TJ-II:Reflectometry: Difference between revisions

TJ-II:Reflectometry (view source)

408 bytes added , 9 August 2009

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 [[TJ-II]] has an AM reflectometer
 <ref>[http://dx.doi.org/10.1088/0741-3335/43/11/308 T. Estrada et al., Plasma Phys. Control. Fusion '''43''' (2001) 1535–1545]</ref>
-for measuring electron density profiles with a temporal resolution of 2 ms
+for measuring electron density profiles with a temporal resolution of 2 ms.
-(located between [[TJ-II:Sectors|sectors]] A4 and A5).
+Separate antennas are used for launching and receiving the signal. The antennas are located in the equatorial plane of the toroidal cross-section at &phi; = 45º (between [[TJ-II:Sectors|sectors]] A4 and A5), and view the plasma from the low-field side.
+Inside the vacuum vessel, a fundamental wave-guide is used to transmit the signal from the closest port (A4top: &phi; =38.17º, &theta; =90º) to the desired launching location (&phi; = 45º,&theta; = 180º).
 == Fluctuation Reflectometer ==