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James Van Allen journal, 1951?-December 1954
Page 93
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"Progress in Cosmic Ray Physics" North Holland Publishing Company, Volume I Amsterdam (1951) ------------------------------------------------------------ In ONR - ESP, volume 5 number 16 of (15 August 1951), an ingenious scheme for an integral altitude-time curve is described It is due to: K. Kristiansson of University of Lund. [sketch/picture] lengthwise cross-section of tube including: Po alpha source, d, 15 cm length, C-2 nuclear emulsion, 2 cm diameter The tube is open to the ambient pressure The residual range in the emulsion is a function of the product p x d where p is pressure in the tube. Is calibrated pre-flight wise by bell-jar tests? After flight the number of alpha particle trails is obtained as a function of the
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"Progress in Cosmic Ray Physics" North Holland Publishing Company, Volume I Amsterdam (1951) ------------------------------------------------------------ In ONR - ESP, volume 5 number 16 of (15 August 1951), an ingenious scheme for an integral altitude-time curve is described It is due to: K. Kristiansson of University of Lund. [sketch/picture] lengthwise cross-section of tube including: Po alpha source, d, 15 cm length, C-2 nuclear emulsion, 2 cm diameter The tube is open to the ambient pressure The residual range in the emulsion is a function of the product p x d where p is pressure in the tube. Is calibrated pre-flight wise by bell-jar tests? After flight the number of alpha particle trails is obtained as a function of the
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