-- KD, April 02, 2015 -- PLEASE REFER to README.txt for better visibility of sketches.
Simulation of MPGD charge dispersion for various readout structures.
The pad "index" runs from 1 at corner (0,0) in a meander up to 10 at (8,6) with pad-size 2x6 mm^2 Typical center for the charge cloud should be in the center of pad 3: (5,3). Pads 1 - 6 see more or less charge. All other pads left and below (1,3) "see" symmetric distributions.
--How to run the program:-- You can start off with a fresh compilation and it is worth to remove all older shared-object (.so) and dependency (.d) files. Then just start 'root' and execute the macro 'macroRunLoop.C'. Altogether: [~/directory] rm *.d *.so; nice root -l // nice for shared systems root [0] .x macroRunLoop.C
The macro takes as input the parameters given in 'prfinput.dat'. The parameters are 'x0 y0 lx ly stpSzx stpSzy' with x0 = x-center of charge cloud; y0 = y-center of charge cloud; lx = number of steps in x-dir; ly = number of steps in y-dir; stpSzx = step-size in x; stpSzy = step-size in y-dir. Change these numbers as you like. Note, the larger lx and ly the more calculations have to be performed and the more computing time is required. The output is a file (.root) that contains a series of histograms, which are named according to their li (padindex), lx, and ly. For convenience it also shows the pad-coordinates relative to the center of the charge cloud. Each histogram contains the charge "seen" on that particular pad as a function of sampling-time of the electronics.
To-do:
- change the pad-size parameters from integer to double so that it can take on any shape and size we want. This also requires rewriting the loops for pads 1 - 10.