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- Energetic_neutral_atom abstract "Energetic neutral atom (ENA) imaging, often described as "seeing with atoms", is a technology used to create global images of otherwise invisible phenomena in the magnetospheres of planets and at the boundary of the heliosphere - the far-flung outer edge of the solar system.ENA images are constructed from the detection of energetic neutral atoms that are created in charge-exchange processes between ions in a hot plasma, such as the solar wind, and the atoms of a cold neutral background gas.Earth's magnetosphere preserves Earth's atmosphere and protects us from cell-damaging radiation. This region of "space weather" is the site of geomagnetic storms that disrupt communications systems and pose radiation hazards to humans traveling at high polar altitudes or in orbiting spacecraft. A deeper understanding of this region is vitally important. Geomagnetic weather systems have been late to benefit from the satellite imagery taken for granted in weather forecasting, and space physics because their origins in magnetospheric plasmas present the added problem of invisibility.The heliosphere protects the entire solar system from the majority of cosmic rays but is so remote that only an imaging technique such as ENA imaging will reveal its properties. The heliosphere's structure is due to the invisible interaction between the solar wind and cold gas from the local interstellar medium.The creation of ENAs by space plasmas was predicted but their discovery was both deliberate and serendipitous. While some early efforts were made at detection, their signatures also explained inconsistent findings by ion detectors in regions of expected low ion populations. Ion detectors were co-opted for further ENA detection experiments in other low-ion regions. However, the development of dedicated ENA detectors entailed overcoming significant obstacles in both skepticism and technology.Although ENAs were observed in space from the 1960s through 1980s, the first dedicated ENA camera was not flown until 1997 with the NASA/ESA/ASI Cassini mission, to study Saturn's magnetosphere. Cassini's ENA images of Saturn revealed a unique magnetosphere with complex interactions that have yet to be fully explained.Today, dedicated ENA instruments have provided detailed magnetospheric images from Venus, Mars, Jupiter, and Saturn. The IMAGE mission's three dedicated ENA cameras observed Earth's magnetosphere from 2000 – 2005 while the TWINS Mission, launched in 2008, provides stereo ENA imaging of Earth's magnetosphere using simultaneous imaging from two satellites.The first ever images of the heliospheric boundary, published in October 2009, were made by the ENA instruments aboard the IBEX and Cassini spacecraft. These images are very exciting because they challenge existing theories about the region.".
- Energetic_neutral_atom thumbnail HENA_Earth's_Ring_Current_July_2000_Geomagnetic_Storm.gif?width=300.
- Energetic_neutral_atom wikiPageExternalLink lPubs.html.
- Energetic_neutral_atom wikiPageExternalLink lNeutralAtomRefs.html.
- Energetic_neutral_atom wikiPageID "24793719".
- Energetic_neutral_atom wikiPageRevisionID "589277933".
- Energetic_neutral_atom hasPhotoCollection Energetic_neutral_atom.
- Energetic_neutral_atom subject Category:Geophysics.
- Energetic_neutral_atom subject Category:Image_sensors.
- Energetic_neutral_atom subject Category:Planetary_science.
- Energetic_neutral_atom subject Category:Plasma_physics.
- Energetic_neutral_atom subject Category:Space_plasmas.
- Energetic_neutral_atom type Artifact100021939.
- Energetic_neutral_atom type Detector103180969.
- Energetic_neutral_atom type Device103183080.
- Energetic_neutral_atom type ImageSensors.
- Energetic_neutral_atom type Instrumentality103575240.
- Energetic_neutral_atom type Object100002684.
- Energetic_neutral_atom type PhysicalEntity100001930.
- Energetic_neutral_atom type Whole100003553.
- Energetic_neutral_atom comment "Energetic neutral atom (ENA) imaging, often described as "seeing with atoms", is a technology used to create global images of otherwise invisible phenomena in the magnetospheres of planets and at the boundary of the heliosphere - the far-flung outer edge of the solar system.ENA images are constructed from the detection of energetic neutral atoms that are created in charge-exchange processes between ions in a hot plasma, such as the solar wind, and the atoms of a cold neutral background gas.Earth's magnetosphere preserves Earth's atmosphere and protects us from cell-damaging radiation. ".
- Energetic_neutral_atom label "Energetic neutral atom".
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- Energetic_neutral_atom wasDerivedFrom Energetic_neutral_atom?oldid=589277933.
- Energetic_neutral_atom depiction HENA_Earth's_Ring_Current_July_2000_Geomagnetic_Storm.gif.
- Energetic_neutral_atom isPrimaryTopicOf Energetic_neutral_atom.
