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 1MHz 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 nuclear-radiation background on the measurement uncertainties are calculated to predict performance on ITER.
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Presented at: Advanced Imaging and Plasma Diagnostics”. ‘Ceratopia Toki’, Toki, Japan. December 5 - 8, 2006
Published in: Plasma and Fusion Research Volume 2, S1067 20 November (2007)
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Download PPPL-4296 (pdf 1.9 MB)
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