Please use this identifier to cite or link to this item: http://arks.princeton.edu/ark:/88435/dsp011g05ff83b
 Title: Novel angular velocity estimation technique for plasma filaments Contributors: Mate, LampertMate, LampertAhmed, DialloStewart, ZwebenU. S. Department of Energy contract number DE-AC02-09CH11466 Issue Date: Dec-2022 Publisher: Princeton Plasma Physics Laboratory, Princeton University Abstract: Data for the figures in text format. Please read the README file for detailed description. URI: http://arks.princeton.edu/ark:/88435/dsp011g05ff83b Referenced By: https://doi.org/10.1063/5.0128818 Appears in Collections: NSTX

Files in This Item:
File Description SizeFormat
fig1ab.txtTwo example consecutive frames of a rotating filament. Each line represents 64 horizontal pixels from the frame, each column represents vertical 80 pixels. Frame #1 and frame #2 are in the same file and contain the data for Fig. 1(a) and Fig. 1(b).37.52 kBText
fig3abcd.txtPre-processing steps for the analysis. Same representation as for Fig. 1. Fig 3 (a,b,c,d) are in the same file in respective order: GPI_SLICED_FULL data (Fig. 3 (a)): Data for Figure 3 (a) GPI_NORMALIZED data (Fig. 3 (b)): Data for Figure 3 (b) GPI_DETREND_VEL data (Fig. 3 (c)): Data for Figure 3 (c) GPI_GAUSS_DIFF data (Fig. 3 (d)): Data for Figure 3 (d)321.38 kBText
fig4a.txtFourier magnitude spectrum of a pre-processed GPI frame. x (pix) is the x coordinate in the Fourier magnitude spectrum. y (pix) is the y coordinate. FFT linear is the Fourier magnitude spectrum. Each line represents a horizontal row of pixels in the x axis while each column represents a vertical column of pixels in the y axis.866.03 kBText
fig4b.txtSame representation as Fig. 4 (a), but for the consecutive frame.865.08 kBText
fig4c.txtLog-polar transformed Fourier magnitude spectrum of the spectrum in Fig. 4 (a). phi (deg) is the polar coordinate in the transformed spectrum. r (pix) is the radial coordinate in the transformed spectrum. FFT logpol: Log-polar Fourier magnitude spectrum. Each line represents a horizontal row of pixels in the polar axis while each column represents a vertical column of pixels in the radial axis.2.55 MBText
fig4d.txtSame representation as Fig. 4 (c), but for the consecutive frame.2.56 MBText
fig5.txtCross-correlation coefficient function calculated between the log-polar transformed Fourier magnitude spectra for the full polar and the [-31,31] radial range. r lag (pix): radial lag coordinate in the CCCF. phi lag (deg): polar lag coordinate in the CCCF 2D CCCF data: 2D spatial cross-correlation coefficient function. Each line represents a horizontal row of pixels in the phi lag axis while each column represents a vertical column of pixels in the r lag axis.876.55 kBText
fig6.txtResults of the cross-correlation threshold assessment for NSTX GPI measurement for shot 141319. Each row represents a point in the time series. The columns represent the time, and the angular velocity estimates for different correlation thresholds from 0.9 to 0.4 with 0.1 increments, respectively.44.05 kBText
fig7.txtSynthetic frames of a normal (Frame #1, Fig. 7 (a)) and a rotated (Frame #2, Fig. 7 (b)) Gaussian-structure. Same representation as in Figure 1.210.75 kBText
fig8.txtRelative uncertainty of the angular rotation estimation vs. angle of rotation and the Gaussian structure size. Angle rotation: rotation in degrees. Size vector: FWHM of the Gaussian structures in pixels. Relative uncertainty: Each row corresponds to a Gaussian size setting. Each column corresponds to an angle of rotation setting.8.9 kBText
fig9.txtRelative uncertainty of the angular rotation estimation vs. angle and elongation. Angle rotation: rotation in degrees Elongation: elongation of the Gaussian-structure. Relative uncertainty: Each row corresponds to a rotation angle setting, each column corresponds to an elongation setting.16.49 kBText
fig10.txtMean and standard deviation of the relative uncertainty vs. angle of rotation and relative noise level. Angle of rotation: angle of rotation in degrees. Relative noise level: relative noise level settings. Mean relative uncertainty of the angular rotation estimation: Each row corresponds to a rotation angle setting, each column corresponds to a relative noise level setting. Data for Fig. 10 (a). Standard deviation of the relative uncertainty of the angular rotation estimation: Each row corresponds to a rotation angle setting, each column corresponds to a relative noise level setting. Data for Fig. 10 (b).30.26 kBText
fig11_484.177ms.txt87.97 kBText
fig11_484.180ms.txt87.23 kBText
fig11_484.182ms.txt88.28 kBText
fig11_484.185ms.txt88.03 kBText
fig11_484.187ms.txt87.68 kBText
fig11_484.190ms.txt87.8 kBText
fig11_484.193ms.txt87.58 kBText
fig11_484.195ms.txt87.73 kBText
fig11_484.198ms.txt87.82 kBText
fig12.txtAngular velocity estimation results for blobs in shot 141307. Time (ms): Time vector in milliseconds. Angular velocity (rad/s): Angular velocity in rad/s.14.78 kBText
fig13_-2.5us.txt89.19 kBText
fig13_-5us.txt88.7 kBText
fig13_-7.5us.txt89.07 kBText
fig13_-10us.txt89.34 kBText
fig13_2.5us.txt88.87 kBText
fig13_5us.txt89.19 kBText
fig13_7.5us.txt89.43 kBText
fig13_10us.txt88.91 kBText
fig13_t_ELM.txt89.1 kBText
fig14.txtAngular velocity estimation results for an ELM filament in shot 141319. Time (ms): Time vector in milliseconds. Angular velocity (rad/s): Angular velocity in rad/s.9.7 kBText
fig15a.txtComparison of the angular velocity estimation techniques for shot 141307. Time CCCF (ms): Time vector in milliseconds for the CCCF technique. Angular velocity CCCF (krad/s): Angular velocity calculated with the CCCF based technique. Time contour (ms): Time vector in milliseconds for the contour technique. Angular velocity contour (krad/s): Angular velocity estimate with the contour based technique. Time watershed (ms): Time vector in milliseconds for the watershed technique. Angular velocity watershed (krad/s):Angular velocity estimate with the watershed based technique.42.74 kBText
fig15b.txtComparison of the angular velocity estimation techniques for shot 141319. Same representation as for Fig. 15 (a).36.22 kBText
README.txtDetailed description of all of the data files.5.11 kBText