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final anode

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  • Secondary emission — is a phenomenon where additional electrons, called secondary electrons, are emitted from the surface of a material when an incident particle (often, charged particle such as electron or ion) impacts the material with sufficient energy. The number …   Wikipedia

  • Bleeder resistor — A bleeder resistor is a resistor placed in parallel with a high voltage supply for the purposes of discharging the energy stored in the power source s filter capacitors or other components that store electrical energy when the equipment is turned …   Wikipedia

  • Tripler (voltage multiplier) — A tripler is device used to multiply an ac voltage by 3. It is constructed from a chain of diodes and capacitors.A tripler is the most popular type of voltage multiplier, with multipliers able to multiply to various ratios of input voltage. These …   Wikipedia

  • List of vacuum tubes — This is a list of vacuum tubes or thermionic valves. Before the advent of semiconductor devices, hundreds of tube types were used in consumer and industrial electronics; today only a few types are still used in specialized applications. Contents… …   Wikipedia

  • metallurgy — metallurgic, metallurgical, adj. metallurgically, adv. metallurgist /met l err jist/ or, esp. Brit., /meuh tal euhr jist/, n. /met l err jee/ or, esp. Brit., /meuh tal euhr jee/, n. 1. the technique or science of working or heating metals so as… …   Universalium

  • spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …   Universalium

  • Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… …   Wikipedia

  • Direct methanol fuel cell — Direct methanol fuel cells or DMFCs are a subcategory of proton exchange fuel cells in which methanol is used as the fuel. Their main advantage is the ease of transport of methanol, an energy dense yet reasonably stable liquid at all… …   Wikipedia

  • harbours and sea works — Introduction harbour also spelled  harbor        any part of a body of water and the manmade structures surrounding it that sufficiently shelters a vessel from wind, waves, and currents, enabling safe anchorage or the discharge and loading of… …   Universalium

  • History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… …   Wikipedia

  • Experience de Franck et Hertz — Expérience de Franck et Hertz L expérience de Franck et Hertz est une expérience établie pour la première fois en 1914 par James Franck et Gustav Hertz[1]. Elle a pour objet de prouver la quantification des niveaux d énergie des électrons dans… …   Wikipédia en Français

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