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Encyclopedia > Incoherent scatter

Incoherent scatter refers to a ground-based technique for studying the earth's ionosphere. A radar beam scattering off electrons in the ionospheric plasma creates an incoherent scatter echo. The ionospheric electrons are controlled by the much slower and massive positive ions - electron density fluctuations relate to ion temperature, mass distribution, and motion. The incoherent scatter signal allows measurement of electron density, ion temperature, and electron temperature. The ionosphere is the part of the atmosphere that is ionized by solar radiation. ... This long range radar antenna (approximately 40m (130ft) in diameter) rotates on a track to observe activities near the horizon. ... Properties The electron (also called negatron, commonly represented as e−) is a subatomic particle. ... The word plasma has a Greek root which means to be formed or molded (the word plastic shares this root). ... Electron density is the measure of the probability of an electron being present at a specific location. ...


External Links

  • Incoherent Scatter Mechanism (http://www.eiscat.se/is-methods.html) - from EISCAT

  Results from FactBites:
 
Results From MCNP Simulations (759 words)
The total, direct and incoherent scatter doses from a simulation similar to that shown in Figure 1 are shown in Figure 2.
The correlation coefficient for the coherent scatter and the direct dose is 0.93 (where 1 would represent perfect correlation) and that for the incoherent scatter and direct dose is mathematically undefined.
The effect on x-ray scatter dose of a relative shift of 1 mm between the final collimator and the object being radiographed and of rotation of the final collimator so that its end faces are displaced by 1 mm from the x-ray beam axis.
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