17 results about "Photon radiation" patented technology

The invention relates to a gas discharge detection method, system and equipment based on an ultraviolet spectrum and a medium. The method comprises the following steps: transmitting a frequency-modulated ultraviolet light beam to a gas chamber to be detected, synchronously collecting and processing a transmission light signal in a branching manner, and simultaneously obtaining a modulated spectrum signal for gas absorption analysis and a discrete photon pulse signal for detecting a discharge event; respectively processing the two paths of signals, and extracting sulfur dioxide concentration information and photon radiation characteristics; fusing the two types of features to construct a dynamic feature vector, and obtaining a discharge state grade by using a dynamic Bayesian network diagnosis model; and finally, combining the concentration and state information, and outputting the membership degree of the discharge duration through fuzzy logic. By adopting the method, the fast process and the slow process of partial discharge can be cooperatively monitored, and the early detection sensitivity and the diagnosis reliability are improved.

The application belongs to the field of turbine blade thermal barrier coating of an aero-engine. Specifically, it is a structure design, a preparation method and a prepared coating of a double-layer radiation-resistant thermal barrier coating with a high-reflection layer and a high-absorption layer. The coating comprises a high-absorption layer and a high-reflection layer. The high-absorption layer can absorb part of the energy of photon radiation and re-emit it into the environment, while relying on a cooling gas film to quickly remove heat. Part of the energy of the photon radiation is reflected by the high-reflection layer again to the high-absorption layer after passing through the high-absorption layer, and the process of absorption-emission-cooling gas film heat dissipation is repeated. Within a set temperature range, the absorption rate of the high-absorption layer is determined based on the temperature difference requirement between the inner and outer surfaces of the thermal barrier coating, and the high-absorption layer material is determined based on the absorption rate. The application greatly reduces the radiation heat flow penetrating the coating, avoids the direct heating of the high-temperature alloy by infrared radiation, and significantly improves the heat insulation capacity of the thermal barrier coating and the service life of the turbine blade.

The invention relates to a thermophotovoltaic device, comprising: - an absorber layer configured to absorb photonic radiation, particularly daylight, within a focal spot as a part of a surface of the absorber layer and convert it into heat energy; - an emitter layer positioned adjacent to the absorber layer or integrally formed with it, configured to emit thermal radiation due to the heat energy via a surface of the emitter layer; - at least one photovoltaic cell positioned to receive the emitted thermal radiation from the emitter layer and convert it into electrical energy using the photoelectric effect; - a heat spreading layer embedded within the absorber layer and / or emitter layer configured to distribute heat energy lateral over the emitter surface.

The application discloses a micro integrated multi-radiation detection device, a detection method and a calibration method, relates to the field of radiation detection, and aims to realize micro integration of a multi-radiation detector. The device comprises: a heterogeneous detection layer which is formed by stacking or partitioning and isolating a plurality of sub-detection layers which are respectively adapted to the radiation sensitivity and thickness requirements of particles, particles, photons and photons, so as to respectively establish corresponding incident conditions and detection paths for different types of radiation; and a detection circuit which is connected to the heterogeneous detection layer and respectively acquires detection signals of the sub-detection layers, so as to be used for identifying detection events. The application proposes a cooperative solution which takes into account micro integrated structural design, stable electric field, low-noise sampling, wireless coexistence, event discrimination and engineering manufacturability.

The application provides a temperature gradient monitoring method and system for bismuth target dissolution reaction, relates to the technical field of data monitoring, and comprises the following steps: step 1, acquiring energy deposition density distribution data and nuclide activity data along the axial and radial directions inside the bismuth target, and converting the nuclide activity data into nuclide mass data at corresponding positions; step 2, based on the nuclide mass data, calculating the intensity of a photon source term generated by a spallation reaction inside the bismuth target and corresponding energy group division results, inputting the intensity of the photon source term and the corresponding energy group division results into a photon transport calculation model to perform photon transport calculation, and obtaining a photon radiation dose equivalent rate distribution outside the target body. The application eliminates radiation interference, accurately characterizes the three-dimensional non-uniform distribution of heat sources inside the bismuth target by dividing nested three-dimensional subspace domains, constructing a three-dimensional closed vortex loop and combining a comprehensive correction factor with a photoacoustic signal temperature effect correction, and realizes real and reliable monitoring of the axial and radial temperature gradients in the bismuth target dissolution reaction.

