lifting structure are lifted vertically mounted on the bracket capturing films, a lifting unit and a pull unit are set between the bracket and the frame driving the bracket move vertically and horizontally.

The invention discloses a portable testing device of hydrogen storage material in-suit high-pressure hydrogenation and dehydrogenation synchronous radiation X ray powder diffraction. The portable testing device comprises commercially available gas cylinder high purity hydrogen, a gas draining pipe, filtering sheets, an oil-less vortex pump, manually operated high pressure valves, a sheathed heating wire, a platinum resistor, a metal hydride pressurizing vessel, hydrogen pressurizing alloy, a safety valve, a high pressure sensor, an electrically operated high pressure valve, a capacity expanding gas cylinder, high energy synchronous radiation X ray, a K-thermocouple, a single crystal Al2O3 capillary tube, a heating rod, an amorphous silicon surface detector, and a data acquisition and control system. The portable testing device is capable of solving problems in the prior art that high pressure hydrogenation under a pressure of 20MPa or higher is impossible to realized by similar devices, the quality of obtained diffraction spectrum data is poor, capillary tube recycling is impossible to realize, and the structure is large and is not portable. The portable testing device is capable of promoting acquaintance of people on hydrogen storage material hydrogenation and dehydrogenation mechanisms, and important significance on development of novel high pressure hydrogen storage material is achieved.

The invention provides a tension platform for synchronous-radiation light source CT (computed tomography) imaging, and relates to a tension platform. The tension platform aims at solving the problem of failure to observe and study the crack generation and expansion process of the structural material under the function of external force by the traditional analysis method in situ and in real time; by adopting the synchronous-radiation X-ray CT imaging, the internal defect of a millimeter-level specimen can be observed and analyzed by using high penetration ability; the cracking process can be observed in situ on the synchronous-radiation CT imaging line station; the tension platform is not available in the prior art. The tension platform comprises a first positive and reverse screw rod, a lower clamp bearing block, an X-axis displacement adjusting mechanism, a Y-axis displacement adjusting mechanism, an upper clamp rotary shaft, an upper connecting clamp, a force sensor, a second positive and reverse screw rod, a drive motor, a worm, two worm wheels, two sliding block fixing plates, two rotary bodies with motor drive mechanisms, two rotary body connecting shafts, two flexible couplings, two clamps and four guide rail sliding blocks. The tension platform belongs to the field of tension of light source imaging.

The invention relates to an X-ray wavelength dispersion and diffraction based hazardous article detection method in the technical field of X-ray application. In the invention, a limit crack is arranged on the emergent surface of a sample, on-line detection is carried out by using a Mo or Ag target characteristic radiation X-ray transmission-type wavelength dispersion and diffraction method, and areflecting type X-ray wavelength dispersion and diffraction method is used for site identification. The method can be used for detecting a hazardous article of a small bag and finally judging the hazardous article is what kind of explosive or poison; the direct detection thickness is from a few centimeters to scores of centimeters, and because the detection part is a small size part of the bag, the size of an actual object to be measured is larger; through the on-line inspection by the transmission-type X-ray wavelength dispersion and diffraction and site identification by the reflecting typeX-ray wavelength dispersion and diffraction, an object to be detected can be completely and correctly judged to be what kind of substance, and packaged objects can be separated from the hazardous article, which cannot be realized through any other non-diffraction method and is unmatched.

Systems and methods for low energy radiation x-ray radiation therapy system for use at a target within a cavity of a subject. In an aspect, the system uses an aperture shaping device used to shape the radiation beam from the low energy radiation source. In an aspect, the aperture shaping device includes a plurality of leaf assemblies which include leaves configured to form the aperture and engage the radiation beam. In an aspect, the present invention utilizes a geared mechanics approach to create an aperture using only one dial input. The design ensures that the field size of the collimator remains a constant shape as it is opened and closed. In an aspect, the overall size of the collimator may be scaled to accommodate various radiation therapy requirements.

