Validation of collisional radiative modelling of emission line ratios for helium beam plasma diagnostic
نویسنده
چکیده
منابع مشابه
Development of fast helium beam emission spectroscopy on MST
Emission from an energetic neutral helium beam has been investigated as a potential localized diagnostic for the plasma parameters. A collisional-radiative model in atomic data and analysis structure was used to estimate evolutions of the atomic level populations in the beam and the beam emission intensities. It has been found that singlet lines are insensitive to the local metastable fraction ...
متن کاملCollisional Plasma Models with Apec/aped: Emission Line Diagnostics of Hydrogen-like and Helium-like Ions
New X-ray observatories (Chandra and XMM-Newton) are providing a wealth of high-resolution X-ray spectra in which hydrogenand helium-like ions are usually strong features. We present results from a new collisional-radiative plasma code, the Astrophysical Plasma Emission Code (apec), which uses atomic data in the companion Astrophysical Plasma Emission Database (aped) to calculate spectral model...
متن کاملEmission intensities and line ratios from a fast neutral helium beam
The emission intensities and line ratios from a fast neutral helium beam is investigated in the Madison Symmetric Torus MST R. N. Dexter, D. W. Kerst, T. W. Lovell, S. C. Prager, and J. C. Sprott, Fusion Technol. 19, 131 1991 . Predicted He I line intensities and line ratios from a recently developed collisional-radiative model are compared with experiment. The intensity of singlet lines comes ...
متن کاملMeasurements of electron density and temperature in the H-1 heliac plasma by helium line intensity ratios.
Electron density and temperature distributions in the H-1 heliac plasma are measured using the helium line intensity ratio technique based on a collisional-radiative model. An inversion approach with minimum Fisher regularization is developed to reconstruct the ratios of the local emission radiances from detected line-integrated intensities. The electron density and temperature inferred from th...
متن کاملX - ray photoionized plasma diagnostics with Helium - like ions . Application to Warm Absorber - Emitter in Active
We present He-like line ratios (resonance, intercombination and forbidden lines) for totally and partially photoionized media. For solar plasmas, these line ratios are already widely used for density and temperature diagnostics of coronal (collisional) plasmas. In the case of totally and partially photoionized plasmas, He-like line ratios allow for the determination of the ionization processes ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2009