Author/Authors :
Marfisi، نويسنده , , L. and Goniche، نويسنده , , M. and Hamlyn-Harris، نويسنده , , C. and Hillairet، نويسنده , , J. and Artaud، نويسنده , , J.F. and Bae، نويسنده , , Y.S. and Belo، نويسنده , , J. and Berger-By، نويسنده , , G. and Bernard، نويسنده , , J.M. and Cara، نويسنده , , Ph. and Cardinali، نويسنده , , A. and Castaldo، نويسنده , , C. and Ceccuzzi، نويسنده , , S. and Cesario، نويسنده , , R. and Decker، نويسنده , , J. and Delpec، نويسنده ,
Abstract :
A 20 MW Lower Hybrid Current Drive system using an antenna based on the Passive-Active Multijunction (PAM) concept is envisaged on ITER. This paper gives an overview of the mechanical analysis, modeling and design carried out on two major elements of the antenna: the grill front face, and the RF feed-through or windows. The front face will have to withstand high heat and fast neutrons fluxes directly from the plasma. It will be actively cooled and present a beryllium coating upon ITER requirement. The RF window being a critical safety importance class component (SIC) because of its tritium confinement function, two of them will be put in series on each line to achieve a double barrier. A design of a water cooled 5 GHz CW RF “pillbox” window capable of sustaining 500 kW of transmitted power is proposed. Both studies allow to move forward, and focus on critical issues, such as manufacturing processes and R&D associated programs including tests of mock-ups.
Keywords :
Rf heating , Lower hybrid , RF windows , Front face , Passive-active
