Development of a High Resolution X-Ray Imaging Crystal Spectrometer for Measurement of Ion-Temperature and Rotation-Velocity Profiles in Fusion Energy Research Plasmas
Authors: K.W. Hill, M.L. Bitter, Ch. Broennimann, E.F. Eikenberry, A. Ince-Cushman, S.G. Lee, J.E. Rice, S. Scott, and R. Barnsley
Abstract: A new imaging high resolution x-ray crystal spectrometer (XCS) has been developed to measure continuous profiles of ion temperature and rotation velocity in fusion plasmas. Following proof-of-principle tests on the Alcator C-Mod tokamak and the NSTX spherical tokamak, and successful testing of a new silicon, pixilated detector with 1 MHz count rate capability per pixel, an imaging XCS is being designed to measure full profiles of Ti and vφ on C-Mod. The imaging XCS design has also been adopted for ITER. Ion-temperature uncertainty and minimum measurable rotation velocity are calculated for the C-Mod spectrometer. The affects of x-ray and uclear-radiation background on the measurement uncertainties are calculated to predict performance on ITER.
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Published in: Plasma and Fusion Research Volume 2, S1067 (2007) 4 pp
Presented at: Sixteenth Toki Conf. on Advanced Plasma Diagnostics and Imaging, 5 - 8 December 2006, Toki, Japan.
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Download PPPL-4283 (pdf 1.25 MB)
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