Trapped solar wind He,Ne, and Ar and energetic He in Surveyor 3 |
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| Authors: | Robert L Warasila Oliver A Schaeffer |
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| Institution: | Department of Earth and Space Sciences, State University of New York at Stony Brook, Stony Brook, N.Y., USA |
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| Abstract: | The Apollo 12 mission brought back sections of the Surveyor 3 vehicle suitable for mass spectrometric studies of implanted solar wind and solar cosmic rays. Using this method, we have determined an average solar wind 4He flux of 6.1 × 106 ions/cm2 sec for the 31 months of exposure. We have also measured 4He/3He= 2700 ± 50;4He/20Ne= 410 ± 30;20Ne/22Ne= 13.5 ± 0.2;20Ne/36Ar= 24.5 ± 2.5; and 36Ar/38Ar= 5.41 ± 0.20. These measurements provide solar wind values averaged over considerably longer periods of time than the Apollo Solar Wind Composition experiments and suggest that the short term SWC measurements during a period of high solar activity may not be a reliable measure of average solar wind composition. |
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