July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

Analysis of GCR Spectra and Composition Using Penetrating Particle Data from the CRIS Instrument on ACE

Aug 1, 2015, 3:30 PM
Amazon Foyer (World Forum)

Amazon Foyer

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Board: 234
Poster contribution CR-EX Poster 2 CR


M. Wiedenbeck (JPL/Caltech)


The Cosmic Ray Isotope Spectrometer (CRIS) on NASA's Advanced Composition Explorer (ACE) spacecraft has been making precise measurements of cosmic-ray elemental and isotopic composition and energy spectra for nearly 18 years. This instrument uses the dE/dx versus total energy technique to identify nuclei that stop in thick stacks of silicon solid-state detectors and to measure their energy. The energy range covered for these stopping particles extends up to ~280 MeV/nuc for O and ~570 MeV/nuc for Fe. We have developed a new technique for identifying particles that penetrate the entire detector stack that relies on a combination of the total energy deposited in the stack and the change of dE/dx from the front to the back of the stack. This technique allows us to extend energy spectra for cosmic-ray elements to higher energies and can be used for bridging the energy gap between the CRIS stopping-particle spectra and measurements made in low-Earth orbit by instruments such as HEAO-C2, PAMELA, and AMS-02. We will describe the technique, show some applications to extending the energy limit of the CRIS spectra, and discuss the limitations on the energy coverage that can be achieved.
Collaboration -- not specified --
Registration number following "ICRC2015-I/" 703

Primary author

M. Wiedenbeck (JPL/Caltech)


A. Cummings (Caltech) A. Davis (Caltech) A. Labrador (Caltech) E. Christian (NASA/GSFC) E. Stone (Caltech) G. de Nolfo (NASA/GSFC) M. Israel (Washington Univ.) R. Leske (Caltech) R. Mewaldt (Caltech) T. von Rosenvinge (NASA/GSFC) W. Binns (Washington Univ.)

Presentation materials

There are no materials yet.