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Geometry for tiles in front of EMC
https://forum.gsi.de/index.phpindex.php?t=rview&goto=10845&th=2877#msg_10845
We would like to create a geometry for the new tile hodoscope
derived from the EMC geometry. The plan is to have a small
scintillator tile of 2x2x0.5 cm^3 in front of each EMC crystal.
The distance to the front face is still open. It can be between
0 and 2 cm depending on which other services are needed
on the crystal front face.
Is there an easy way to extrapolate a geometry like this from
the existing EMC geometry? Or do we have to create all tiles
separately from a large set of numbers?
Thanks for the help.
Best regards,
Lars
]]>Lars Schmitt2010-07-02T11:34:24-00:00Re: Geometry for tiles in front of EMC
https://forum.gsi.de/index.phpindex.php?t=rview&goto=10846&th=2877#msg_10846
something similar was done by Chris Strackbein in Giessen, to include APDs after the barrel EMC.
In his case, he has looped inside the barrel emc geometry file (emc_module12.dat), taken back the geo trap parameters and then he has written a new file (apd_module12.dat) changing the params such as position and thickness, and leaving the rest.
Considering that the barrel geometry is written as ASCII, I think it should be not so difficult to write a macro which takes the values, performs the useful geometrical transformations, and then rewrites the new geo. Maybe you could try to contact him directly, or ask Volker/Reiner (I am not sure if he reads the forum).]]>StefanoSpataro2010-07-02T11:47:03-00:00Re: Geometry for tiles in front of EMC
https://forum.gsi.de/index.phpindex.php?t=rview&goto=10869&th=2877#msg_10869
Thanks for the reply. On your initiative I received now from
Björn from Gießen the script, that Chris has once written.
This looks very helpful. I attach it here for future reference.
Now one question I have to you and the EMC people is the
following: Has the APD volume (apd_module12.dat) been implemented
in any way in the actually used geometry? I did not find anything
pointing to this. Even if the geometry description exists I see no
code which would make use of it to implement it as a real detector
or at least material. But maybe I am just blind.
Or does one have to follow the lines in which emc_module12.dat and
other geometries are really implemented?
Many thanks for the help.
Yours,
Lars
]]>Lars Schmitt2010-07-15T11:58:57-00:00Re: Geometry for tiles in front of EMC
https://forum.gsi.de/index.phpindex.php?t=rview&goto=10870&th=2877#msg_10870
Implementation of APD as real detector is in /emc/EmcMC/PndEmcApd.cxx class.
The task which sum energy over APD and produce PndEmcApdHit
is /emc/EmcDigi/PndEmcApdHitProducer.cxx
The macros which perform simulations are:
/macro/emc/dedicated/sim_emc_apd.C (I have just updated it rev.9415 since the trunk version didn't work)
/macro/emc/dedicated/hit_emc_apd.C
and /macro/emc/dedicated/reco_apd.C
Best regards,
Dima]]>Dima Melnychuk2010-07-15T12:14:58-00:00