220 results about "Electron radiation" patented technology

A medical accelerator system is provided for simultaneous radiation therapy to all treatment fields. It provides the single dose effect of radiation on cell survival. It eliminates the inter-field interrupted, subfractionated fractionated radiation therapy. Single or four beams S-band, C-band or X-band accelerators are connected to treatment heads through connecting beam lines. It is placed in a radiation shielding vault which minimizes the leakage and scattered radiation and the size and weight of the treatment head. In one version, treatment heads are arranged circularly and connected with the beam line. In another version, a pair of treatment heads is mounted to each ends of narrow gantries and multiple such treatment heads mounted gantries are assembled together. Electron beam is steered to all the treatment heads simultaneously to treat all the fields simultaneously. Radiating beam's intensity in a treatment field is modulated with combined divergent and pencil beam, selective beam's energy, dose rate and weight and not with MLC and similar devices. Since all the treatment fields are treated simultaneously the dose rate at the tumor site is the sum of each of the converging beam's dose rate at depth. It represents the biological dose rate. The dose rate at d-max for a given field is the individual machine dose rate. Its treatment options includes divergent or pencil beam modes. It enables to treat a tumor with lesser radiation toxicities to normal tissue and higher tumor cure and control.

A system, method, apparatus, and means for delivering treatment fields includes identifying a sequence group. A type of radiation to be applied in a first field of the sequence group is identified. The type of radiation is selected from among primary photon radiation and primary electron radiation. A radiation therapy treatment device is configured, based at least in part on the type of radiation. The first field is then delivered.

A flat-type display comprising a first panel having electron-emitting portions; a second panel having an electron irradiation surface; and an electron-emitting-portion driving circuit for driving the electron-emitting portions, wherein an electron-emitting-portion cutoff circuit is provided between the electron-emitting portions and the electron-emitting-portion driving circuit for preventing a discharge between the electron-emitting portions and the electron irradiation surface.

A system for obtaining improved resolution in room temperature semiconductor radiation detectors such as CdZnTe and Hgl2, which exhibit significant hole-trapping. A electrical reference plane is established about the perimeter of a semiconductor crystal and disposed intermediately between two oppositely biased end electrodes. The intermediate reference plane comprises a narrow strip of wire in electrical contact with the surface of the crystal, biased at a potential between the end electrode potentials and serving as an auxiliary electrical reference for a chosen electrode-typically the collector electrode for the more mobile charge carrier. This arrangement eliminates the interfering effects of the less mobile carriers as these are gathered by their electrode collector.

The invention relates to an IXPE electronic radiation crosslinked polyethylene conductive foam and a preparation method thereof. The IXPE electronic radiation crosslinked polyethylene conductive foam mainly contains the mother batch: low density polyethylene; accessories: ethylene-vinyl acetate copolymer, azodicarbonamide blowing agent, polyethylene wax lubrication additive, titanate ester coupling agent and conductive carbon black which are mixed for processing, extruded for molding, radiated for crosslinking, heated for foaming, and treated by secondary processing, etc, to produce the IXPE electronic radiation crosslinked polyethylene conductive foam. The crosslinking of the product of the invention can be easily controlled, the foaming process is stable, the foam pores are fine and even, the quality of the surface is high without unpleasant odor, the foam pores are obstructed, the production can be carried out continually, the electrical conductivity is stable, the product is lightweight, non-toxic, extremely less absorbent; the thermal conductivity is slow, aging resistant, chemical corrosion resistant, pulverization resistant, and a plurality of porous foam materials can be easily achieved; in addition, the product has good properties to be treated by the secondary processing procedures, such as bonding, machining, hot forming, etc.

The invention relates to a pulse electronic accelerator nano-pico ampere electron beam flow measuring system, relating to an electronic accelerator pulse electron beam flow measuring system, in particular to the nano-pico (10-10A / cm2) micro beam flow measurement of millisecond pulse, belonging to the electron radiation environment ground simulation and test field. The pulse electronic accelerator nano-pico ampere electron beam flow measuring system is composed of a novel inclined-bottom faraday cup, three coaxial cables and a nano-pico level current amplifier. The measurement result can be obtained by oscilloscope or data acquisition card. The inclined-bottom faraday cup electron collection system resolves the collection efficiency problem of high energy electrons (MeV), to improve collection efficiency. The adopted three coaxial cables can reduce the interference of electromagnetic field. The nano-pico ampere level current amplifier resolves the stable current linear amplification problem under electron radiation, and converts weak current signals to voltage signals, thus being convenient for data acquisition of oscilloscope or data acquisition card. The invention resolves the measurement problem of nano-pico ampere pulse electron beam flow, to confirm the accuracy, real-time property and easy use of measurement.

