Until you provide an analysis that uses correct data, you haven't proven anything.
While arguing that the sun emits electromagnetic radiation in many bands, including x-rays, he tried to resolve his inability to determine the flux distribution by wavelength by insinuating the sun emits in all x-ray wavelengths equally. But his own data doesn't show that. He gives us a graph that shows two overlapping wavelength bands, with clearly different deposition energies. And the
higher energy x-rays have the
lowest deposition. He can't even read his own graphs properly.
And when asked to show whether Groves' whopping 8 million electron volts had any relevance to actual measured solar radiation, he waves his hands about "interpolation" without showing what he interpolated or why that was a valid method. The highest energy photon those spacecraft measures is just under 25 keV; the lowest is 1.5 keV. How either of those values is supposed to relate to an "interpolation" involving 8 MeV is something I'd love to see him show his work on.
At 25 keV (hard solar x-rays, such as during a solar flare), the attenuation coefficient for aluminum is just over 0.3 mm
-1. That means each successively inner millimeter of aluminum attenuates roughly a third of the hard x-rays that are passed on to it by the preceding millimeter. For a quiescent sun, typically around 15 keV prevalent, the attenuation coefficient is around 0.85. So a solitary millimeter of aluminum stops 9 out of every 10 x-ray photons that hit it. Romulus' graph is somewhat misleading in that it gives the values as the attenuation coefficient
μ normalized by the material's mass density,
ρ. That captures the notion that thickness has to take into account whether the material is compressed or expanded in any way.
We sometimes use very thin layers of aluminum as attenuators in x-ray applications. For diagnostic x-rays, ca. 80 keV, attenuation coefficients are small enough that you can use aluminum filters to slightly reduce the x-ray strength. And thicknesses of aluminum are used over high-energy x-ray detectors to weed out the slower photons and keep them from saturating the detector. That way we can get accurate measurements of specific narrow bands of hard solar x-rays.
