MAGNETIC MEASUREMENTS ON THE TCV TOKAMAK

The TCV Tokamak was designed to create a large variety of plasma shape s. Such a large flexibility requires high precision magnetic measureme nts with a good spatial coverage. This article gives a detailed descri ption of the magnetic sensor geometry, fabrication, calibration, the a ssociated electronics, and the diagnostic operation and monitoring. A substantial effort has been made to quantify the precision in the meas urements and a novel method has been developed to derive corrections i n the sensor position and calibration which optimise the consistency o f the entire measurement set. Accuracy of 0.5 mWb in the poloidal flux and 1 mT in the magnetic field with a position error of a few mm have been achieved. (C) 1998 American Institute of Physics. [S0034-6748(98 )02006-1].