TJ-II:Spectroscopy: Difference between revisions

TJ-II:Spectroscopy (view source)

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 == Other techniques ==
-A vacuum ultraviolet spectrometer is used for performing spectral surveys and specialized plasma studies.
+A vacuum ultraviolet spectrometer has been operated on TJ-II since 1999. It is an f/10.4 1 m normal-incidence vacuum spectrometer equipped with interchangeable 1200 and 3600 lines mm<sup>-1</sup> gratings and a back-illuminated CCD camera with 400 x 1340 pixels (20 x 20 &mu;m<sup>2</sup>). The instrument covers the wavelength range from ~20 to ~300 nm. It has been used to perform spectral surveys (identify and follow the evolution of plasma impurities), to obtain impurity ion temperatures, and to perform specialized studies (e.g. study fast oxygen ions present in plasmas during the neutral beam injection heating phase.
-<ref>[http://link.aip.org/link/?RSINAK/70/312/1 K.J. McCarthy et al, ''A toroidal focusing mirror based vacuum ultraviolet diagnostic for TJ-II'', Rev. Sci. Instrum. '''70''' (1999) 312]</ref>
+<ref>K. J. McCarthy, B. Zurro, R. Balbín, A. Baciero, J. Herranz, and I. Pastor, Europhys. Lett. 63 (2003) 49</ref>
-<ref>[http://link.aip.org/link/?APCPCS/1058/219/1 K.J. McCarthy et al, ''A Study of Spectral Lines in Plasmas Heated by Neutral Beam Injection in the TJ-II Stellarator'', AIP Conf. Proc. '''1058''' (2008) 219-221]</ref>
+<ref>K. J. McCarthy, M. A. Ochando, F. Medina, B. Zurro, C. Hidalgo, M. A. Pedrosa, I. Pastor, J. Herranz and A. Baciero, Fusion Sci. & Tech. 46, 129-134 (2004)</ref>
+<ref>K. J. McCarthy, V. Tribaldos, J. Arévalo, and M. Liniers, J. Physics B: Atomic, Molecular and Optical Physics 43 (2010) 144020</ref>
-The chord-integrated emissions of spectral lines are  monitored by using a spectral system with time and space scanning capabilities and relative calibration over the entire UV-visible spectral range. This system has been used to study the line ratio of lines of different ionization stages of carbon C<sup>5+</sup> 5290 &Aring; and C<sup>4+</sup> 2271 &Aring; for plasma diagnostic purposes.
+The TJ-II is also equipped with a multi-channel spectroscopic and compact diagnostic neutral beam injector system optimized for performing Charge Exchange Recombination Spectroscopy. It permits localized measurements of the impurity ion temperature as well as poloidal and toroidal velocity at 12 positions across the plasma minor radius. For this, the system is set-up to observe the 529.06 nm line emission of C<sup>+5</sup>.
-<ref>[http://link.aip.org/link/?RSINAK/79/10F540/1 B. Zurro et al, ''An experimental system for spectral line ratio measurements in the TJ-II stellarator'', Rev. Sci. Instrum. '''79''' (2008) 10F540]</ref>
+<ref>J.M. Carmona, K.J. McCarthy, V. Tribaldos, R. Balbín, Fusion Sci. Tech. 54, 962-969 (2008)</ref>
+<ref>J.M. Carmona, K.J. McCarthy, V. Tribaldos, R. Balbín, Fusion Sci. Tech. 54, 962-969 (2008)</ref>
+<ref>J. M. Carmona, K. J. McCarthy, R. Balbín, S. Petrov, Rev. Sci. Instrum. 77, 10F107 (2006)</ref>
 == References ==
 <references />