MEASUREMENTS OF SPACECRAFT CABIN RADIATION DISTRIBUTIONS FOR THE FOURTH AND SIXTH GEMINI FLIGHTS.

Five passive dosimetry packages were placed aboard the Gemini-4 and Gemini-6 spacecraft at points of maximum, minimum, and intermediate shielding. Each passive dosimetry package contained the following dosimeters photoluminescent glass, lithium fluoride and calcium fluoride thermoluminescent dosimeters, discharge ionization chambers, nuclear emulsions, activation foils, and disks of cellulose nitrate plastic. The relationship of the spacecraft shielding to the experimental results and the response of the detectors to charged particles are discussed. The greatest variation in readings between the results from any two packages on the same flight was a factor of 2. As anticipated, there was a general trend of increasing total dosage with mission length, and decreasing dose with increasing overall shielding. The majority of the particles that penetrated into the spacecraft cabin were protons. Author