LB RunGroupC Vertex

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Vertex Reconstruction studies

Reconstruction Efficiencies

Simulation commands

Solenoid Off

~/src/CLAS/GEMC/source/gemc -USE_GUI=0 -SPREAD_V="(0.1, 10)cm" -N=100 eg12_nosol_noLUND.gcard

~/src/CLAS/coatjava-2.4/bin/clas12-reconstruction -i eg12_nosol_75k_noLUND.ev -config GEOM::new=true -config MAG::torus=-1.0 -config MAG::solenoid=0.0 -o temp.evio -s DCHB:DCTB:EC:FTOF:EB -config DATA::mc=true

Solenoid On

~/src/CLAS/GEMC/source/gemc -USE_GUI=0 -SPREAD_V="(0.1, 10)cm" -N=100 eg12_sol_noLUND.gcard

~/src/CLAS/coatjava-2.4/bin/clas12-reconstruction -i eg12_nosol_75k_noLUND.ev -config GEOM::new=true -config MAG::torus=-1.0 -config MAG::solenoid=1.0 -o temp.evio -s DCHB:DCTB:EC:FTOF:EB -config DATA::mc=true


Sweet spot

TS_RunGroupC#Sweet_spot Below is the command line I used for GEMC

gemc -USE_GUI=0 -HALL_MATERIAL="Vacuum" , -N=75000 eg12_nosol1.gcard

Here is the gcard

<gcard> 

      <detector name="../../../../clas12/fc/forwardCarriage" factory="TEXT" variation="original"/>
      <detector name="../../../../clas12/dc/dc"            factory="TEXT" variation="original"/>
      <detector name="../../../../clas12/ec/ec"            factory="TEXT" variation="original"/>
      <detector name="../../../../clas12/ctof/ctof"            factory="TEXT" variation="original"/>
      <detector name="../../../../clas12/ftof/ftof"            factory="TEXT" variation="original"/>
      <detector name="../../../../clas12/htcc/htcc"            factory="TEXT" variation="original"/>
      <detector name="../../../../clas12/pcal/pcal"            factory="TEXT" variation="javageom"/>
      <option name="SCALE_FIELD" value="clas12-torus-big, -1"/>
     <option name="OUTPUT" value="evio,eg12_nosol_1.ev"/>
     <option name="BEAM_P" value="e-, 6.0*GeV, 25.0*deg, 0*deg"/>
     <option name="SPREAD_P" value="4.0*GeV, 0*deg, 0*deg"/>

</gcard>

Here is the reconstruction command

~/src/CLAS/coatjava-1.0/bin/clas12-reconstruction -s FMT:DCHB:DCTB:FTOF:EC:EB -config DCTB::useRaster=true -config MAG::solenoid=0 -i eg12_nosol_1.ev -o eg12_nosol_1_rec.ev


Below is the command and the gcard used for when the solenoid was on 

gemc -USE_GUI=0 -HALL_MATERIAL="Vacuum" , -N=100000 eg12_sol1.gcard

<gcard> 

       <detector name="../../../../../clas12/fc/forwardCarriage" factory="TEXT" variation="original"/>
       <detector name="../../../../../clas12/dc/dc"            factory="TEXT" variation="original"/>
       <detector name="../../../../../clas12/ec/ec"            factory="TEXT" variation="original"/>
       <detector name="../../../../../clas12/ctof/ctof"            factory="TEXT" variation="original"/>
       <detector name="../../../../../clas12/ftof/ftof"            factory="TEXT" variation="original"/>
       <detector name="../../../../../clas12/htcc/htcc"            factory="TEXT" variation="original"/>
       <detector name="../../../../../clas12/pcal/pcal"            factory="TEXT" variation="javageom"/>
       <option name="SCALE_FIELD" value="clas12-torus-big, -1"/>
       <option name="HALL_FIELD"  value="clas12-solenoid"/>
       <option name="OUTPUT" value="evio,eg12_sol_1.ev"/>
       <option name="BEAM_P" value="e-, 6.0*GeV, 25.0*deg, 0*deg"/>
       <option name="SPREAD_P" value="4.0*GeV, 0*deg, 0*deg"/>

</gcard>

~/src/CLAS/coatjava-1.0/bin/clas12-reconstruction -s FMT:DCHB:DCTB:FTOF:EC:EB -config MAG::fields=nominal -config DATA::mc=true -i eg12_sol_1.ev -o eg12_sol_1_rec.evio

Below are the reconstructed events with the solenoid on and off for 1k events

Rec theta 1k.png

Rec Theta Sol 1k.png


Rec phi nosol 1k.png


Rec phi sol 1k.png

Raster in Z

Since the LUND files are not currently operating correctly, I will use a different method to raster in Z. I will use the GEMC command line to reduce the radius of the target to 0 cm and randomly place vertex positions along Z (like a line target). The command line for GEMC is shown below along with the gcard

~/src/CLAS/GEMC/source/gemc -USE_GUI=0 -SPREAD_V="(0.0, 3)cm" -N=100 eg12_nosol_noLUND.gcard


