NSSDCA ID: 1992-064A-04
Mission Name: FrejaThe cold plasma experiment utilized a spherical plate, electrostatic energy analyzer to monitor electrons and ions of E/Q upto 200 eV/Q with the help of a Microchannel Plate (MCP). The incident location of the deflected particle on the plate provided eV/Q (radial distance) and the arrival angle (azimuth angle at the plate). The energy resolution (delta-E/E) could be programmed to be in the range of 0.05 to 0.20. The angular resolution of the arrival direction could be programmed to be as small as 10 deg in azimuth and 5 deg in elevation. Typical temporal resolution is about 10 ms,occasionally extended to 0.1 ms. A built-in Sun sensor enabled location of the actual direction of arrival. Monitored data were telemetered either directly as a matrix of 16 (angle) x 16 (energy), or processesd in house to provide number density, temperature and drift velocity for telemetering. The high temporal and spatial resolution enabled identification of waves of upto 3 kHz, and currents down to 10 micro Amperes per square meter. The instrument is inoperative since 25 May 1994.
Mass: 5.5 kg
Power (avg): 8.4 W
Bit rate (avg): 16.384 kbps
Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. James A. Koehler | Co-Investigator | University of Saskatchewan | koehler@skisas.usask.ca |
Dr. Donald J. McEwen | Co-Investigator | University of Saskatchewan | mcewen@dansas.usask.ca |
Prof. Rickard Lundin | Co-Investigator | Swedish Institute for Space Physics | rickard.lundin@irf.se |
Dr. Andrew W. Yau | Co-Investigator | National Research Council of Canada | yau@space.phys.ucalgary.ca |
Dr. Lars Eliasson | Co-Investigator | Swedish Institute for Space Physics | lars@irf.se |
Dr. David J. Knudsen | General Contact | University of Calgary | knudsen@phys.ucalgary.ca |
Dr. David J. Knudsen | Principal Investigator | University of Calgary | knudsen@phys.ucalgary.ca |