Fig. 1. Experimental configuration schematically showing the target including Au hohlraum, CH capsule, Au cone and the iron backlighter. The gold cone provided a possibility for the backlighter x-rays to pass through a single wall of the shell.

Fig. 2. Power spectra of the measured capsule outer-surface roughness (solid curve) compared with the NIF outer-surface specifications (dashed curve).

Fig. 3. The laser (‘low-foot’) pulse shape used in the experiments for hohlraum drive with a peak power of and total energy of .

Fig. 4. Measured capsule x-ray radiographs captured on a framing camera at a radius of . Images (a) and (b) represent independent image OD modulations obtained by averaging over eight and seven independent images, respectively. Image (c) shows the OD signal and noise obtained by averaging of images (a) and (b), while image (d) shows the OD image of noise obtained using a subtraction of images (a) and (b).

Fig. 5. Measured Fourier amplitudes of OD modulations of signal and noise (solid curve, calculated using the image in Figure 4(c)), and noise (dashed curve, calculated using the image in Figure 4(d)).

Fig. 6. Simulated capsule OD modulations at radius of without the effects of spatial resolution (a) and including the blurring by the spatial resolution of the imaging system (b).

Fig. 7. The calculated lineout of the OTF of the pinhole camera (solid line) using experimental geometrical parameters with 6.7 keV x-rays and the measured lineout of the OTF of the framing camera (dashed curve) including the effects of the experimental magnification of 8.

Fig. 8. Simulated Fourier amplitudes of OD modulations without the effects of spatial resolution (solid curve, calculated using the image in Figure 6(a)) and including the effects of spatial resolution (dashed curve, calculated using the image in Figure 6(b)).

Fig. 9. Measured capsule x-ray radiographs of signal and noise obtained from the image shown in Figure 4(c) including a mask to exclude the fiducial ‘ring’ from the analysis. Image (b) shows the image of noise obtained from the image shown in Figure 4(d) including a mask.

Fig. 10. Measured Fourier amplitudes of OD modulations without the mask (thick solid curve) and with the mask (dashed curve) compared with the simulated OD modulations (thin solid curve).

Fig. 11. Typical OD lineouts of the experimental data (thick solid curve) from Figure 4(c) and simulations (thin solid curve) from Figure 6(b).