I’m simulating a cold cathode electron beam and encountering issues with setting an appropriate ΔP value to model a realistic energy spread. When I try smaller ΔP values (e.g., 0.0001), FLUKA doesn’t accept them, but larger values lead to results that don’t match expected physical behavior.
My main questions are:
How can I configure ΔP effectively to achieve a low-energy spread in this context?
Without a Compile tab in Flair, how can I create and compile a custom SOURCE file to define specific beam characteristics? Any guidance on the setup or compilation process would be highly appreciated.
I had no problem defining an electron source as in your example and running it. I ask myself however, what a source with 1.2E-4 GeV/c momentum and a momentum distribution with 1.0E-4 GeV/c FWHM means: this setup must frequently produce electrons with negative momentum (I did not check this).
I also tried other FWHM, down to 1.0E-7, and never had a problem running the input.
Your other question: the compile tab is to the very right of the GUI, hidden under “calculator”. You can drag-drop it to the horizontal menu tabs which are always visible.
I appreciate your help. I managed to compile my source and it works fine with me.
when I use momentum I get plot errors. Perhaps you are right and there is an error in my calculations.
I use energy instead of momentum.
The electric source resample the characteristics of the field emission cathode (e.g. CNT)
