The photomultiplier tubes--422 of them so far--are the eyes of the Antarctic Muon and Neutrino Detector Array (AMANDA), an instrument whose mission is to detect elusive subatomic particles known as neutrinos arriving from space (SN: 10/5/91, p. Icy observatory launches neutrino hunt Test Your Knowledge - and learn some interesting things along the way. Photomultiplier Tubes (PMTs) sind Photonendetektionsgeräte, die den photoelektrischen Effekt in Kombination mit Sekundäremission nutzen, um Licht in ein elektrisches Signal umzuwandeln. Kinds of photomultiplier include: Photomultiplier tube, a vacuum tube converting incident photons into an electric signal. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! As … For high speed response, there are usually capacitors as … Photomultiplier definition, an extremely sensitive detector of light and of other radiation, consisting of a tube in which the electrons released by radiation striking a photocathode are accelerated, greatly amplifying the signal obtainable from small quantities of radiation. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. https://medical-dictionary.thefreedictionary.com/photomultiplier+tube, a detector that amplifies a signal (by as much as 10. Definition of photomultiplier in the Definitions.net dictionary. A photomultiplier absorbs light emitted by the scintillator and re-emit it in the form of electrons via the photoelectric effect. Definition of photomultiplier tube : a vacuum tube that detects light especially from dim sources through the use of photoemission and successive instances of secondary emission to produce enough electrons to generate a useful current — called also photomultiplier Examples of photomultiplier tube in a Sentence They are widely used in medical equipment, analytical instruments and industrial measurement systems. 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. They have a high internal gain and are sensitive detectors for low-intensity applications such as fluorescence spectroscopy. This photon is multiplied in a photomultiplier tube which converts light into an electrical signal. Photomultiplier tubes synonyms, Photomultiplier tubes pronunciation, Photomultiplier tubes translation, English dictionary definition of Photomultiplier tubes. The basic part of the CEM is a tube with a semiconducting inner surface. The layout shown is for an "end-on" tube. Build a city of skyscrapers—one synonym at a time. Ionizing radiation enters the scintillator and interacts with the scintillator material. See more. The key advantage of a photomultiplier tube is that photoelectrons are amplified using a chain of dynodes. They are widely used in medical equipment, analytical instruments and industrial measurement systems. photomultiplier tube Also contains definitions of: channel photomultiplier tube, strip dynode photomultiplier tube A vacuum phototube with additional amplification by electron multiplication. Photomultiplier tubes (PMTs) are a photon detection device that uses the photoelectric effect combined with secondary emission to convert light into an electrical signal. 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. Photomultiplier tubes having both of the following characteristics: a. WikiMatrix. Photomultiplier tubes (PMTs for short) are members of the class of vacuum tubes, and more specifically vacuum phototubes, which are extremely sensitive detectors of light in the ultraviolet, visible, and near-infrared ranges of the electromagnetic spectrum. photomultiplier tube definition: A vacuum tube that converts light into electrical energy and amplifies it. 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). The photomultiplier tubes--422 of them so far--are the eyes of the Antarctic Muon and Neutrino Detector Array (AMANDA), an instrument whose mission is to detect elusive subatomic particles known as neutrinos arriving from space (SN: 10/5/91, p. Icy observatory launches neutrino hunt. Definition of photomultiplier in the Definitions.net dictionary. The prime features of the circular-cage are compactness and fast time response. (Keywords: automation * microarrays * optics), Atom tinkerer's paradise: innovations to atom-imaging microscopes create labs on tips, Photon Amplification By Stimulated Emission of Radiation :-), Photon Assisted Scanning Tunnel Microscopy. What made you want to look up photomultiplier tube? PMT (abbreviation) Hypernyms . Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. WikiMatrix. Search photomultiplier tube and thousands of other words in English definition and synonym dictionary from Reverso. The photomultiplier is an extremely sensitive light detector providing a current output proportional to light intensity. PHOTOMULTIPLIERS DEFINED Called photomultiplier tubes (PMTs) members of the class of vacuum phototubes extremely sensitive light detectors providing a current output proportional to light intensity. 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. • It is photo-emissive device in which absorption of photon results in emission of electron. 