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Journal Articles

Characterization of the JT-60U divertor plasma region during the formation of a strong radiation

Koubiti, M.*; Nakano, Tomohide; Capes, H.*; Marandet, Y.*; Mekkaoui, A.*; Mouret, L.*; Rosato, J.*; Stamm, R.*

Contributions to Plasma Physics, 52(5-6), p.455 - 459, 2012/06

https://doi.org/10.1002/ctpp.201210033
 Times Cited Count：4 Percentile：17.72(Physics, Fluids & Plasmas)

The spectral profile of C IV ($$n$$=6-7) measured from the strong radiation zone (X-point MARFE) in a detached plasma of JT-60U with a high resolution spectrometer was analyzed by PPP code. In the previous analysis, a spectral profile calculated by the PPP code with an input of single pair of electron density and temperature was compared to the measured spectral profile. It was found that the spectral profiles measured around the X-point MARFE were reproduced with the calculated spectral profile but the ones measured at the center of the X-point MARFE were not. In the present analysis, two spectral profiles were calculated with two pairs of electron density and temperature and were summed up, leading to successful reproduction of the measured spectral profile. The two pairs of electron density and temperature used for the calculation were 1$$times$$10$$^{20}$$ m$$^{-3}$$ and 23.0 eV, and 6$$times$$10$$^{20}$$ m$$^{-3}$$ and 2.5 eV, respectively, with a mixture ratio of 65:35.

Journal Articles

Diagnostics of tokamak divertor plasmas by Stark broadening of impurity emission lines

Koubiti, M.*; Nakano, Tomohide; Capes, H.*; Marandet, Y.*; Mouret, L.*; Rosato, J.*; Stamm, R.*

Proceedings of 37th European Physical Society Conference on Plasma Physics (EPS 2010) (CD-ROM), 4 Pages, 2010/06

http://ocs.ciemat.es/EPS2010PAP/pdf/P5.116.pdf

The C IV ($$n$$ = 6-7) spectral lines emitted from the JT-60U detachedplasmas were observed with a high-wavelength resolution spectrometer and theprofiles were analyzed with a PPP code. The analysis indicates that thespectral profiles were broadened with both the Doppler and the Starkeffects. From these effects, the electron temperature and density wereevaluated. Along the viewing chord for the X-point, the electron temperatureand density was determined to be 3 eV and 7$$times$$10$$^{20}$$m$$^{-3}$$, respectively. These are similar to those determined from the intensity ratioof C IV lines (6.3 eV and 7.8 $$times$$ 10$$^{20}$$ m$$^{-3}$$, respectively). The high density plasma around the X-point was confirmed withthese independent methods.

Journal Articles

Investigation of C IV line broadening mechanisms for plasma diagnostics in magnetic fusion devices

Koubiti, M.*; Nakano, Tomohide; Capes, H.*; Ferri, S.*; Godbert-Mouret, L.*; Marandet, Y.*; Rosato, J.*; Stamm, R.*

Journal of Nuclear Materials, 390-391, p.1142 - 1144, 2009/06

https://doi.org/10.1016/j.jnucmat.2009.01.271
 Times Cited Count：3 Percentile：24.52(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Broadening of lithium-like carbon spectral lines emitted in tokamak plasmas

Koubiti, M.*; Nakano, Tomohide; Capes, H.*; Marandet, Y.*; Mouret, L.*; Rosato, J.*; Stamm, R.*

Europhysics Conference Abstracts (CD-ROM), 31F, 4 Pages, 2007/00

http://epsppd.epfl.ch/Warsaw/pdf/P2_128.pdf

no abstracts in English

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