• Thumbnail for Photocathode
    A photocathode is a surface engineered to convert light (photons) into electrons using the photoelectric effect. Photocathodes are important in accelerator...
    17 KB (2,302 words) - 16:27, 12 September 2024
  • Thumbnail for Photomultiplier tube
    other vacuum tubes), containing a photocathode, several dynodes, and an anode. Incident photons strike the photocathode material, which is usually a thin...
    36 KB (4,464 words) - 17:05, 3 October 2024
  • source enter an objective lens which focuses an image into a photocathode. The photocathode releases electrons via the photoelectric effect as the incoming...
    26 KB (3,779 words) - 15:25, 12 December 2023
  • Thumbnail for Night-vision device
    illuminate targets. Their image-intensifier tubes used an anode and an S-1 photocathode, made primarily of silver, cesium, and oxygen, and electrostatic inversion...
    74 KB (6,707 words) - 01:02, 6 October 2024
  • Thumbnail for Electron gun
    electric field generation (DC or RF), by emission mechanism (thermionic, photocathode, cold emission, plasmas source), by focusing (pure electrostatic or with...
    6 KB (705 words) - 13:28, 31 August 2024
  • Thumbnail for Photodetector
    (PMTs): PMTs are vacuum tube-based photodetectors. They consist of a photocathode that emits electrons when illuminated, followed by a series of dynodes...
    21 KB (2,417 words) - 14:09, 12 July 2024
  • Thumbnail for Photoelectric effect
    emitted. These are extremely light-sensitive vacuum tubes with a coated photocathode inside the envelope. The photo cathode contains combinations of materials...
    54 KB (6,557 words) - 18:43, 10 October 2024
  • Thumbnail for Back-illuminated sensor
    the photocathode layer by flipping the silicon wafer during manufacturing and then thinning its reverse side so that light can strike the photocathode layer...
    16 KB (1,651 words) - 06:09, 7 July 2024
  • Thumbnail for Scintillation counter
    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...
    14 KB (1,598 words) - 11:57, 11 July 2024
  • Thumbnail for Charge-coupled device
    between the photocathode and the MCP is reversed, the emitted photoelectrons are not accelerated towards the MCP but return to the photocathode. Thus, no...
    50 KB (6,382 words) - 11:26, 8 October 2024
  • Thumbnail for Night vision
    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...
    22 KB (2,599 words) - 13:14, 2 October 2024
  • Thumbnail for Secondary emission
    In a photomultiplier tube, one or more electrons are emitted from a photocathode and accelerated towards a polished metal electrode (called a dynode)...
    6 KB (592 words) - 00:22, 1 April 2023
  • traversed by the X-ray beam. Transmitted intensities now fall on the photocathode stimulating it to produce electrons in quantities external to the light...
    2 KB (241 words) - 18:31, 15 February 2019
  • Thumbnail for Electron
    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...
    12 KB (1,460 words) - 09:54, 11 August 2024
  • Thumbnail for Ultraviolet
    instabilities. Ultraviolet can be detected by suitable photodiodes and photocathodes, which can be tailored to be sensitive to different parts of the UV...
    117 KB (12,618 words) - 22:04, 8 October 2024
  • Thumbnail for Video camera tube
    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...
    6 KB (732 words) - 01:16, 18 May 2024
  • Thumbnail for Tellurium
    photocathodes used in solar blind photomultiplier tubes and for high brightness photoinjectors driving modern particle accelerators. The photocathode...
    61 KB (6,983 words) - 20:46, 12 October 2024
  • light intensifiers or infrared vision. The former technology uses a photocathode to convert light (in the visible or near infrared portions of the electromagnetic...
    9 KB (1,085 words) - 01:35, 7 September 2024
  • Thumbnail for Dynode
    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...
    3 KB (364 words) - 08:26, 5 March 2024
  • Thumbnail for Radiography
    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...
    35 KB (3,881 words) - 08:03, 16 May 2024
  • research, as well as material characterization. A photoinjector comprises a photocathode, electron gun (AC or DC), power supplies, driving laser system, timing...
    7 KB (766 words) - 15:16, 12 September 2024
  • Thumbnail for Caesium iodide
    image intensifier tube found in fluoroscopy equipment. Caesium iodide photocathodes are highly efficient at extreme ultraviolet wavelengths. Bulk caesium...
    9 KB (653 words) - 13:50, 24 September 2024
  • Thumbnail for AstroSat
    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...
    31 KB (3,049 words) - 14:06, 17 July 2024
  • Thumbnail for Image dissector
    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...
    12 KB (1,463 words) - 22:53, 30 September 2024
  • Thumbnail for Photoelectrolysis of water
    oxygen. Photoanode Reaction (Oxygen Evolution): H2O ā†’ 2H++1 2O2+ 2eāˆ’ Photocathode Reaction (Hydrogen Evolution): 2H++ 2eāˆ’ ā†’ H2 These half-reactions show...
    7 KB (775 words) - 23:39, 6 July 2024
  • Thumbnail for Orion Nebula
    of condensations in the center of the Orion Nebula, by means of S 20 photocathodes associated with a Lallemand electronic camera". Astronomy & Astrophysics...
    45 KB (4,810 words) - 20:25, 23 September 2024
  • 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...
    14 KB (1,512 words) - 21:18, 25 February 2024
  • Thumbnail for Vacuum tube
    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