Misalignment study

The idea is to start by defining the algorithms and then to write something simple in C++ with Root output

• define a detection layer just as a 100x100 pads of 1cm2
• - the position of each pad would be:
• xpad = x0 +i*pad_size
• ypad= y0+ j*pad_size
• zpad= z0
• with (x0, y0, z0) the position of the centre of pad in the low corner and i, i the common and row of the pad
• simulate tracks on the first layer
• calculate intersection of tracks with all layers
• find out the hit pads in each layer and set (xhit,yhit, zhit) in each layer to the centre of the pads
• fit the track from (xhit,yhit, zhit)i
• what's the impact of pad_size on the resolution
• what happens if misalignments on x0,y0, z0, or systematic error on pad_size?

Geometry conventions

Instructions for TOMUVOL software

Login

• ssh giammanco@clrhp05.in2p3.fr from CERN domain
• ssh giammanco@clrantsrv.in2p3.fr

Instructions (to be checked for typos):

Concerning the general info you can find on the server, you can find the soft under
/mim/soft/release/
In particular the Mapping is under
geometry/Mapping

The reconstructed tracks are in trees stored under
/mim/reconstruction/15_CDC/