Revision as of 20:32, 30 October 2015

Vertex Reconstruction studies

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

References

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

EG12#Vertex_Studies

@@ Line 3: / Line 3: @@
 =Electron Vertex reconstruction=
-Here are the plots of differences between the simulated x, y, and z vertex positions and the reconstructed vertex positions for a 2cm target. Each histogram corresponds to a difference in the matching coordinate i.e. Simulated Vx - Reconstructed Vx
+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
-Histogram for Vx differences
+gemc -USE_GUI=0 -INPUT_GEN_FILE="LUND, ElasticEvents_FromOrigin.LUND" -N=75000 eg12.gcard
-[[File:eVxDiffCuts_fnl.jpg]]
-Histogram for Vy differences
-[[File:eVyDiffCuts_fnl.jpg]]
-Histogram for Vz differences
-[[File:eVzDiffCuts.jpg]]
-Now I will show the histograms for the difference between the simulated and the reconstructed vertex positions for the proton
-Histogram for Vx differences
-[[File:pVxDiffCuts_fnl.jpg]]
-Histogram for the Vy differences
-[[File:pVyDiffCuts_fnl.jpg]]
-Histogram for the Vz differences
-[[File:pVzDiffCuts.jpg]]
-Now I will attempt to find the phi shift between the vertex position and the detector. First, I created an ev file called eg12_lb_NoSol.ev with GEMC using the command line
-gemc -USE_GUI=0 -INPUT_GEN_FILE="LUND, ElasticEvents_FromOrigin.LUND" -N=7000 eg12.gcard
@@ Line 45: / Line 18: @@
          <detector name="../../../clas12/pcal/pcal"            factory="TEXT" variation="original"/>
         <option name="SCALE_FIELD" value="clas12-torus-big, -1"/>
-       <option name="OUTPUT" value="evio,eg12.ev"/>
+       <option name="OUTPUT" value="evio,eg12_lb_NoSol.ev"/>
 then I ran the reconstruction program using
@@ Line 51: / Line 24: @@
 ~/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
-Once these two evio files have been created, the investigation into the phi shift can begin to be studied by looking at the events in the ced of coatjava. Below I will show a few of the different events for the simulated and the reconstructed particles as seen in the ced.
+After that I used the eg12_lb_NoSol_rec.ev to create the histograms
-Simulated
-[[File:Event2_sim.png]]
-Reconstructed
-[[File:Event2_rec.png]]
-Simulated
-[[File:Event3_sim.png]]
-Reconstructed
-[[File:Event3_rec.png]]
+Here are the histograms when the solenoid is off
 =References=

Difference between revisions of "LB RunGroupC Vertex"

Revision as of 20:32, 30 October 2015

Electron Vertex reconstruction

References

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