More on x-rays
Well, photons. The Klein-Nisch formula gives compton (x-rays) and Thompson (lower energy than x-rays) cross-sections for scattering off electrons. Data can also be found for absorption, ionisation, dissociation, Rayleigh/Mie (visible scattering off dust) and Raman (absorption, plus re-emission at another wavelength). This is all photons do. Well, in my model it will be... Plus need to establish the effect of the Sun being an extended source, and see if I can get my photons to curve...
Need differential pdfs from each type of scattering plus total cross-sections.
One run has finished so far. 40eV completed its SD+2 run, was analysed, recoded and set off again without grade changes.
Ok, after a bit of research, it probably won't matter (ok, certainly won't matter) if I keep the backscatter ratio at 0.5 as that is what it is below about 0.2MeV (far more energetic than 1nm). There isn't anything to worry about so far as energy transfer after all, so just need to put compton scattering total cross-section (which I have) into the program as a normal, scattering (incoherent) cross-section. Then, absorption, dissociation and ionisation ones go in as normal. Rayleigh/Mie can't be used as there's no dust in the models, so that just leaves Raman, which has already been stuck in there. Thompson is implictly included through the Compton computation as mentioned above. Ok, I'm ready to rock...
Have scraped together a load of cross-sections for a 1nm grid of x-ray fluxes. Need a few molecular ones, but have compton ones, plus a few photoionisation and absorption ones for elements - enough, at least, to interpolate the rest from.
Have also had another cloudy day at Mill Hill. 100% cloud cover at least...
H3+ profile has come through from Makenzie.
Need differential pdfs from each type of scattering plus total cross-sections.
One run has finished so far. 40eV completed its SD+2 run, was analysed, recoded and set off again without grade changes.
Ok, after a bit of research, it probably won't matter (ok, certainly won't matter) if I keep the backscatter ratio at 0.5 as that is what it is below about 0.2MeV (far more energetic than 1nm). There isn't anything to worry about so far as energy transfer after all, so just need to put compton scattering total cross-section (which I have) into the program as a normal, scattering (incoherent) cross-section. Then, absorption, dissociation and ionisation ones go in as normal. Rayleigh/Mie can't be used as there's no dust in the models, so that just leaves Raman, which has already been stuck in there. Thompson is implictly included through the Compton computation as mentioned above. Ok, I'm ready to rock...
Have scraped together a load of cross-sections for a 1nm grid of x-ray fluxes. Need a few molecular ones, but have compton ones, plus a few photoionisation and absorption ones for elements - enough, at least, to interpolate the rest from.
Have also had another cloudy day at Mill Hill. 100% cloud cover at least...
H3+ profile has come through from Makenzie.
Labels: Cross-sections, Demonstrating, Jupiter, Mill Hill, Photons, X-rays
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