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- The objective of the CPI investigation on Geotail is to make comprehensive
observations of the three-dimensional velocity distribution functions of
electrons and positive ions, with identification of ion species. The instrument
contains three sets of quadrispherical analyzers with channel electron
multipliers. These three obtain three-dimensional measurements for hot plasma
and solar wind electrons, for solar wind ions, and for positive-ion composition
measurements. The positive-ion composition measurement includes five miniature
imaging mass spectrometers at the exit aperture of the analyzer, and covers
masses from 1 to 550 u/Q at 100 eV, and 1 to 55 u/Q at 10 keV. The hot plasma
analyzer measures electrons and ions in the range 1-50,000 eV/Q. The solar wind
analyzer measures ions from 150 to 7,000 eV/Q. Sequencing of the energy
analyzers and mass spectrometers, and other control functions, are provided by
two microprocessors.
Principal Investigator:
Prof. Louis A. Frank
Department of Physics and Astonomy
The University of Iowa
Van Allen Hall, Iowa cty, IA 52242-1479
Phone: 1-319-335-1695
Fax: 1-319-335-1753
e-mail: frank@iowasp.physics.uiowa.edu
See:
http://pwg.gsfc.nasa.gov/geotail_inst.shtml
and
http://www-pi.physics.uiowa.edu/www/cpi/
Group: Instrument_Details
Entry_ID: CPI-G
Group: Instrument_Identification
Instrument_Category: Solar/Space Observing Instruments
Instrument_Class: Particle Detectors
Short_Name: CPI-G
Long_Name: Comprehensive Plasma Investigation-Geotail
End_Group
Group: Associated_Platforms
Short_Name: GEOTAIL
End_Group
Online_Resource: http://www-pi.physics.uiowa.edu/www/cpi/
Online_Resource: http://pwg.gsfc.nasa.gov/geotail_inst.shtml#CPI
Sample_Image: http://www-pi.physics.uiowa.edu/cpi/cpi_description/cpi_plate2.gif
Group: Instrument_Logistics
Data_Rate: 4.608 kbps
Instrument_Start_Date: 1992-07-24
Instrument_Owner: University of Iowa
End_Group
End_Group
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