87:, and along with SWAP is designed to detect ions. Ions come in and pass through two foils, which when they pass through these foils they are timed, then they hit a solid state detector. The time of flight between the two foils helps determine the particles mass, and the detector measures the energy, and from this the composition of the particle can be determined within certain parameters. The instrument is designed to "taste" the atmosphere of Pluto, and design is oriented towards being low weight, low power, and understanding the nature of atmospheric loss from Pluto.
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115:(planet Mercury orbiter, launched 2004/ended 2015) called the Energetic Particle Spectrometer. PEPSSI complements the focus of SWAP, which is oriented towards lower energy ions. Whereas PEPSSI measures ions with energies from about 10 keV to 1000 keV, SWAP measures ions from 25 to 7.5 keV. PEPSSI's electron detectors are capable of measuring energetic electronics with a range of 25KeV - 500KeV. An aluminium layer is also present to filter out protons and ions.
20:
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95:, with the time recorded for the time between these detections. After passing through this section, there is a solid state silicon detector. The design avoided using magnets for the time of flight section, which enhanced weight and/or power savings for the instrument. The instruments sensor and collimator are integrated to form the sensor module, which is mounted on board the electronic board stack.
71:. Data about Jupiter and its magnetotail was also collected by PEPSSI during its 2007 flyby of that planet. Beyond Pluto and into the Kuiper belt, PEPSSI can be used to study how the solar wind interacts with interstellar wind, adding to the data pile from the Voyager's which also exited the solar system in a similar direction as the trajectory of New Horizons.
468:
McNutt, Ralph L.; Livi, Stefano A.; Gurnee, Reid S.; Hill, Matthew E.; Cooper, Kim A.; Andrews, G. Bruce; Keath, Edwin P.; Krimigis, Stamatios M.; Mitchell, Donald G.; Tossman, Barry; Bagenal, Fran; Boldt, John D.; Bradley, Walter; Devereux, William S.; Ho, George C.; Jaskulek, Stephen E.; Lefevere,
90:
PEPPSI is a compact low-power ion measurement device, and it is a time of flight type of instrument The design detects ions from about 10 keV to 1 MeV in a fan shaped160 degree by 12 degree arc. The device has a mass of 1.5 kg (3.31 lb) and can consume about 2.5 watts of electrical power.
74:
One of the expectations that was not confirmed by PEPSSI was that sunlight would make a large bubble of ionized gases around Pluto from its atmosphere. PEPSSI found that the rate of atmospheric loss was only 0.01 percent of what was anticipated, and the region of interaction with the solar wind was
118:
PEPSSI has an enhanced design to reduce weight and power consumption having to do with electron detection, with heritage going back the 1980s and 1990s. The instrument on MESSENGER was based on an instrument for that periods proposals for a Pluto flyby mission. The design can trace back to some
367:
L., McNutt, Ralph; E., Hill, Matthew; M., Lisse, Carey; Peter, Kollmann; Fran, Bagenal; M., Krimigis, Stamatios; J., McComas, David; A., Elliott, Heather; J., Wolk, Scott (November 2015). "Escape of Pluto's
Atmosphere: In Situ Measurements from the Pluto Energetic Particle Spectrometer Science
227:
McNutt, Ralph L.; Livi, Stefano A.; Gurnee, Reid S.; Hill, Matthew E.; Cooper, Kim A.; Andrews, G. Bruce; Keath, Edwin P.; Krimigis, Stamatios M.; Mitchell, Donald G. (October 2008). "The Pluto
Energetic Particle Spectrometer Science Investigation (PEPSSI) on the New Horizons Mission".
56:. It is one of seven major scientific instruments aboard the spacecraft. The spacecraft was launched in 2006, flew by Jupiter the following year, and went onto flyby Pluto in 2015 where PEPSSI was able to record and transmit back to Earth its planned data collections.
106:(ASICs). Additional power saving decisions involved the use of lower current Micro Channel Plates, a newly designed low-voltage power supply, and a re-designed fime-of-flight circuit board with a higher gain and reduced power usage.
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The 160 by 12 degree field of view is covered by six detectors each with a 25 by 12 degree field of view. By noting which detector the particle has arrived at, its overall direction of input can be noted.
469:
Thomas W.; Malcom, Horace; Marcus, Geoffrey A.; Hayes, John R.; Moore, G. Ty; Perry, Mark E.; Williams, Bruce D.; Wilson, Paul; Brown, Lawrence E.; Kusterer, Martha B.; Vandegriff, Jon D. (2008).
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which passed by Pluto. During the flyby PEPSSI sent data back to Earth every day. During the journey to Pluto, PEPSSI was also used to record data about the
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PEPSSI is designed to help understand the rate of atmospheric loss from the atmosphere of Pluto into space, which is thought experience
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and beyond, it is designed to measure ions and electrons. Specifically, it is focused on measuring ions escaping from the
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704:"ASICs for the Pluto Energetic Particle Spectrometer Science Investigation on NASA's New Horizons mission to Pluto"
439:"ASICs for the Pluto Energetic Particle Spectrometer Science Investigation on NASA's New Horizons mission to Pluto"
319:"ASICs for the Pluto Energetic Particle Spectrometer Science Investigation on NASA's New Horizons mission to Pluto"
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Investigation (PEPSSI) instrument on New
Horizons and Remote Observations from the Chandra X-ray observatory".
