Abstract
SIMULTANEOUS directional observations have been made of the arrival of atmospherics and of penetrating radiation, using a wireless cathode-ray direction finder and a pair of Geiger-Müller counters. The radio installation was the standard frequency-conversion direction finding apparatus1 developed and used at the Radio Research Station, Slough, for investigations of the direction of arrival of atmospherics. The arrival of an atmospheric from a particular direction is indicated by the momentary deflection of the beam of a cathode-ray oscillograph in a corresponding direction, and is recorded photographically on film moving continuously in a vertical direction at a speed of 1.25 cm. per second. The counters recording penetrating radiation were arranged to receive particles coming from an easterly direction. Simultaneous discharges of the two counters were selected and used to impress a small unidirectional deflection on the beam of the oscillograph used in the direction finder.
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References
Watt and Herd, J. Inst. Elec. Eng., 64, 611; 1926. “The Cathode-Ray Oscillograph in Radio Research”, H.M. Stationery Office, 1933.
Schonland and Viljoen, Proc. Roy. Soc., A, 140, 314; 1933.
Wilson, Proc. Camb. Phil. Soc., 22, 534; 1925.
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APPLETON, E., BOWEN, E. Sources of Atmospherics and Penetrating Radiation. Nature 132, 965 (1933). https://doi.org/10.1038/132965a0
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DOI: https://doi.org/10.1038/132965a0
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