The embodiment of the invention discloses a high-energy photon ray detection device and a preparation method thereof, which can be used in the field of semiconductor devices, and the device comprises a detector chip, a processor chip and a protective layer. The detector chip and the processor chip are stacked in a three-dimensional manner; and the protective layer surrounds the processor chip and is used for isolating high-energy photon rays. Therefore, the protection layer is arranged between the detector chip and the processor chip which are stacked in a three-dimensional manner, so that the processor chip is surrounded by the protection layer, high-energy photon rays from the direction of the detector can be accurately intercepted, and the generation of an ionization effect is blocked from a ray propagation path; the probability of defects such as oxide layer charge traps and leakage current increase of a processor chip is effectively reduced, the failure risk of the device is remarkably reduced, and the service life of the high-energy photon ray detector is prolonged.

This invention relates to a ceramic module for assembly into a therapeutic device for treating a human or animal body with irradiation of far infrared. More specifically, said ceramic module can simultaneously emit blackbody-like thermal radiation and stimulated FIR-photons radiation in 3-16 μm wavelength spectrum, while the overall radiation in 8-14 μm wavelength range is measured to be an approximated blackbody radiation at a temperature that is at least 1° K (or 1° C.) higher than the actual body temperature of said ceramic module, signifying an effective emissivity greater than 1.0. Said ceramic module may be used alone or serve as components of a therapeutic device for increasing physiologic performance, immune competence, health, and mean lifespan of human or animal.

A single photon radiation detector is designed for a particular radiation source fluence, such that an incident radiation photon strikes a scintillator monolith, creating scintillation photons, which are amplified by appropriately sized channels of photomultipliers optically coupled to the scintillator monolith. The photomultiplier output is electronically shaped into a corresponding stream of scintillation pulses (otherwise referred to as scintillation photons) that pass through a comparator to produce a bitstream of the detected scintillation photons, which is sampled into a field programmable gate array (FPGA) acting as a giga-sample transceiver to produce time-to-digital conversions, capable of producing an output data stream of 10's-of-giga-samples per second or more. Appropriate design ensures sparsity of scintillation photon arrival, so that each photon in the bitstream corresponds to a single incident scintillation photon.

To provide a liquid molecule photon treatment apparatus with reduced production cost, a treatment method, and application thereof.SOLUTION: A liquid molecule photon treatment apparatus comprises a tube 10, a molecule disperser 20, a photon emission / discharge device 30, and a refractor 40. The molecule disperser and the refractor are connected to an inner wall of the tube. The refractor faces the photon emission / discharge device. The photon emission / discharge device is positioned outside the tube. The molecule disperser is positioned at one end near an inlet 11 of the tube. The refractor is positioned at the other end near an outlet 13 of the tube. Liquid enters the tube from the inlet, and passes through the molecule disperser to form a liquid molecule group. The liquid molecule group passes through the refractor, and the refractor refracts and reflects photon emission from the photon emission / discharge device a plurality of times and irradiates a liquid molecule group in the tube with photon emission. The liquid molecule group resonates to generate a low molecular weight liquid, and the low molecular weight liquid flows out from the outlet.SELECTED DRAWING: Figure 1

The embodiment of the present application provides a space nuclear reactor shield arranged on one side of a space nuclear reactor body and used for shielding a neutron and photon radiation field from the reactor body. The shield comprises: a beryllium shielding layer used for reflecting and shielding the neutron from the reactor body; a tungsten shielding layer connected to the outer side of the beryllium shielding layer, coaxially arranged with the beryllium shielding layer, and used for shielding the photon; a boron carbide shielding layer connected to the outer side of the beryllium shielding layer, coaxially arranged with the beryllium shielding layer, and used for absorbing the neutron and reducing secondary photons generated by the neutron in the shield; and a lithium hydride shielding layer connected to one end of the beryllium shielding layer and coaxially arranged with the beryllium shielding layer, and used for shielding the neutron from the reactor body. The shield in the embodiment of the present application can reasonably use the efficient neutron shielding material lithium hydride, and can avoid the irradiation swelling problem of lithium hydride.

A downhole tool is provided that includes radiation shielding using a material that is lighter, stronger, less expensive, and / or more commercially available than tungsten radiation shielding. Such a downhole tool may include an electronic radiation generator that emits photons through a source window located on an outer surface of the downhole tool. A detector may detect at least some of the photons through a detector window. Radiation shielding of the downhole tool may attenuate photons that travel from the electronic radiation generator toward the detector without passing through the detector window. The radiation shielding may include a material that has a density less than 10.5 g / cc and an element of atomic number greater than 40.

