electron gun


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electron gun

n.
An electrode, especially in a cathode-ray tube, that produces a beam of accelerated electrons.

electron gun

n
(Electronics) a heated cathode with an associated system of electrodes and coils for producing and focusing a beam of electrons, used esp in cathode-ray tubes

elec′tron gun`


n.
a device consisting of a cathode-ray tube and a surrounding electrostatic or electromagnetic apparatus, which emits, focuses, and accelerates a stream of electrons (elec′tron beam`).
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.electron gun - the electrode that is the source of electrons in a cathode-ray tube or electron microscope; consists of a cathode that emits a stream of electrons and the electrostatic or electromagnetic apparatus that focuses it
cathode-ray tube, CRT - a vacuum tube in which a hot cathode emits a beam of electrons that pass through a high voltage anode and are focused or deflected before hitting a phosphorescent screen
electrode - a conductor used to make electrical contact with some part of a circuit
electron microscope - a microscope that is similar in purpose to a light microscope but achieves much greater resolving power by using a parallel beam of electrons to illuminate the object instead of a beam of light
Translations

electron gun

nproiettore m elettronico
References in periodicals archive ?
At present, there are few reports on the research and application of automatic replacement devices for electron gun vulnerable parts in the nuclear environment.
In a vacuum chamber of the installation the special technological equipment for electronic data processing was placed; there are quartz infrared preheating and final cooling oven, electron gun with Pierce optics to form the strip electron stream, the mechanism of movement of the optical elements.
Maijer's lab will also be investigating the possibility of switching to using a plasma arc instead of an electron gun. That system can run in a chamber filled with noble gas instead of a vacuum; the extra pressure helps to prevent evaporation.
It also has a new field emission electron gun with a vacuum 100X greater than conventional field emission guns (3 x [10.sup.-10] Pa).
The main feature is a standard Teltron electron beam tube comprising an electron gun which emits a narrow, focussed ribbon of electrons within an evacuated glass bulb.
An electron gun option is available for analysis of insulating samples.
The E-sail consists of a number of long and thin conductive wires or tethers, which are kept at a positive potential with the help of an onboard electron gun. The concept is promising because of a large effective sail area with a relatively low mass providing a high and constant level of thrust.
The layers were deposited in high vacuum condition, using an electron gun evaporation method with the deposition rate of 0.9A [degrees]/s.
At one end of the machine sits an electron gun that shoots electrons into a 3m-long copper tube known as the waveguide.
Figure 8(a) shows that the electromagnetic wave enters the RF channel and travels toward the beam tunnel while the amplitude toward the electron emission side is very low due to the design of the coupler which consists of an RF choke at the electron gun side.
Using an energy-dispersive x-ray detector, an electron gun, and a computer-controllable sample stage, a multiple-energy hologram of the atomic arrangement around the Ti atom in SrTiO3 was obtained and 3D atomic images of the elements strontium (Sr), titanium (Ti), and oxygen in SrTiO3 were clearly visualized.

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