Support System Design Incorporating Carbon/Epoxy Tension Straps for a Four Tesla, One Meter Bore, MRI Magnet
The Texas Accelerator Center (TAC) constructed a four tesla, one meter bore, MRI magnet. Graphite/epoxy tension straps with thermal intercepts at 77 K and 20 K were used for a safe, efficient, and cost effective support system. Sixteen straps were used to support the 10,400 kg cold mass. TAC used a superferric concept to restrict the fringe field. With proper alignment the attractive forces between the magnet and iron are designed to cancel. Therefore, easy adjustment for proper positioning of the magnet, and strength to withstand the magnetic forces due to any misalignment are requirements of the support system. Since the MRI magnet was shipped by truck, the support system had to withstand dynamic loads. The design conduction heat load to the cold mass is 0.05 W. Details of the support system are presented.
KeywordsPermeability Transportation Helium Epoxy Ductility
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