Results and update on the TdeV facility

TdeV (Tokamak de Varennes) was operated in 1988 in a limiter mode and upgraded in 1989-90 to run in a double or single null poloidal divertor configuration with neutralizing plates in closed chambers behind an Inconel first wall liner (R=0.87 m, a=≤0.28 m and Ip up to 300 kA). Graphite limiters and divertor plates are electrically insulated from the liner and support structures for plasma biasing and current injection experiments. A new pair of internal fast horizontal positioning coils is also available. A comprehensive set of diagnostics permits detailed impurity and current transport experiments as well as studies of scrape-off layer physics and plasma-wall interactions under various conditions. A 1 MW, 3.7 GHz lower-hybrid-current-drive system is currently under construction for long pulse plasma experiments (∼30 sec) scheduled to begin in 1993. (author) 2 refs., 2 figs., 1 tab