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- The Cosmic Ray Isotope Spectrometer (CRIS) on the Advanced Composition
Explorer (ACE) spacecraft is intended to be a major step in
ascertaining the isotopic composition of the cosmic rays and hence a
major step in determining their origin. The Galactic cosmic rays
(GCRs) consist, by number, primarily of hydrogen nuclei (~92%) and He
nuclei (~7%). The heavier nuclei (1%) provide most of the information
about cosmic-ray origin through their elemental and isotopic
composition. The intensities of these heavy cosmic rays are very low
and progress in the past has been impeded by limited particle
collection power, particularly regarding individual isotopes. CRIS is
designed to have far greater collection power (~250 cm2-sr) than
previous satellite instruments ( < 10 cm2-sr) while still maintaining
excellent isotopic resolution up through Z=30 (Zinc) and beyond.
See:
http://www.srl.caltech.edu/ACE/CRIS_SIS/cris.html
Group: Instrument_Details
Entry_ID: CRIS
Group: Instrument_Identification
Instrument_Category: Solar/Space Observing Instruments
Instrument_Class: Particle Detectors
Short_Name: CRIS
Long_Name: Cosmic Ray Isotope Spectrometer
End_Group
Group: Associated_Platforms
Short_Name: ACE
End_Group
Online_Resource: http://www.srl.caltech.edu/ACE/CRIS_SIS/cris.html
Online_Resource: http://www.srl.caltech.edu/ACE/CRIS_SIS/crishw.html
Sample_Image: http://www.srl.caltech.edu/ACE/CRIS_SIS/images/CRIS.jpeg
Group: Instrument_Logistics
Data_Rate: 0.464 kbps
Instrument_Start_Date: 1997-08-25
Instrument_Owner: NASA
Instrument_Owner: California Institute of Technology
Instrument_Owner: Washington University, St. Louis
End_Group
End_Group
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