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TJ-II:Interferometry: Difference between revisions
→The Microwave interferometer
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[[File:inter.png|250px|thumb|right|Diagram showing the geometry of the microwave interferometer at TJ-II]] | [[File:inter.png|250px|thumb|right|Diagram showing the geometry of the microwave interferometer at TJ-II]] | ||
The diagnostic is located in [[TJ-II:Sectors|sector]] B8. | The diagnostic is located in [[TJ-II:Sectors|sector]] B8 (φ = 264.4°). | ||
The probing beam has an inclination of 18.7° with respect to the vertical and a frequency of 140 GHz, corresponding to a wavelength of λ = 2.14 mm. | The probing beam has an inclination of 18.7° with respect to the vertical and a frequency of 140 GHz, corresponding to a wavelength of λ = 2.14 mm. | ||
The line-integrated electron density is deduced from the cumulative phase change of the probing beam and the theoretical length of the intersection of the probing beam with the plasma (obtained from the [[TJ-II:Magnetic coordinates|magnetic geometry]] in vacuum). | The line-integrated electron density is deduced from the cumulative phase change of the probing beam and the theoretical length of the intersection of the probing beam with the plasma (obtained from the [[TJ-II:Magnetic coordinates|magnetic geometry]] in vacuum). | ||