Published May 1968
| public
Journal Article
Long-term variations of the Primary Cosmic-Ray Electron Component
Chicago
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Abstract
The intensity of primary cosmic-ray electrons has been measured from 1960 through 1966 at balloon altitude over Ft. Churchill, Manitoba. Initial measurements were made with an energy-loss vs. range counter telescope from 1960 through 1964. From 1964 through 1966 an energy-loss vs. total energy counter telescope was used. Overlapping data exist for both instruments in 1964. Our results are consistent with the absence of a solar modulation effect for electrons in the 0.25 to 1.05 BV rigidity range. The experimental errors lead to an upper limit of 60% for the possible fractional change of the electron intensity over this period.
Additional Information
© 1968 Canadian Science Publishing. Presented at the Tenth International Conference on Cosmic Rays, held in Calgary, June 19-30, 1967, MOD-43. Work supported by the National Aeronautics and Space Administration under grants No. NsG-144-61 and NsG-426 (R.V.), the National Science Foundation under grant No. GP-4709, and the U.S. Air Force Office of Scientific Research under contract AF 49 (638)-1008. We gratefully acknowledge the help given to us by R. Chipman and P. McIntyre in the analysis of the data.Additional details
- Eprint ID
- 44631
- Resolver ID
- CaltechAUTHORS:20140403-100701561
- NASA
- NsG-144-61
- NASA
- NsG-426
- NSF
- GP-4709
- Air Force Office of Scientific Research (AFOSR)
- AF 49 (638)-1008
- Created
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2014-04-03Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field
- Caltech groups
- Space Radiation Laboratory