Schematic of the UF-CHERS spectrometer and the APD detector box are shown.
Measured instrument profile from a single spectral channel.
Example signals for L-mode ECH and beam heated discharges (shot # 146351). (a) UF-CHERS peak spectral channel, (left axis) UF-CHERS side spectral channel, (right axis). (b) The 150 L beam power (left axis), and ECH power (right axis).
Line profile from Doppler broadened C VI emission. Δt = 1 μs. Dots show the data after the background subtraction, whereas triangles show the data for background emission.
For an example L-mode discharge, the ion temperature measurements from the UF-CHERS (blue) and the nearby CER chord (black).
The ion temperature measurements profile comparison.
Cross power spectral density for 2-point Ti measurements are shown in solid red. The uncorrelated measurements (noise floor) are shown in blue dashed line.
Measured density fluctuation cross power spectral using the nearby BES channels.
Cross power spectral density measurements of (a) the ion temperature, (b) the line of sight velocity with the adjacent BES channel.
The coherency spectra (a) and the cross-correlation measurements (b) between the ion temperature fluctuations from the UF-CHERS and the density fluctuation measurements from the BES diagnostic as a function of poloidal separation are shown.
Signal-to-noise ratio (a) and the internal gain (b) are measured as a function of the reverse bias voltage.
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