Supported Spherator 3 (SP-3) was a spherator built at PPPL. It had a mechanically supported 0.46 m radius superconductive internal ring. The ring was supported with three 4mm upper supports and three 1mm lower supports. SP-3 inspired the design of the LSP, which had the same geometry but the internal ring was levitated instead of mechanically supported.
1969 - 1969