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TJ-II:Lithium Beam: Difference between revisions
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[ | [[File:Li_beam.jpg|300px|thumb|right|Lithium beam diagnostic setup. For a photo, see [[TJ-II:Helium Beam|Helium Beam]].]] | ||
[ | [[TJ-II]] possesses a Lithium beam diagnostic. | ||
A thermal Li beam source, located at ∼ 80 cm from the observation region, has been used for the reconstruction of the SOL and edge parameters of the plasmas. | A thermal Li beam source, located at ∼ 80 cm from the observation region, has been used for the reconstruction of the SOL and edge parameters of the plasmas. | ||
A 16 channel photomultiplier array allowed the continuous recording of the radial profile of Li* emission. | A 16 channel photomultiplier array allowed the continuous recording of the radial profile of Li* emission. | ||
Detection of the Li* emission up to 8 cm inside the last closed [ | Detection of the Li* emission up to 8 cm inside the last closed [[Flux surface|flux surface]] (corresponding to ''r/a'' < 0.7) was possible. | ||
<ref>[http:// | <ref>[http://link.aip.org/link/?RSINAK/72/602/1 B. Brañas et al., ''Atomic beam diagnostics for characterization of edge plasma in TJ-II stellarator'', Rev. Sci. Instrum. '''72''', 602 (2001)]</ref> | ||
<ref>[http:// | <ref>[http://dx.doi.org/10.1088/0741-3335/43/8/302 F.L. Tabarés et al, ''Edge characteristics and global confinement of electron cyclotron resonance heated plasmas in the TJ-II Stellarator'', Plasma Phys. Control. Fusion '''43''' (2001) 1023-1037]</ref> | ||
<ref>[http:// | <ref>[http://dx.doi.org/10.1016/S0022-3115(00)00490-6 F.L. Tabarés et al, ''Density control and plasma edge characterisation of ECRH heated plasmas in the TJ-II stellarator'', Journal of Nuclear Materials '''290-293''' (2001) 748-752]</ref> | ||
This diagnostic can no longer be used due to the use of Lithium for [ | This diagnostic can no longer be used due to the use of Lithium for [[TJ-II:Plasma Wall Interaction|plasma wall conditioning]], creating an overwhelming amount of Li background emission. | ||
The system is located in [ | The system is located in [[TJ-II:Sectors|sector]] C7. | ||
The signals are stored in the [ | The signals are stored in the [[TJ-II:Shot database|TJ-II database]] with the names 'LITIO1',...,'LITIO16'. | ||
== References == | == References == | ||
<references /> | <references /> | ||