Active volume does not reach the cathode
In the current ICARUS geometry, the active volume of TPCs ends about 0.56 centimetres away from the cathode.
This causes Geant4 not to deposit any energy in that volume. This gap should be verified and fixed is needed.
(see also SBND issue #18056)
#5 Updated by Gianluca Petrillo about 1 month ago
- Status changed from New to Rejected
I have drawn the energy deposition coordinates from two cosmic ray events generated yesterday. Geometry is with single first induction wires.
The energy depositions are split in in-active-volume and "other".
I observe a gap of 1.5 mm at the cathode position for the in-active-volume.
Tracks are clearly visible, and for a few of them there are aligned energy deposits from the "other" in that gap.
The relevant plot, zoomed in the interesting region, will be attached, if Redmine decides to allow me to.
In the GDML description, cathode is 1.5 mm thick. From my point of view everything is ok at geometry and GEANT4 simulation level.