In-situ non-destructive testing of superconducting dipoles in the Tevatron

Since the commissioning of the Tevatron in 1984 there have been a number of magnetic failures. Most of the failures were caused by conductor motion at the magnet ends during field ramping. Visual and X-ray methods used to identify those magnets in the tunnel that showed incipient damage and were likely to fail later are described. These magnets were repaired on the tunnel and returned to service. The visual method used a fiber-optic bore scope and could only be used at room temperature. The X-ray method used a collimated radioactive source and could be done on warm or cold magnets. The combination of these methods provided information on placement and constraint of the conductor in the magnet ends. Results from a nine week repair period are presented.<
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