(Color online) Time traces showing plasma current and neutral beam injected power (a), and (b), ion temperature (c), electron temperature (d), toroidal velocity (e), and line-averaged electron density (f). Time of interest for later analysis shown between dashed vertical lines.
(Color online) Profiles showing ion and electron temperature, red curve and black curve, respectively (a), electron density (b), and angular toroidal rotation frequency (c).
(Color online) Equilibrium reconstruction (a), with enlarged view showing locations of BES channels for seven repeated discharges used in this study (b). Power spectra for three radial locations in scan (c).
(Color online) Two pair time-lag correlations. Auto-correlation (black square), cross correlation of poloidally separated channels (red diamond), cross-correlation of radially separate channels (green circle). The envelope of each is denoted by the dashed lines.
(Color online) (a) 2D correlation function constructed from multiple two-pair correlations at with a common reference channel at . Gray crosses indicate center of measurement (a). (b) Image is minimum curvature spline from data above. Contour lines represent fitted model function. Closely separated lines indicate the uncertainty.
(Color online) 1D slices of 2D correlation function in radial and vertical directions at increasing separations, as indicated, where reference channel is at .
(Color online) (a) Turbulence profile showing radially and frequency resolved spectrogram, where boxes indicate peak of spectrum and crosses indicate centroid, (b) integrated density fluctuation levels, (c) normalize poloidal wavenumber spectrum, (d) velocity calculated via radial force balance (black lines), turbulence group velocity (red points), and diamagnetic velocity (dash-dot-dash), and (e) Hahm-Burrell shear rate (black lines) and turbulence decorrelation rate (red points), where the shaded area indicates limited sensitivity.
(Color online) Poloidal wavenumber-resolved power spectra at (a) and (b) .
(Color online) GAM fluctuation spectrum profile (a), levels for GAM component (b), and seven frequency spectra over the radial extent of the GAM (c).
(Color online) Point spread functions (top row) and raw 2D Correlation function fits (bottom row) at r/a = 0.5 [(a) and (e)], [(b) and (f)], [(c) and (g)], and r/a = 0.85 [(d) and (h)].
(Color online) Raw (top row) and compensated (bottom row) 2D wavenumber functions. Gray regions indicate regions outside of measurement sensitivity, estimated as 15% level of STF at [(a) and (e)], [(b) and (f)], [(c) and (g)], and [(d) and (h)].
(Color online) 1D slices of raw (black lines) and compensated (red/gray lines) 2D wavenumber spectra that pass through the maximum of the raw 2D spectrum, which is indicated by the horizontal and vertical lines in Fig. 10.
(Color online) Raw and compensated: radial correlation length (a), poloidal correlation length (b), and tilt angle (c). Dashed lines in (a) and (b) are factors (9.0 and 12.2, respectively) of .
(Color online) Frequency resolved spectra from BES (red/gray) and GYRO with synthetic BES diagnostic applied (black lines) at (a) and (b) . [Reprinted with permission from C. Holland et al., Phys. Plasmas 16, 052301 (2009). Copyright © 2010, American Institute of Physics.]
(Color online) Density fluctuation correlation functions via GYRO simulations at [(a) and (c)] and [(b) and (d)] for the raw output [(a) and (b)] and with the synthetic BES diagnostic applied [(c) and (d)].
(Color online) Comparison of 2D wavenumber structure via GYRO simulations (black lines) and BES measurements (red/gray lines) at [(a) and (c)] and [(b) and (d)].
(Color online) Maximum linear growth rates calculated from TGLF, and region of peak wavenumber spectra as measured with BES (shaded area).
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