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JEDI

April 12, 2024

This article is about an instrument aboard the Juno spacecraft. For other uses, see Jedi (disambiguation).

JEDI (Jupiter Energetic-particle Detector Instrument[1]) is an instrument on the Juno spacecraft orbiting planet Jupiter.[2] JEDI coordinates with the several other space physics instruments on the Juno spacecraft to characterize and understand the space environment of Jupiter's polar regions, and specifically to understand the generation of Jupiter's powerful aurora.[3] It is part of a suite of instruments to study the magnetosphere of Jupiter.[2] 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.[4] 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).[4] JEDI uses radiation hardened Application Specific Integrated Circuits (ASIC)s.[5] JEDI was turned on in January 2016 while still en route to Jupiter to also study interplanetary space.[6] JEDI uses solid state detectors (SSD's) to measure the total energy (E) of both the ions and the electrons. The MCP anodes and the SSD arrays are configured to determine the directions of arrivals of the incoming charged particles. The instruments also use fast triple coincidence and optimum shielding to suppress penetrating background radiation and incoming UV foreground.[3]

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 is designed to collect data on "energy, spectra, mass species (H, He, O, S), and angular distributions";[2] the plan is to study the energies and distribution of charged particles.[7] 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.[8] One of the concepts being studied is that energy from Jupiter's rotation is being converted into its atmosphere and magnetosphere.[8]

It is radiation hardened to collect in situ data on the planet's auroral magnetic field lines, the equatorial magnetosphere, and the polar ionosphere[2] It was built by the Johns Hopkins University Applied Physics Laboratory (APL).[9] One of the goals is to understand the aurora, and how particles are accelerated to such high speeds.[10] 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.[11]

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.[12] The Juno spacecraft travels very rapidly in the close vicinity of Jupiter (up to 50 km/s) and also spins very slowly (2 RPM).[3]

JEDI can detected particles from 30 to 1000 keV including:[12]

In relation to other space missions, an instrument on the Earth-orbiting Van Allen Probes (launched 2012), called RBSPICE, is nearly identical to JEDI.[13] This type of instrument is also similar to the PEPSSI instrument on New Horizons (Pluto/Kupiter probe).[13]

JEDI in combination with data from UVIS detected electrical potentials of 400,000 electron volts (400 keV), 20–30 times higher than Earth, driving charged particles into the polar regions of Jupiter.[14]

A scientific paper Juno observations of energetic charged particles over Jupiter's polar regions: Analysis of monodirectional and bidirectional electron beams included results from a close pass over Jupiter's poles in August 2016 for electrons (25–800 keV) and protons (10–1500 keV).[15] The paper analyzed electron angular beams in the auroral regions.[16]

