Bits and bobs
Upgrade to titan's IDL install affected to allow running of Solar2000. Now works
Have been thinking again about the suicidal x-ray problem. Suicidal x-rays refer to the effect that an x-ray flux impacting on a neutral atmosphere will have. The atmosphere gets ionised by the impact, creating electrons. Electrons have a similar size to the wavelength of x-rays, which means Compton scattering cross-sections see their peak in the x-ray region. This, in turn means that x-rays get scattered more by the electrons they create. The effect of scattering is that x-rays lose energy and become EUV or less, meaning the x-ray flux kills itself. The chapman function method of calculating this is to apply the cf and have a compton scattering addition to the path length, ignoring the creation of EUV photons and concurrent destruction of x-rays, not to mention the directional effects of the scattering.
Another thought experiment has included space charges created in the aurorae and the currents created by the churning of background electrons to remove it. Though this effect is well known as it causes the induced currents that knock out powerlines and stations in powerful substorms, the heating effect in the upper atmosphere doesn't seem to be as well considered...
Of course, the majority of the work done today was on the Mars model, getting hold of, interpolating and extrapolating NO ionisation cross-sections. That is nitrogen monoxide, not "no" cross-sections... though the feeling did occur...
Saturn5000 slot run of 50eV in SD+2 mode completed. Analysis raised 50eV grade to 2i. Recoded as SD+C and set off again.
Have been thinking again about the suicidal x-ray problem. Suicidal x-rays refer to the effect that an x-ray flux impacting on a neutral atmosphere will have. The atmosphere gets ionised by the impact, creating electrons. Electrons have a similar size to the wavelength of x-rays, which means Compton scattering cross-sections see their peak in the x-ray region. This, in turn means that x-rays get scattered more by the electrons they create. The effect of scattering is that x-rays lose energy and become EUV or less, meaning the x-ray flux kills itself. The chapman function method of calculating this is to apply the cf and have a compton scattering addition to the path length, ignoring the creation of EUV photons and concurrent destruction of x-rays, not to mention the directional effects of the scattering.
Another thought experiment has included space charges created in the aurorae and the currents created by the churning of background electrons to remove it. Though this effect is well known as it causes the induced currents that knock out powerlines and stations in powerful substorms, the heating effect in the upper atmosphere doesn't seem to be as well considered...
Of course, the majority of the work done today was on the Mars model, getting hold of, interpolating and extrapolating NO ionisation cross-sections. That is nitrogen monoxide, not "no" cross-sections... though the feeling did occur...
Saturn5000 slot run of 50eV in SD+2 mode completed. Analysis raised 50eV grade to 2i. Recoded as SD+C and set off again.
Labels: 50eV, Cross-sections, Induced Currents, Mars, Photons, Saturn5000, SD, Sensitivities, X-rays
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