2015
DOI: 10.1088/1009-0630/17/12/01
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Q-Band X-Mode Reflectometry and Density Profile Reconstruction

Abstract: By installing an X-mode polarized Q-band (32-56 GHz) reflectometry at the low field side on EAST, the zero density cutoff layer was determined and the edge density profile was measured in normally operating plasmas. A Monte Carlo procedure has been developed to analyze the density profiles by considering the error of time delay measured by reflectometry. By combining this Q-band and previously developed V-and W-band reflectometries, the density profiles from edge to core can be measured in most EAST experiment… Show more

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Cited by 61 publications
(49 citation statements)
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“…The electron density was measured by reflectometry (Refl). [27][28][29] The electron temperature was measured by a Michelson interferometer (MI), 30 a heterodyne radiometer system (HRS), 31 and Thomson scattering (TS). 32 The ion temperature was measured by charge exchange recombination spectroscopy (CXRS).…”
Section: Setup Of the Simulationsmentioning
confidence: 99%
“…The electron density was measured by reflectometry (Refl). [27][28][29] The electron temperature was measured by a Michelson interferometer (MI), 30 a heterodyne radiometer system (HRS), 31 and Thomson scattering (TS). 32 The ion temperature was measured by charge exchange recombination spectroscopy (CXRS).…”
Section: Setup Of the Simulationsmentioning
confidence: 99%
“…The probing frequency at which the signal amplitude's gradient suddenly increases can be interpreted as the FF frequency and the start of the upper cut off plasma reflection. This approach has been used in many different devices such as DIII-D [4], Tore Supra [5], EAST [6]. Amplitude based methods require a high dynamic range of the diagnostic measurement and assume that the plasma reflection signal power is consistently higher than other reflections, such as back wall reflection, spurious noise or lower cut off reflection.…”
Section: Automatic Estimation Of the X-mode First Fringe Frequencymentioning
confidence: 99%
“…where subscript '0' means the value at the magnetic axis, the radial electric field E r can drive the trapped ions to move in the toroidal direction with a velocity v it,ϕ = cE r /B θ [19] . When E r is timedependent, it causes a toroidal acceleration dv it,ϕ /dt = (c/B θ ) • (dE r /dt) which provides an inertia force F in = −m i dv it,ϕ /dt.…”
Section: The Physics Model 21 Neoclassical Polarization Contributionmentioning
confidence: 99%