Hi!

I was wondering whether there is a way to get the first Townsend ionisation coefficient (alpha) from the simulations. In the user manual in section 2.5.1 on the drift tube it is stated:

First, we prepare a table of transport parameters (drift velocity, diffusion coefficients, Townsend

coefficient, and attachment coefficient) as a function of the electric field E (and, in general, also

the magnetic field B as well as the angle between E and B).

So it appears that in creating the gas files with gas.GenerateGasTable(ncoll) the Townsend coefficients should be calculated. How can I find these coefficients? I have looked at the gas files but am a bit confused because I did not find this information.

Is there also a way to get the Townsend coefficients for ions (gamma)?

Thank you very much for your help!