A photocathode is a surface engineered to convert light (photons) into electrons using the photoelectric effect. Photocathodes are important in accelerator...
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Photomultiplier tube (section Improved photocathodes)
other vacuum tubes), containing a photocathode, several dynodes, and an anode. Incident photons strike the photocathode material, which is usually a thin...
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source enter an objective lens which focuses an image into a photocathode. The photocathode releases electrons via the photoelectric effect as the incoming...
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illuminate targets. Their image-intensifier tubes used an anode and an S-1 photocathode, made primarily of silver, cesium, and oxygen, and electrostatic inversion...
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electric field generation (DC or RF), by emission mechanism (thermionic, photocathode, cold emission, plasmas source), by focusing (pure electrostatic or with...
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(PMTs): PMTs are vacuum tube-based photodetectors. They consist of a photocathode that emits electrons when illuminated, followed by a series of dynodes...
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emitted. These are extremely light-sensitive vacuum tubes with a coated photocathode inside the envelope. The photo cathode contains combinations of materials...
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the photocathode layer by flipping the silicon wafer during manufacturing and then thinning its reverse side so that light can strike the photocathode layer...
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energy deposited by the ionizing particle. These can be directed to the photocathode of a photomultiplier tube which emits at most one electron for each arriving...
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between the photocathode and the MCP is reversed, the emitted photoelectrons are not accelerated towards the MCP but return to the photocathode. Thus, no...
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strikes the photocathode and on a wavelength the human eye can see. This is much like a CRT television, but instead of color guns the photocathode does the...
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In a photomultiplier tube, one or more electrons are emitted from a photocathode and accelerated towards a polished metal electrode (called a dynode)...
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traversed by the X-ray beam. Transmitted intensities now fall on the photocathode stimulating it to produce electrons in quantities external to the light...
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television sets. In a photomultiplier tube, every photon striking the photocathode initiates an avalanche of electrons that produces a detectable current...
154 KB (15,572 words) - 00:49, 16 October 2024
absorbency/scatter input window, typically aluminum, input fluorescent screen, photocathode, electron optics, output fluorescent screen and output window. These...
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instabilities. Ultraviolet can be detected by suitable photodiodes and photocathodes, which can be tailored to be sensitive to different parts of the UV...
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dissector is a camera tube that creates an "electron image" of a scene from photocathode emissions (electrons) which pass through a scanning aperture to an anode...
109 KB (12,464 words) - 13:39, 26 September 2024
This is also part of traditional television and computer screens. Photocathodes may also be built in as a part of an electron gun, using the photoelectric...
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Tellurium (section Photocathodes)
photocathodes used in solar blind photomultiplier tubes and for high brightness photoinjectors driving modern particle accelerators. The photocathode...
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light intensifiers or infrared vision. The former technology uses a photocathode to convert light (in the visible or near infrared portions of the electromagnetic...
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Such an arrangement is able to amplify the tiny current emitted by the photocathode, typically by a factor of one million. The electrons emitted from the...
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iodide (CsI). When hit by X-rays material phosphors which causes the photocathode adjacent to it to emit electrons. These electrons are then focused using...
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research, as well as material characterization. A photoinjector comprises a photocathode, electron gun (AC or DC), power supplies, driving laser system, timing...
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image intensifier tube found in fluoroscopy equipment. Caesium iodide photocathodes are highly efficient at extreme ultraviolet wavelengths. Bulk caesium...
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The FUV detector consists of a CsI photocathode with a MgF2 input optic, the NUV detector consists of CsTe photocathode with a fused-silica input optic and...
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dissector, also called a dissector tube, is a video camera tube in which photocathode emissions create an "electron image" which is then swept up, down and...
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oxygen. Photoanode Reaction (Oxygen Evolution): H2O ā 2H++1 2O2+ 2eā Photocathode Reaction (Hydrogen Evolution): 2H++ 2eā ā H2 These half-reactions show...
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of condensations in the center of the Orion Nebula, by means of S 20 photocathodes associated with a Lallemand electronic camera". Astronomy & Astrophysics...
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p+/p-Si photocathode, the main product is formic acid with small amount of formaldehyde and methanol. However, for p-InP and p-CdTe photocathode, both carbon...
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principle of secondary emission, whereby a single electron emitted by the photocathode strikes a special sort of anode known as a dynode causing more electrons...
120 KB (15,367 words) - 03:53, 22 September 2024