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Instrument details
Acronym
HEP
Full name
High Energy Particles Experiment
Purpose
To measure high energy particles traveling through the magnetosphere up to 25 MeV for electrons, 35 MeV for protons, and 210 MeV/charge for ions
Short description
Assemblage of five instruments: a low-energy particle detector, a burst detector, two medium-energy Isotope detectors and a high energy Isotope detector. Energy ranges: 0.02-2.5 MeV (electrons), 0.002-35 MeV (protons), 0.004-140 MeV (alpha-particles) and 0.002-210 MeV/n (ions with Z from 3 to 26)
Background
Part of a package of instruments to observe the Magnetosphere by navigating across its tail
Scanning Technique
Travelling cross the Magnetosphere in a highly-elliptical orbit
Resolution
N/A
Coverage / Cycle
Magnetospheric volume
Mass
Power
Data Rate
Providing Agency
JAXA
Instrument Maturity
Flown on an R&D satellite
Utilization Period:
1992-10-02 to 2003
Last update:
2021-12-06
Detailed characteristics
Satellites this instrument is flying on
Note: a red tag indicates satellites no longer operational, a
green tag indicates operational satellites, a blue tag indicates
future satellites
Instrument classification
Solar and space environment monitors Energetic particle spectrometer
WIGOS Subcomponents
Subcomponent 2 Electron sensor [cross magnetosphere] Proton sensor [cross magnetosphere] Alpha-particle sensor [cross magnetosphere] Heavy ion sensor [cross magnetosphere]
Mission objectives
Primary mission objectives Alpha particles differential directional flux Electron differential directional flux Heavy ion angular flux energy and mass spectrum Heavy ion flux energy and mass spectrum Proton differential directional flux Show all Show fewer
Tentative Evaluation of Measurements
The following list indicates which measurements can typically be
retrieved from this category of instrument. To see a full Gap Analysis by Variable,
click on the respective variable.
Note: table can be sorted by clicking on the column headers
Instrument: HEP