The unvention discloses an imaging detector. A hybrid imaging detector is for detecting ionizing radiation such as X-rays or electron radiation. The detector has a sensor (10) on a read-out chip (20).The sensor (10) includes a plurality of sensor material layers (12, 14) of different materials stacked on top of one another, having differing radiation absorbing properties. The materials may be Siand SiGe, Si and Ge, or Si and amorphous Se, for example. The read-out chip is a photon-counting read-out chip that records a single count when a pulse above a threshold is detected.

The invention provides a preparation method of flame retarding and anti-droplet fiber or textile, and the flame retarding and anti-droplet fiber or textile prepared by utilizing the preparation method. In the preparation method of the invention, fiber or textile is padded and grafted with a monomer solution, and subsequently grafted by electron radiation; then, the fiber or the textile is padded with a cross linker solution and treated with baking so as to cause a fibre-forming polymer to form three-dimensional net type structure. Both of the monomer solution and the cross linker solution can contain flame-retarding elements, and at least one of the two contains the flame-retarding elements so as to lead the synthetic fibers or textiles to realize the dual effects of droplet resistance and flame-retarding. The method of the invention is characterized by strong adaptability to processed objects and good flame-retarding and anti-droplet performance, and the industrialization of the method of the invention is easy to be fulfilled.

The invention relates to polyolefin pearl foam and a preparation method thereof. The method comprises the following steps: (1) preparing foaming master batch; (2) preparing flame retardant master batch; (3) preparing calcium carbonate filler master batch; (4) adding raw materials into a high-speed mixer to prepare an ingredient 1; (5) adding raw materials into the high-speed mixer to prepare an ingredient 2; (6) performing double-layer composite extruding: adding the ingredient 1 and the ingredient 2 into a hopper of a double-layer composite sheet extruder to extrude into double-layer composite sheets; (7) performing radiation crosslinking of the composite sheets; (8) foaming the composite sheets; (9) cutting the composite sheets to obtain a finished product. The polyolefin pearl foam prepared by using the method has the advantages of good luminescence effect, easily available raw materials and low preparation cost.

A lithography method for a pattern to be etched on a support, notably to a method using electron radiation with direct writing on the support. Hitherto, the methods for correcting the proximity effects for dense network geometries (line spacings of 10 to 30 nm) have been reflected in a significant increase in the radiated doses and therefore in the exposure time. According to the invention, the patterns to be etched are modified as a function of the energy latitude of the process, which allows a reduction of the radiated doses.

The disclosure relates to a system for monitoring and control in the sterilization of an object (1) which, for the purpose of sterilization, is electron irradiated from an electron radiation source (2) past which the object is led or conveyed. The system includes a detector (11), a converter (13), a generator (18), a process control unit (19), as well as an ejector mechanism (26) which is disposed to be activated for ejecting the sterilized object (1) on receipt of a negative comparison signal from the process control unit (19).

A sterilization system for PET containers and bottles including at least one electron flow generator 1, a scan gun 2 and at least one target 4 preferably made of heavy metal, so that when a part of the electron radiation hits said target a reflected X ray radiation is generated, which contributes to the sterilization of the containers. A certain amount of liquid or gaseous oxygen which upon collision with the electron radiation is converted to ozone is also exposed to the radiation, thus further contributing to the sterilization.

An instrument for checking quality of therapeutic x-ray and electron radiation provides modes optimized for both electrons and for photons obtained by physically flipping the unit to interpose the necessary build-up material between the radiation beam and contained detectors. The invention provides an improved method of constructing ionization detectors for improved energy discrimination using such detectors and wire-free operation.

The present invention relates to a process for grafting an unsaturated monomer onto a fluoropolymer, having the steps of: a) melt blending the fluoropolymer with the unsaturated monomer; b) forming the blend obtained in a) into films, sheets, granules or powder; c) exposing the products from step b), in the absence of air, to photon (y) or electron (β) irradiation with a dose of between 1 and 15 Mrad; and d) optionally treating the product obtained at c) in order to remove all or part of the unsaturated monomer that has not been grafted onto the fluoropolymer. Structures made with these materials are barriers to many fluids and in particular to petrol and to air-conditioning fluids and may be formed into bottles, tanks, containers, pipes, hoses and vessels of all sorts. They may also be converted into films with which packaging is made.

Apparatus for performing electron radiation therapy on a breast cancer patient preferably includes an intraoperative electron radiation therapy machine, an intraoperative electron radiation therapy collimator tube connected to the intraoperative electron radiation therapy machine, and a plurality of filters made of a material having substantially the same density as human breast tissue for placement between the machine and the patient to change the energy of a monoenergetic beam after the beam has left the machine, allowing a filter to be chosen to reduce the energy traveling through the tube to a desired amount of energy to treat the patient. A method of controlling the amount of energy to reach a breast cancer patient undergoing electron radiation therapy includes selecting a filter made of a material having substantially the same density as human tissue and placing the filter between an intraoperative electron radiation therapy machine and a breast cancer patient to change the energy of a monoenergetic beam after it has left the machine, the filter being chosen to reduce the energy traveling from the machine to a desired amount of energy to treat the patient.

