21results about "Glass dosimeters" patented technology

The present application relates to the technical field of radiation dose, and specifically discloses a preparation method and application of silver-doped silicon phosphate glass sheet, aiming at solving the problems of easy cracking, easy hydrolysis of glass and unstable radiation photoluminescence performance in the prior art, the method comprising: mixing component raw materials, degassing, high-temperature melting, pouring the molten glass liquid into a preheated graphite crucible for shaping, and then performing constant-temperature annealing, polishing, polishing and cutting to obtain an X-ray radiation dosimeter. The present application effectively adjusts the material microstructure and the formation process of the radiation photoluminescence center by adding precisely regulated phosphate glass components and optimizing the annealing process, and prepares an X-ray radiation dosimeter with stable structure, good thermal stability and low hydrolysis resistance. The medium performs excellently in radiation photoluminescence intensity, signal retention capacity, response stability and chemical stability, and can be widely applied in the fields of X-ray imaging, medical diagnosis, non-destructive detection and precise structure analysis.

The invention provides radiation sensitive films, radiation dosage indicators comprising these films, processes for preparing these films, and methods of use of these films in several industrial and domestic applications that require exposure to radiation for certain benefits. The radiation sensitive films comprise a radiation sensitive composition typically in the form of a film which is overlaid by an uncolored and optically transparent layer for increasing the radiation sensitivity of the films.

The invention relates to an ionising radiation detector, the detector comprising a scintillator, a monomer and a catalyst, wherein: - the scintillator emits non-ionising radiation after absorbing ionising radiation, - the catalyst catalyses the polymerisation of the monomer after absorbing the non-ionising radiation emitted by the scintillator, - the polymer resulting from the polymerisation of the monomer has a different colour from the monomer.

The invention relates to an ionizing radiation detector, the detector comprising a scintillator, a monomer and a catalyst in which:- the scintillator emits non-ionizing radiation following absorption of ionizing radiation,- the catalyst catalyzes the polymerization of the monomer following absorption of the non-ionizing radiation emitted by the scintillator, - the polymer resulting from the polymerization of the monomer has a different color from the monomer. Figure for abstract: Figure 1

The invention relates to a dosimeter (100) comprising a light source (1) capable of generating a light beam (10), an optical coupler-splitter (2), a radiosensitive optical fiber (3), a first photodetector (5) arranged to record a power measurement (21) of the light beam transmitted through the radiosensitive optical fiber (3), a reference optical arm (4), a second photodetector (6) arranged to record a reference power measurement (22) of the light beam transmitted through the reference optical arm (4), and an electronic system (20) configured to extract a differential measurement of radiation-induced attenuation in the radiosensitive optical fiber (3) with respect to the reference optical arm (4). According to the invention, the light beam (10) is unpolarized or depolarized, or, respectively, the light beam (10) is polarized and the radiosensitive optical fiber (3) is a polarization-maintaining fiber.

The invention relates to an ionizing radiation detector, the detector comprising a scintillator, a monomer, and a catalyst in which: - the scintillator emits non-ionizing radiation following the absorption of ionizing radiation, - the catalyst catalyzes the polymerization of the monomer following the absorption of the non-ionizing radiation emitted by the scintillator, - the polymer resulting from the polymerization of the monomer has a different color from the monomer. Figure for the abstract: Figure 1

The invention relates to an ionizing radiation detector, the detector comprising:- a monomer in a crystalline form,- and a catalyst incorporated within the crystalline form of the monomer, the catalyst catalyzing the polymerization of the monomer following absorption of ionizing radiation, the polymer resulting from the polymerization of the monomer having a different color from the monomer. Figure for abstract: Figure 1

The invention relates to an ionising radiation detector, the detector comprising: - a monomer in a crystalline form, - and a catalyst incorporated within the crystalline form of the monomer, the catalyst being capable of absorbing ionising radiation and catalysing the polymerisation of the monomer after absorbing the ionising radiation, the polymer resulting from the polymerisation of the monomer having a different colour from the monomer.

