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= JEDI = From Wikipedia, the free encyclopedia

This article is about an instrument aboard the Juno spacecraft. For other uses, see Jedi (disambiguation). Juno 's JEDI Jupiter aurora; the bright spot at far left is the end of field line to Io; spots at bottom lead to Ganymede and Europa Artist generated diagram showing the location of various instruments JEDI (Jupiter Energetic-particle Detector Instrument), is an instrument on the Juno spacecraft orbiting planet Jupiter. It is part of a suite of instruments to study the magnetosphere of Jupiter. JEDI consists of three identical detectors that use microchannel plates and foil layers to detect the energy, angle, and types of ion within a certain range. It can detect electrons between 40 and 500 keV (Kilo electron-volts), and hydrogen and oxygen from a few tens of keV to less than 1000 keV (1 MeV). JEDI uses radiation hardened Application Specific Integrated Circuits (ASIC)s. JEDI was turned on in January 2016 while still en route to Jupiter to also study interplanetary space.

JEDI is designed to collect data on "energy, spectra, mass species (H, He, O, S), and angular distributions"; the plan is to study the energies and distribution of charged particles. It can detect them at between 30 keV and 1 GeV, whereas JADE, another instrument on the spacecraft, is designed to observe below 30 keV. One of the concepts being studied is that energy from Jupiter's rotation is being converted into its atmosphere and magnetosphere.

It is radiation hardened to collect in situ data on the planet's auroral magnetic field lines, the equatorial magnetosphere, and the polar ionosphere  It was built by the Johns Hopkins University Applied Physics Laboratory (APL). One of the goals is to understand the aurora, and how particles are accelerated to such high speeds. One of the mysteries of Jupiter is that X-rays are emitted from the poles, but do not seem to come from the auroral ring.

Each detector has a field of view of 120 degree by 12 degrees, and they are positioned to provide a 360 degree (a full circle) view of the sky along that axis.

JEDI can detected particles from 30 to 1000 keV including: In relation to other space missions, an instrument on the Earth-orbiting Van Allen Probes (launched 2012), called RBSPICE, is nearly identical to JEDI.This type of instrument is also similar to the PEPSSI instrument on New Horizons (Pluto/Kupiter probe).
 * Electrons
 * Proton (hydrogen) ions
 * Helium ions
 * Sulfur ions
 * Oxygen ions
 * Energetic neutral atoms

See also[edit]

 * JunoCam (Visible-light camera on Juno orbiter)
 * Jovian Auroral Distributions Experiment (JADE)
 * Jovian Infrared Auroral Mapper (JIRAM)
 * Magnetometer (Juno) (MAG)
 * UVS (Juno)
 * Microwave Radiometer (Juno
 * Waves (Juno) (Radio and Plasma wave instrument)
 * Gravity Science

References[edit]

 * 1) Jump up^ Official NASA Juno Instruments and Spacecraft diagram
 * 2) ^ Jump up to:a b c d
 * 3) ^ Jump up to:a b [1 ]
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 * 5) Jump up^ NASA’s Juno and JEDI: Ready to Unlock Mysteries of Jupiter - June 2016
 * 6) Jump up^
 * 7) ^ Jump up to:a b NASA - Video on JEDI Archived 2013-09-28 at the Wayback Machine.
 * 8) Jump up^
 * 9) Jump up^
 * 10) Jump up^
 * 11) Jump up^ NASA’s Juno and JEDI: Ready to Unlock Mysteries of Jupiter June 2016
 * 12) Jump up^ NASA’s Juno and JEDI: Ready to Unlock Mysteries of Jupiter - June 2016
 * 13) ^ Jump up to:a b The Van Allen Probes Mission edited by Nicola Fox, James L. Burch