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News

  • Jan 7 2009 - An updated near-relativistic impulsive Beam-like electron event list available for download.
  • Nov 10 2002 - ApJ electron timing study.
  • Nov 10 2002 - ApJ CME/electron study.
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Welcome to the ACE/EPAM Home Page.

APL is the central processing and analysis facility for the Electron, Proton, and Alpha Monitor (EPAM) particle instrument, one of six sensors and three instruments in the Advanced Composition Explorer (ACE) mission.

EPAM is composed of five telescope apertures of three different types. Two Low Energy Foil Spectrometers (LEFS) measure the flux and direction of electrons above 30 keV (geometry factor = 0.397 cm^2 sr), two Low Energy Magnetic Spectrometers (LEMS) measure the flux and direction of ions greater than 50 keV (geometry factor = 0.48 cm^2 sr), and the Composition Aperture (CA) measures the elemental composition of the ions (geometry factor = 0.24 cm^2 sr). The telescopes use the spin of the spacecraft to sweep the full sky. Solid-state detectors are used to measure the energy and composition of the incoming particles.


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spacer ACE Project - Instrument summaries
and other ACE material @ GSFC
spacer Investigator: Dr. R. Gold
- the JHU Applied Physics Laboratory
spacer ACE Fact Sheet
@ JHU/APL
spacer Dr. D. Haggerty
- The JHU Applied Physics Laboratory dennis.haggerty@jhuapl.edu
spacer ACE Instrument Development and Science Center @ Caltech
spacer ACE Instruments:
  • EPAM, JHU/APL
  • CRIS & SIS, Caltech
  • MAG
  • SEPICA
  • SWEPAM
  • SWICS
  • SWIMS
  • ULEIS, JHU/APL & UMD
  • spacer ACE Mission Operations Center @ GSFC
    spacer The JHU/APL Space Department
    spacer The JHU/APL EPAM data page
    spacer EPAM bibliography

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    Last Updated on Sep 21, 2011

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