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TJ-II:Spectroscopy: Difference between revisions
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<ref>[http://www.new.ans.org/pubs/journals/fst/a_1264 B. Zurro et al, ''Comparison of Impurity Poloidal Rotation in ECRH and NBI Discharges of the TJ-II HELIAC'', Fusion Science and Technology '''50''', 3 (2006) 419-427]</ref>. This experimental system has also been used to measure proton rotation using spectral line emission from excited fast neutrals created from inner core plasma protons via charge exchange transfer reactions. <ref>[http://link.aip.org/link/?RSINAK/74/2056/1 B. Zurro et al, ''Investigation of proton rotation measurements using hydrogen line wings in the TJ-II stellarator'', Rev. Sci. Instrum. '''74''' (2003) 2056]</ref> | <ref>[http://www.new.ans.org/pubs/journals/fst/a_1264 B. Zurro et al, ''Comparison of Impurity Poloidal Rotation in ECRH and NBI Discharges of the TJ-II HELIAC'', Fusion Science and Technology '''50''', 3 (2006) 419-427]</ref>. This experimental system has also been used to measure proton rotation using spectral line emission from excited fast neutrals created from inner core plasma protons via charge exchange transfer reactions. <ref>[http://link.aip.org/link/?RSINAK/74/2056/1 B. Zurro et al, ''Investigation of proton rotation measurements using hydrogen line wings in the TJ-II stellarator'', Rev. Sci. Instrum. '''74''' (2003) 2056]</ref> | ||
== | == Toroidal rotation measurement == | ||
[[File:TJ-II McPherson.jpg|300px|thumb|right|Spectroscopy device for toroidal rotation measurement]] | |||
A method for measuring absolutely calibrated toroidal rotation velocities consists of simultaneously recording the emission lines from the plasma and from a calibration lamp by means of a double fiber-fiber guide. | |||
<ref>[http://link.aip.org/link/?RSINAK/77/033506/1 D. Rapisarda et al, ''Novel passive spectroscopy system for absolutely referenced plasma rotation measurements in clean plasmas'', Rev. Sci. Instrum. '''77''' (2006) 033506]</ref> | <ref>[http://link.aip.org/link/?RSINAK/77/033506/1 D. Rapisarda et al, ''Novel passive spectroscopy system for absolutely referenced plasma rotation measurements in clean plasmas'', Rev. Sci. Instrum. '''77''' (2006) 033506]</ref> | ||
The system has been mounted at φ = -9.45° ([[TJ-II:Sectors|sector]] D8) and | |||
φ = 170.56° ([[TJ-II:Sectors|sector]] B8). | |||
== Other techniques == | |||
A vacuum ultraviolet spectrometer is used for performing spectral surveys and specialized plasma studies. | A vacuum ultraviolet spectrometer is used for performing spectral surveys and specialized plasma studies. | ||