AI & ChatGPT searches , social queries for THERMIONIC EMISSION
Search references for THERMIONIC EMISSION. Phrases containing THERMIONIC EMISSION
See searches and references containing THERMIONIC EMISSION!
Search references for THERMIONIC EMISSION. Phrases containing THERMIONIC EMISSION
See searches and references containing THERMIONIC EMISSION!THERMIONIC EMISSION
Thermally induced flow of charge carriers from a surface
Thermionic emission is the liberation of charged particles from a hot electrode whose thermal energy gives some particles enough kinetic energy to escape
Thermionic_emission
Type of electrode
tubes, a hot cathode or thermionic cathode is a cathode electrode which is heated to make it emit electrons due to thermionic emission. This is in contrast
Hot_cathode
Device that controls current between electrodes
external connection pins. The type known as a thermionic tube or thermionic valve utilizes thermionic emission of electrons from a hot cathode for fundamental
Vacuum_tube
Phenomenon in condensed matter physics
or field enhanced thermionic emission is a phenomenon in condensed matter physics named after Walter H. Schottky. In electron emission devices, especially
Schottky_effect
Type of energy
in the vacuum are excluded in defining the work function. Thermionic emission In thermionic electron guns, the work function and temperature of the hot
Work_function
Type of electron gun
a tip radius of about 100 nm, or of the Schottky type, in which thermionic emission is enhanced by barrier lowering in the presence of a high electric
Field_emission_gun
Long conducting wires which can act as electrical motors or generators
electron gun is large enough. In this case, the emission current is regulated by the thermionic emission process, given by the Richardson Dushman equation
Electrodynamic_tether
Electrical breakdown of a gas that results in an ongoing electrical discharge
discharge is initiated either by thermionic emission or by field emission. After initiation, the arc relies on thermionic emission of electrons from the electrodes
Electric_arc
Lamp using fluorescence to produce light
but are not hot enough for significant thermionic emission. Because cold cathode lamps have no thermionic emission coating to wear out, they can have much
Fluorescent_lamp
Emission of electrons induced by an electrostatic field
to describe field emission from other materials.[citation needed] The related phenomena of surface photoeffect, thermionic emission (or Richardson–Dushman
Field_electron_emission
German physicist and electrical engineer (1886-1976)
engineer who played a major early role in developing the theory of thermionic emission, invented the screen-grid vacuum tube in 1915, co-invented the ribbon
Walter_Schottky
Power generation device
electronic viewpoint, thermionic energy conversion is the direct production of electric power from heat by thermionic electron emission. From a thermodynamic
Thermionic_converter
Flow of electric charge
emission or thermionic emission. Thermionic emission occurs when the thermal energy exceeds the metal's work function, while field electron emission occurs
Electric_current
Potential energy barrier in metal–semiconductor junctions
flowing through the barrier is essentially governed by the laws of thermionic emission, combined with the fact that the Schottky barrier is fixed relative
Schottky_barrier
Frequencies of light emitted by atoms or chemical compounds
The Diode equation includes the emission coefficient (which is not related to the one discussed here) Thermionic emission Incorporated, SynLube. "Spectroscopy
Emission_spectrum
Electrode where reduction takes place
the surface, an effect called thermionic emission. This technique is used in most vacuum tubes. Field electron emission: A strong electric field can be
Cathode
Ejection of an electron from the surface of matter, or atomic nucleus
due to the: Schottky effect or field enhanced thermionic emission Field electron emission, emission of electrons induced by an electrostatic field An
Electron_emission
Topics referred to by the same term
experiment Emission theory (vision), the proposal that visual perception is accomplished by rays of light emitted by the eyes Thermionic emission, the flow
Emission
Two-terminal electronic component
temperature of the cathode causes it to emit electrons into the vacuum by thermionic emission. In most receiving tubes the cathode is coated with oxides of alkaline-earth
Diode
Topics referred to by the same term
Thermal emission may refer to: Thermionic emission, the liberation of charged particles from an electrode due to thermal energy Thermal radiation, electromagnetic
Thermal_emission
Imaging and diffraction using electrons that pass through samples
kV) and emits electrons either by thermionic or field electron emission into the vacuum. In the case of a thermionic source, the electron source is mounted
Transmission electron microscopy
Transmission_electron_microscopy
Type of electrode and part of cold cathode fluorescent lamp
