Any idea on how to implement a uniform distribution energy spectrum without using weights?

[DarKnight48]

I want to run a toy simulation using a uniform distribution for the energy spectrum to have enough statistical data for the high-energy part. Currently, I can't do this within a reasonable amount of computing time with the built-in Power-law spectrum. I know it can be done using weights, but this is not what I need because I want to reduce the computation time.

It would be great if the possible solution can extend to any kind of distribution of the energy spectrum. Thanks in advance

[lukasmerten]

I am not exactly sure what you are asking for.

There are only two option to model a certain injected spectrum dN/dE \propto E^\alpha: a) Use the build-in power law spectrum of the source class with the correct power law index \alpha b) Use the build-in power law spectrum with a different power law index \beta and apply a reweighting based on the energy at source E_0 and the power law indices \alpha and \beta in your post-processing.

I have no idea how changing the injection of particles could save computation time on a basis of individual simulation runs. So I suggest to like at the time consuming parts of your simulation and try to optimize them.

However, we cannot give any support in this direction.