Photomultiplier tubes are used in high-end drum scanners, because they are more sensitive to light than the CCD elements used in lower-cost devices. Photomultiplier Tube (PMT), the Silicon Photomultiplier now offers a highly attractive alternative that combines the low-light detection capabilities of the PMT while offering all the benefits of a solid-state sensor. en.wiktionary.org (physics) A device, normally in the form of a tube, that uses a photocathode to convert photons into photoelectrons which are then amplified. To increase sensitivity, a device called a photomultiplier tube (or a PMT) is used. As … photomultiplier tube Also contains definitions of: channel photomultiplier tube, strip dynode photomultiplier tube A vacuum phototube with additional amplification by electron multiplication. A vacuum tube that converts light into electrical energy and amplifies it. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. A channel photomultiplier tube photocathode consists of a @C00970@ electron multiplier (CEM) system for the photoelectrons, and an @A00370@ to collect the final electron current. Photomultipliers are used to measure any process which directly or indirectly emits light. What does photomultiplier mean? en.wiktionary.org. Definition of photomultiplier in the Definitions.net dictionary. Definition of photomultiplier in the Definitions.net dictionary. : Photomultiplier Tubes – Basics and Applications. An array of these tubes is situated behind the sodium iodide crystal and may be placed directly on the crystal, connected to the crystal by light pipes, or optically coupled to the crystal with a silicone-like material. Photomultiplier Tube – Principle of Operation. Most often a photocathode is semi-transparent and usually consists of a thin layer of evaporated Cs, Sb, and K atoms (or a mixture of all three). WikiMatrix. An array of these tubes is situated behind the sodium iodide crystal and may be placed directly on the crystal, connected to the crystal by light pipes, or optically coupled … The prime features of the circular-cage are compactness and fast time response. Noun. Most often a photocathode is semi-transparent and usually consists of a thin layer of evaporated Cs, Sb, and K atoms (or a mixture of all three). It is used to digitize incoming light photons prior to the creation of computerized images in nuclear medicine and other imaging modalities. 3rd ed. Photomultiplier Tubes (PMTs) Light (photons) are converted into photoelectrons by absorbing them in a thin photocathode layer inside a (glass) vacuum tube. ... Photomultiplier. Photomultiplier tubes synonyms, Photomultiplier tubes pronunciation, Photomultiplier tubes translation, English dictionary definition of Photomultiplier tubes. Meaning of photomultiplier. ; The electrons are subsequently accelerated with a high voltage (hundreds of volts) to a first dynode (an electrode), where they generate several secondary electrons. Giga-fren. Bitte beachten Sie, dass alle Definitionen in alphabetischer Reihenfolge aufgeführt sind.Sie können rechts auf Links klicken, um detaillierte Informationen zu jeder Definition anzuzeigen, einschließlich Definitionen in Englisch und Ihrer Landessprache. The elements constituting the reader used in the chemiluminescent assays were as follows: two lasers for reaction mixture illumination; an illumination chamber; optical train with collimating lenses, filter wheel, and shutter; The BlankCell procedure serves to calibrate the chemiluminescence signal received by the, The light drives the photoelectric effect in a, Using readings from a sensitive light detector called a, So now, you're dealing with the problem of getting your signal above the noise level of the, Beth models are equipped with three detectors including a, Czerepinski notes, "that along with being designed for simultaneous acquisition of Cy3 and Cy5 the device features real-time control of a, 31 Physical Review Letters, the duo described using a sensitive, Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content, Determination of sulpiride by capillary electrophoresis with end-column electrogenerated chemiluminescence detection, Quantification of DNA using the luminescent oxygen channeling assay, Dally BlankCell procedure in Elecsys 2010 improves the reproducibility of thyrotropin, free thyroxine, and triidothyronine, New, renewed, and revived confocal: higher performance and more affordable confocal microscopes now provide biologists with views into living cells that they've never had before, UV-Vis-NIR Spectrophotometer with deep measurement capabilities, Photomultiplier tube delivers high-anode sensitivity, Creating imaging platforms for discovery: in the high-tech, highly competitive world of microarray scanners, researchers and lab managers have an assortment of imaging systems to choose from ... and the race just got more crowded. A photomultiplier tube (PMT) converts a light pulse into an electrical signal of measurable magnitude. A photomultiplier tube, useful for light detection of very weak signals, is a photoemissive device in which the absorption of a photon results in the emission of an electron. en.wiktionary.2016 [noun] A device, normally in the form of a tube, that uses a photocathode to convert photons into photoelectrons which are then amplified. er tube a detector that amplifies a signal (by as much as 106) of electromagnetic radiation by an acceleration of electrons released from a photocathode through a series of dynodes; as each electron strikes a dynode stage, 3-4 electrons are liberated and accelerated to the subsequent dynode. en.wiktionary.2016 [noun] plural of [i]photomultiplier tube[/i] Example sentences with "photomultiplier tubes", translation memory. Photomultiplier tube, a vacuum tube converting incident photons into an electric signal. It is used to digitize incoming light photons prior to the creation of computerized images in nuclear medicine and other imaging modalities. “Photomultiplier tube.