FIELD EMITTER Meaning and
Definition
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A field emitter refers to a device or structure capable of emitting electrons into a vacuum or a low-pressure gas environment. It harnesses the principle of field emission, which involves a high electric field causing electrons to be emitted from a surface.
In more technical terms, a field emitter is typically a narrow metal tip, known as an emitter, that possesses a small radius of curvature. It is designed to generate an intense electric field around its surface due to the high voltage applied to it. This configuration creates a strong electric field gradient, enabling electrons to overcome the energy barrier and be released.
Field emitters find applications in various fields like electronics, particle accelerators, vacuum microelectronics, and display technologies. They are crucial components in vacuum tubes, microwave amplifiers, and electron microscopes that require the generation and control of an electron beam. Field emission displays (FEDs), an alternative to liquid crystal displays (LCDs) and organic light-emitting diodes (OLEDs), also rely on field emitter arrays to produce an image by modulating the emission of electrons.
Field emitters offer advantages such as high brightness, compactness, fast response time, and potentially low power consumption. However, they can be susceptible to degradation over time due to factors like surface contamination, electric field enhancement, or high-temperature environments. Efforts are being made to improve the performance of field emitters and ensure their long-term stability for a wide range of applications.
Common Misspellings for FIELD EMITTER
- dield emitter
- cield emitter
- vield emitter
- gield emitter
- tield emitter
- rield emitter
- fueld emitter
- fjeld emitter
- fkeld emitter
- foeld emitter
- f9eld emitter
- f8eld emitter
- fiwld emitter
- fisld emitter
- fidld emitter
- firld emitter
- fi4ld emitter
- fi3ld emitter
- fiekd emitter
- fiepd emitter
Etymology of FIELD EMITTER
The word "field emitter" is composed of two parts: "field" and "emitter".
1. Field: The term "field" originated from the Old English word "feld", which meant "open land" or "plain". Over time, the meaning expanded to refer to a specific area or domain. In the context of physics and electronics, "field" refers to the region in which a force, such as an electric or magnetic force, can be felt or exerted.
2. Emitter: The term "emitter" comes from the Latin word "emittere", which means "to send forth" or "to discharge". It refers to a device or component that emits or releases something, typically referring to the release of particles or radiation.
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