P. J. Spuig

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On the Tore Supra tokamak, a far infrared polarimeter diagnostic has been routinely used for diagnosing the current density by measuring the Faraday rotation angle. A high precision of measurement is needed to correctly reconstruct the current profile. To reach this precision, electronics used to compute the phase and the amplitude of the detected signals(More)
On Tore Supra, a far infrared interfero-polarimeter diagnostic has been routinely used for diagnosing the electron and current density by measuring the Faraday rotation angle. As this angle is a few dozen of degrees on present plasma fusion devices, a high precision is needed to correctly reconstruct the current profile. In this article we have analysed the(More)
The Tore Supra tokamak real-time plasma control is based on measurements coming from various diagnostics. The complexity of all the events that occur during plasma is at the origin of measurements disturbances which have to be corrected in real time in order to ensure an optimal control. The signal correction does not just mean processing but requires(More)
For the Tore Supra interferometer phase measurements, an electronics had been developed electronics using field programmable gate array processors. The embedded algorithm can correct the fringe jumps. For comparison, the electronics ran at JET during the 2009 campaign. The first analysis concluded that the electronics was not correcting all the fringe(More)
Tore Supra uses a ten channel FIR interferometer to measure the plasma density. The plasma density is deduced from the phase between a shifted reference beam and a probing beam that crosses the plasma, however the counting of the fringes is affected by several kinds of plasma events that make the signal too low to be reliably measured. The last upgrade of(More)
In recent years there has been a major upgrade of the JET far infrared diagnostic system consisting of a new laser system with the wavelength at 118.8 μm at and more advanced processing electronics for phase counting. This provides a second colour measurement of the electron plasma density on the vertical system. Due to(More)
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