HIGH-ALTITUDE COSMIC RAY MEASUREMENTS AT FORT CHURCHILL

• Published in: Canadian Journal of Physics
• Main Authors: McDiarmid, I. B., Rose, D. C.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Canadian Science Publishing 1960
• Subjects: General Physics and Astronomy; Geiger; Fort Churchill; Churchill
• Online Access: http://dx.doi.org/10.1139/p60-069; http://www.nrcresearchpress.com/doi/pdf/10.1139/p60-069

Measurements with rocket-borne Geiger counters have been carried out at altitudes up to 250 km at Fort Churchill, Manitoba. The total primary cosmic ray intensity at a time near a solar maximum has been determined and compared with other measurements taken at times of high solar activity and also with other Geiger counter measurements obtained near a solar minimum. A low-energy radiation was observed whose intensity increased with altitude up to about 25% of the primary intensity at 250 km.