N OVIMIR A. P ABLANT M. B ITTER, L.F. D ELGADO -A PARICIO, M. G OTO, K.W. H ILL, S. L AZERSON, S. M ORITA, L. R OQUEMORE N OVIMIR A. P ABLANT M. B ITTER,

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N OVIMIR A. P ABLANT M. B ITTER, L.F. D ELGADO -A PARICIO, M. G OTO, K.W. H ILL, S. L AZERSON, S. M ORITA, L. R OQUEMORE N OVIMIR A. P ABLANT M. B ITTER, L.F. D ELGADO -A PARICIO, M. G OTO, K.W. H ILL, S. L AZERSON, S. M ORITA, L. R OQUEMORE H IGH RESOLUTION X - RAY IMAGING CRYSTAL SPECTROMETER (XICS) ON LHD

XICS HAS BECOME AN IMPORTANT PART OF THE LHD EXPERIMENTAL PROGRAM.

P RELIMINARY RESULTS SHOW THE HIGH TEMPORAL AND SPATIAL RESOLUTION OF THE XICS SYSTEM Comparisons between the single chord XCS and Thomson scattering systems show good agreement. TIME HISTORYPROFILES XICS SHOT ms INTEGRATION 2cm RESOLUTION

N EWLY INSTALLED SYSTEM IS ROUTINELY MAKING LINE - INTEGRATED TEMPERATURE MEASUREMENTS BRIGHTNESS ION TEMPERATURE ELECTRON TEMPERATURE

XICS MEASUREMENTS COMPARE WELL TO XCS AND T HOMSON Thorough validation of the XICS diagnostic is under way. ●Complete validation of inverted Te and Ti profiles is desired. ●Electron temperature comparison with Thomson. ●Ion temperature comparison with Charge Exchange Spectroscopy. ●These type of through comparisons have not been done previously! So far XICS -- Thomson comparisons at LHD have been done only for central chords: ●Agreement is excellent when argon emissivity is centrally peaked. ●Profile comparisons require equilibrium reconstructions to map the real space measurements to flux space. ●Accurate comparisons require inversion of the XICS measurements.

S PATIAL CALIBRATION OF THE XICS DIAGNOSTIC HAS BEEN COMPLETED

M ANY SPECTRAL FITTING AND XICS ANALYSIS ADVANCEMENTS HAVE BEEN COMPLETED Shot analysis (line-integrated) is now routinely performed. High resolution of the LHD XICS system allows for insight into the accuracy of our atomic physics models.

R ESULTS FROM STELLOPT HAVE BEEN INTEGRATED INTO THE XICS ANALYSIS Mapping of XICS sightline to flux space can now be performed given a VMEC output file.

I NVERSION OF XICS MEASUREMENTS HAS BEEN PERFORMED Preliminary inversion of XICS data has been performed. ●Integration with STELLOPT is still underway.

A N INVITED TALK WAS GIVEN AT THE SPIE CONFERENCE IN S AN D IEGO SPIE: Advances in Computational Methods for X-Ray Optics II Accompanying paper was recently published in the conference proceedings: X-ray imaging diagnostics for magnetically confined and laser-produced fusion plasmas Presentation was well received and a collaboration was formed to create an advanced x-ray ray-tracing simulation of the LHD XICS system. ●Simulation will allow characterization of the accuracy of our inversion procedures using actual stellarator and diagnostic geometry. ●Simulation will be based on the ray-tracing package McXtrace.

A DEDICATED EXPERIMENT WAS PERFORMED ON LHD IN COLLABORATION WITH PPPL SCIENTISTS. Measurement of Ti and Te profiles with ne scan ( x m -3 ). Equi- partition from centrally peaked Te (including suprathermal electrons) to Ti ●Experiment lead by Novimir Pablant and Shigeru Morita. Goal: Examine the evolution of ion and electron temperature profiles under ECH and neutral beam heating. ●Experiment done at low densities and magnetic field BT = 1.3Tesla, ne = 1 x m -3 ●XICS allows measurements of the ion temperature profile without the injection of the perpendicular neutral beam.

F UTURE PLANS October: ●Completion of diagnostic hardware paper to be submitted to RSI. ●Further work on STELLOPT integration and profile inversion. ●Support of LHD experimental campaign with XICS measurements. November: ●Poster at APS. ●Continued work on STELLOPT integration. ●Analysis of LHD plasma shots using inverted XICS measurements. ●Begin development of XICS simulation code. December: ●Draft of analysis/XICS validation paper. Ongoing/Future: ●Work on developing ability to perform transport analysis on LHD. ●Work on XICS upgrade for 2012.