27 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.

This invention discloses a device for generating microwave two-photon radiation and a method for detecting weak magnetic fields. To further enhance the application of microwave photons in quantum information processes, we propose a method for realizing two-photon radiation. This method differs from previous two-level systems that interact with the environment, absorbing or emitting only one photon. We construct a three-level system using a Josephson structure, placing the single-photon process in a highly detuned state while the two-photon process resonates. Therefore, both photons are absorbed or released simultaneously, significantly improving radiation efficiency. Combined with the inherent single-photon dissipation, this method will be applied in chip-based quantum information processes and high-precision quantum precision measurements. The minimum detection accuracy of weak magnetic fields can reach 10 Gauss, an order of magnitude improvement over measurements using single-photon radiation mechanisms.

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 invention provides a preparation method and application of a boron target for generating a high-energy photon radiation field, and the preparation method comprises the following steps: mixing filtered boron elementary substance with mineral oil, and stirring until the mixture is uniformly mixed; standing for a certain time until the boron elementary substance is uniformly suspended, dipping the boron elementary substance on the upper layer of the mineral oil by using a brush, and uniformly coating on the surface of the substrate; the substrate is placed in a drying box to be baked under flowing air till the mineral oil is completely evaporated, and the boron target coated with the boron elementary substance layer is obtained. The preparation method of the boron target is easy and convenient to operate, professional equipment is not needed, and the prepared boron target is durable and not prone to damage. A proton beam with incident energy greater than or equal to 240keV and beam intensity greater than or equal to 15mu A is used for bombarding the boron target, and a stable high-energy photon radiation field with a dose rate greater than 100mu Sv / h can be generated.

Methods for detection using optical emission spectroscopy in which an optical signal is delivered from the process chamber to an optical emission spectrometer (OES). The OES identifies emission peaks of photons, which corresponds to the optical intensity of radiation from the photons, to determine the concentrations of each of the precursor gases and reaction products. The OES sends input signals of the data results to a controller. The controller can adjust process variables within the process chamber in real time during deposition based on the comparison. In other embodiments, the controller can automatically trigger a process chamber clean based on a comparison of input signals of process chamber residues received before the deposition process and input signals of process chamber residues received after the deposition process.

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.

The invention relates to a reference radiation field based on high-energy photons of an accelerator and an application method of the reference radiation field. An accelerator pipeline area is a pipeline of a straight tubular structure and is used for emitting incident particle beams required by a nuclear reaction of the high-energy photons; the target chamber vacuum operation area is connected with the accelerator pipeline area and is a pipeline of a T-shaped structure, a transverse pipeline of the T-shaped structure is connected with the accelerator pipeline area and is parallel to the accelerator pipeline area, and a longitudinal pipeline of the T-shaped structure is connected with a vacuum extraction device; the target chamber nuclear reaction area is connected with the target chamber vacuum operation area, is connected to one end, far away from the accelerator pipeline area, of the transverse pipeline of the T-shaped structure, a nuclear reaction target material is arranged in the target chamber nuclear reaction area, and an incident particle beam penetrates through the target chamber vacuum operation area to react with the nuclear reaction target material to form high-energy photons. According to the invention, the independent high-energy photon radiation field is arranged, and the technical effect of meeting the verification requirement of a domestic nuclear power plant on the high-energy photon dose rate can be achieved.

The invention relates to a pollution radiation test method for a high-energy photon reference radiation field, and the method comprises the steps: constructing a detector physical model of high-energy photons based on a Monte Carlo method; obtaining a measurement spectrum at a high-energy photon radiation substance calibration point through a detector physical model; calculating the measurement spectrum through a G function to obtain a high-energy photon dose rate value; simulating an HpGe detector detection efficiency curve within the energy range of 8MeV in the detector physical model to obtain a low-energy photon dose rate value; based on Co-60 isotope energy calibration, determining an electron dose rate value through an extrapolation ionization chamber; neutron isotopes are set, and a neutron dose rate value is obtained based on a long counter; and determining a dose ratio based on the dose rate value. The technical effect of obtaining the dose ratio of the high-energy photon dose rate value, the low-energy photon dose rate value, the electron dose rate value and the neutron dose rate value is achieved.

