Comments (8)
Thanks for your kind words, greatly appreciated!
Concerning your request: I have actually done that in a lecture I gave 2 month ago and I wanted to add that to the plot-script here. I will have a close look at your code and compare it with my code over the next days (somewhat busy these days, sorry) and then come back to you here - I'm curious to see if there are any difference :)
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Well, I've just realized that I have already added that to the fusion_reactivity plot :)
Is that what you were looking for?
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hi @alfkoehn thanks for reaching out!
This is indeed what I was looking for 😄 I had similar results for pp cross sections (waaayy lower than DD, DT...). Shall I start a PR to add this to fusion_cross_sections.py ?
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hi @RemDelaporteMathurin, sorry for my extremely late answer! Isn't this what you are looking for: https://github.com/alfkoehn/fusion_plots/tree/master/fusion_reactivity , i.e. in my understanding your suggestion is already part of the package?
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hi @alfkoehn , no probs
You are right it is included in fusion_reactiviy, but not in cross sections (which are a bit different). I know that the pp cross section would be way lower, but maybe users could have the possibility to add it.
It's a nice comparison sometimes required to show why we cannot simply burn H-H plasmas
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Ah, you're right of course. I'm just wondering now why I haven't included them... will look into it and comment here as soon as I have added them.
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I'm just wondering now why I haven't included them..
One reason might be that the pp cross section is so low, it would squish all the curves and we wouldn't see anything. But that's the point in a way. I find it useful to say: "this is the cross sections of DD DT etc. Why don't we use HH? well here it is, down below"
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I was also looking for the pp cross section, but according to:
Adelberger, E.G., et al.., 1998. Solar fusion cross sections. Rev. Mod. Phys. 70, 1265–1291. https://doi.org/10/ftx3j3
However, the rate for the fundamental p + p -> 2D + e+ + nu_e reaction is too small to be measured in the laboratory. Instead, the cross section for the p-p reaction must be calculated from standard weak-interaction theory.
And indeed I didn't manage to find experimental values for p-p in any paper. I didn't try to make it from the analytical expression presented in the paper.
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