I’m currently trying to simulate a TPC which has concentrically placed wires inside a grounded tube. From what I can see this corresponds to the D2 type symmetry in the Garfield++ documentation. I have tried to use the SetPeriodicityPhi class, but this did not work. I’ve just recently started working with Garfield, I would be very grateful if any of you could guide me in this regard. Thanks a lot!
I think @hschindl can most probably help you solving your issue
I think you have two options to model your layout:
(1) You can work in Cartesian coordinates, create a (cylindrical) tube, and then place each of the wires separately inside the tube (you cannot exploit phi-periodicity in this case).
(2) You can use polar coordinates. Then you can create an equipotential plane at constant radius (i. e your tube), add a wire, and set the phi periodicity.
I’ve attached a little example that illustrates the two solutions.
polar.C (1.3 KB)
Thank you so much. This helped a lot! So I had a further question regarding this, can I use the sensor.SetArea function with the second setup? My searches showed a manual showing a call Polar_to_Cartesian function. This being a Fortran function, I was wondering if I could achieve something similar in Garfield++ or if I should just add the the wires manually in Cartesian.
Again Thank you so much for your help!
Yes, you can still set a drift region (box) in the sensor using SetArea, irrespective of the coordinate system you are using in the ComponentAnalyticField class.
Thank you so much for your help!
This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.