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Accession Number:
AD0701640
Title:
RESEARCH DIRECTED TOWARD EVALUATION OF RADIATION ENVIRONMENT OF NEAR-EARTH SPACE.
Corporate Author:
NEW HAMPSHIRE UNIV DURHAM DEPT OF PHYSICS
Report Date:
1969-12-15
Abstract:
As a result of the correlation study of the sudden intensity increases seen by the ATS-1 electron spectrometer with the occurrence of magnetic substorms the following conclusions are reached 1 Electrons are produced in the 50-150 kev energy range as observed at 6.6Re during a magnetic substorm. 2 The electrons are produced at or near the midnight meridian and then drift on closed field lines around the earth. 3 The electron bunch produced as a result of the substorm in 75 of the 60 events studied is associated with precipitation observed by riometers as it drifts. 4 The frequency of occurrence of such particle substorms indicates that they might represent a quasi-steady source of electrons for the trapped radiation. Rapid fluctuations in the intensity of precipitated energetic particles during a bright aurora have been studied. The fluctuations occurred only during the period of peak precipitation and in close correlation with the peak precipitation and in close correlation with the westward surge of a bright auroral band preceding break-up. Dynamic spectral analysis of the data showed no sustained periodicities. Author
Descriptive Note:
Final rept. 17 Jun 68-15 Dec 69,
Supplementary Note:
Also includes reprint, Particle Substorms Observed at the Geostationary Orbit, pub. in Jnl. of Geophysical Research, Space Physics, v74 n21 p5019-5028, 1 Oct 69.
Pages:
0038
Contract Number:
F19628-68-C-0294
File Size:
0.00MB
