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- Electron_beam_processing abstract "Electron beam processing or electron irradiation is a process which involves using electrons, usually of high energy, to treat an object for a variety of purposes. This may take place under elevated temperatures and nitrogen atmosphere. Possible uses for electron irradiation include sterilization and to cross-link polymers.Electron energies typically varies from the keV to MeV range, depending on the depth of penetration required. The irradiation dose is usually measured in Gray but also in Mrads. Where 1 Gy is equivalent to 100 rad.The basic components of a typical electron beam processing device are illustrated in the figure. An electron gun (consisting of a cathode, grid, and anode) is used to generate and accelerate the primary beam. A magnetic optical (focusing and deflection) system is used for controlling the way in which the electron beam impinges on the material being processed (the "workpiece"). In operation, the gun cathode is the source of thermally-emitted electrons that are both accelerated and shaped into a collimated beam by the electrostatic field geometry established by the gun electrode (grid and anode) configuration used. The electron beam then emerges from the gun assembly through an exit hole in the ground-plane anode with an energy equal to the value of the negative high voltage (gun operating voltage) being applied to the cathode. This use of a direct high voltage to produce a high energy electron beam allows the conversion of input ac power to beam power at greater than 95% efficiency, making electron beam material processing a highly energy-efficient technique. After exiting the gun, the beam passes through an electromagnetic lens and deflection coil system. The lens is used for producing either a focused or defocused beam spot on the workpiece, while the deflection coil is used to either position the beam spot on a stationary location or provide some form of oscillatory motion.In polymers, an electron beam may be used on the material to induce effects such as chain scission (which makes the polymer chain shorter) and cross linking. The result is a change in the properties of the polymer which is intended to extend the range of applications for the material. The effects of irradiation may also include changes in crystallinity as well as microstructure. Usually, the irradiation process degrades the polymer. The irradiated polymers may sometimes be characterized using DSC, XRD, FTIR, or SEM.In poly(vinylidene fluoride-trifluoroethylene) copolymers, high-energy electron irradiation lowers the energy barrier for the ferroelectric-paraelectric phase transition and reduces polarization hysteresis losses in the material.Electron beam processing involves irradiation (treatment) of products using a high-energy electron beam accelerator. Electron beam accelerators utilize an on-off technology, with a common design being similar to that of a cathode ray television.Electron beam processing is used in industry primarily for three product modifications: Crosslinking of polymer-based products to improve mechanical, thermal, chemical and other properties, Material degradation often used in the recycling of materials, and Sterilization of medical and pharmaceutical goods.Nanotechnology is one of the fastest growing new areas in science and engineering. Radiation is early applied tool in this area; arrangement of atoms and ions has been performed using ion or electron beams for many years. New applications concern nanocluster and nanocomposites synthesis.".
- Electron_beam_processing thumbnail Schematic_showing_basic_components_and_operation_of_electron_beam_materials_processing.png?width=300.
- Electron_beam_processing wikiPageID "16070103".
- Electron_beam_processing wikiPageLength "13291".
- Electron_beam_processing wikiPageOutDegree "46".
- Electron_beam_processing wikiPageRevisionID "678780553".
- Electron_beam_processing wikiPageWikiLink Category:Electromagnetism.
- Electron_beam_processing wikiPageWikiLink Category:Electron_beams_in_manufacturing.
- Electron_beam_processing wikiPageWikiLink Category:Industrial_processes.
- Electron_beam_processing wikiPageWikiLink Category:Plastics_industry.
- Electron_beam_processing wikiPageWikiLink Cathode_ray.
- Electron_beam_processing wikiPageWikiLink Cross-link.
- Electron_beam_processing wikiPageWikiLink Cross-linked_polyethylene.
- Electron_beam_processing wikiPageWikiLink Crystallinity.
- Electron_beam_processing wikiPageWikiLink Differential_scanning_calorimetry.
- Electron_beam_processing wikiPageWikiLink ETFE.
- Electron_beam_processing wikiPageWikiLink Electron_beam.
- Electron_beam_processing wikiPageWikiLink Ethylene-vinyl_acetate.
- Electron_beam_processing wikiPageWikiLink Ethylene_tetrafluoroethylene.
- Electron_beam_processing wikiPageWikiLink Fourier_transform_spectroscopy.
- Electron_beam_processing wikiPageWikiLink Gray_(unit).
- Electron_beam_processing wikiPageWikiLink Heat-shrink_tubing.
- Electron_beam_processing wikiPageWikiLink Heat_shrink.
- Electron_beam_processing wikiPageWikiLink Irradiation.
- Electron_beam_processing wikiPageWikiLink LDPE.
- Electron_beam_processing wikiPageWikiLink LLDPE.
- Electron_beam_processing wikiPageWikiLink Linear_low-density_polyethylene.
