A TFTR Lower Hybrid Current Drive Project has been undertaken to scope
out the design and the details of construction of a Lower Hybrid (LH)
system to provide up to 4 megawatts of 4.6 GHz rf source power throug
h a four-array coupler to TFTR. The main purpose of the this would be
to provide TFTR with a current profile control system. The first phase
of the project would consist of relocating the existing rf sources an
d associated equipment of the 2MW system from the PBX-M device as well
as designing, fabricating and installing a vacuum vessel interface on
TFTR and a new power splitter, coupler and waveguide would have to be
implemented to interface with TFTR. Several novel features have been
added to the system to adapt it to the requirements of the TFTR experi
ment. The second phase of the project would consist of installing addi
tional 2 MW power sources from MIT and power supplies from LLNL.