Transcribe
Translate
James Van Allen journal, 1951?-December 1954
Page 68
More information
digital collection
archival collection guide
transcription tips
27 July 1951 [red pencil circle here:] Cerenkov counter Suggested by Salant and Hornbostel to me as a method of getting upward moving albedo radiation at the top of the atmosphere The real virtue of the Cerenkov counter is its unidirectionality The scheme is to use a set of two counters or one counter rotated (or quickly switched) [sketch/picture] drawing of 2 items: 1up down2 (1) detects only upward moving radiation with beta ~ 1.0 (2) detects only downward moving radiation with beta ~ 1.0 1/2 ratio gives estimate of relative "upward" moving albedo. Geometric factor can probably be made ~0.1 to 1 (cm exponent 2) sterad. therefore, At latitude 52 degrees (Iowa City), expect at
Saving...
prev
next
27 July 1951 [red pencil circle here:] Cerenkov counter Suggested by Salant and Hornbostel to me as a method of getting upward moving albedo radiation at the top of the atmosphere The real virtue of the Cerenkov counter is its unidirectionality The scheme is to use a set of two counters or one counter rotated (or quickly switched) [sketch/picture] drawing of 2 items: 1up down2 (1) detects only upward moving radiation with beta ~ 1.0 (2) detects only downward moving radiation with beta ~ 1.0 1/2 ratio gives estimate of relative "upward" moving albedo. Geometric factor can probably be made ~0.1 to 1 (cm exponent 2) sterad. therefore, At latitude 52 degrees (Iowa City), expect at
Van Allen Papers
sidebar