The invention discloses a method and apparatus for forming the doped cryo-biology specimen of electron microscope. The invention applies rapid cryogenic freezing to the biology specimen, and dopes certain concentration of protons and electrons into the cryo-biology specimen for conducting the observation using electron microscope. The invention reduces the radiation damage of cryogenic biology specimen and amorphous ice caused by the electron radiation, and observes the prototype of biomolecules and biomaterials clearly.

Disclosed is a gas-generating, pressure-sensitive adhesive composition comprising a pressure-sensitive adhesive (A) transmitting therethrough a radiation selected from the group consisting of an electromagnetic radiation, an electron radiation and an alpha radiation, and a gas generator compound (B) which generates a gas upon irradiation thereof with the radiation, wherein the gas generator compound (B) is operably combined with the pressure-sensitive adhesive (A), so that, in operation, when the gas-generating, pressure-sensitive adhesive composition which is adhered to an adherend is irradiated with the radiation, the gas generator compound (B) generates a gas and the gas effuses at an interface between the gas-generating, pressure-sensitive adhesive composition and the adherend to thereby facilitate release of the adherend from the gas-generating, pressure-sensitive adhesive composition.

The invention discloses a tire rubber sheet electron radiation crosslinking pretreatment device and a tire rubber sheet electron radiation crosslinking pretreatment method. A conveyor belt used for realizing an arc-shaped conveying track is arranged in a shielding room; based on the ray absorption by the interior wall of the shielding room, the ratio of attenuation generated by multiple times of refraction is increased by increasing the reflection times of rays, and thus, the rays can be absorbed to a maximum degree and the ray leakage can be reduced so as not to pollute the environment and hurt the body the operators. The device mainly comprises a radiation room, the shielding room and the conveyor belt for conveying rubber sheets, wherein an electron accelerator is arranged in the radiation room and above the conveyor belt, and the conveyor belt runs through the radiation room and the shielding room. Ray absorbing plates are adhered on all of the inner walls of the radiation room and the shielding room. The conveyor belt comprises a horizontal conveying part arranged in the radiation room and below the electron accelerator and an oblique conveying part arranged in the shielding room. The oblique conveying part has at least one group of left and right symmetric and vertically bent continuous conveying section.

The present invention is electronic beam radiopolymerization process of synthesizing temperature sensitive hydrogel directly, and belongs to the field of temperature sensitive hydrogel preparing technology. Material monomer, cross-linking agent and additive in the weight ratio of 75-98.5 to 0.1-1 to 1-10 are dissolved in deionized water and polymerized through electron radiation to form cross-linked polymer. The cross-linked polymer is then extracted in a Soxhlet extractor with boiled deionized water for 24 hr and dried in a vacuum oven to obtain the temperature sensitive hydrogel. The temperature sensitive hydrogel may be used in medicine controlled releasing system, memory element switch, artificial muscle, chemical separation and other field. The present invention has the features of simple technological process, high polymerization efficiency, less pollution, low cost, normal temperature operation, etc.

The invention discloses a manufacturing method of an acrylic fiber and bamboo fiber blended water-repellent shell fabric. The selected warp and weft materials comprise the following components in parts by mass: 40-90 parts of acrylic fibers, 20-45 parts of natural fibers, 6-12 parts of synthetic fibers, 8-15 parts of bamboo fibers, 60-95 parts of cotton fibers and 8-18 parts of super fine denier polyesters. According to the manufacturing method, water repellent finish is carried out between sizing operation and air injection by the following steps: padding a shell fabric in a water repellent finish liquid; taking out the shell fabric; and then carrying out electron radiation and drying treatment, wherein the water repellent finish liquid comprises 2-8% by mass of a water repellent; the drying treatment comprises first drying treatment and second drying treatment. According tothe manufacturing method of the acrylic fiber and bamboo fiber blended water-repellent shell fabric designed by the invention, the cohesive force between the fibers of the acrylic fiber and bamboo fiber blended water-repellent shell fabric can be enhanced, and the acrylic fiber and bamboo fiber blended water-repellent shell fabric has a good water-repellent antibacterial performance while having the advantages of high elasticity, high strength and heat and light resistance, and the washability and the softness of textile are improved.

