A gamma-ray imager for arms control

The authors have developed a gamma-ray imaging system (GRIS) to inspect for nuclear warheads by imaging the highly penetrating gamma-radiation emitted by radioactive materials integral to warheads. Such an image may be used to obtain the compliment of warheads aboard the missile. The authors describe the GRIS operating principles and capabilities, present data, and discuss the advantages and disadvantages of such a system for arms control. Field results are presented from a use of GRIS on an emplaced Peacekeeper missile. Improvements to GRIS in light of the field trial results are presented.<
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