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James A. Van Allen lab journal, September 1959-January 1961
Page 226
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11/27/60 New electron multipliers: Du Mont SP 228 -- 6 stage SP 224 -- 10 stage Will operate (it is claimed) after indefinite exposure to the atmosphere Immense possibilities! McIlwain has two of each!
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11/27/60 New electron multipliers: Du Mont SP 228 -- 6 stage SP 224 -- 10 stage Will operate (it is claimed) after indefinite exposure to the atmosphere Immense possibilities! McIlwain has two of each!
Van Allen Papers
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