An electron radiation apparatus is provided. The electron radiation apparatus includes a beat-wave laser system generating a laser beat wave, an electron emitter emitting a density-modulated electron current induced by the laser beat wave, an electron accelerator accelerating the density-modulated electron current and generating a periodically bunched electron beam, and a radiation device receiving the periodically bunched electron beam and generating an electron radiation with a radiation frequency matched to one of the harmonics of the bunching frequency of the periodically bunched electron beam.

A flexible packaging material, especially a seal and / or packing material which can be sterilized, having a single film or a film composite with a single or double-print motif. The packing material contains a partially or fully transparent, heat-resistant cover layer applied to at least the print motif by an electro-photographic method. The cover layers are produced from an ultraviolet radiation or electron radiation hardening toner.

The invention discloses a preparation method of radiation-crosslinked polypropylene. According to the invention, polypropylene powder is added to a solution containing a croddlinking auxiliary agent; the mixture is processed through bake-drying, solvent removing and heat treatment; an antioxidant is added to the mixture, and the mixture is milled by using a double-roller mixing mill; the mixture is molded by extrusion or mold-pressing; and the molded polypropylene is irradiated. With the method provided by the invention, polypropylene and the croddlinking auxiliary agent can be sufficiently and uniformly mixed beforehand; the milling time can be shortened; the crosslinking efficiency can be improved; and the heat resistance and the melt strength can both be improved. In the radiation-crosslinking process, no chemical crosslinking agent is used, such that the method is environment-friendly. The crosslinking degree is uniform and controllable. The method is also advantaged in low energyconsumption and high yield. With electron radiation, environmental-aging resisting and temperature resisting performances of the polypropylene foam are substantially improved.

The invention relates to anti-radiation fabric, in particular to the anti-radiation fabric mixed with metal fibers and a spinning process of the anti-radiation fabric. The anti-radiation fabric is prepared by the following raw materials in percentage by weight: 3 to 5 percent of silver fiber, 3 to 5 percent of copper fiber, 88 to 93 percent of cotton fiber and 1 to 2 percent of other chemical fibers. The spinning process of the anti-radiation fabric comprises the steps of pre-opening, blowing, cotton carding, drawing, roving, spinning and spooling. Compared with the prior art, the invention has the advantages that a copper fiber material is added, a finished product can effectively resist electron radiation, and the anti-radiation fabric is comfortably worn.

A packaging for products, that is to be decontaminated by radiation, having at least one tub having an opening and a peripheral zone defined about the opening, one cover sheet made of a selectively impervious material and fixed to the peripheral zone of the tub so as to seal said opening imperviously, and one screen against electron radiation dimensioned to substantially cover the products contained in the packaging. The screen is placed on top of the cover sheet, outside of the tub.

The present invention relates to an X-ray apparatus comprising an electron radiation source which generates an electron to an anode, a shaft which rotatably supports the anode, a stator which generates a force to rotate a rotor shaft, an enclosure which maintains at least the anode, electron radiation source and rotor shaft in vacuum, and a housing which contains a cooling medium around the enclosure. The X-ray apparatus is characterized in that an electric wire material to supply power to the electron radiation source and stator, or a connector used for connection with the electric wire material is molded by a material having an electrical insulating property.

The invention provides a preparation method of an aluminum alloy surface conductive thermal control coating with low solar absorptivity and high emissivity, and relates to the preparation method of the aluminum alloy surface conductive thermal control coating. The preparation method aims at solving the technical problems that a conductive thermal control coating integrated film meeting the requirements of space ultraviolet radiation and electron radiation cannot be prepared with the existing aluminum alloy surface treatment technology. The method includes the steps of 1, surface pre-treatmentof an aluminum alloy part; 2, preparation of electrolyte; 3, pulse micro-arc oxidation; and 4, magnetron sputtering. The thickness of the prepared aluminum alloy surface conductive thermal control coating with low solar absorptivity and high emissivity is 20-100 micrometers, and the roughness of the prepared aluminum alloy surface conductive thermal control coating with low solar absorptivity andhigh emissivity is 2.0-12.0 micrometers; and the solar absorptivity is 0.35-0.42, the emissivity is 0.88-0.92, the value of alpha s / epsilon is about 0.4, the surface resistivity is 1*10<-5> Ohm.cm, the dual requirements of thermal control and static resistance of spacecrafts are met, and the conductive thermal control coating can be used for spacecraft structures.

Disclosed herein are systems and methods for in-situ measurement of impurities on metal slugs utilized in electron-beam metal evaporation / deposition systems, and for increasing the production yield of a semiconductor manufacturing processes utilizing electron-beam metal evaporation / deposition systems. A voltage and / or a current level on an electrode disposed in a deposition chamber of an electron-beam metal evaporation / deposition system is monitored and used to measure contamination of the metal slug. Should the voltage or current reach a certain level, to the deposition is completed and the system is inspected for contamination.