Van Allen belt


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Van Al·len belt

 (văn ăl′ən)
n.
Either of two toroidal zones containing high-energy ionized particles trapped in Earth's magnetic field and surrounding the planet, beginning at an altitude of about 800 kilometers (500 miles) and extending tens of thousands of kilometers into space.

[After James Alfred Van Allen (1914-2006), American physicist.]

Van Allen belt

n
(Physical Geography) either of two regions of charged particles above the earth, the inner one extending from 2400 to 5600 kilometres above the earth and the outer one from 13 000 to 19 000 kilometres. The charged particles result from cosmic rays and are trapped by the earth's magnetic field
[C20: named after its discoverer, J. A. Van Allen]

Van Al′len belt`

(væn ˈæl ən)
n.
either of two atmospheric regions of high-energy charged particles, one at an altitude of about 2000 mi. (3200 km) and the other at from 9000 to 12,000 mi. (14,500 to 19,000 km).
[1955–60; after J. A. Van Allen (b. 1914), U.S. physicist]

Van Al·len belt

(văn ăl′ən)
Either of two zones of high-intensity radiation surrounding the Earth. In these zones, a large number of atomic particles with high energies are trapped by the Earth's magnetic field.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Van Allen belt - a belt of charged particles (resulting from cosmic rays) above the Earth trapped by the Earth's magnetic field
earth, globe, world - the 3rd planet from the sun; the planet we live on; "the Earth moves around the sun"; "he sailed around the world"
References in periodicals archive ?
Radiation Protection: Twice during today s flight, Orion traveled through the Van Allen belt, a layer of intense radiation located above Earth s atmosphere.
Radiation Protection: Twice during today's flight, Orion traveled through the Van Allen belt, a layer of intense radiation located above Earth's atmosphere.
During the test Orion traveled through the Van Allen belt twice and reached an altitude of 3,600 miles above Earth.
But the impenetrable barrier seen by the twin Van Allen belt spacecraft stops the electrons before they get that far, said Baker.
They also don't mention the fact that the scientistwho gave his name to the supposedly deadly Van Allen belt is on the record saying it wasn't deadly at all.
The planet is surrounded by the Van Allen Belt to stop harmful radiation hitting our planet from outer space.
Therefore, the trapped particle radiation confined by the magnetosphere in the Van Allen belt is the major source of exposure in the low-Earth orbit where the ISS is located.
In another significant finding, Douglas Hamilton, an associate physics professor at the University of Maryland, found that at the beginning of these large magnetic storms on Earth, charged oxygen atoms are being drawn out of the upper reaches of Earth's atmosphere and into the Van Allen Belt.
During the EFT-1, Orion will fly through the Van Allen Belt, a dense radiation field that surrounds the Earth in a protective shell of electrically charged ions.
During EFT-1, Orion will fly through the Van Allen Belt, a dense radiation field that surrounds the Earth in a protective shell of electrically charged ions.
The outer Van Allen belt contains mostly energetic electrons, while the inner Van Allen holds mostly fast-moving protons.
high school students were tasked to design an experiment to protect a dosimeter, an instrument used for measuring radiation exposure, as Orion flies through the Van Allen Belt during EFT-1.