TERMIUM Plus^®

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this device utilizes the interaction of a relativistic electron beam with an alternating magnetic field. It offers the potential for very high average power operation with efficiencies between 30 and 50 percent at essentially any chosen wavelength.  3, fiche 1, Anglais, - free%20electron%20laser

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laser où la lumière destinée à être amplifiée est un rayonnement émis par des faisceaux d'électrons accélérés.  4, fiche 1, Français, - laser%20%C3%A0%20%C3%A9lectrons%20libres

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Fiche 2,  Justifications,  Anglais

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The need for high efficiency devices is self-evident in the field of space photovoltaics, for power generation on satellites : the devices of choice are multijunction tandem cells, whose costs are not actually a big concern if compared to the overall building and deployment costs of a satellite.  1, fiche 2, Anglais, - space%20photovoltaics

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Le photovoltaïque spatial. L'atmosphère absorbe une partie de l'énergie solaire. Si on plaçait des panneaux photovoltaïques dans l'espace, on récupérerait plus efficacement l'énergie du Soleil [...] Il s'agit de mettre des km² de panneaux solaires en orbite géostationnaire, à 36 000 km² d'altitude. L'énergie solaire reçue est plus intense et on oriente les panneaux, pour un éclairement maximal. On reçoit ainsi, en moyenne, 8 fois plus d'énergie par unité de surface qu'au sol.  1, fiche 2, Français, - photovolta%C3%AFque%20spatial

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Magnetoplasmadynamic(MPD) thrusters pass a large current radially outwards through a neutral plasma, from a central cathode to an annular anode. The radial current induces an azimuthal, circular magnetic field. The Lorentz body force acting on ions moving in the discharge current accelerates the plasma along the axis of the electrode structure. MPD thrusters operate at high power levels, kilowatts to megawatts, and provide high thrust with moderate specific impulse. A variant of this design uses an externally applied magnetic field to enable operation at lower power levels. MPD thrusters have been tested in the laboratory and have flown on test and demonstration missions. MPD thrusters are an insufficiently mature technology and consume too much power to be considered as candidates to provide primary propulsion of future out of Earth orbit missions and were not considered for SMART-1.  3, fiche 3, Anglais, - magnetoplasmadynamic%20thruster

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The pulsed plasma thruster(PPT) with solid propellant is used for low power propulsion systems; typically with an average power less than thirty watts. Capacitor stored electrical energy is used to create a pulsed arc discharge across the face of a block of propellant, teflon in most implementations to date. The combination of thermal flux, particle bombardment and surface reactions ablates and ionises a small amount of the solid material... The peak discharge current is high, in the region of tens of kA. The self-induced magnetic field acts on the ions moving in the electric field creating the discharge to create a Lorentz body force that accelerates the plasma. Teflon PPTs have enjoyed limited use in east-west station keeping and sun pointing applications. PPTs do not produce sufficient thrust to be considered as candidates to provide primary propulsion of future out of Earth orbit missions and were not considered for SMART-1.  2, fiche 4, Anglais, - pulsed%20plasma%20thruster

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Kinetic energy kill systems can either be of the rocket-propelled missile type, or of the hypervelocity gun system. The High Frontier study sees the deployment of carrier satellites with conventional missiles as a practical proposition. The total mass of such a system precludes comprehensive deployment. A more promising area for research into kinetic energy kill systems is to be the hypervelocity electromagnetic railgun. This system uses a high energy electromagnetic field to accelerate a hit-to-kill projectile to speed of the order of 5-25 km per second. Again, the power requirements for such a system are prodigious, and are likely to need nuclear generators.  2, fiche 5, Anglais, - hypervelocity%20electromagnetic%20railgun

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Energy Density: one (1) mW.-hr/cm² (milliwatt hour per square centimeter) during any zero point one (0.1) hour period.  2, fiche 6, Anglais, - milliwatthour

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Power Instruments.... SC-30 [trademark] Series of Field Standards.... Ports for both high(10 microwatthours/pulse) and low(100 milliwatthours/pulse) outputs to easily interface with a variety of equipment.  1, fiche 6, Anglais, - milliwatthour

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Les microbatteries lithium en quête de ruptures technologiques. [...] La quantité d'énergie embarquée sera de l'ordre du milliwatt.heure, et l'intensité délivrée sera de quelques centaines de micro-ampères/heure.  2, fiche 6, Français, - milliwattheure

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milliwatt : Domaines d'utilisation de [cette] unité [de mesure mécanique] : puissance des résistances et des composants d'équipements électroniques et d'équipements de mesures; puissance des lasers de surveillance; télécommunications.  3, fiche 6, Français, - milliwattheure

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milliwatt.heure : s'écrit précisément : milliwatt[point centré]heure.  1, fiche 6, Français, - milliwattheure

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Voir aussi «milliwatt».  1, fiche 6, Français, - milliwattheure

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An electromagnet whose coils are made of a type II superconductor with a high transition temperature and extremely high critical field, such as niobium tin, Nb3Sn; it is capable of generating magnetic fields of 100, 000 oersteds and more with no steady power dissipation.  1, fiche 7, Anglais, - superconducting%20magnet

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Il faudra (...) qu'aient été trouvées des solutions aux problèmes des aimants supraconducteurs de grande taille.  1, fiche 7, Français, - aimant%20supraconducteur

Fiche 7,  Justifications,  Espagnol