- Electron_beam_processing wikiPageWikiLink Low-density_polyethylene.
- Electron_beam_processing wikiPageWikiLink Microstructure.
- Electron_beam_processing wikiPageWikiLink Molecular_mass.
- Electron_beam_processing wikiPageWikiLink Molecular_weight.
- Electron_beam_processing wikiPageWikiLink Nylon.
- Electron_beam_processing wikiPageWikiLink Nylon_6.
- Electron_beam_processing wikiPageWikiLink PVC.
- Electron_beam_processing wikiPageWikiLink PVDF.
- Electron_beam_processing wikiPageWikiLink Polyamide.
- Electron_beam_processing wikiPageWikiLink Polybutylene_terephthalate.
- Electron_beam_processing wikiPageWikiLink Polyethylene.
- Electron_beam_processing wikiPageWikiLink Polymer_degradation.
- Electron_beam_processing wikiPageWikiLink Polymethylpentene.
- Electron_beam_processing wikiPageWikiLink Polytetrafluoroethylene.
- Electron_beam_processing wikiPageWikiLink Polyvinyl_chloride.
- Electron_beam_processing wikiPageWikiLink Polyvinylidene_fluoride.
- Electron_beam_processing wikiPageWikiLink Positive_temperature_coefficient.
- Electron_beam_processing wikiPageWikiLink Rad_(unit).
- Electron_beam_processing wikiPageWikiLink Scanning_electron_microscope.
- Electron_beam_processing wikiPageWikiLink Scanning_electron_microscopy.
- Electron_beam_processing wikiPageWikiLink Sterilization_(microbiology).
- Electron_beam_processing wikiPageWikiLink Temperature_coefficient.
- Electron_beam_processing wikiPageWikiLink Tensile_strength.
- Electron_beam_processing wikiPageWikiLink Thermoplastic_polyurethane.
- Electron_beam_processing wikiPageWikiLink Thermoplastic_polyurethanes.
- Electron_beam_processing wikiPageWikiLink Thermoset.
- Electron_beam_processing wikiPageWikiLink Thermosetting_polymer.
- Electron_beam_processing wikiPageWikiLink UHMW.
- Electron_beam_processing wikiPageWikiLink Ultimate_tensile_strength.
- Electron_beam_processing wikiPageWikiLink Ultra-high-molecular-weight_polyethylene.
- Electron_beam_processing wikiPageWikiLink X-ray_crystallography.
- Electron_beam_processing wikiPageWikiLink File:Schematic_showing_basic_components_and_operation_of_electron_beam_materials_processing.png.
- Electron_beam_processing wikiPageWikiLinkText "Electron beam processing systems".
- Electron_beam_processing wikiPageWikiLinkText "Electron beam processing".
- Electron_beam_processing wikiPageWikiLinkText "Electron beam sterilization of wastewater".
- Electron_beam_processing wikiPageWikiLinkText "e-beam path".
- Electron_beam_processing wikiPageWikiLinkText "e-beam".
- Electron_beam_processing wikiPageWikiLinkText "electron beam processing".
- Electron_beam_processing wikiPageWikiLinkText "electrons".
- Electron_beam_processing hasPhotoCollection Electron_beam_processing.
- Electron_beam_processing wikiPageUsesTemplate Template:For.
- Electron_beam_processing wikiPageUsesTemplate Template:Reflist.
- Electron_beam_processing subject Category:Electromagnetism.
- Electron_beam_processing subject Category:Electron_beams_in_manufacturing.
- Electron_beam_processing subject Category:Industrial_processes.
- Electron_beam_processing subject Category:Plastics_industry.
- Electron_beam_processing hypernym Process.
- Electron_beam_processing type Article.
- Electron_beam_processing type Election.
- Electron_beam_processing type Article.
- Electron_beam_processing type Industry.
- Electron_beam_processing type Physic.
- Electron_beam_processing type Process.
- Electron_beam_processing type Science.
- Electron_beam_processing comment "Electron beam processing or electron irradiation is a process which involves using electrons, usually of high energy, to treat an object for a variety of purposes. This may take place under elevated temperatures and nitrogen atmosphere. Possible uses for electron irradiation include sterilization and to cross-link polymers.Electron energies typically varies from the keV to MeV range, depending on the depth of penetration required.".
- Electron_beam_processing label "Electron beam processing".
- Electron_beam_processing sameAs m.03qn7zg.
- Electron_beam_processing sameAs Q17010235.
- Electron_beam_processing sameAs Q17010235.
- Electron_beam_processing wasDerivedFrom Electron_beam_processing?oldid=678780553.
- Electron_beam_processing depiction Schematic_showing_basic_components_and_operation_of_electron_beam_materials_processing.png.
- Electron_beam_processing isPrimaryTopicOf Electron_beam_processing.