See also edit

References edit

  1. ^ Official NASA Juno Instruments and Spacecraft diagram
  2. ^ a b c d D. K. Haggerty; B. H. Mauk; C. P. Paranicas (December 2008). "JEDI – The Jupiter Energetic Particle Detector for the Juno mission". AGU Fall Meeting Abstracts. 2008: SM41B–1683. Bibcode:2008AGUFMSM41B1683H.
  3. ^ a b c Mauk, B. H.; Haggerty, D. K.; Jaskulek, S. E.; Schlemm, C. E.; Brown, L. E.; Cooper, S. A.; Gurnee, R. S.; Hammock, C. M.; Hayes, J. R. (2017-11-01). "The Jupiter Energetic Particle Detector Instrument (JEDI) Investigation for the Juno Mission". Space Science Reviews. 213 (1–4): 289–346. Bibcode:2017SSRv..213..289M. doi:10.1007/s11214-013-0025-3. ISSN 0038-6308.
  4. ^ a b Mauk, B. H.; Haggerty, D. K.; Jaskulek, S. E.; Schlemm, C. E.; Brown, L. E.; Cooper, S. A.; Gurnee, R. S.; Hammock, C. M.; Hayes, J. R.; Ho, G. C.; Hutcheson, J. C.; Jacques, A. D.; Kerem, S.; Kim, C. K.; Mitchell, D. G.; Nelson, K. S.; Paranicas, C. P.; Paschalidis, N.; Rossano, E.; Stokes, M. R. (2017). "The Jupiter Energetic Particle Detector Instrument (JEDI) Investigation for the Juno Mission". Space Science Reviews. 213 (1–4): 289. Bibcode:2017SSRv..213..289M. doi:10.1007/s11214-013-0025-3.
  5. ^ Garner, Rob (2016-07-12). "Tiny Microchips Enable Extreme Science at Jupiter". NASA. Retrieved 2017-01-06.
  6. ^ . Archived from the original on 2017-03-24. Retrieved 2016-12-20.
  7. ^ W. Grahm (2011). "ULA Atlas V launches NASA's Juno on a path to Jupiter" (Press release). Nasaspaceflight.com.
  8. ^ a b NASA - Video on JEDI 2013-09-28 at the Wayback Machine
  9. ^ (Press release). Johns Hopkins University Applied Physics Laboratory. 5 August 2011. Archived from the original on 4 March 2016. Retrieved 1 August 2013.
  10. ^ P. Gilster. "Juno: into the Jovian magnetosphere". Centari Dreams.
  11. ^ "Puzzling X-rays from Jupiter" (Press release). NASA. 7 March 2002.
  12. ^ a b . Archived from the original on 2017-03-24. Retrieved 2016-12-20.
  13. ^ a b Nicola Fox; James L. Burch (2014). The Van Allen Probes Mission. Springer Science & Business Media. p. 274. ISBN 978-1-4899-7433-4.
  14. ^ "Juno Detects Vast Amounts of Energy over Jupiter's Auroral Regions | Planetary Science, Space Exploration | Sci-News.com". Breaking Science News | Sci-News.com. Retrieved 2018-04-04.
  15. ^ Mauk, B. H.; Haggerty, D. K.; Paranicas, C.; Clark, G.; Kollmann, P.; Rymer, A. M.; Mitchell, D. G.; Bolton, S. J.; Levin, S. M.; Adriani, A.; Allegrini, F.; Bagenal, F.; Connerney, J. E. P.; Gladstone, G. R.; Kurth, W. S.; McComas, D. J.; Ranquist, D.; Szalay, J. R.; Valek, P. (2017). "Juno observations of energetic charged particles over Jupiter's polar regions: Analysis of monodirectional and bidirectional electron beams". Geophysical Research Letters. 44 (10): 4410. Bibcode:2017GeoRL..44.4410M. doi:10.1002/2016GL072286.
  16. ^ Mauk, B. H.; Haggerty, D. K.; Paranicas, C.; Clark, G.; Kollmann, P.; Rymer, A. M.; Mitchell, D. G.; Bolton, S. J.; Levin, S. M. (2017-05-25). "Juno observations of energetic charged particles over Jupiter's polar regions: Analysis of monodirectional and bidirectional electron beams". Geophysical Research Letters. 44 (10): 4410–4418. Bibcode:2017GeoRL..44.4410M. doi:10.1002/2016gl072286. ISSN 0094-8276.

External links edit

  • The Jupiter Energetic Particle Detector Instrument (JEDI) Investigation for the Juno Mission (abstract link)

