Dear @Piet,
(1 and 2) Here is a schematic drawing of a similar chamber from https://indico.cern.ch/event/426015/contributions/1047606/attachments/906077/1278746/DriftChamber_ICFA2005.pdf. In my case the anode wire is located at x=0 and the drift area is extending in negative x-direction. So it’s basically half a tube with a drift chamber with a constant drift field being the other half.
I will try lower voltages but in the end I have to stick to the said voltages to get comparable results, but I thought about the voltages being an issue as well, because for some events I get errors like this:
DriftLineRKF::IntegrateAlpha:
Cannot retrieve alpha at mid point or end point.
DriftLineRKF::Avalanche:
Cannot retrieve alpha at drift line point 1669, segment 2
DriftLineRKF::Avalanche:
Warning: Integrating the Townsend coefficients would lead to exponential overflow.
Avalanche truncated.
I have read here How is the induction signal calculated in garfield++? that at least the exponential overflow could be caused by the voltages. I don’t know if it could be the gas file, because I checked for the large field strength near the anode wire to be covered. Do you know, where these errors could come from and if it’s ok to have a few of them for one muon event creating about 70-90 drift lines?
(3) I will have a look and see what’s possible for me to do, thank you!