TY - JOUR
T1 - A 'multi-colour' SXR diagnostic for time and space-resolved measurements of electron temperature, MHD activity and particle transport in MCF plasmas
AU - Delgado-Aparicio, L. F.
AU - Stutman, D.
AU - Tritz, K.
AU - Finkenthal, M.
AU - Bell, R.
AU - Gates, D.
AU - Kaita, R.
AU - Leblanc, B.
AU - Maingi, R.
AU - Yuh, H.
AU - Levinton, F.
AU - Heidbrink, W.
PY - 2007/8/1
Y1 - 2007/8/1
N2 - A fast (≤0.1 ms) and compact 'multi-colour' soft x-ray array has been developed for time and space-resolved electron temperature (Te) measurements in magnetically confined fusion (MCF) plasmas. The electron temperature is obtained by modelling the slope of the continuum radiation from ratios of the available 1D-Abel inverted radial emissivity profiles over different energy ranges, with no a priori assumptions of plasma profiles, magnetic field reconstruction constraints or need of shot-to-shot reproducibility. This technique has been used to perform fast Te measurements in the National Spherical Torus Experiment (NSTX), avoiding the limitations imposed by the well-known multi-point Thompson scattering, electron cyclotron emission and electron Bernstein wave mode conversion diagnostics. The applicability of this 'multi-colour' technique for magnetohydrodynamic (MHD) mode recognition and a variety of perturbative electron and impurity transport studies in MCF plasmas is also discussed. Reconstructed 'multi-colour' emissivity profiles for a variety of NSTX scenarios are presented here for the first time.
AB - A fast (≤0.1 ms) and compact 'multi-colour' soft x-ray array has been developed for time and space-resolved electron temperature (Te) measurements in magnetically confined fusion (MCF) plasmas. The electron temperature is obtained by modelling the slope of the continuum radiation from ratios of the available 1D-Abel inverted radial emissivity profiles over different energy ranges, with no a priori assumptions of plasma profiles, magnetic field reconstruction constraints or need of shot-to-shot reproducibility. This technique has been used to perform fast Te measurements in the National Spherical Torus Experiment (NSTX), avoiding the limitations imposed by the well-known multi-point Thompson scattering, electron cyclotron emission and electron Bernstein wave mode conversion diagnostics. The applicability of this 'multi-colour' technique for magnetohydrodynamic (MHD) mode recognition and a variety of perturbative electron and impurity transport studies in MCF plasmas is also discussed. Reconstructed 'multi-colour' emissivity profiles for a variety of NSTX scenarios are presented here for the first time.
UR - http://www.scopus.com/inward/record.url?scp=34548687208&partnerID=8YFLogxK
U2 - 10.1088/0741-3335/49/8/010
DO - 10.1088/0741-3335/49/8/010
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AN - SCOPUS:34548687208
SN - 0741-3335
VL - 49
SP - 1245
EP - 1257
JO - Plasma Physics and Controlled Fusion
JF - Plasma Physics and Controlled Fusion
IS - 8
M1 - 010
ER -