April 12, 2024
jedi, this, article, about, instrument, aboard, juno, spacecraft, other, uses, jedi, disambiguation, jupiter, energetic, particle, detector, instrument, instrument, juno, spacecraft, orbiting, planet, jupiter, coordinates, with, several, other, space, physics,. This article is about an instrument aboard the Juno spacecraft For other uses see Jedi disambiguation JEDI Jupiter Energetic particle Detector Instrument 1 is an instrument on the Juno spacecraft orbiting planet Jupiter 2 JEDI coordinates with the several other space physics instruments on the Juno spacecraft to characterize and understand the space environment of Jupiter s polar regions and specifically to understand the generation of Jupiter s powerful aurora 3 It is part of a suite of instruments to study the magnetosphere of Jupiter 2 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 4 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 4 JEDI uses radiation hardened Application Specific Integrated Circuits ASIC s 5 JEDI was turned on in January 2016 while still en route to Jupiter to also study interplanetary space 6 JEDI uses solid state detectors SSD s to measure the total energy E of both the ions and the electrons The MCP anodes and the SSD arrays are configured to determine the directions of arrivals of the incoming charged particles The instruments also use fast triple coincidence and optimum shielding to suppress penetrating background radiation and incoming UV foreground 3 Juno s JEDIJupiter aurora the bright spot at far left is the end of field line to Io spots at bottom lead to Ganymede and EuropaArtist generated diagram showing the location of various instrumentsJEDI is designed to collect data on energy spectra mass species H He O S and angular distributions 2 the plan is to study the energies and distribution of charged particles 7 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 8 One of the concepts being studied is that energy from Jupiter s rotation is being converted into its atmosphere and magnetosphere 8 It is radiation hardened to collect in situ data on the planet s auroral magnetic field lines the equatorial magnetosphere and the polar ionosphere 2 It was built by the Johns Hopkins University Applied Physics Laboratory APL 9 One of the goals is to understand the aurora and how particles are accelerated to such high speeds 10 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 11 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 12 The Juno spacecraft travels very rapidly in the close vicinity of Jupiter up to 50 km s and also spins very slowly 2 RPM 3 JEDI can detected particles from 30 to 1000 keV including 12 Electrons Proton hydrogen ions Helium ions Sulfur ions Oxygen ions Energetic neutral atoms ENA s In relation to other space missions an instrument on the Earth orbiting Van Allen Probes launched 2012 called RBSPICE is nearly identical to JEDI 13 This type of instrument is also similar to the PEPSSI instrument on New Horizons Pluto Kupiter probe 13 JEDI in combination with data from UVIS detected electrical potentials of 400 000 electron volts 400 keV 20 30 times higher than Earth driving charged particles into the polar regions of Jupiter 14 A scientific paper Juno observations of energetic charged particles over Jupiter s polar regions Analysis of monodirectional and bidirectional electron beams included results from a close pass over Jupiter s poles in August 2016 for electrons 25 800 keV and protons 10 1500 keV 15 The paper analyzed electron angular beams in the auroral regions 16 See also editGravity Science IS IS energetic particle detector on Parker Solar Probe Jovian Auroral Distributions Experiment JADE Jovian Infrared Auroral Mapper JIRAM JunoCam Visible light camera on Juno orbiter Magnetometer Juno MAG Microwave Radiometer Juno Pluto Energetic Particle Spectrometer Science Investigation SWAP New Horizons measures the Solar Wind on the New Horizons mission to Pluto and beyond SWEAP measures ions and electrons on the Parker Solar Probe UVS Juno Waves Juno Radio and Plasma wave instrument References edit Official NASA Juno Instruments and Spacecraft diagram a b c d D K Haggerty B H Mauk C P Paranicas December 2008 JEDI The Jupiter Energetic Particle Detector for the Juno mission AGU Fall Meeting Abstracts 2008 SM41B 1683 Bibcode 2008AGUFMSM41B1683H a b c Mauk B H Haggerty D K Jaskulek S E Schlemm C E Brown L E Cooper S A Gurnee R S Hammock C M Hayes J R 2017 11 01 The Jupiter Energetic Particle Detector Instrument JEDI Investigation for the Juno Mission Space Science Reviews 213 1 4 289 346 Bibcode 2017SSRv 213 289M doi 10 1007 s11214 013 0025 3 ISSN 0038 6308 a b Mauk B H Haggerty D K Jaskulek S E Schlemm C E Brown L E Cooper S A Gurnee R S Hammock C M Hayes J R Ho G C Hutcheson J C Jacques A D Kerem S Kim C K Mitchell D G Nelson K S Paranicas C P Paschalidis N Rossano E Stokes M R 2017 The Jupiter Energetic Particle Detector Instrument JEDI Investigation for the Juno Mission Space Science Reviews 213 1 4 289 Bibcode 2017SSRv 213 289M doi 10 1007 s11214 013 0025 3 Garner Rob 2016 07 12 Tiny Microchips Enable Extreme Science at Jupiter NASA Retrieved 2017 01 06 NASA s Juno and JEDI Ready to Unlock Mysteries of Jupiter June 2016 Archived from the original on 2017 03 24 Retrieved 2016 12 20 W Grahm 2011 ULA Atlas V launches NASA s Juno on a path to Jupiter Press release Nasaspaceflight com a b NASA Video on JEDI Archived 2013 09 28 at the Wayback Machine Space scientists seek returns from JEDI Press release Johns Hopkins University Applied Physics Laboratory 5 August 2011 Archived from the original on 4 March 2016 Retrieved 1 August 2013 P Gilster Juno into the Jovian magnetosphere Centari Dreams Puzzling X rays from Jupiter Press release NASA 7 March 2002 a b NASA s Juno and JEDI Ready to Unlock Mysteries of Jupiter June 2016 Archived from the original on 2017 03 24 Retrieved 2016 12 20 a b Nicola Fox James L Burch 2014 The Van Allen Probes Mission Springer Science amp Business Media p 274 ISBN 978 1 4899 7433 4 Juno Detects Vast Amounts of Energy over Jupiter s Auroral Regions Planetary Science Space Exploration Sci News com Breaking Science News Sci News com Retrieved 2018 04 04 Mauk B H Haggerty D K Paranicas C Clark G Kollmann P Rymer A M Mitchell D G Bolton S J Levin S M Adriani A Allegrini F Bagenal F Connerney J E P Gladstone G R Kurth W S McComas D J Ranquist D Szalay J R Valek P 2017 Juno observations of energetic charged particles over Jupiter s polar regions Analysis of monodirectional and bidirectional electron beams Geophysical Research Letters 44 10 4410 Bibcode 2017GeoRL 44 4410M doi 10 1002 2016GL072286 Mauk B H Haggerty D K Paranicas C Clark G Kollmann P Rymer A M Mitchell D G Bolton S J Levin S M 2017 05 25 Juno observations of energetic charged particles over Jupiter s polar regions Analysis of monodirectional and bidirectional electron beams Geophysical Research Letters 44 10 4410 4418 Bibcode 2017GeoRL 44 4410M doi 10 1002 2016gl072286 ISSN 0094 8276 External links editThe Jupiter Energetic Particle Detector Instrument JEDI Investigation for the Juno Mission abstract link Retrieved from https en wikipedia org w index php title JEDI amp oldid 1183434745, wikipedia, wiki, book, books, library,

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