Integrated Science Investigation of the Sun explained

Integrated Science Investigation of the Sun or IS☉IS, is an instrument aboard the Parker Solar Probe, a space probe designed to study the Sun. IS☉IS is focused on measuring energetic particles from the Sun, including electrons, protons, and ions.[1] The parent spacecraft was launched in early August 2018, and with multiple flybys of Venus will study the heliosphere of the Sun from less than 4 million kilometers or less than 9 solar radii.[2] [3]

IS☉IS consists of two detectors, EPI-Lo and EPI-Hi, corresponding to detection of relatively lower and higher energy particles.[4] EPI-Lo is designed to detect from about 20 keV per nucleon up to 15 MeV (mega electronvolts) total energy, and for electrons from about 25 keV up to 1000 keV.[4] EPI-Hi is designed to measure charged particles from about 1– to 200 MeV per nucleon and electrons from about 0.5 to 6 MeV, according to a paper about the device.[4]

The shortname includes a symbol for the Sun, a circle with a dot in it: ☉.[1] NASA suggests pronouncing the name as "ee-sis" in English.[5]

Operations

By September 2018, IS☉IS had been turned on and first light data was returned.[6]

EPI-Hi

EPI-Hi includes:[7]

The detectors are solid-state devices.[7]

EPI-Lo

EPI-Lo includes 8 wedge detectors, fed by 80 separate entrances.[7] These entrances correspond to covering a field of view over almost a full hemisphere.[8]

EPI-Lo can record differential energy spectra for electrons, Hydrogen, Helium-3, Helium-4, Carbon, Oxygen, Neon, Magnesium, Silicon, and Iron.[7]

See also

Notes and References

  1. News: Parker Solar Probe Instruments: IS☉IS. JHUAPL. Parker Solar Probe. 2018-10-20. en.
  2. News: NASA Solar Probe Flies By Venus on Its Way to 'Touch' the Sun. Space.com. 2018-10-20.
  3. News: After Near-Perfect Trajectory Maneuver, Parker Solar Probe On Course To Touch The Sun. JHUAPL. Parker Solar Probe. 2018-10-20. en.
  4. McComas. D. J.. Alexander. N.. Angold. N.. Bale. S.. Beebe. C.. Birdwell. B.. Boyle. M.. Burgum. J. M.. Burnham. J. A.. 2014-07-05. Integrated Science Investigation of the Sun (ISIS): Design of the Energetic Particle Investigation. Space Science Reviews. en. 204. 1–4. 187–256. 10.1007/s11214-014-0059-1. 0038-6308. free.
  5. Web site: Parker Solar Probe Instruments. 12 July 2018.
  6. Web site: Illuminating First Light Data from Parker Solar Probe – Parker Solar Probe. blogs.nasa.gov. 19 September 2018 . en-US. 2018-12-23.
  7. The Integrated Science Investigation of the Sun (ISIS): Energetic Particle Measurements for the Solar Probe Plus Mission . 32nd International Cosmic Ray Conference . Beijing, China . January 2011 . https://web.archive.org/web/20220928094835/https://ntrs.nasa.gov/api/citations/20110013395/downloads/20110013395.pdf . 28 September 2022 . live . McComas, D. J. . Christian, E. R. . Wiedenbeck, M. E. . McNutt, R. L. . Cummings, A. C. . Desai, M. I. . Giacalone, J. . Hill, M. E. . Mewaldt, R. E. . Krimigis, S. M. . Livi, S. A. . Mitchell, D. G. . Matthaeus, W. H. . Roelof, E. C. . Schwadron, N. A. . Stone, E. C. . von Rosenvinge, T. T..
  8. Web site: Integrated Science Investigation of the Sun (ISʘIS) | Space Physics at Princeton.

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