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The Pluto
Energetic Particle Spectrometer Science Investigation (PEPSSI) on the New Horizons Mission
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The Pluto
Energetic Particle Spectrometer Science Investigation (PEPSSI) on the New Horizons Mission
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https://pds-ppi.igpp.ucla.edu/data/NH-P-PEPSSI-2-PLUTO-V3.0/DOCUMENT/pepssi_ssr.pdf
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63:-like atmosphere loss into outer space. These ions blend in with the surrounding
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New
Horizons: Reconnaissance of the Pluto-Charon System and the Kuiper Belt
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PEPSSI is based on an instrument that was on board the
Discovery program's
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To meet the low power use and weight requirements, the device made use of
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411:"New Horizons Color Images Reveal Two Distinct Faces of Pluto"
341:"New Horizons Color Images Reveal Two Distinct Faces of Pluto"
32:
Pluto
Energetic Particle Spectrometer Science Investigation
370:
AAA/Division for
Planetary Sciences Meeting Abstracts #47
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heritage to instruments in the 1980s for detecting ions.
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Cape
Canaveral Air Force Station Space Launch Complex 41
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The location of PEPSSI among the seven instruments on
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Paschalidis, Nicholas; McNutt, Ralph (January 2010).
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83:PEPSSI is one of the seven major instruments on
651:. Dordrecht: Springer Netherlands. p. 381.
552:(March 25, 2016) - Sky & Telescope Magazine
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131:Mass: 1.5 kilograms (3.31 pounds); 1475 grams
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394:: CS1 maint: multiple names: authors list (
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571:"Payload Technical Specifications"
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740:PEPSSI Pluto encounter data link
140:Ion energy detection range: 20 k
443:38th Cospar Scientific Assembly
409:Gipson, Lillian (2015-07-01).
339:Gipson, Lillian (2015-07-01).
292:Talbert, Tricia (2015-03-25).
1:
604:Russell, C. T. (2009-02-28).
1173:Southwest Research Institute
294:"Spacecraft and Instruments"
75:much smaller than expected.
1158:Goddard Space Flight Center
38:), is an instrument on the
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1148:Applied Physics Laboratory
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1163:Jet Propulsion Laboratory
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508:10.1007/s11214-008-9436-y
260:10.1007/s11214-008-9436-y
137:Field of view: 160°×12°
1384:Spacecraft instruments
1325:Hubble Space Telescope
1183:University of Colorado
647:McNutt, Ralph (2009).
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817:New Frontiers program
478:Space Science Reviews
230:Space Science Reviews
134:Power use: ~2.5 watts
69:interplanetary medium
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1343:Pluto Kuiper Express
803:Exploration of Pluto
1178:Stanford University
500:2008SSRv..140..315M
455:2010cosp...38.2235P
382:2015DPS....4710509M
252:2008SSRv..140..315M
93:microchannel plates
50:atmosphere of Pluto
1309:Deep Space Network
573:. Pluto.jhuapl.edu
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1141:Institutions
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865:Observations
810:New Horizons
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711:. Retrieved
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25:New Horizons
24:
1330:Kuiper belt
1303:launch site
1283:upper stage
1229:Cathy Olkin
1067:Instruments
910:28978 Ixion
905:15810 Arawn
735:instruments
199:Pickup ions
1373:Categories
1249:Hal Weaver
1244:Alan Stern
1114:Subsystems
1059:Spacecraft
841:132524 APL
713:2019-01-03
689:2019-01-03
577:2022-06-09
420:2018-10-27
376:: 105.09.
350:2018-10-20
303:2018-10-20
205:References
65:solar wind
1293:3rd stage
1262:Logistics
1224:Brian May
1214:Marc Buie
1134:Personnel
680:"Payload"
516:121584795
491:0709.4428
276:121584795
268:0038-6308
243:0709.4428
112:MESSENGER
1360:Category
1289:Star 48B
1121:GPHS-RTG
987:Rejected
930:Makemake
808:List of
798:Timeline
184:List of
149:See also
144:to 1 MeV
1318:Related
1279:Centaur
1269:Atlas V
1031:2014 PN
1019:2014 OS
1007:2014 MT
995:2011 HM
972:2012 HE
894:2011 KW
882:2011 JY
872:Neptune
846:Jupiter
827:Targets
731:NASA -
496:Bibcode
451:Bibcode
378:Bibcode
248:Bibcode
127:Specs:
1192:People
1168:KinetX
1085:PEPSSI
920:Haumea
915:Quaoar
876:Triton
834:Flybys
812:topics
614:
514:
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