The B00 model coil in the ATLAS magnet test facility

A 1-m size model coil has been developed to investigate the transport prope rties of the three aluminum-stabilized superconductors used in the ATLAS ma gnets. The coil, named B00, is also used for debugging the cryogenic, power and control systems of the ATLAS Magnet Test Facility. The coil comprises two double pancakes made of the Barrel Toroid and End-Cap Toroid conductors and a single pancake made of the Central Solenoid conductor. The pancakes are placed inside an aluminum coil casing. The coil construction and coolin g conditions are quite similar to the final design of the ATLAS magnets. Th e B00 coil is well equipped with various sensors to measure thermal and ele ctro-dynamic properties of the conductor inside the coils. Special attentio n has been paid on the study of the current diffusion process and the norma l zone propagation in the ATLAS conductors and findings. Special pick-up co ils have been made to measure the diffusion at different currents and magne tic field values.