Couple of nice references: Observation of high intensity radiation by satellites 1958 Alpha and Gamma J A Van Allen Journal of Jet Propulsion http://www-pw.phy

Couple of nice references: Observation of high intensity radiation by satellites 1958 Alpha and Gamma J A Van Allen Journal of Jet Propulsion http://www-pw.physics.uiowa.edu/ProfVanAllen/1958_VanAllen_ObservationOfHighIntensityRadiationBySatellites1958AlphaAndGamma_JPL_28_588-592.pdf http://www-pw.physics.uiowa.edu/ProfVanAllen/1958_VanAllen_O... Apollo Experience Report - Protection from Radiation Technical Note TN D-7080, March 1973 https://www.hq.nasa.gov/alsj/tnD7080RadProtect.html https://www.hq.nasa.gov/alsj/tnD7080RadProtect.html