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TJ-II:Magnetics: Difference between revisions
→Mirnov coils
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* One straight array in [[TJ-II:Sectors|sector]] C4, at ''φ'' = 308°. | * One straight array in [[TJ-II:Sectors|sector]] C4, at ''φ'' = 308°. | ||
* One poloidal array with 15 coils measuring the poloidal field component. This array is located between [[TJ-II:Sectors|sectors]] D4 and D5, at ''φ'' = 45°. The signals in the [[TJ-II:Shot database|TJ-II database]] corresponding to these coils are called 'MID5Px', where 'x' is the coil number. This array has been enhanced by 10 additional coils (5 at each end). | * One poloidal array with 15 coils measuring the poloidal field component. This array is located between [[TJ-II:Sectors|sectors]] D4 and D5, at ''φ'' = 45°. The signals in the [[TJ-II:Shot database|TJ-II database]] corresponding to these coils are called 'MID5Px', where 'x' is the coil number. This array has been enhanced by 10 additional coils (5 at each end). | ||
* Two toroidal arrays (installed 2018) | * Two toroidal arrays (installed 2018) <ref>E. Ascasíbar et al., ''Measurements of magnetic field fluctuations in TJ-II plasmas with new in-vessel helical arrays of magnetic coils'', [[doi:10.1063/5.0102037|Rev. Sci. Instrum. '''93''' (2022) 093508]]</ref> | ||
== Rogowski coils == | == Rogowski coils == | ||
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Two Rogowski coils have been installed in [[TJ-II:Sectors|sectors]] A5 (148.7°) and B4 (211.3°). Since the coils have to surround the plasma column completely, they are located under the protecting tiles of the groove that runs toroidally all along the [[TJ-II:Vacuum system|vacuum vessel]]. For this purpose, 2 mm deep channels were machined on the vacuum side of the groove, at the above mentioned poloidal cross sections, in order to allow enough space for the coils. | Two Rogowski coils have been installed in [[TJ-II:Sectors|sectors]] A5 (148.7°) and B4 (211.3°). Since the coils have to surround the plasma column completely, they are located under the protecting tiles of the groove that runs toroidally all along the [[TJ-II:Vacuum system|vacuum vessel]]. For this purpose, 2 mm deep channels were machined on the vacuum side of the groove, at the above mentioned poloidal cross sections, in order to allow enough space for the coils. | ||
The signals 'Ip_a5_' and 'Ip_b4_' in the [[TJ-II:Shot database|TJ-II database]] provide the corresponding measurements of the net plasma current. | The signals 'Ip_a5_' and 'Ip_b4_' in the [[TJ-II:Shot database|TJ-II database]] provide the corresponding measurements of the net plasma current (in kA). | ||
== Diamagnetic loops == | == Diamagnetic loops == | ||
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measures only the vacuum magnetic flux. | measures only the vacuum magnetic flux. | ||
The signals 'W_a5_corr_' and 'W_b4_corr_' in the [[TJ-II:Shot database|TJ-II database]] return the energy content of the plasma, based on the diamagnetic loop in [[TJ-II:Sectors|sectors]] A5 and B4, corrected for the net plasma current. | The signals 'W_a5_corr_' and 'W_b4_corr_' in the [[TJ-II:Shot database|TJ-II database]] return the energy content of the plasma (in kJ), based on the diamagnetic loop in [[TJ-II:Sectors|sectors]] A5 and B4, corrected for the net plasma current. | ||
== References == | == References == | ||
<references /> | <references /> | ||