2006•Review of Scientific InstrumentsRequires access
Two-dimensional time resolved measurements of the electron temperature in MST
P. Franz, F. Bonomo, L. Marrelli, P. Martin, P. Piovesan, G. Spizzo, B. E. Chapman, D. Craig, D. J. Den Hartog, J. A. Goetz, R. O’Connell, S. C. Prager, M. Reyfman, J. S. Sarff
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Abstract
Two-dimensional (2D) time resolved images of the electron temperature profile in the core of the MST reversed field pinch plasma are presented. The measurements have been obtained with a soft x-ray (SXR) tomographic diagnostic comprised of four cameras, each with a multichannel photodiode array, viewing the plasma at different poloidal angles, with a total of 74 channels. The 2D electron temperature profile is estimated by simultaneously measuring the SXR emissivity through different beryllium foils, using the standard double-filter technique. With these methods, fast temperature variation in the core of the plasma (up to 100kHz) can be analyzed.