J. Lohr, R. Callis, J. Doane, Y. Gorelov, H. Grunloh, K. Kajiwara, J. Peavy, D. Ponce, J. Tooker, P. Borchard, S. Chu, S. Cauffman, L. Ives
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Preparation for tests of a 110 GHz gyrotron with collector potential depression and status of the ECH system on the DIII-D Tokamak
A 110 GHz gyrotron designed for long pulse operation at P/sub rf/>1.0 MW is tested at the DIII-D facility. The unit is predicted to have efficiency >0.4 with collector potential depression. Some transmission line components require modification for operation at total rf energies >5 MJ per pulse. The ECH system is also being upgraded with the addition of three new gyrotrons.