hot cathode
61Albert Hull — Infobox Scientist name = Albert Wallace Hull box width = caption = Albert Wallace Hull birth date = birth date|1880|4|19 birth place = Southington, Connecticut death date = death date and age|1966|1|22|1880|4|19 death place = residence = United… …
62Wehnelt cylinder — A Wehnelt cylinder is an electrode in the electron gun assembly of some thermionic devices, used for focusing and control of the electron beam. It is named after Arthur Rudolph Berthold Wehnelt, a German physicist, who invented it during the… …
63Medical radiography — Diagnostics ICD 10 PCS B?0, B?1, B?2 ICD 9 CM 87 …
64Noise-figure meter — A noise figure meter is an instrument for measuring the noise figure of an amplifier, mixer, or similar device. An example instrument is the 1983 era Agilent 8970A. Contents 1 Measurement methods 2 Noise source 2.1 Thermal noise …
65Photomultiplier — tubes (photomultipliers or PMTs for short), members of the class of vacuum tubes, and more specifically phototubes, are extremely sensitive detectors of light in the ultraviolet, visible, and near infrared ranges of the electromagnetic spectrum.… …
66Linear particle accelerator — A linear particle accelerator (also called a linac) is an electrical device for the acceleration of subatomic particles. This sort of particle accelerator has many applications, from the generation of X rays in a hospital environment, to an… …
67unipotential — /yooh neuh peuh ten sheuhl/, adj. 1. Elect., Electronics. having uniform electric potential throughout, as a hot cathode (unipotential cathode) indirectly heated by a separate heater circuit so that there is no lateral change of voltage across… …
68unipotential — |yünə+ adjective Etymology: uni + potential 1. : unipotent 2. : having the same electrical potential as something else a unipotential lens * * * /yooh neuh peuh ten sheuhl/, adj. 1. Elect., Electronics. having uniform electric potential… …
69Work function — In solid state physics, the work function is the minimum energy (usually measured in electron volts) needed to remove an electron from a solid to a point immediately outside the solid surface (or energy needed to move an electron from the Fermi… …
70Barium oxide — Chembox new Name = Barium oxide OtherNames = Barium monoxide; barium protoxide; calcined baryta Section1 = Chembox Identifiers CASNo = 1304 28 5 Section2 = Chembox Properties Formula = BaO MolarMass = 153.3 g/mol Appearance = white solid Density …