Systems and methods for relative optimized linearization (ROL) for radiochromic film (RCF) dosimetry may eliminate the need for dose-response curve measurements while incorporating non-uniformity corrections. The ROL method may include, for each of multiple color channels, determining linearization parameters that minimize a cost function that evaluates an error between expected and calculated doses. The ROL method may use the linearization parameters to generate a variation map including dose-independent variation values and use the variation map to determine a corrected net optical density of the RCF. The ROL method may use the linearization parameters and the corrected net optical density to produce a dose image including corrected doses.

This present disclosure provides a multilayer dosimetry system, comprising: (a) a mounting layer, wherein the mounting layer is an optically clear polymer film having two sides coated with an optically clear first adhesive; (b) at least two active layers, wherein the mounting layer is sandwiched between active layers by affixing to the optically clear first adhesive; and (c) (i) an optically clear top base layer affixed to upper side of the sandwiched structure of (b), and (ii) a bottom base layer affixed to bottom side of the sandwiched structure of (b). The present disclosure also provides a point dose measurement device comprising a multilayer dosimetry system. The present disclosure further provides an integrated system to measure point dose radiation and a process for measuring point dose radiation.

This present disclosure provides a radiation dosage indicator comprising: a first ply comprising at least one radiochromic film having a substrate covering with an active layer; optionally, a second ply having at least one visible indicium is configured to underlay the first ply; optionally, a third ply overlying the first ply comprising at least a one viewing zone and the visible indicium; and a fourth ply having a colored lamination layer overlying the active layer of the radiochromic film, optionally a fifth ply having a complementary colored lamination layer overlying the forth colored ply, wherein the active layer is configured to change opacity in response to exposure to a certain radiation dosage exceeding an independently predetermined threshold of each radiochromic film; and wherein the visible indicium of the second ply is configured to be exposed to view through the viewing zone and providing a visual indication as to whether the indicator has been exposed to a radiation dosage exceeding the predetermined threshold. The present disclosure also provides a semi quantitative radiation dosage indicator. The present disclosure also provides a radiation dosage indicator used in the field of insect sterilization, phytosanitary, food sterilization, medical device sterilization, and cannabis irradiation.

The invention discloses a radiation dose detection system and method based on glass browning, and mainly solves the technical problems of high detection cost, complex structure and the like of an existing detector. The detection system comprises a light source, glass, an image sensor and a signal processing module, the glass is browned in an irradiation environment; the optical axis of the light source is vertical to the glass surface and passes through the center of the glass; the image sensor is mounted on one side of the glass away from the light source and used for acquiring light source images through the glass; the signal processing module is connected with the image sensor and used for receiving the light source image transmitted by the image sensor and calculating and outputting parameter information of the irradiation environment, and the detection system is simple in overall structure and low in detection cost. Meanwhile, the invention further discloses a detection method based on the detection system, and the method is convenient to operate and high in detection precision and accuracy.

To provide a dosimetry device for quantifying the dosage of radiation emitted from a radiation source.SOLUTION: A dosimetry device for quantifying the dosage of radiation provided herein comprises (i) a radiation dose indicator, (ii) optical means for capturing color changes, and (iii) software means for comparing optical density of the dose indicator to a predetermined calibration curve, and is configured to quantify the dosage of radiation emitted from the radiation source.SELECTED DRAWING: Figure 1

Provided herein is a dosimetry device for quantifying the dosage of radiation emitted from a radiation source, the device comprising: (i) a radiation dose indicator; (ii) an optical means to capture the color change; and (iii) a software means to compare the optical density of the dose indicator as compared to a predetermined calibration curve. Also provided herein is a method of quantifying the dosage of radiation emitted from the radiation source. Further provided herein is use of said dosimetry device in various medical, food and industrial applications.