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/photomultiplier%20tube. Medical Dictionary, © 2009 … photomultiplier tube definition: A vacuum tube that converts light into electrical energy and amplifies it. Ionizing radiation enters the scintillator and interacts with the scintillator material. PHOTONIS has … PHOTO MULTIPLIERS BY, MD ANAS AHMAD 2. Section 4.2 explains dynode types, structures and typical char-acteristics. https://medical-dictionary.thefreedictionary.com/photomultiplier+tube, a detector that amplifies a signal (by as much as 10. 1. The side-on type re-ceives incident light through the side of the glass bulb, while in the head-on type, it is received through the end of the glass bulb. Search photomultiplier tube and thousands of other words in English definition and synonym dictionary from Reverso. … Please tell us where you read or heard it (including the quote, if possible). photomultiplier tube definition in English dictionary, photomultiplier tube meaning, synonyms, see also 'photometer',photometrically',photopolymer',photonuclear'. Meaning of photomultiplier. Photomultiplier tubes are used in high-end drum scanners, because they are more sensitive to light than the CCD elements used in lower-cost devices. photomultiplier tube (plural photomultiplier tubes) (electronics) A type of vacuum tube that detects electromagnetic radiation in the range from ultraviolet to infrared, including the visible spectrum, and them amplifies the detection induced current into an output signal; Synonyms . The SiPM features low-voltage operation, insensitivity to magnetic fields, mechanical robustness and excellent uniformity of response. Photomultiplier tubes (often abbreviated as PMT) make use of this external photoelectric effect and are superior in response speed and sensitivity (low-light-level detection). Alle Definitionen von PMT Wie oben erwähnt, sehen Sie in der folgenden Tabelle alle Bedeutungen von PMT. Definition of Photomultiplier. The basic part of the CEM is a tube with a semiconducting inner surface. • It is photo-emissive device in which absorption of photon results in emission of electron. They are widely used in medical equipment, analytical instruments and industrial measurement systems. These detectors work by amplifying the electrons generated by a photocathode exposed to a photon flux. Design. Photomultiplier tubes having both of the following characteristics: a. WikiMatrix. Photomultiplier tubes (photomultipliers or PMTs for short), members of the class of vacuum tubes, and more specifically vacuum phototubes, are extremely sensitive detectors of light in the ultraviolet, visible, and near-infrared ranges of the electromagnetic spectrum. Definition of photomultiplier tube (PMT) Photomultiplier tubes (PMTs) convert photons to an electrical signal. photomultiplier tube. A PMT consists of a photocathode and a series of dynodes in an evacuated glass enclosure. Photomultiplier detection system DC operation (contiuous light beam) AC operation (chopped light beam) [Cell definitions and equations] [Student assignment handout] [OpenOffice and Excel Version] A simulation of measurement of light intensity by a photomultiplier tube (PMT). A photomultiplier tube, useful for light detection of very weak signals, is a photoemissive device in which the absorption of a photon results in the emission of an electron. The operation of scintillation counters and photomultiplier tubes is summarized in the following points:. Thon, "Fully digital arrays of silicon photomultipliers (dSiPM)--a scalable alternative to vacuum photomultiplier tubes (PMT)," in Proceedings of the 2nd International Conference on Technology and Instrumentation in Particle Physics (Tipp '11), vol. In a photomultiplier tube, electrons are emitted from a photocathode and accelerated in a beam that strikes the dynode, which is a polished metal electrode suitably biased. Side-on tubes are also common. 2006, S.17–18 – 2.3 Electron Multiplier (Dynode Section) Definition of Photomultiplier Tube (PMT): A part of the PET detector that receives the electromagnetic energy from the scintillator cristal and transforms that energy into electric pulses. The photomultiplier is an extremely sensitive light detector providing a current output proportional to light intensity. Photomultiplier Tubes (PMT) PMT is the technology state of the art at present. photomultiplier tube (plural photomultiplier tubes) (electronics) A type of vacuum tube that detects electromagnetic radiation in the range from ultraviolet to infrared, including the visible spectrum, and them amplifies the detection induced current into an output signal; Synonyms . When attached to the new high-gain photomultiplier tubes and strung into the array of amplifiers, pulse-height analyzers, and scalers that emerged from the Rad Lab and Los Alamos, then and only then did the scintillator and Cerenkov radiation became part of the material culture of postwar physics.. Photomultiplier Tubes (PMTs) sind Photonendetektionsgeräte, die den photoelektrischen Effekt in Kombination mit Sekundäremission nutzen, um Licht in ein elektrisches Signal umzuwandeln. 8 - Photomultiplier tube basics Still setting the standard For more than sixty years, photomultipliers have been used to detect low-energy photons in the UV to visible range, high-energy photons (X-rays and gamma rays) and ionizing particles using scintillators. a photoemissive device in which the absorption of a photon results in the emission of an electron When light is incident on the photocathode, it emits electrons into the vacuum tube. * Consists of a vaccum tube with a photocathode followed by a cascade of cathodes. photomultiplier tubes Definitions. These example sentences are selected automatically from various online news sources to reflect current usage of the word 'photomultiplier tube.' 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