2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/86804The Rosenbluth form for the collision operator for a weakly relativistic plasma is derived. The formalism adopted by Antonsen and Chu can then be used to calculate the efficiency of current drive by fast waves in a relativistic plasma. Accurate numerical results and analytic asymptotic limits for the efficiencies are given.LaTeX 2.09, 22 pages, 5 figuresPlasma Physicstext