Benchmarking atomic physics models for magnetically confined fusion plasma physics experiments

M.J. May, M. Finkenthal, V. Soukhanovskii, D. Stutman, H.W. Moos, D. Pacella, G. Mazzitelli, K. Fournier, W. Goldstein, B. Gregory

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Abstract

In present magnetically confined fusion devices, high and intermediate Z impurities are either puffed into the plasma for divertor radiative cooling experiments or are sputtered from the high Z plasma facing armor. The beneficial cooling of the edge as well as the detrimental radiative losses from the core of these impurities can be properly understood only if the atomic physics used in the modeling of the cooling curves is very accurate. To this end, a comprehensive experimental and theoretical analysis of some relevant impurities is undertaken. Gases (Ne, Ar, Kr, and Xe) are puffed and nongases are introduced through laser ablation into the FTU tokamak plasma. The charge state distributions and total density of these impurities are determined from spatial scans of several photometrically calibrated vacuum ultraviolet and x-ray spectrographs (3-1600 Å), the multiple ionization state transport code transport code (MIST) and a collisional radiative model. The radiative power losses are measured with bolometery, and the emissivity profiles were measured by a visible bremsstrahlung array. The ionization balance, excitation physics, and the radiative cooling curves are computed from the Hebrew University Lawrence Livermore atomic code (HULLAC) and are benchmarked by these experiments. (Supported by U.S. DOE Grant No. DE-FG02-86ER53214 at JHU and Contract No. W-7405-ENG-48 at LLNL.) © 1999 American Institute of Physics.
Original languageEnglish
Pages (from-to)375 - 378
Number of pages4
JournalReview of Scientific Instruments
Volume70
Issue number1 II
Publication statusPublished - Jan 1999
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Instrumentation

Cite this

May, M. J., Finkenthal, M., Soukhanovskii, V., Stutman, D., Moos, H. W., Pacella, D., ... Gregory, B. (1999). Benchmarking atomic physics models for magnetically confined fusion plasma physics experiments. Review of Scientific Instruments, 70(1 II), 375 - 378.