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James A. Van Allen journal, October 1955-March 1958
Page 31
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of the crystal. (That is, not circuit pickup due to corona, etc in X-ray tube) We must now undertake a more quantitative study of the effect. (a) Match flight values of counting rates & ratio of shielded to unshielded. Then observe crystal output. (b) Try different orientations with respect to the beam to see if peaks and voltages of actual flights can be simulated by changing orientation. Generally speaking now, it does appear that X-rays of energies, from ~20 kev up to ~80-100 kev provide an explanation of the auroral effect.
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of the crystal. (That is, not circuit pickup due to corona, etc in X-ray tube) We must now undertake a more quantitative study of the effect. (a) Match flight values of counting rates & ratio of shielded to unshielded. Then observe crystal output. (b) Try different orientations with respect to the beam to see if peaks and voltages of actual flights can be simulated by changing orientation. Generally speaking now, it does appear that X-rays of energies, from ~20 kev up to ~80-100 kev provide an explanation of the auroral effect.
Van Allen Papers
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