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TJ-II:Helium Beam: Difference between revisions
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A Collisional Radiative (CR) model for the line emission intensity ratios is used | A Collisional Radiative (CR) model for the line emission intensity ratios is used | ||
to deduce electron densities and temperatures. | to deduce electron densities and temperatures. | ||
<ref>[http://link.aip.org/link/?RSINAK/75/3478/1 A. Hidalgo et al., ''Multipulse supersonic helium beam diagnostic in the TJ-II stellarator'', Rev. Sci Instrum. '''75''', 3478 (2004)]</ref> | <ref name="Hidalgo">[http://link.aip.org/link/?RSINAK/75/3478/1 A. Hidalgo et al., ''Multipulse supersonic helium beam diagnostic in the TJ-II stellarator'', Rev. Sci Instrum. '''75''', 3478 (2004)]</ref> | ||
<ref name="Guzman">[http://dx.doi.org/10.1016/j.jnucmat.2009.01.290 F. Guzmán et al, ''On the determination of edge Ti profiles by a supersonic He beam in TJ-II'', Journal of Nuclear Materials '''390-391''' (2009) 1127-1130]</ref> | <ref name="Guzman">[http://dx.doi.org/10.1016/j.jnucmat.2009.01.290 F. Guzmán et al, ''On the determination of edge Ti profiles by a supersonic He beam in TJ-II'', Journal of Nuclear Materials '''390-391''' (2009) 1127-1130]</ref> | ||
It provides profiles of the electron temperature and density in the plasma edge at a repetition rate of up to 200 Hz. | It provides profiles of the electron temperature and density in the plasma edge at a repetition rate of up to 200 Hz. | ||
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It is located at φ = 355.3° ([[TJ-II:Sectors|sector]] C8). | It is located at φ = 355.3° ([[TJ-II:Sectors|sector]] C8). | ||
[[File:TJ-II_Helium_beam.png|300px|thumb|right|The TJ-II Helium beam diagnostic. The laser can be crossed with the Helium beam for LiF measurements of the excited He population <ref name=" | [[File:TJ-II_Helium_beam.png|300px|thumb|right|The TJ-II Helium beam diagnostic. The laser can be crossed with the Helium beam for LiF measurements of the excited He population <ref name="Hidalgo" /> and validation of the CR model.]] | ||
== Data description == | == Data description == | ||