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A gas electron multiplier (GEM) is a type of gaseous ionization detector used in nuclear and particle physics and radiation detection. All gaseous ionization detectors are able to collect the electrons released by ionizing radiation , guiding them to a region with a large electric field , and thereby initiating an electron avalanche .
The White House, official residence of the president of the United States, in July 2008. The president of the United States is the head of state and head of government of the United States, [1] indirectly elected to a four-year term via the Electoral College. [2]
German tanks of the Neubaufahrzeug type in Oslo in April 1940. Germany invaded both Norway and Denmark on 9 April 1940. [1] Norway was very important to Germany for two reasons: firstly as a base for naval units to harass Allied shipping in the North Atlantic and Arctic Oceans, and secondly to secure shipments of iron ore coming in from Sweden through the port of Narvik. [2]
The MicroMegas detector (Micro-Mesh Gaseous Structure) is a gaseous particle detector and an advancement of the wire chamber.Invented in 1996 by Georges Charpak and Ioannis Giomataris, [1] Micromegas detectors are mainly used in experimental physics, in particular in particle physics, nuclear physics and astrophysics for the detection of ionizing particles.
Gas source inlet or gas switching valve – gaseous samples in collection bottles are connected to what is most commonly a six-port switching valve. The carrier gas flow is not interrupted while a sample can be expanded into a previously evacuated sample loop. Upon switching, the contents of the sample loop are inserted into the carrier gas stream.
Stages in the detection of a latent deviation When searching for a latent deviation our attention is directed to the covered eye. When performing the cover/uncover test the uncovered eye does not move; however the eye that is under the cover will deviate and return to a straight position when the cover is removed.
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