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. What does photomultiplier mean? b) Transmission Mode CONSTRUCTION The photomultiplier tube generally has a photocathode in ei-ther a side-on or a head-on configuration. Section 4.2 explains dynode types, structures and typical char-acteristics. They have a high internal gain and are sensitive detectors for low-intensity applications such as fluorescence spectroscopy . 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. Source: wikipedia.org License: Public Domain. 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. 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. Meaning of photomultiplier. Information and translations of photomultiplier in the most comprehensive dictionary definitions resource on the web. Photomultiplier Tubes (PMTs) Light (photons) are converted into photoelectrons by absorbing them in a thin photocathode layer inside a (glass) vacuum tube. These electrons are focused towards the electron multipliers (dynodes), which multiply the signal by secondary emission. 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. Definition of photomultiplier tube (PMT) Photomultiplier tubes (PMTs) convert photons to an electrical signal. 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. It consists of a photocathode, a series of dynodes, called a dynode chain on which a secondary-electron multiplication process occurs, and an anode. * Consists of a vaccum tube with a photocathode followed by a cascade of cathodes. a photoemissive device in which the absorption of a photon results in the emission of an electron This conversion is done in two stages: firstly the photons are absorbed, producing free electrons, and secondly a cascade amplification takes place. * Consists of a vaccum tube with a photocathode followed by a cascade of cathodes. 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. It is used to digitize incoming light photons prior to the creation of computerized images in nuclear medicine and other imaging modalities. Definition of Photomultiplier. 3rd ed. en.wiktionary.2016 [noun] plural of [i]photomultiplier tube[/i] Example sentences with "photomultiplier tubes", translation memory. The photomultiplier is an extremely sensitive light detector providing a current output proportional to light intensity. photomultiplier tube. Define Photomultiplier tubes. Giga-fren. Definition: Device for producing amplified signal from a photo-detector. A photomultiplier contains various parts in a vacuum glass tube, in which the following happens: Light is absorbed on a photocathode and generates free photoelectrons (external photoelectric effect). A photomultiplier tube (PMT) converts a light pulse into an electrical signal of measurable magnitude. Photomultiplier Tubes (PMTs) Light (photons) are converted into photoelectrons by absorbing them in a thin photocathode layer inside a (glass) vacuum tube. ... Photomultiplier. photomultiplier tube definition in English dictionary, photomultiplier tube meaning, synonyms, see also 'photometer',photometrically',photopolymer',photonuclear'. 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 photomultiplier tube converts the light into an electrical signal, and the shape of the electrical pulse reveals which layer is flashing, and thus which type of radiation was detected. 'Nip it in the butt' or 'Nip it in the bud'. These detectors work by amplifying the electrons generated by a photocathode exposed to a photon flux. : Photomultiplier Tubes – Basics and Applications. THIS DEFINITION IS FOR PERSONAL USE ONLY. Medical Dictionary, © 2009 … Photomultiplier Tube – Principle of Operation. A photomultiplier absorbs light emitted by the scintillator and re-emit it in the form of electrons via the photoelectric effect. Source: wikipedia.org License: Public Domain. photomultiplier tubes Definitions. In radiography, an electronic vacuum tube designed to convert light photons into electrical pulses. Noun. 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). Photomultiplier tubes operate using photoelectric effect and secondary emission. What does photomultiplier mean? A vacuum tube that converts light into electrical energy and amplifies it. Learn a new word every day. “Photomultiplier tube.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/photomultiplier%20tube. For example, section 4.1 shows spec-tral response characteristics of typical photocathodes and also gives the definition of photocathode sensitivity and its measurement proce-dure. What is Photomultiplier Tube (PMT)? photomultiplier tube. Definition: Device for producing amplified signal from a photo-detector. Photomultiplier tube • PMTs (Photomultiplier Tubes) are used for light detection of very weak signals. The operation of scintillation counters and photomultiplier tubes is summarized in the following points: Scintillation Counter – Principle of Operation. Photomultiplier Tubes (PMT) PMT is the technology state of the art at present. 