noise emission
11Atmospheric noise — is radio noise caused by natural atmospheric processes, primarily lightning discharges in thunderstorms.Atmospheric noise is mainly caused by cloud to ground flashes as the current is much stronger than for cloud to cloud flashes. On a worldwide… …
12Secondary emission — is a phenomenon where additional electrons, called secondary electrons, are emitted from the surface of a material when an incident particle (often, charged particle such as electron or ion) impacts the material with sufficient energy. The number …
13Thermal Emission Imaging System — The Thermal Emission Imaging System (THEMIS) is a camera on board the 2001 Mars Odyssey orbiter. It images Mars in the visible and infrared parts of the electromagnetic spectrum in order to determine the thermal properties of the surface and to… …
14Field emission gun — A field emission gun is a type of electron gun in which the emitter tip is held at several kilovolts negative potential relative to a nearby electrode, so that there is sufficient potential gradient at its surface to cause field emission of… …
15shot noise — noun : a sputtering or popping produced (as in a radio) by shot effect * * * Electronics. See under shot effect. [1975 80] * * * shot noise noun (electronics) Inherent noise resulting from variations in the current output of an electronic device… …
16Self-Amplified Stimulated-Emission — Self Amplified Spontaneous (or Stimulated) Emission (SASE) is a process within a Free electron laser (FEL) by which a laser beam is created by the high energy electron beam. The lasing starts up from the random microbunching (i.e., shot noise) on …
17Single photon emission computed tomography — (SPECT, or less commonly, SPET) is a nuclear medicine tomographic imaging technique using gamma rays. It is very similar to conventional nuclear medicine planar imaging using a gamma camera. However, it is able to provide true 3D information.… …
18radio noise — noun static at radio wavelengths (Freq. 2) • Hypernyms: ↑static, ↑atmospherics, ↑atmospheric static * * * radio noise, radio emission, especially from a radio star or pulsar, characterized by random or erratic changes of amplitude or frequency …
19background noise — The level of intensity of signals due to normal activities other than the specific signal emission [16] …
20Rotor/Stator Interaction — An important issue for the aeronautical industry is the reduction of aircraft noise. The characteristics of the turbomachinery noise are to be studied. The rotor/stator interaction is a predominant part of the noise emission.We will present an… …
