Diagnostic applications of the TFTR XIS system
- 1 August 1986
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 57 (8) , 2136-2138
- https://doi.org/10.1063/1.1138709
Abstract
The horizontal x-ray imaging system (XIS) on the tokamak fusion test reactor (TFTR) tokamak is an array of 64 silicon surface-barrier x-ray diodes, with a 2.5-cm spatial resolution. The XIS system is primarily used to study magnetohydrodynamic (MHD) instabilities, but has also been used to measure electron thermal diffusivity, electron temperature, the radius of the q=1 surface, plasma vertical position, and toroidal rotation of the plasma. Movable absorber-foil arrays provide energy selection. Bandpass analog filters and digital techniques have been used on the x-ray signals in an attempt to infer turbulence levels in the plasmas. Details of the above techniques will be presented.Keywords
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