TERMIUM Plus^®

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An instrument similar to an electron microscope in that a beam of electrons is used to scan the surface of a specimen.  6, fiche 1, Anglais, - scanning%20electron%20microscope

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The beam is moved in a point-to-point manner over the surface of the specimen. These electrons are deflected, collected, accelerated, and directed against a scintillator. The large number of photons thus created are converted into an electric signal that, in turn, modulates the beam scanning the surface of the specimen. The image produced appears to be three-dimensional and lifelike.  6, fiche 1, Anglais, - scanning%20electron%20microscope

Fiche 1,  Justifications,  Français

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Microscope électronique à balayage (MEB) [...] Un faisceau d'électrons mitraille l'échantillon. Au contact de la surface, le faisceau perd de l'énergie, et émet des électrons secondaires, des rayons X, de la lumière. Or l'intensité de ces électrons secondaires dépend de la nature du point bombardé et du relief, ce qui permet, après analyse, de construire une image. On voit ainsi la surface des bactéries, pollens, cristaux...  7, fiche 1, Français, - microscope%20%C3%A9lectronique%20%C3%A0%20balayage

Fiche 1,  Justifications,  Espagnol

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Los microscopios electrónicos de barrido se fundan en el mismo principio de la visión natural y proporcionan imágenes extraordinariamente detalladas de objetos opacos. [...] Un haz primario de electrones caracterizado por su fineza barre la superficie del objeto [...] punto por punto y línea por línea. Así herido por el haz, cada uno de los puntos emite electrones secundarios que, debidamente colectados, forman una señal que modula el haz catódico de un catoscopio de televisión. Este haz barre la pantalla luminiscente en sincronismo con el haz primario y forma en ella la imagen del objeto considerablemente ampliado.  2, fiche 1, Espagnol, - microscopio%20electr%C3%B3nico%20de%20barrido

Fiche 2,  Justifications,  Anglais

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The ion beam figuring is a kind of advanced technology of mirror processing. It has the advantages of high processing precision, high speed and no damage to the mirror surface.  3, fiche 2, Anglais, - ion%20beam%20figuring

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Ion beam figuring provides a highly deterministic method for the final precision figuring of optical components with advantages over conventional methods. The process involves bombarding a component with a stable beam of accelerated particles that selectively removes material from the surface.  4, fiche 2, Anglais, - ion%20beam%20figuring

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Fiche 2,  Justifications,  Espagnol

Fiche 3,  Justifications,  Anglais

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A microscope that is similar to the electron microscope but uses protons instead of electrons as the charged particles.  1, fiche 3, Anglais, - proton%20microscope

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The proton-scattering microscope. This instrument uses a beam of protons from an ion source or gun. The beam is focussed and accelerated onto a crystal of a metal such as copper or tungsten, which serves as the target. The pattern of scattered protons is recorded on a fluorescent screen; the blocking patterns provide information on the orientation of the crystals.  2, fiche 3, Anglais, - proton%20microscope

Fiche 3,  Justifications,  Français

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Dispositif d'optique électronique analogue au microscope électronique, mais dans lequel les porteurs électrisés sont des protons.  1, fiche 3, Français, - microscope%20protonique

Fiche 3,  Justifications,  Espagnol

Fiche 4,  Justifications,  Anglais

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Method of Heating, in which the heat is generated by the impingement of an electron beam on the workpiece.  4, fiche 4, Anglais, - electron%20beam%20heating

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A stream of electrons accelerated from a heated filament... and focused into a narrow beam can be used to provide a heat source for welding.  5, fiche 4, Anglais, - electron%20beam%20heating

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A type of evaporation that uses the energy of a focused electron beam to provide the required heat.  2, fiche 4, Anglais, - electron%20beam%20heating

Fiche 4,  Justifications,  Français

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Mode de chauffage, en général sous vide, qui engendre la chaleur par l'impact d'un faisceau électronique sur la pièce.  1, fiche 4, Français, - chauffage%20par%20faisceau%20%C3%A9lectronique

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[...] utiliser un faisceau d'électrons émis par une cathode portée à incandescence dans le vide pour fondre un métal et former un cordon de soudure.  2, fiche 4, Français, - chauffage%20par%20faisceau%20%C3%A9lectronique

Fiche 4,  Justifications,  Espagnol

Fiche 5,  Justifications,  Anglais

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Spark source mass spectrography(SSMS) uses an rf spark between two conducting sample pins, contained in a high vacuum source housing, to strip electrons from elements contained in the sample, thus causing positively charged ions to be formed, which can then be accelerated into a typically double focusing mass spectrograph, then onto a total integrating photoplate where impingement of the ions can be photographically enhanced by development to record all ions contained in the beam.  2, fiche 5, Anglais, - spark%20source%20mass%20spectrography

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Spark source mass spectrographic examinations of most organic matrices can be accomplished by reducing the organic matrix to an ash.  2, fiche 5, Anglais, - spark%20source%20mass%20spectrography

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Fiche 6,  Justifications,  Anglais

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Ion implantation is a precise and reproducible method of doping semiconductors to achieve a desired characteristic. With this equipment, ions of the particular dopant are energized and accelerated to the point where they can be driven in a focused beam directly into the silicon wafer. This technique assures uniform, accurately controlled depth of implantation and ionic diffusion in the wafer, and is highly repeatable on succeeding wafers.  1, fiche 6, Anglais, - ion%20beam%20implantation%20equipment

Fiche 6,  Justifications,  Français

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équipements de production à commande par programme enregistré par l'implantation ionique ayant des courants du faisceau de 5 m A ou plus.  1, fiche 6, Français, - %C3%A9quipement%20par%20implantation%20ionique

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Fiche 7,  Justifications,  Anglais

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The sector-focused cyclotron is another modification of the classical cyclotron.... Its advantage... is that the beam is not pulsed and is more intense. The frequency of the accelerating voltage is constant, and the orbital frequency of the particles is kept constant as they are accelerated by causing the average magnetic field on the orbit to increase with orbit radius.  1, fiche 7, Anglais, - sector%2Dfocused%20cyclotron

Fiche 7,  Justifications,  Français

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Cyclotron dans lequel la focalisation est assurée par des variations azimutales du champ de guidage dues à la disposition en secteurs des faces polaires.  2, fiche 7, Français, - cyclotron%20%C3%A0%20focalisation%20par%20secteurs

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Fiche 8,  Justifications,  Anglais

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Principles of colliding-beam systems.... Unlike fixed-target systems(cyclotrons, synchrotrons, linear accelerators) in which a beam of accelerated particles traverses a fixed target, colliding-beam systems use the full energy of each particle to produce reactions.  2, fiche 8, Anglais, - fixed%20target

Fiche 8,  Justifications,  Français

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Objectif stationnaire à travers lequel se produisent des collisions de particules.  2, fiche 8, Français, - cible%20fixe

Fiche 8,  Justifications,  Espagnol

Fiche 9,  Justifications,  Anglais

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proton beams, a specialty of Soviet beam weapon research, require an accelerated electron beam as a "seed", and are then accelerated in their own right.  2, fiche 9, Anglais, - proton%20beam

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