TJ-II:Magnetics: Difference between revisions

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== Rogowski coils ==
== Rogowski coils ==


Two Rogowski coils have been installed in [[TJ-II:Sectors|sectors]] A5 (148.) and B4 (211.). 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.


== Diamagnetic loops ==
== Diamagnetic loops ==
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[[File:TJ-II_Diamagnetic_loop.jpg|200px|thumb|left|TJ-II diamagnetic loop]]
[[File:TJ-II_Diamagnetic_loop.jpg|200px|thumb|left|TJ-II diamagnetic loop]]


Two internal diamagnetic loops are installed at φ = 135º ([[TJ-II:Sectors|sector]] B4) and 225º ([[TJ-II:Sectors|sector]] C4).
Two internal diamagnetic loops are installed at [[TJ-II:Sectors|sector]] B4 (135°) and C4 (225°).
They consist of a main loop which encircles the plasma column
They consist of a main loop which encircles the plasma column
and runs under the protecting tiles in the groove region and a compensating loop which
and runs under the protecting tiles in the groove region and a compensating loop which

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