  The Divertor Tokamak Test (DTT) facility will be equipped with in-vessel
divertor coils able to locally modify the flux surfaces in the divertor region.
When the first DTT divertor had not been selected, four in-vessel divertor
coils were considered, with 10 turns each, fed by independent 4-quadrant SCR
(thyristor) 0.5 kV - 5 kA - power supplies. This configuration was able to meet
the design criteria in terms of requested performance and operational
constraints, but one of the coils is not compatible with the geometry of the
first DTT divertor, and another coil, scarcely efficient, can be removed. This
paper discusses the design criteria, illustrates the possible revised layout,
and illustrates the performance that can be achieved.
