Difference between revisions of "SoLID Software Detector Simulation"

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(Created 06/05/14(Zwzhao), Last modified 04/06/20(Zwzhao))
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= Introduction =
SoLID detector simulation program "solid_gemc" is based on "GEMC 2.x" with additional hit process routine and outputs for all detector systems in SoLID.
It's located SoLID repository https://jlabsvn.jlab.org/svnroot/solid/solid_gemc2 with source codes and detector configuration, field, scripts etc.
You need both the jlab framework and SoLID repository before you can compile and run solid_gemc, refer to the [[Solid_Software#quick_start|quick start]] section
The "set_solid" script is used to setup env
= general note (Please read this!) =
''' [https://hallaweb.jlab.org/wiki/index.php/Detector_simulation_general_note general note] for geometry, materiel, mirror, hit processing, calling gemc as library with added functionally etc'''
= Setup plot =
They are stored here
sort by "Last modified" to see latest
= compile and run =
Once you complete the setup procedure, you can now compile "solid_gemc"
source your set_solid if you haven't done so
scons OPT=1
(then go to a clean terminal and source your set_solid so that "solid_gemc" can found in default PATH)
solid_gemc    (a empty graphic window with simulation setup should show up and confirm it's working, then you can move on full or subsystem simulation)
= full simulation =
All subsystems have their own "production" version directories "ec,hgc,lgc,gem,mrpc,spd,magnet,baffle,target,beamline,absorber" at
Run full SoLID simulation in graphic mode with all subsystems together by
source your set_solid
cd $SoLID_GEMC/script
solid_gemc solid_PVDIS_LD2_full.gcard
solid_gemc solid_SIDIS_He3_full.gcard
solid_gemc solid_SIDIS_NH3_full.gcard
solid_gemc solid_JPsi_LH2_full.gcard
= subsystem simulation =
"solid_gemc" can be used for individual sub-detector systems and the whole detector simulation.
Each of sub-detector systems can do simulation independently and ready to merge it back into the whole system simulation.
They are considered "devel" version and located in their individual directories and person responsible as below
https://jlabsvn.jlab.org/svnroot/solid/subsystem/ec/ec_segmented_solid_gemc and https://jlabsvn.jlab.org/svnroot/solid/subsystem/ec/analysis/readme   
https://jlabsvn.jlab.org/svnroot/solid/subsystem/hgc/hgc_solid_gemc and  https://jlabsvn.jlab.org/svnroot/solid/subsystem/hgc/analysis/readme   
https://jlabsvn.jlab.org/svnroot/solid/subsystem/lgc/lgc_solid_gemc and  https://jlabsvn.jlab.org/svnroot/solid/subsystem/lgc/analysis/readme                             
https://jlabsvn.jlab.org/svnroot/solid/subsystem/gem/gem_solid_gemc and  https://jlabsvn.jlab.org/svnroot/solid/subsystem/gem/analysis/readme             
https://jlabsvn.jlab.org/svnroot/solid/subsystem/mrpc/mrpc_solid_gemc and  https://jlabsvn.jlab.org/svnroot/solid/subsystem/mrpc/analysis/readme               
https://jlabsvn.jlab.org/svnroot/solid/subsystem/spd/spd_solid_gemc and  https://jlabsvn.jlab.org/svnroot/solid/subsystem/spd/analysis/readme   
These directories should be kept clean so it only has files necessary for simulation, and ready to copy into the "production" area to be used with other subsystems
For all other files, please put them into other directories under the same subsystems.
Please refer to "hgc_solid_gemc" and "hgc" as an example
Once you think your subsystem devel version is ready, before making it a production version, be sure to test it with full simulation, meaning it has no conflict with any other production subsystem.
copy, paste and modify "$SoLID_GEMC/script/solid_*_full.gcard" to mix your devel version system and other production subsystems to test
After verify no conflict, you may release it as production version by copying ONLY necessary files like all perl script and txt files without any change into its production directory.
= analyzing result =
== example ==
The root tree output can be analysis by some very simple scripts here
== header tree and generated tree ==
header tree and generated tree are direct passing through from input, either particle gun or lund file produced by a generator, referring to [https://eic.jlab.org/wiki/index.php/Detector_simulation_general_note#input]
For generator used for SoLID, "eicRate" and "halld" both use header defined here https://hallaweb.jlab.org/wiki/index.php/Solid_eventgenerator#Output_file
== flux tree ==
detector ID for flux hit processing
We use built-in flux hit processing for virtual planes near to real detectors to record particles entering or leaving real detectors
Each virtual plane has a unique id to identify it  and it appears in the "id" branch of "flux" tree
Its ID is defined by 7 digits integer like "abcdefg"
a: detector
    GEM 1, CC 2, EC 3, MRPC 4, SPD 5, muon 6
b: sub-detector
    GEM 1 - 6 layer, LGCC 1, HGCC 2, FAEC 1, LAEC 2, MRPC 1, FASPD 1, LASPD 2, muon forward 1, muon endcap donut 2,muon barrel 3
c: subsub-detector
    GEM 1, CC 1 front, MRPC 1 front,SPD 1 front,EC 1 front 4 rear
d,e,f,g: not used for now
for example, 3110000 is for forward angle EC front plane
see code example here https://jlabsvn.jlab.org/svnroot/solid/study/background/background.C
= field map =
= old way to run simulation, mainly for background study =
== geometry ==
refer to file " $SoLID_GEMC/geometry/changelog" for details
source your set_solid
cd $SoLID_GEMC/geometry
edit perl files to modify geometry, then run command below to generate new geometry txt files
./solid_PVDIS_simple.pl config_solid_PVDIS_simple.dat
./solid_PVDIS_LD2.pl config_solid_PVDIS_LD2.dat
./solid_SIDIS_He3_simple.pl config_solid_SIDIS_He3_simple.dat
./solid_SIDIS_He3.pl config_solid_SIDIS_He3.dat
./solid_SIDIS_NH3_simple.pl config_solid_SIDIS_NH3_simple.dat
./solid_SIDIS_NH3.pl config_solid_SIDIS_NH3.dat
== materials ==
source your set_solid
cd $SoLID_GEMC/geometry
edit the perl file "solid_material.pl" to modify geometry, then run command below to generate new material txt files
./solid_material.pl config_solid_PVDIS_simple.dat
./solid_material.pl config_solid_PVDIS_LD2.dat
./solid_material.pl config_solid_SIDIS_He3_simple.dat
./solid_material.pl config_solid_SIDIS_He3.dat
./solid_material.pl config_solid_SIDIS_NH3_simple.dat
./solid_material.pl config_solid_SIDIS_NH3.dat

Latest revision as of 18:44, 3 December 2020