A method of designing an attenuator for shaping a radiation field includes defining a radiation field of a radiation source, defining an attenuator geometry of an attenuator configured to receive the radiation field, and optimizing the attenuator geometry based on an objective function. The objective function is based on a radiation transport of the radiation field through the attenuator geometry. The radiation transport is based on a non-stochastic process. Advantageously the method can determine an optimal, arbitrary attenuator geometry for any radiation source (e.g., any complex emission profile) and / or objective functions (e.g., flux, fluence, dose, ionization, KERMA, exposure, etc.), determine an optimal configuration of a dynamic attenuator, utilize a non-stochastic (e.g., deterministic) radiation transport model, avoid iterative Monte Carlo calculations, increase computational efficiency of the optimization process, and thus reduce required parameter constraints on the attenuator geometry.

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.

The present invention provides a three-dimensional chlorophyll-a concentration profile detection method and system, which relates to the field of remote sensing data processing technology. The method comprises obtaining satellite image data and water photon data of a regional water body, dividing the photons of the regional water body into surface photons and underwater photons, performing ocean wave fitting reconstruction, and constructing a water body photon refraction correction model. The underwater photon coordinates are corrected to obtain refraction-corrected coordinates. Using the underwater profile detection model, nonlinear correction is performed on the photon radiation transmission to obtain a volume scattering coefficient. The refraction-corrected coordinates and the volume scattering coefficient are combined to establish an underwater concentration model. The water surface chlorophyll-a concentration is modeled using satellite image bands, and the underwater concentration model is calibrated to obtain a final underwater concentration model. Finally, the surface and underwater chlorophyll-a concentration models are combined to obtain the three-dimensional chlorophyll-a concentration of the regional water body. The present invention not only improves the accuracy and reliability of detection, but also can reflect the vertical and horizontal distribution of chlorophyll-a in the water body.

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.

The present invention provides the use of the FKBP5 gene as a molecular marker for photon radiation resistance in nasopharyngeal carcinoma, belonging to the field of biomedicine. Through protein profiling, gene sequencing, and clinical sample gene chip testing, the present invention analyzes and screens genes differentially expressed in nasopharyngeal carcinoma radiation-resistant and radiation-sensitive cell lines. The findings indicate that FKBP5 expression is significantly higher in radiation-resistant nasopharyngeal carcinoma cells than in radiation-sensitive nasopharyngeal carcinoma cells. Inhibiting FKBP5 expression significantly enhances nasopharyngeal carcinoma radiosensitivity and cell lethality.

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.

Provided herein is technology relating to treating cancer and particularly, but not exclusively, to systems and methods for treating a cancer patient in an upright position with photon radiation. The technology provides an integrated photon treatment system comprising a medical imaging system, a patient rotation system, and a photon beam delivery system.

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 utility model relates to a thermoluminescent personal dose box which comprises an outer shell and an inner shell. The whole shell is cylindrical, and the two ends of the shell are hemispherical. The shell comprises an upper shell and a lower shell which are hermetically connected with each other; the inner shell comprises a dosage piece placing plate and a positioning plate, and a plurality of dosage piece placing grooves are formed in the dosage piece placing plate; a slot is formed in the positioning plate, and the dosage piece placing plate is inserted into the slot; the positioning plate is mounted in the shell; the whole shell is cylindrical, has an axisymmetric structure, and can meet the requirement of photon radiation for nondirectivity; the shell comprises an upper shell and a lower shell which are matched through a sealing ring to realize sealed connection, so that water and dust can be prevented from permeating; the dose box is made of a non-transparent material and has good light shielding performance.

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.