Publisher： IOP Publishing
E-ISSN： 1741-4326|55|12|123016-123022
ISSN： 0029-5515
Source： Nuclear Fusion, Vol.55, Iss.12, 2015-11, pp. : 123016-123022
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
The effective ionic charge, &${{Z}_{text{eff}}}$ ;, is determined through the integration of soft x-ray tomography and charge exchange recombination spectroscopy impurity density measurements in the Madison Symmetric Torus. &${{Z}_{text{eff}}}$ ; is found is be 2.3  ±  0.1 in the core of high temperature, high current, improved confinement discharges, with a slightly hollow profile peaking near mid-radius. A Bayesian probability framework, developed as part of an on-going effort in Integrated Data Analysis, was used to incorporate these two measurements. This framework provides a method to address different systematic and statistical uncertainties associated with each diagnostic and to test hypothetical contributions to &${{Z}_{text{eff}}}$ ; against the existing data set. The combined analysis provides much higher confidence in the result than previous single-diagnostic attempts to characterize &${{Z}_{text{eff}}}$ ; using near-infrared bremsstrahlung or x-ray spectroscopy.
Related content
Access to resources
Recommend
Measurements of hard x-ray emission from runaway electrons in DIII-D
By James A.N. Austin M.E. Commaux N. Eidietis N.W. Evans T.E. Hollmann E.M. Humphreys D.A. Hyatt A.W. Izzo V.A. Jernigan T.C. Haye R.J. La Parks P.B. Strait E.J. Tynan G.R. Wesley J.C. Yu J.H.
Nuclear Fusion, Vol. 52, Iss. 1, 2012-01 ,pp. :
X‐RAY DETERMINATION OF THE STRUCTURE OF GLASS *
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Vol. 75, Iss. 1, 1992-01 ,pp. :