Difference between revisions of "LB RunGroupC Vertex"
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||Z Resolution (cm) || 0.05435 | ||Z Resolution (cm) || 0.05435 | ||
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| + | These histograms raise some questions. To begin I created a LUND file with 6 GeV incident electrons at 25 degrees in theta and 0 degrees in phi. All of the vertex positions were set to 0. I then ran GEMC 2.4 using the command line | ||
| + | ~/src/CLAS/GEMC/source/gemc -USE_GUI=0 -INPUT_GEN_FILE="LUND,No_Raster.LUND" -N=75000 eg12_sol_No_Raster.gcard | ||
| + | |||
| + | which created an output file called eg12_sol_75k_No_Raster.ev. After that the reconstruction command line used was | ||
| + | |||
| + | ~/src/CLAS/coatjava-2.4/bin/clas12-reconstruction -i eg12_sol_75k_No_Raster.ev-config GEOM::new=true -config MAG::torus=-1.0 -config MAG::solenoid=1.0 -o eg12_sol_75k_No_Raster_rec.evio -s DCHB:DCTB:EC:FTOF:EB -config DATA::mc=true -config DCTB::useRaster=true | ||
| + | |||
| + | After the reconstruction a root file was created using | ||
| + | |||
| + | ~/src/CLAS/evio2root/bin/evio2root eg12_sol_75k_No_Raster_rec.evio eg12_sol_75k_No_Raster_rec.root 75000 | ||
| + | |||
| + | A plot was then created to show the X Vertex and Y Vertex Differences | ||
| + | |||
| + | [[File:NoRaster Vx YDifference.png|200px]] | ||
| + | |||
| + | The first question is why is there a shift in the Y Difference. What would make X more centered around 0? The next question is when rastering begins, why do the resolutions in the X Vertices remain unchanged while the resolutions in the Y Vertices change? | ||
===Point in 2-D but extended target in 1-D=== | ===Point in 2-D but extended target in 1-D=== | ||
Revision as of 21:26, 11 July 2016
Vertex Reconstruction studies
Inclusive electron GEMC 2.4 & Coatjava 2.4
Summary
Set all histogram ranges to -6,6 cm and bin sizes of 0.1 cm
Point target X,Y,Z=0 cm
| No Rastering | |
|---|---|
| Vx Difference | 
|
| Vy Difference | 
|
| Vz Difference | 
|
| X Resolution (cm) | 0.2362 |
| Y Resolution(cm) | 0.09809 |
| Z Resolution (cm) | 0.05435 |
These histograms raise some questions. To begin I created a LUND file with 6 GeV incident electrons at 25 degrees in theta and 0 degrees in phi. All of the vertex positions were set to 0. I then ran GEMC 2.4 using the command line ~/src/CLAS/GEMC/source/gemc -USE_GUI=0 -INPUT_GEN_FILE="LUND,No_Raster.LUND" -N=75000 eg12_sol_No_Raster.gcard
which created an output file called eg12_sol_75k_No_Raster.ev. After that the reconstruction command line used was
~/src/CLAS/coatjava-2.4/bin/clas12-reconstruction -i eg12_sol_75k_No_Raster.ev-config GEOM::new=true -config MAG::torus=-1.0 -config MAG::solenoid=1.0 -o eg12_sol_75k_No_Raster_rec.evio -s DCHB:DCTB:EC:FTOF:EB -config DATA::mc=true -config DCTB::useRaster=true
After the reconstruction a root file was created using
~/src/CLAS/evio2root/bin/evio2root eg12_sol_75k_No_Raster_rec.evio eg12_sol_75k_No_Raster_rec.root 75000
A plot was then created to show the X Vertex and Y Vertex Differences
The first question is why is there a shift in the Y Difference. What would make X more centered around 0? The next question is when rastering begins, why do the resolutions in the X Vertices remain unchanged while the resolutions in the Y Vertices change?
Point in 2-D but extended target in 1-D
Two vertex variables are fixed at zero and the third vertex variable is altered
| 2cm X Raster, Y=0,Z=0 | 2 cm Y Raster, X=0,Z=0 | 2 cm Z Raster ,X=0,Y=0 | 6 cm Z Raster ,X=0,Y=0 | |
|---|---|---|---|---|
| Vx Difference |  |
 |
 |
|
| Vy Difference |  |
 |
 |
|
| Vz Difference |  |
 |
 |
|
| X Resolution (cm) | 0.2658 | 0.2531 | 0.2544 | 0.2539 |
| Y Resolution(cm) | 0.1728 | 0.2368 | 0.2644 | 0.6191 |
| Z Resolution (cm) | 0.1792 | 0.1998 | 0.4318 | 1.105 |
Extended target -3 < Z < 3 cm
| 1cm X Raster | 1 cm Y Raster | 1 cm X & Y Raster | |
|---|---|---|---|
| X Resolution (cm) | 0.2696 | 0.2588 | 0.2734 |
| Y Resolution (cm) | 0.6234 | 0.6851 | 0.6927 |
| Z Resolution (cm) | 1.136 | 1.361 | 1.381 |
| Generated Vx (cm) |  |
 |
|
| Generated Vy (cm) |  |
 |
|
| Generated Vz (cm) |  |
 |
|
| Reconstructed Vx (cm) |  |
 |
|
| Reconstructed Vy (cm) |  |
 |
|
| Reconstructed Vz (cm) |  |
 |
|
| Vx Difference (cm) |  |
 |
|
| Vy Difference (cm) |  |
 |
|
| Vz Difference (cm) |  |
 |
|
Elastic electron proton GEMC 2.4 & Coatjava 2.4
References
https://clasweb.jlab.org/wiki/index.php/TF_EG12_Vertex#Z_resolution_With_micro-megas