Abstract
A new prototype for protection of the vertical port against fast electrons escaping from the plasma due to trapping in magnetic field ripple was installed on Tore Supra in 1998. It is actively cooled and designed to withstand a steady state high heat flux, up to 20 MW/m2, due to fast electrons accelerated by the LH wave and lost in the magnetic field ripple. Results demonstrating the effectiveness of this prototype protection are presented. Important information concerning modelling of fast electron losses, which will play a crucial role in the final design, are also discussed.
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