The invention discloses a vehicle-mounted anti-radiation X-ray camera system. For the vehicle-mounted anti-radiation X-ray camera system, a front isolation board and a rear isolation board are arranged in a compartment side by side, a front window is formed in the front isolation board, a rear window is formed in the rear isolation board, a physical examination area is formed among the front isolation board, the rear isolation board, side isolation boards, as well as the top wall and a terrace of the compartment, a DR flat-panel box is slantwise arranged in the physical examination area, a lifting box is arranged on the bottom of the DR flat-panel box, and a stand platform is movably arranged at the front side of the lifting box; an X-ray area is formed among a front side board I, a front side board II, a bottom board I, an end board, the front isolation board and the top wall of the compartment, and an X-ray bulb tube is arranged in the X-ray area; and an emission area is supported in the rear upper direction of the rear window through a bracket. For the system provided by the invention, X-ray shooting is carried out on the position of the examined area by lifting an examined person, and the trapezoid-type lead plate protection of the X-ray area can effectively limit the emission direction of complement lines on the periphery of a main shooting beam of the X-rays; the X-rays penetrating through the rear window emit towards the tail and the top of the compartment after entering the emission area, and thus the integral protection quality is promoted.

The invention belongs to the field of pipeline crack detection technologies and particularly discloses reducing pipeline crack detection equipment. The equipment comprises walking wheels, turnable telescopic connecting rods, stretchable pressure sensor systems, a three-dimensional scanning system, a signal processing system, a power system, a circumferential radiation X-ray flaw detector, two hooks, wires and a shell, wherein the three-dimensional scanning system is arranged at the left side of the shell, the turnable telescopic connecting rods are arranged in an articulated mode on an upper part and a lower part of the shell, the walking wheels are arranged on the turnable telescopic connecting rods respectively, the stretchable pressure sensor systems are arranged on the upper part and the lower part of the shell respectively, the circumferential radiation X-ray flaw detector is located at the right side of the interior of the shell, the signal processing system is arranged at the left side of the interior of the shell, the power system is arranged beside the signal processing system, and the two hooks are arranged at the left side and the right side of the shell respectively. The equipment can detect reducing pipeline cracks and is simple in structure, convenient to move and convenient to operate.

The invention discloses a high-entropy alloy of a double-layer close-packed hexagonal structure, and belongs to the technical field of rare earth alloy materials. The high-entropy alloy of the double-layer close-packed hexagonal structure is LaxCexPrxNdx, wherein x is atomic number percentage and is equal to 25; or the high-entropy alloy is LaxCexPrxNdxSmx, wherein the atomic number percentage x is equal to 20. The high-entropy alloy is prepared through smelting by means of a high-vacuum arc smelting furnace under high-purity argon protection conditions. The high-entropy alloy is prepared fromlight rare earth elemental lanthanum, cerium, praseodymium, neodymium and samarium (La, Ce, Pr, Nd and Sm). The X-ray diffraction spectrum of the high-entropy alloy is obtained through an X-ray diffractometer, and it is confirmed that the crystal structure of the prepared light rare earth high-entropy alloy is the double-layer close-packed hexagonal structure. The in-situ high-pressure synchronous radiation X-ray technology is utilized to confirm that the alloy has face-centered cubic (fcc) and distorted face-centered cubic (dfcc) high-voltage phase structures at high pressure.

The invention discloses a high-flux material synthesis and synchronous radiation light source high-flux representing method of a composite material chip. A preparation method of the chemical compositematerial chip and a high-flux material preparation and representation combination system combined with synchrotron radiation light source X-ray diffraction station high-flux representation are utilized. Metal alkoxide, nitrate, acetate and chloride can be adopted as raw materials. According to the method, hundreds or thousands of samples can be prepared through a chemical method at a time, and the number of the samples can be regulated and controlled according to experiment needs. The crystal structure of the material can be fast and efficiently tested and analyzed through a synchronous radiation X-ray diffraction station high-flux representation automation platform. According to the preparation and representation system formed by combining a chemical composite material chip method and the high-flux representation automation platform, the preparation and representation speed of an inorganic material can be greatly increased, and the utilization efficiency of a synchronous radiation light source can be improved.