A new actively cooled advanced launcher is being built for Tore Supra LHCD
to inject 4 MW during 1000 s at 3.7 GHz, at a power density of 25 MW/m(2) (
a conservative value observed in Tore Supra experiments). It is made from a
n array of 6 x 48 active and 6 x 9 passive waveguides. The design uses tech
nologies which are relevant for a next step machine such that it can: (i) w
ithstand a plasma radiated flux of 0.15 MW/m(2); (ii) radiate power with sp
ectra having peak N// values of 2.02 +/- 0.35; (iii) withstand a total torq
ue of 8.6 10(4) N m during disruptions; (iv) allow an antenna 20 cm radial
stroke adjustable in real time, (v) withstand a convected power flux of 10
MW/m(2) on its guard limiter made of CFC tiles. A prototype of each new com
ponent of this antenna has been tested successfully at the nominal power wi
th a pulse length of 1000 s. (C) 2000 Elsevier Science B.V. All rights rese
rved.