The invention relates to the technical field of radiation monitoring, in particular to a high-energy photon radiation device and method based on neutron isotopes, and the device comprises a neutron isotope source which is used for releasing neutrons and providing a radiation source; the moderation layer is used for moderating fast neutrons emitted by the neutron isotope source to thermal neutrons below 1eV; the first absorption layer is used for absorbing the moderated thermal neutrons; the second absorption layer is used for shielding pollution photon radiation generated by neutrons along with nuclear reaction; the supporting layer is used for forming an external protective shell; the shutter is used for controlling the on-off of the high-energy photon radiation at the exit port; the target sheet is arranged at the exit port and used for capturing the moderated thermal neutrons and generating high-energy photon radiation; according to the high-energy photon radiation device based on the neutron isotope, the long-life neutron isotope and a conventional construction material are selected, so that the cost of measurement testing is reduced, the problem of short-life consumption is avoided, and pollution radiation introduced by a radiation field is also reduced.

The invention provides a temperature gradient monitoring method and system for bismuth target dissolution reaction, and relates to the technical field of data monitoring, and the method comprises the steps: 1, obtaining axial and radial energy deposition density distribution data and each nuclide activity data in a bismuth target, and converting the nuclide activity data into nuclide quality data of a corresponding position; and step 2, based on the nuclide quality data, calculating photon source item intensity generated by spallation reaction in the bismuth target and a corresponding energy group division result, and inputting the photon source item intensity and the corresponding energy group division result into a photon transport calculation model to carry out photon transport calculation so as to obtain target body external photon radiation dose equivalent rate distribution. By dividing the nested three-dimensional subspace domain, constructing the three-dimensional closed vorticity loop and combining the comprehensive correction factor and the photoacoustic signal temperature effect correction, the radiation interference is eliminated, the three-dimensional non-uniform distribution of the heat source in the bismuth target is accurately represented, and the real and reliable monitoring of the axial and radial temperature gradients in the bismuth target dissolution reaction is realized.

The invention discloses a reference radiation field system of an accelerator R-F radiation substance and a construction method, and the system comprises an accelerator which is used for generating incident protons; the CaF2 target material is fixed in the direction perpendicular to the proton incidence direction, the experiment positioning system is arranged in the direction with the included angle of 0 degree in the proton incidence direction, the starting point of the experiment positioning system is located at the lower end of the CaF2 target material, the total stroke length is 5 m, and the experiment positioning system has the front-back, left-right, up-down and rotary movement functions; the dose rate selection module is used for carrying out R-F radiation substance low-energy pollution photon research in an area which is 0-1m away from the CaF2 target material, and selecting a dose rate value in a range of 1 [mu] Sv / h-1mSv / h in an area which is 1-5m away from the CaF2 target material according to an inverse proportion attenuation relation of a high-energy photon radiation dose rate along with the square of the distance; the first movable lifting positioning table is used for placing a sample and enabling the irradiated center position of the sample and an accelerator beam to be at the same height through lifting adjustment; the CaF2 target material, the experiment positioning system and the first movable lifting positioning table are all arranged in the target chamber.

The present invention relates to additive manufacturing arrangements and methods for additive manufacturing by selective fusion of layers of a three-dimensional product from a powder bed (240) comprising successively formed powder layers. An electron beam emitter (210) is configured to deliver an electron beam (220) towards a top surface (242) of the powder bed (240) and at least one detector (285) is configured to detect electron and / or photon radiation from a structure (291, 292) of a vacuum chamber (280) or inner surface (291, 292) of the vacuum chamber (280). An analysing unit (294) is configured to use the output signal from the at least one detector (285) to analyse the radiation distribution in the output signal to determine a resulting signal indicating a melt status of the melt pool and an electron beam controller (296) is configured to control the energy beam (220) in response to the resulting signal.

The application relates to a fast calculation method and system of discharge photon radiation spectrum and total light intensity in a gas medium, which comprises the following steps: step 1, establishing a discharge process numerical model of a to-be-detected discharge object, and solving discharge parameter distribution at each spatial position in a discharge area; step 2, calculating an electron temperature field at each spatial position based on the discharge parameter distribution; step 3, calculating a local radiation spectrum at each spatial position based on the electron temperature and combining spectral parameters of light-emitting particles at the spatial position, and obtaining an overall radiation spectrum and total light intensity; and step 4, repeating steps 2-3 to obtain full-time-space evolution results of the overall radiation spectrum and the total light intensity in the discharge process, and completing the calculation process. Compared with the prior art, the application has the advantages of efficient calculation of full-time-space spectrum evolution in a complex discharge process.

The invention relates to the technical field of radiation monitoring, in particular to a pulse photon radiation dose rate relative measurement device and measurement method. The system comprises a plastic scintillator probe, a signal multiplication SiPM module and a precision source meter. The invention designs a measurement device design of a pulse photon radiation field and a relative measurement method of the dose rate, a reliable effective measurement means of pulse radiation is established, and the established relative measurement method also links the dose rate result of the pulse radiation with a domestic standard value under the condition of lacking a national standard.