This present disclosure provides a multilayer dosimetry system, comprising: (a) a mounting layer, wherein the mounting layer is an optically clear polymer film having two sides coated with an optically clear first adhesive; (b) at least two active layers, wherein the mounting layer is sandwiched between active layers by affixing to the optically clear first adhesive; and (c) (i) an optically clear top base layer affixed to upper side of the sandwiched structure of (b), and (ii) a bottom base layer affixed to bottom side of the sandwiched structure of (b). The present disclosure also provides a point dose measurement device comprising a multilayer dosimetry system. The present disclosure further provides an integrated system to measure point dose radiation and a process for measuring point dose radiation.

The invention relates to a luminescent phosphate fluorescent glass ceramic capable of rapidly responding to radiation dose detection and a preparation method and application thereof.The luminescent phosphate fluorescent glass ceramic is prepared from Na2CO3, BaCO3, NH4H2PO4 and H3BO3 through mixed grinding, calcination, melting quenching, grinding, compression molding, heat treatment and cooling, Dy < 3 + > is doped in a glass ceramic matrix in the form of a compound, and the Dy < 3 + > ion doped NaBaPO4 glass ceramic is obtained. Cold white light is emitted under the excitation of a specific excitation wavelength, through experiments and calculation, the sample contains three shallow trap energy levels with different depths, the characteristic endows the sample with remarkable rapid response performance, and charge carriers can be rapidly released in the optical excitation reading process, so that shorter signal reading time and rapid bleaching capability are realized, and the sensitivity of the sample is improved. And good linear dose response to high-energy rays in a range of 0.1-200 Gy is realized. The fluorescent material has good white light luminescence characteristic, rapid response characteristic, wide radiation dose response performance and good reusability, and can be applied to the field of luminescence and radiation dose detection as a novel fluorescent material.

This relates to a dosimeter including a light source capable of generating a light beam, an optical coupler-splitter, a radio-sensitive optical fiber, a first photodetector arranged to record a power measurement of the light beam transmitted through the radio-sensitive optical fiber, a reference optical arm, a second photodetector arranged to record a reference power measurement of the light beam transmitted through the reference optical arm, and an electronic system configured to extract a differential radiation induced attenuation measurement in the radio-sensitive optical fiber with respect to the reference optical arm. The light beam is non-polarized or depolarized, or, respectively, the light beam is polarized and the radio-sensitive optical fiber is a polarization-maintaining fiber.

The invention relates to a method and a device for determining a radiation dose which is undergone by an aqueous liquid by electron radiation. In the method, in the case of an aqueous liquid, which contains or consists of an organic dye and water, a degree of absorption or fluorescence of the liquid is measured before and after direct irradiation with electron radiation with an energy of <600 keV for a predetermined period of time, and from this, a difference is ascertained. A radiation dose, which the liquid has undergone by the electron radiation during the predetermined period of time, is subsequently determined from the difference. The method and the device make it possible to determine a radiation dose which is undergone by an aqueous liquid by electron radiation with an energy of <600 keV.

This invention relates to the field of high-sensitivity radiation detection technology, specifically disclosing a method for preparing silver-doped boron phosphate glass sheets and their applications. The invention involves mixing, degassing, and melting the component raw material powders, pouring the molten glass into a preheated graphite mold, and then annealing, grinding, polishing, and cutting to obtain silver-doped boron phosphate glass sheets. By precisely controlling the P:B ratio and annealing process, this invention introduces B-O-P bridging and B-O-B structures at the glass network structure level, significantly improving the structural and environmental stability of the glass and overcoming the technical defects of existing silver-doped phosphate glasses, such as easy hydrolysis and fragility. The prepared glass sheets exhibit excellent photoluminescence properties, with a good linear relationship between luminescence intensity and radiation dose in the 0-50 Gy dose range, and possess neutron detection potential. They can be applied in fields such as radiation monitoring, high spatial resolution X-ray imaging, non-destructive testing, biomedical imaging, and encryption and anti-counterfeiting technologies.