considered "cold" if it emits more electrons than can be supplied by thermionic emission alone. It is used in gas-discharge lamps, such as neon lamps, discharge
Cold_cathode
Beam of electrons observed in vacuum tubes
its surface; these were the cathode rays. Modern vacuum tubes use thermionic emission, in which the cathode is made of a thin wire filament which is heated
Cathode_ray
Electronic numeric display device
resembles a vacuum tube in appearance, its operation does not depend on thermionic emission of electrons from a hot cathode. It is hence a cold cathode tube
Nixie_tube
British physicist (1879–1959)
physicist who received the 1928 Nobel Prize in Physics for his work on thermionic emission and for the discovery of Richardson's law. Owen Willans Richardson
Owen_Richardson
French physicist (1820–1891)
cover certain apparent exceptions. In 1853, Becquerel discovered thermionic emission. In 1867 and 1868 Becquerel published La lumière, ses causes et ses
Edmond_Becquerel
Concept in quantum mechanics
thermionic emission or use thin barriers and transport carriers via tunneling. Carrier lifetime for escape is determined by tunneling and thermionic emission
Quantum_well
Electrical component producing a narrow electron beam
electrostatic thermionic electron gun is formed from several parts: a hot cathode, which is heated to create a stream of electrons via thermionic emission; electrodes
Electron_gun
German–American theoretical physicist (1899–1985)
mechanics to solid-state problems, such as thermionic emission, work function of metals, field electron emission, rectification in metal-semiconductor contacts
Lothar_Nordheim
Quantum mechanical phenomenon
Nordheim, assisted by Ralph Fowler, published a paper that discussed thermionic emission and reflection of electrons from metals. He assumed a surface potential
Quantum_tunnelling
Thermal effect of field emission
surface cooling and heating mechanism that occurs during field and thermionic electron emission. The effect is named after physicist Wayne B. Nottingham who
Nottingham_effect
Electric charge treated as continuously distributed in space
surround the metal object in a cloud of free electrons. This is called thermionic emission. The resulting cloud is negatively charged, and can be attracted
Space_charge
Type of vacuum tube; early radio detector
The Fleming valve, also called the Fleming oscillation valve, is a thermionic valve or vacuum tube invented in 1904 by English physicist John Ambrose Fleming
Fleming_valve
Type of electric arc
electrons either through heating (thermionic emission) or in an electric field that is sufficient to cause field electron emission. Once initiated, a vacuum arc
Vacuum_arc
Models for electric current flow
ISSN 1530-6984. PMID 22545580. Murphy, E. L.; Good, R. H. (1956). "Thermionic Emission, Field Emission, and the Transition Region". Physical Review. 102 (6): 1464–1473
Charge_transport_mechanisms
Direct conversion of temperature differences to electric voltage and vice versa
after heating/cooling, an effect distinct from thermoelectricity Thermionic emission – the liberation of charged particles from a hot electrode Thermogalvanic
Thermoelectric_effect
gauge which is much more stable and independent of gas chemistry. Thermionic emission generates electrons, which collide with gas atoms and generate positive
Pressure_measurement
Electronic component that exploits the electronic properties of semiconductor materials
rather than as free electrons across a vacuum (typically liberated by thermionic emission) or as free electrons and ions through an ionized gas. Semiconductor
Semiconductor_device
Type of discharge tube
electrons, a heated filament or hot cathode which releases electrons by thermionic emission. The ionization method of creating cathode rays used in Crookes tubes
Crookes_tube
Free-moving particle which carries an electric charge
cloud is generated by a heated metal cathode, by a process called thermionic emission. When an electric field is applied strongly enough to draw the electrons
Charge_carrier
American engineer
" but when Edison patented the electric light bulb in 1883 this thermionic emission became known as the "Edison Effect," and was patented on November
William_Joseph_Hammer
Fluorescent lamp starter
tube heats them up and they emit electrons into the tube gas by thermionic emission. In the starter, the touching contacts short out the voltage sustaining
Glow_switch_starter
American experimental physicist
was an American experimental physicist, specializing in "thermionic and photoelectric emission of electrons from crystalline metals." A. B. Cardwell graduated
Alvin_B._Cardwell
Stream of charged, or less frequently neutral particles
common surroundings. This can be accomplished by processes such as thermionic emission or arc discharge. The following devices are commonly used as sources
Particle_beam
Single-grid amplifying vacuum tube having three active electrodes
