Evaluation of Large, Multifilament Nb3Sn Conductors with a New 12-Tesla Tensile Test Apparatus
A large cryogenic tensile test apparatus has been constructed at the Lawrence Livermore Laboratory (LLL) as part of the Nb3Sn conductor program. This equipment was designed so that mechanical measurements can be made at 300, 77, or 4.2 K and critical current can be measured under simulated operating conditions as a function of the strain on large, prototype conductors for fusion magnets. The maximum operating parameters of the machine are: load of 223 kN, magnetic field of 12 T, and conductor current of 10 k A. Some of the unique features of this equipment will be described and preliminary mechanical and superconducting data on sample Nb3Sn conductors discussed.
KeywordsCritical Current Mechanical Measurement Fusion Magnet Matrix Compression Cryogenic Engineer
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