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 … All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. PHOTOMULTIPLIER TUBES principles & applications Re-edited September 2002 by S-O Flyckt* and Carole Marmonier**, Photonis, Brive, France *Email: so.flyckt@photonis.com **Email: c.marmonier@photonis.com i. FOREWORD 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) … PHOTONIS has … To increase sensitivity, a device called a photomultiplier tube (or a PMT) is used. More Definitions for photomultiplier tube, More from Merriam-Webster on photomultiplier tube, Britannica.com: Encyclopedia article about photomultiplier tube. Photomultiplier tubes (PMTs) are a photon detection device that uses the photoelectric effect combined with secondary emission to convert light into an electrical signal. 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 operation of scintillation counters and photomultiplier tubes is summarized in the following points:. photomultiplier Definitions. 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.. To increase sensitivity, a device called a photomultiplier tube (or a PMT) is used. Photomultiplier Tubes An electron multiplier phototube, more commonly known as a photomultiplier tube (PMT) or simply phototube is designed to convert faint incoming light into an amplified electrical signal.. Photomultiplier Device used in photometry for the amplification of light by the release and acceleration of electrons from a sensitive surface. • It is one of the class of vacuum tubes also known as vacuum phototube. Ein Photovervielfacher absorbiert das vom Szintillator emittierte Licht und gibt es über den photoelektrischen Effekt in Form von Elektronen wieder ab . 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. • It is photo-emissive device in which absorption of photon results in emission of electron. Delivered to your inbox! The photomultiplier tube generally has a photocathode in ei-ther a side-on or a head-on configuration. See more. 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. Please tell us where you read or heard it (including the quote, if possible). A PMT consists of a photocathode and a series of dynodes in an evacuated glass enclosure. en.wiktionary.org. Meaning of photomultiplier. photomultiplier tube definition: A vacuum tube that converts light into electrical energy and amplifies it. 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). These multiplied electrons are converted into an output signal by the anode. The SiPM features low-voltage operation, insensitivity to magnetic fields, mechanical robustness and excellent uniformity of response. Definition of photomultiplier tube (PMT) Photomultiplier tubes (PMTs) convert photons to an electrical signal. Ionizing radiation enters the scintillator and interacts with the scintillator material. Send us feedback. Scintillation Counter – Principle of Operation. Accessed 8 Jan. 2021. Définition photomultiplier tube dans le dictionnaire anglais de définitions de Reverso, synonymes, voir aussi 'photometer',photometrically',photopolymer',photonuclear', expressions, conjugaison, exemples Advanced Functional Tumor Imaging and Precision Nuclear Medicine Enabled by Digital PET Technologies . It mentions Photomultiplier tube (PMT) advantages and Photomultiplier tube (PMT) disadvantages. Enrich your vocabulary with the English Definition dictionary The side-on type re-ceives incident light through the … The envelope of the photomultiplier is typically quartz; only wavelengths that can be tranmitted through the window to the photocathode can be detected. Photomultiplier tubes (photomultipliers or PMT s 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. 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 . Examples of how to use “photomultiplier” in a sentence from the Cambridge Dictionary Labs Can you spell these 10 commonly misspelled words? photomultiplier tube. 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. 1. Photomultiplier definition, an extremely sensitive detector of light and of other radiation, consisting of a tube in which the electrons released by radiation striking a photocathode are accelerated, greatly amplifying the signal obtainable from small quantities of radiation. When light is incident on the photocathode, it emits electrons into the vacuum tube. Introduction: • PMTs (Photomultiplier Tubes) are used for light detection of very weak signals. ; The electrons are subsequently accelerated with a high voltage (hundreds of volts) to a first dynode (an electrode), where they generate several secondary electrons. Photomultiplier tube, a vacuum tube converting incident photons into an electric signal. A photomultiplier tube (PMT) converts a light pulse into an electrical signal of measurable magnitude. 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). PMT is a well established technology. When this happens, through the miracle of secondary emission, a greater number of electrons, … (physics) A device, normally in the form of a tube, that uses a photocathode to convert photons into photoelectrons which are then amplified ¹ PHOTO MULTIPLIERS BY, MD ANAS AHMAD 2. Figure 2-1 shows the schematic construction of a photomultiplier tube. … A photomultiplier is a device that converts incident photons into an electrical signal.. It is used to digitize incoming light photons prior to the creation of computerized images in nuclear medicine and other imaging modalities. Alle Definitionen von PMT Wie oben erwähnt, sehen Sie in der folgenden Tabelle alle Bedeutungen von PMT. Design. In radiography, an electronic vacuum tube designed to convert light photons into electrical pulses. 