Soft x-ray virtual diagnostics for tokamak simulations

Journal Article · Sun Nov 15 00:00:00 EST 2009 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3245344· OSTI ID:22051082

Kim, J S; Zhao, L; Bogatu, I N; In, Y ^[1]; Turnbull, A; Osborne, T ^[2]; Maraschek, M ^[3]; Comer, K ^[4]

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1. FAR-TECH, Inc., 3550 General Atomics Court, Building 15, Suite 155, San Diego, California 92121 (United States)
2. General Atomics, 3550 General Atomics Court, San Diego, California 92121-1122 (United States)
3. Max-Planck-Institute for Plasma Physics, Boltzmannstr. 2, D-85748 Garching (Germany)
4. University of Wisconsin, Madison, Wisconsin 53706 (United States)

The numerical toolset, FAR-TECH Virtual Diagnostic Utility, for generating virtual experimental data based on theoretical models and comparing it with experimental data, has been developed for soft x-ray diagnostics on DIII-D. The virtual (or synthetic) soft x-ray signals for a sample DIII-D discharge are compared with the experimental data. The plasma density and temperature radial profiles needed in the soft x-ray signal modeling are obtained from experimental data, i.e., from Thomson scattering and electron cyclotron emission. The virtual soft x-ray diagnostics for the equilibriums have a good agreement with the experimental data. The virtual diagnostics based on an ideal linear instability also agree reasonably well with the experimental data. The agreements are good enough to justify the methodology presented here for utilizing virtual diagnostics for routine comparison of experimental data. The agreements also motivate further detailed simulations with improved physical models such as the nonideal magnetohydrodynamics contributions (resistivity, viscosity, nonaxisymmetric error fields, etc.) and other nonlinear effects, which can be tested by virtual diagnostics with various stability modeling.

• OSTI ID: 22051082
• Journal Information: Review of Scientific Instruments, Vol. 80, Issue 11; Other Information: (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
COMPARATIVE EVALUATIONS
DOUBLET-3 DEVICE
ELECTRON EMISSION
ELECTRONS
EXPERIMENTAL DATA
INSTABILITY
MAGNETOHYDRODYNAMICS
NONLINEAR PROBLEMS
PLASMA DENSITY
PLASMA DIAGNOSTICS
SOFT X RADIATION
SYNCHROTRON RADIATION
THOMSON SCATTERING