"Whether the next large proton accelerator (20 TeV ?) is built on a national basis or as an international effort, to be affordable, innovations in construction must be made. The design of a superferric magnet ring buried in a pipe in the ground is explored here to see what reductions in cost might result."

"...superferric magnets (an old idea) have the advantage of simplicity, of being more sparing in the use of superconductor, less sensitive to the position of the superconductor, easier to construct, and perhaps more reliable to use."

R. R. Wilson, Snowmass 1982

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