| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 6745683 | Fusion Engineering and Design | 2015 | 5 Pages |
Abstract
Accuracy of the magnet current measurements is important in the control of tokamak plasmas and there has been considerable effort to improve it. Recently a Faraday-effect optical current sensor has been used to measure up to 67Â kA in the Toroidal Field (TF) coil circuit. This measurement system has been calibrated at JET to verify its 0.1% accuracy. In addition, the data acquisition system for this measurement is automatically calibrated at the start of each JET pulse. The improved accuracy has been shown to enhance the spatial consistency of kinetic profiles at JET [1]. Due to its portability the JET project intends to employ the same Faraday-effect current transducer to calibrate other high current transducers by temporarily fitting it to other busbars, such as those in the Ohmic Heating network.
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Authors
R. Salmon, P. Smith, A. West, S.R. Shaw, D. Rendell, JET EFDA Contributors JET EFDA Contributors,