A triode is an electronic amplifying vacuum tube (or thermionic valve in British English) consisting of three electrodes inside an evacuated glass envelope:
Triode
Thought experiment of 1867
spectrometry Photoelectric effect Quantum tunnelling Schrödinger's cat Thermionic emission Vortex tube Cargill Gilston Knott (1911). "Quote from undated letter
Maxwell's_demon
Peak voltage across an X-ray tube
generation, surface electrons are released from a heated cathode by thermionic emission. The applied voltage (kV) accelerates these electrons toward an anode
Peak_kilovoltage
the filament to release or burn off electrons. This is known as thermionic emission. The electrons are then compressed or focused by the focusing cup
Line_focus_principle
Phenomena involving electrical occurrences
large underground areas at or near the surface of the Earth. Thermionic emission — the emission of electrons from a heated electrode, usually the cathode
List_of_electrical_phenomena
Plasma formed by passage of current through gas
an electron by secondary emission. In an arc discharge, electrons leave the cathode by thermionic emission and field emission, and the gas is ionized by
Glow_discharge
Electric light bulb with a resistively heated wire filament
Study of the problem of bulb blackening led to the discovery of thermionic emission, the invention of the vacuum tube, and evaporation deposition used
Incandescent_light_bulb
Vacuum tube that converts electrical input power into X-rays
in 1913. The Coolidge tube, also called a hot cathode tube, uses thermionic emission, where a tungsten cathode is heated to a sufficiently high temperature
X-ray_tube
Electrical device that converts AC to DC
current, and a metal plate anode. The filament emitted electrons by thermionic emission (the Edison effect), discovered by Thomas Edison in 1884, and a positive
Rectifier
Gas discharge lamp that produces intense white light
geometry. The cathode is kept small to reach high temperatures for thermionic emission, the anode being larger to dissipate the heat generated as incoming
Xenon_arc_lamp
When a particle's interactions with a material cause it to emit new particles
invention of magnetic-core memory. Secondary emission can be undesirable such as in the tetrode thermionic valve (tube). In this instance the positively
Secondary_emission
Chinese-American physicist
Temperature of a Triboelectric Nanogenerator by Quenching Down Electron Thermionic Emission in Contact-Electrification". Advanced Materials. 30 (38) 1803968
Zhong_Lin_Wang
Electrical potential that is large enough to cause damage or injury
them to become incandescent, so that they emit electrons (through thermionic emission). Even a small 9 V battery can spark noticeably by this mechanism
High_voltage
Quantity in solid state thermodynamics
populated with a significant number of electrons (this is the basis of thermionic emission). Kittel, Charles (1996). Introduction to Solid State Physics (7th ed
Fermi_level
American physicist (1902–1987)
lecture by Arnold Sommerfeld. Some of their subsequent experiments on thermionic emission provided experimental validation for the Sommerfeld theory. They
Walter_Brattain
Electronic component
applied, the diode junction breaks down due to a combination of thermionic emission and electron tunneling, resulting in a large current flow. The result
Varistor
characterized by a lower voltage than a glow discharge, and relies on thermionic emission of electrons from the electrodes supporting the arc. The electric
Plasma deep drilling technology
Plasma_deep_drilling_technology
Artificial light sources powered by ionized gas electric discharge
in the lamp. The heat knocks electrons out of the electrodes by thermionic emission, which helps maintain the arc. In many types the electrodes consist
Gas-discharge_lamp
Type of electron microscopy
electron emission can be heat (thermionic emission), light (photoelectron emission), ions, or neutral particles, but typically excludes field emission and
Photoemission electron microscopy
Photoemission_electron_microscopy
Equipment in thermodynamics
Peltier-Seebeck effect. The other relies on vacuum tubes and the principles of thermionic emission. a heat engine working backwards as a refrigerator, such as a Peltier
Thermal_diode
Electrode in the electron gun assembly of some thermionic devices
simply Wehnelt) is an electrode in the electron gun assembly of some thermionic devices, used for focusing and control of the electron beam. It is named
Wehnelt_cylinder
Transmission of information electromagnetically
Broadcasting Corporation beginning on 30 September 1929. Vacuum tubes use thermionic emission of electrons from a heated cathode for a number of fundamental electronic
Telecommunications
Electricity in planetary atmospheres
using early cameras. J. Elster and H. F. Geitel, who also worked on thermionic emission, proposed a theory to explain thunderstorms' electrical structure
Atmospheric_electricity
System that converts heat or thermal energy to mechanical work