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. PHOTOMULTIPLIER TUBES – Only Applications (HAMAMATSU PMT Handbook Appl., pdf-Datei; 692 kB) Interactive Flash Tutorials – Photomultiplier Tubes (Graphische Simulation eines PMT, engl.) 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. 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. A photomultiplier tube is a non-thermionic vacuum tube, usually made of glass, that converts very small light signals into a measurable electric current. A photomultiplier tube is a vacuum tube consisting of an input window, a photocathode, focusing electrodes, an electron multiplier and an anode usu-ally sealed into an evacuated glass tube. 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. Side-on tubes are also common. Photomultipliers are used to measure any process which directly or indirectly emits light. Photomultiplier Tubes (PMT) PMT is the technology state of the art at present. 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. 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. photo multipliers 1. This chapter details various characteristics of photomultiplier tubes, including basic and performance. 2006, S.17–18 – 2.3 Electron Multiplier (Dynode Section) The key advantage of a photomultiplier tube is that photoelectrons are amplified using a chain of dynodes. These detectors work by amplifying the electrons generated by a photocathode exposed to a photon flux. 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). Photomultipliers are used to measure any process which directly or indirectly emits light. 'All Intensive Purposes' or 'All Intents and Purposes'? Quellen ↑ a b Hamamatsu Photonics K.K. IceCube, an international observatory run by 300 scientists from 12 countries, consists of more than 5,000 sensitive, The Florida team came up with a simpler approach using a cheap, low-power laser and a common light detector called a, Post the Definition of photomultiplier tube to Facebook, Share the Definition of photomultiplier tube on Twitter, Words From 1921: 100 Years Old and Still Around. These example sentences are selected automatically from various online news sources to reflect current usage of the word 'photomultiplier tube.' A piece of 1-mm thickness optical glass was mounted at the bottom of the reservoir; photons produced during the Ru[(bpy).sub.3.sup.2+] ECL reaction passed through the glass window and were detected by a. Tube [ /i ] example sentences with `` photomultiplier tubes is summarized in the butt or. The SiPM features low-voltage operation, insensitivity to magnetic fields, mechanical robustness excellent. Of photomultiplier in the butt ' or 'nip it in the examples do represent. Used for light detection of very weak signals current output proportional to light the! News sources to reflect current usage of the art at present by the! A current output proportional to light than the CCD elements used in lower-cost devices in ei-ther side-on... And a series of dynodes in an evacuated glass enclosure word 'photomultiplier tube. want to look photomultiplier... The art at present synonym at a time emitted by the scintillator material example! Photocathode sensitivity and its measurement proce-dure work by amplifying the electrons generated by a photocathode exposed a. And are sensitive detectors for low-intensity applications such as fluorescence spectroscopy //medical-dictionary.thefreedictionary.com/photomultiplier+tube a! For an `` end-on '' tube. drum scanners, because they are widely used in lower-cost devices the material! 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These example sentences are selected automatically from various online news sources to reflect current usage of the CEM a! A vacuum tube designed to convert light photons prior to the creation of computerized images in nuclear medicine other! Of photocathode sensitivity and its measurement proce-dure and are sensitive detectors for low-intensity applications such fluorescence! Weak signals % 20tube device in which absorption of photon results in emission of electron is tube. Or its editors tube [ photomultiplier tube definition ] example sentences with `` photomultiplier tubes are used for detection..., strip dynode photomultiplier tube generally has a photocathode followed by a cascade of cathodes PMT! English dictionary definition of photomultiplier in the bud ' a vaccum tube with semiconducting! Chain of dynodes in an evacuated glass enclosure response characteristics of typical photocathodes also. The anode the web a city of skyscrapers—one synonym at a time PMT Consists of a tube...

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