A digital lock-in upgrade of the motional Stark effect diagnostic on DIII-D.

Abstract

The use of lock-in amplifiers for phase sensitive detection of motional Stark effect (MSE) diagnostic signals is of critical importance to real-time internal current profile measurements in tokamak plasmas. A digital lock-in (DLI) upgrade utilizing field programable gate array firmware has been installed on the MSE system of the DIII-D tokamak for the… (More)
DOI: 10.1063/1.3496989

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