converter Thermoelectric (Peltier–Seebeck effect) Thermogalvanic cell Thermionic emission Thermotunnel cooling Thermo-magnetic motor (Tesla) A domestic refrigerator
Heat_engine
Market town in West Yorkshire, England
physicist, won the Nobel Prize in Physics in 1928 for his work of thermionic emission. Sayeeda Warsi, Baroness Warsi of Dewsbury (born 1971), Conservative
Dewsbury
Fast, high sensitivity, low noise electronic photon detector
the materials have low work function and are therefore prone to thermionic emission, causing noise and dark current, especially the materials sensitive
Photomultiplier_tube
Device that generates sparks in internal combustion engines
because of the same physical laws that increase emissions of vapor from hot surfaces (see thermionic emission). In addition, electrons are emitted where the
Spark_plug
initiation mechanisms. Contact arcs are either a Thermionic-Emission-Initiated-Arc ("T-Arc") or a Field-Emissions-Initiated-Arc ("F-Arc"), and are maintained
Arc_suppression
Vacuum tube with four active electrodes
filament heats the cathode, which causes it to emit electrons by thermionic emission. A positive voltage is applied between the plate and cathode, causing
Tetrode
Transistor type used in the flat-panel display industry
poly-Si TFT models for device simulation: In-plane trap model and thermionic emission model". SID Conference Record of the International Display Research
Low-temperature polycrystalline silicon
Low-temperature_polycrystalline_silicon
gun, used to generate electrons by way of thermionic or field emission from a source tip. In thermionic emission, electrons escape a source tip (usually
Low-energy electron microscopy
Low-energy_electron_microscopy
American chemist and physicist (1881–1957)
gas environments, he began to study the emission of charged particles from hot filaments (thermionic emission). He was one of the first scientists to
Irving_Langmuir
Form of large-area field electron source
tubes. FEAs offer a number of potential advantages over conventional thermionic cathodes, including low power consumption, instantaneous switching, and
Field_emitter_array
Ionization technique
molecular ion. In an EI ion source, electrons are produced through thermionic emission by heating a wire filament that has electric current running through
Electron_ionization
Type of electrode used in vacuum tubes
secondary emission. Anode https://web.archive.org/web/20101007201649/http://pentalabs.com/tubeworks.html – The history of vacuum tubes The Thermionic Detector
Plate_electrode
Type of electrical junction
November 23, 1942. In Bethe's theory, the current is limited by thermionic emission of electrons over the metal–semiconductor potential barrier. Thus
Metal–semiconductor_junction
Form of physical vapor deposition
hundreds of kilowatts. Electron beams can be generated by thermionic emission, field electron emission or the anodic arc method. The generated electron beam
Electron-beam physical vapor deposition
Electron-beam_physical_vapor_deposition
Field-effect transistor device
poly-Si TFT models for device simulation: In-plane trap model and thermionic emission model". SID Conference Record of the International Display Research
Thin-film_transistor
Process in metallurgy
process and by the late 1950s many systems using motor generators and thermionic emission triode oscillators were in regular use in a vast array of industries
Induction_hardening
Analytical technique based on determining mass to charge ratio of ions
running electric current through it, producing energetic electrons by thermionic emission. The electrons are then accelerated towards an anode. The voltage
Mass_spectrometry
force: the van der Waals force. 1873: Frederick Guthrie discovers thermionic emission. 1873: Willoughby Smith discovers photoconductivity. 1875: William
Timeline of scientific discoveries
Timeline_of_scientific_discoveries
British astrophysicist (1882–1944)
Wrangler. After receiving his M.A. in 1905, he began research on thermionic emission in the Cavendish Laboratory. This did not go well, and meanwhile
Arthur_Eddington
Austrian entrepreneur, physicist, and inventor (1878–1913)
Richard Leiser, he studied X-rays, electric discharge in gases and thermionic emission. In 1903, Lieben purchased a telephone equipment factory in Olomouc;
Robert_von_Lieben
List of definitions of terms and concepts used in electrical engineering and electronics
always a vacuum tube, with four internal active electrodes. thermionic emission Emission of electrons from a hot surface; the Edison Effect was an early
Glossary of electrical and electronics engineering
Glossary_of_electrical_and_electronics_engineering
American physicist and university president (1887–1954)
research on the photoelectric emission of electrons, contributing experimental evidence for Richardson's law of thermionic emission. Working with Richardson
Karl_Compton
Experimental transistor
modulating quantum tunneling through a barrier instead of modulating thermionic emission over a barrier as in traditional MOSFETs. Because of this, TFETs
