There might be something on GN drives (or at least GN theory) in the Catalog - thing's a couple exabytes in size and not the best-indexed archive in existence - but in practice a solid-state handwavium generator provides roughly the same power curve with less futzing about with Jupiter and significantly lower chances of irritating the Many-Angled Ones.
Mr. Fnord interdimensional man of mystery
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"I. Drink. Your. NERDRAGE!"
Mr. Fnord interdimensional man of mystery
FenWiki - Your One-Stop Shop for Fenspace Information
"I. Drink. Your. NERDRAGE!"