With Lower Hybrid Current Drive (LHCD), very long pulses can be obtain
ed in TORE SUPRA. Volt-second saving studies by LHW assisted current r
amp-up, current drive and electron heating are first discussed. A 12 s
econds stationary discharge with improved energy confinement time (40
%) by peaking the current profile is presented with a central electron
temperature up to Te(o) approximately 10 keV . A 1 minute flat top ti
me duration discharge has been achieved with a plasma current I(p) = 1
MA : 80 % of this current is driven by LHW. During this discharge the
core density is fed continuously by deuterium gas puff indicating tha
t the inner first wall is still pumping all along the shot. Finally re
sults concerning the interaction of LHW with high density plasmas (pea
k density approximately 10(20) m-3) and 3 MeV fusion protons are given
.