Studies of suprathermal electron loss in the magnetic ripple of Tore Supra

A new prototype for protection of the vertical port against fast electrons escaping from thf plasma due to trapping in magnetic field ripple was insta lled on Tore Supra in 1998. It is actively cooled and designed to withstand a steady state high heat flux, up to 20 MW/m(2), due to fast electrons acc elerated by the LH wave and lost in the magnetic field ripple. Results demo nstrating the effectiveness of this prototype protection are presented. Imp ortant information concerning modelling of fast electron losses, which will play a crucial role in the final design, are also discussed.