<gcard> 

      <detector name="../../clas12/fc/forwardCarriage" factory="TEXT" variation="original"/>
      <detector name="../../clas12/dc/dc"            factory="TEXT" variation="ccdb"/>
      <detector name="../../clas12/ec/ec"            factory="TEXT" variation="original"/>
      <detector name="../../clas12/ctof/ctof"            factory="TEXT" variation="original"/>
      <detector name="../../clas12/ftof/ftof"            factory="TEXT" variation="java"/>
      <detector name="../../clas12/htcc/htcc"            factory="TEXT" variation="original"/>
      <detector name="../../clas12/pcal/pcal"            factory="TEXT" variation="javageom"/>
      <option name="SCALE_FIELD" value="clas12-torus-big, -1"/>
     <option name="OUTPUT" value="evio,eg12_nosol_75k_noLUND.ev"/>
     <option name="BEAM_P" value="e-, 6.0*GeV, 25.0*deg, 0*deg"/>
     <option name="SPREAD_P" value="4.0*GeV, 0*deg, 0*deg"/>

</gcard>

and here is the reconstruction command line ~/src/CLAS/coatjava-2.4/bin/clas12-reconstruction -i eg12_nosol_75k_noLUND.ev -config GEOM::new=true -config MAG::torus=-1.0 -config MAG::solenoid=0.0 -o eg12_nosol_75k_noLUND_rec.ev -s DCHB:DCTB:EC:FTOF:EB -config DATA::mc=true

Below are the differences between the generated and reconstructed angles for 75k events:

PhiDifference75kZraster.png

ThetaDifference75kZraster.png

Raster in X

Raster in Y

Raster in X & Y Zis zero

Below is the command line used for rastering in X and Y while leaving the z-component of the vertex at 0:

~/src/CLAS/GEMC/source/gemc -USE_GUI=0 -SPREAD_V="(0.5, 0)cm" -N=75000 eg12_nosol_noLUND.gcard

and here is the reconstruction command line

~/src/CLAS/coatjava-2.4/bin/clas12-reconstruction -i eg12_nosol_75k_noLUND_xyraster.ev -config GEOM::new=true -config MAG::torus=-1.0 -config MAG::solenoid=0.0 -o eg12_nosol_75k_noLUND_xyraster_rec.evio -s DCHB:DCTB:EC:FTOF:EB -config DATA::mc=true

Below are the differences between the reconstructed and the generated angles for rastering 1cm in XY:

ThetaDifferenceXYRaster.png

Electron Vertex reconstruction

I have created histograms of the z-vertex resolutions for both the proton and the electron using elastic events from the origin. I used the gemc command line to output a file called eg12_lb_NoSol.ev

gemc -USE_GUI=0 -INPUT_GEN_FILE="LUND, ElasticEvents_FromOrigin.LUND" -N=75000 eg12.gcard


My gcard looks like this 

      <detector name="../../../../clas12/fc/forwardCarriage" factory="TEXT" variation="original"/>
      <detector name="../../../../clas12/dc/dc"            factory="TEXT" variation="original"/>      
      <detector name="../../../../clas12/ec/ec"            factory="TEXT" variation="original"/>
      <detector name="../../../../clas12/ctof/ctof"            factory="TEXT" variation="original"/>
      <detector name="../../../../clas12/ftof/ftof"            factory="TEXT" variation="original"/>
      <detector name="../../../../clas12/htcc/htcc"            factory="TEXT" variation="original"/>
       <detector name="../../../clas12/pcal/pcal"            factory="TEXT" variation="original"/>
      <option name="SCALE_FIELD" value="clas12-torus-big, -1"/>
     <option name="OUTPUT" value="evio,eg12_lb_NoSol.ev"/>

then I ran the reconstruction program using

~/src/CLAS/coatjava/bin/clas12-reconstruction -s FMT:DCHB:DCTB:FTOF:EC:EB -config DCTB::useRaster=true -config MAG::solenoid=0 -i eg12_lb_NoSol.ev -o eg12_lb_NoSol_rec.ev

After that I used the eg12_lb_NoSol_rec.ev to create the histograms

Here are the histograms when the solenoid is off

Z Vertex NoSol.png

Then I ran the GEMC simulation with the solenoid on. My gcard was

<gcard> 

      <detector name="../../clas12/fc/forwardCarriage" factory="TEXT" variation="original"/>
      <detector name="../../clas12/dc/dc"            factory="TEXT" variation="original"/>
      <detector name="../../clas12/ec/ec"            factory="TEXT" variation="original"/>
      <detector name="../../clas12/ctof/ctof"            factory="TEXT" variation="original"/>
      <detector name="../../clas12/ftof/ftof"            factory="TEXT" variation="original"/>
      <detector name="../../clas12/htcc/htcc"            factory="TEXT" variation="original"/>
      <detector name="../../clas12/pcal/pcal"            factory="TEXT" variation="original"/>



      <option name="SCALE_FIELD" value="clas12-torus-big, -1"/>
      <option name="HALL_FIELD"  value="clas12-solenoid"/>
     <option name="OUTPUT" value="evio, eg12_lb_Sol.ev"/>


</gcard>


Which gives the output file eg12_lb_Sol.ev. I used the GEMC command line

gemc -USE_GUI=0 -INPUT_GEN_FILE="LUND, ElasticEvents_FromOrigin.LUND" -N=75000 eg12_Sol.gcard

Then I made the reconstructed file, eg12_lb_Sol_rec.ev using the command line

~/src/CLAS/coatjava//bin/clas12-reconstruction -s FMT:DCHB:DCTB:FTOF:EC:EB -config MAG::fields=nominal -i eg12_Sol.ev -o eg12_lb_Sol_rec.ev

The histogram is below

Z Vertex Sol.png


Now I will get more simulated events and use the java geometry for the pcal and the LUND file Vertex0.075k_10-40.dat and investigate the Z vertex resolution using different radius cuts.

References

https://clasweb.jlab.org/wiki/index.php/TF_EG12_Vertex#Z_resolution_With_micro-megas

EG12#Vertex_Studies

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