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James A. Van Allen journal, October 1955-March 1958
Page 250
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micrometeorites (at WSPG and at Fort Churchill.) Expect micrometeorites to make flash of light and blackening of film -- also, perhaps, some physical residue. (McDonald) 2) A Friedman-type NO ionization chamber for detecting Lyman - alpha intensity from the sun. Also uses an O sub 2 window for a narrow band pass optical filter. ([Naugle?]) 3) A specially treated Platinum photoelectric surface to measure solar radiation having lambda < 1800 Angstroms D.C. current electrometer ([Nangle?])
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micrometeorites (at WSPG and at Fort Churchill.) Expect micrometeorites to make flash of light and blackening of film -- also, perhaps, some physical residue. (McDonald) 2) A Friedman-type NO ionization chamber for detecting Lyman - alpha intensity from the sun. Also uses an O sub 2 window for a narrow band pass optical filter. ([Naugle?]) 3) A specially treated Platinum photoelectric surface to measure solar radiation having lambda < 1800 Angstroms D.C. current electrometer ([Nangle?])
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