Information om | Engelska ordet PHOTOCATHODE

Exempel på hur man kan använda PHOTOCATHODE i en mening

• In a photomultiplier tube, one or more electrons are emitted from a photocathode and accelerated towards a polished metal electrode (called a dynode).
• An image 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, which serves as an electron detector.
• Optoelectronic streak cameras work by directing the light onto a photocathode, which when hit by photons produces electrons via the photoelectric effect.
• These half-reactions show the fundamental chemistry involved in photoelectrolysis, where the photoanode facilitates oxygen evolution and the photocathode supports hydrogen evolution.
• The detectors are joined to photomultipliers; a photocathode converts the light into electrons; and then by using dynodes to generate electron cascades through delta ray production, the signal is amplified.
• Phototubes operate according to the photoelectric effect: Incoming photons strike a photocathode, knocking electrons out of its surface, which are attracted to an anode.
• A potential difference (25-35 kilovolts) created between the anode and photocathode then accelerates these photoelectrons while electron lenses focus the beam down to the size of the output window.
• The throughput of the EUVE Spectrometer was determined by the combined effects of the mirrors' and gratings' coating reflectivities, which were functions of both wavelength and grazing angle, the filter transmissions, and the quantum efficiency functions of the detector photocathode materials.
• The FUV detector consists of a CsI photocathode with a MgF input optic, the NUV detector consists of CsTe photocathode with a fused-silica input optic and the visible detector consists of an alkali-antimonide photocathode with a fused-silica input optic.
• One of the main feature of this ERL is a superconducting laser photocathode RF gun powered by a 1MW CW klystron and equipped with a load-lock system for the insertion of high quantum efficiency photocathodes.
• A photoinjector comprises a photocathode, electron gun (AC or DC), power supplies, driving laser system, timing and synchronization system, emittance compensation magnets.

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