The major results and accomplishments of the MIT tokamak program are surveyed. These are considered to be 1) discovery of an ohmic-heating confinement law in which TE -naR 2 ; 2) reduction of anomalous ion conduction to the neoclassical value by use of pellet fueling; 3) formulation of an empirical model for confinement of impurities in ohmically-heated tokamaks; 4) seminal experiments on current drive by lower hybrid waves and production of quasi-stationary driven current discharges with n -1020 m-3 ; and 5) heating of electrons by Landau damping of lower hybrid waves withATe -I keV. The advance of nOTE is also traced from values of -1018 sec-m-3 which were typical of tokamaks at the beginning of the Alcator program to values achieved on Alcator C in excess of 6 x 1019 sec-m-3 , which is required for thermalized energy breakeven at higher temperature.

Experimental verification of lower-hybrid RF current drive in the Versator II tokamak is presented. The experiments show that efficient current drive exists only in low density discharges (ffe < 6 X 101 2 cm-3) in the "slide-away" regime where a preformed supra-thermal electron tail exists prior to the application of the RF power.