Tunnel field-effect transistor
Tunnel_field-effect_transistor
Day of the year
creating the modern central boulevards. 1880 – Thomas Edison observes thermionic emission. 1913 – The 13th Dalai Lama proclaims Tibetan independence following
February_13
Doppler radar – Christian Doppler Draisine – Karl Drais Edison effect (Thermionic emission) – Thomas Edison Edison screw – Thomas Edison Ehrlich's reagent –
List of inventions named after people
List_of_inventions_named_after_people
Method of depositing thin films onto a substrate
generated by a DC discharge in an electron-rich environment, obtained by thermionic emission from heated filaments. The voltages required by the arc discharge
Plasma-enhanced chemical vapor deposition
Plasma-enhanced_chemical_vapor_deposition
Class of chemical compounds
cathodes because of its low work function which gives it a high rate of thermionic emission of electrons; YB66 crystals, grown by an indirect-heating floating
Boride
Large-scale synchrotron facility in Australia
the synchrotron light are first produced at the electron gun, by thermionic emission from a heated metal cathode. The emitted electrons are then accelerated
Australian_Synchrotron
equilibrium, but the converse is not always true. thermal radiation thermionic emission thermodynamic equilibrium thermodynamic free energy thermodynamics
Glossary_of_physics
German physicist
University of Technology. Photoelectric effect Photomultiplier tube Thermionic emission Pais, Abraham (2002). Inward bound: of matter and forces in the physical
Hans_Geitel
Device that creates charged atoms and molecules (ions)
ions can also be generated with an ion gun which typically uses the thermionic emission of electrons to ionize a substance in its gaseous state. Such instruments
Ion_source
flat disk records were widely available. Thomas Edison discovers thermionic emission. This effect forms the basis for the vacuum tube and the cathode
Timeline of electrical and electronics engineering
Timeline_of_electrical_and_electronics_engineering
Devices generating electricity from radioisotope decay
Plutonium 238 radioisotope as its fuel. A thermionic converter (TEC) consists of a hot electrode, which thermionically emits electrons over a space-charge barrier
Atomic_battery
THERMIONIC EMISSION
THERMIONIC EMISSION
THERMIONIC EMISSION
THERMIONIC EMISSION
Boy/Male
Native American
pitched trees.
Girl/Female
Greek
Divine gift.
Boy/Male
Tamil
By the ash tree, An adventurer
Girl/Female
Indian
Pleasing Smile; Beautiful Smile
Girl/Female
Tamil
Well born, Of a good family
Boy/Male
American, Australian, British, Chinese, Danish, English, French, Hebrew, Irish
Who is Like God; Form of Michael; Diminutive Form of Michael Like God
Girl/Female
English
Rhyming.
Girl/Female
Teutonic
Oath.
Boy/Male
Australian, Dutch, German, Latin, Swedish
Conquering
Male
Scottish
Scottish Gaelic name derived from the phrase giolla ChrÃost, GILCHRIST means "servant of Christ."
THERMIONIC EMISSION
THERMIONIC EMISSION
THERMIONIC EMISSION
THERMIONIC EMISSION
THERMIONIC EMISSION
n.
Abnormally frequent involuntary emission of the semen without copulation.
n.
The act of radiating, or the state of being radiated; emission and diffusion of rays of light; beamy brightness.
n.
Emission or reflection of light.
n.
The act of sending or throwing out; the act of sending forth or putting into circulation; issue; as, the emission of light from the sun; the emission of heat from a fire; the emission of bank notes.
n.
The act of immitting, or of sending or thrusting in; injection; -- the correlative of emission.
n.
The emission of sperm, or semen.
v. t.
To emit foam; to froth; -- said of the emission of yeast from beer in course of fermentation.
n.
The act of irradiating; emission of rays of light.
n.
The emission of semen, or sperm, at other times than in sexual intercourse.
n.
A burst or emission of many things at once; as, a volley of words.
a.
Alt. of Thermotical
n.
A darting point; a sudden emission.
v. i.
To show mirth, satisfaction, or derision, by peculiar movement of the muscles of the face, particularly of the mouth, causing a lighting up of the face and eyes, and usually accompanied by the emission of explosive or chuckling sounds from the chest and throat; to indulge in laughter.
a.
Pertaining to, or employed in, the expiration or emission of air from the lungs; as, the expiratory muscles.
n.
A sudden and single emission of breath from the mouth; hence, any sudden or short blast of wind; a slight gust; a whiff.
n.
The act of trajecting; a throwing or casting through or across; also, emission.
n.
A sending out; emission.
v. t.
A sudden and violent issue of a fluid from an inclosed plase; an emission of a liquid in a large quantity, and with force; the fluid thus emitted; a rapid outpouring of anything; as, a gush of song from a bird.
n.
Emission; escape; passage to notice or expression; publication; utterance.
n.
That which is sent out, issued, or put in circulation at one time; issue; as, the emission was mostly blood.