Allen Roger McBride. The Ring of Charon

The Hunted Earth - 1.Volume One of "The Hunted Earth" sequence. Science is toil and hard work — except when it verges on miracle. When Larry O’Shawnessy Chao manages to harness the giant Ring of Charon, orbiting Pluto’s only moon, to control a field of over one million gravities, he feels a touch of the miraculous.