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At the request of Commander Smiley, Chairman of the POLARIS/MINUTEMAN/PERSHING Nondestructive Test Committee, we have cooperated with ASTM Committee E-7 on Nondestructive Testing in preparing a report on the development of the scanning technique now used at the aerojet-General Corp. Sacramento plant to inspect the Polaris missile. The title of the device is GIGI, which stands for Gamma Inspection of the Grain Integrity. This paper presents a brief review of the research and development that went into designing the gamma inspection cubicle now in operation at the Sacramento plant. The parameters involved in the development of this grain inspection system, the analytical approach (see Appendix), and the physical variables encountered will be considered.
Underhill, Paul E.
Manager, Instruments and Controls Department, Aerojet-General Nucleonics, San Ramon, Calif