|
|
Line 453: |
Line 453: |
| |- | | |- |
| ||[-0.1,0.0] || 0.1503 +/- 0.0021 || [[File:VyDiff--0.1,0.0- 30DegRot.png|200px]] || *** || [0.0,0.1] || 0.2052 +/- 0.0033 || [[File:VyDiff-0.0,0.1- 30DegRot.png|200px]] | | ||[-0.1,0.0] || 0.1503 +/- 0.0021 || [[File:VyDiff--0.1,0.0- 30DegRot.png|200px]] || *** || [0.0,0.1] || 0.2052 +/- 0.0033 || [[File:VyDiff-0.0,0.1- 30DegRot.png|200px]] |
| + | |- |
| + | |}<br> |
| + | |
| + | |
| + | Below are the histograms for a 2cm Y target with an incident electron energy of 6 GeV. The angles were theta = 25 degrees and phi = 210 degrees |
| + | |
| + | |
| + | {|border="5" |
| + | || GenPart.x || GenPart.y || GenPart.z || Event.x || Event.y || Event.z |
| + | |- |
| + | || || || || || || |
| + | |- |
| + | |}<br> |
| + | |
| + | {|border="5" |
| + | ||Interval || Resolution (cm) || Vy Difference || *** || Interval || Resolution (cm) || Vy Difference |
| + | |- |
| + | ||[-1.0,-0.9] || || || *** || [0.9,1.0] || || |
| + | |- |
| + | ||[-0.9,-0.8] || || || *** || [0.8,0.9] || || |
| + | |- |
| + | ||[-0.8,-0.7] || || || *** || [0.7,0.8] || || |
| + | |- |
| + | ||[-0.7,-0.6] || || || *** || [0.6,0.7] || || |
| + | |- |
| + | ||[-0.6,-0.5] || || || *** || [0.5,0.6] || || |
| + | |- |
| + | ||[-0.5,-0.4] || || || *** || [0.4,0.5] || || |
| + | |- |
| + | ||[-0.4,-0.3] || || || *** || [0.3,0.4] || || |
| + | |- |
| + | ||[-0.3,-0.2] || || || *** || [0.2,0.3] || || |
| + | |- |
| + | ||[-0.2,-0.1] || || || *** || [0.1,0.2] || || |
| + | |- |
| + | ||[-0.1,0.0] || || || *** || [0.0,0.1] || || |
| |- | | |- |
| |}<br> | | |}<br> |
Vertex Reconstruction studies
Inclusive electron GEMC 2.4 & Coatjava 2.4
LB_GEMC2.4CJ2.4_Vertex
Summary
Set all histogram ranges to -6,6 cm and bin sizes of 0.1 cm
Point target X,Y,Z=0 cm
Below are examples of the reconstruction for several line targets as seen in the CED
We should change it to +30,150,210, and 330 degrees so the electron is not going in between two drift chambers but rather into the center, keep 90 and 270.
6cm Z Target, No Rotation |
6cm Z Target, 270 Degree Rotation |
6cm Z Target, 90 Degree Rotation |
2cm Y Target, 30 Degree Rotation |
2cm Y Target, 180 Degree Rotation |
2cm X Target, 90 Degree Rotation |
2cm X Target, 270 Degree Rotation
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The histograms below are using a 6 GeV electron fired at an angles of 25 degrees in theta and 0 degrees in phi.
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No Rastering
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Vx Difference |
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Vy Difference |
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Vz Difference |
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X Resolution (cm) |
0.2362 +/- 0.0008
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Y Resolution(cm) |
0.09809 +/- 0.00033
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Z Resolution (cm) |
0.05435 +/- 0.00017
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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
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. A 6 GeV electron was fired at angles of 25 degrees in theta and 0 degrees in phi.
|
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
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Vx Difference |
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Vy Difference |
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Vz Difference |
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|
X Resolution (cm) |
0.2658 +/- 0.0010 |
0.2531 +/- 0.0009 |
0.2544 +/- 0.0009 |
0.2539 +/- 0.0009
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Y Resolution(cm) |
0.1728 +/- 0.0007 |
0.2368 +/- 0.0007 |
0.2644 +/- 0.0007 |
0.6191 +/- 0.0013
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Z Resolution (cm) |
0.1792 +/- 0.0006 |
0.1998 +/- 0.0004 |
0.4318 +/- 0.0009 |
1.105 +/- 0.002
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Extended target -3 < Z < 3 cm
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1cm X Raster |
1 cm Y Raster |
1 cm X & Y Raster
|
X Resolution (cm) |
0.2696 +/- 0.0009 |
0.2588 +/- 0.0009 |
0.2734 +/- 0.0009
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Y Resolution (cm) |
0.6234 +/- 0.0014 |
0.6851 +/- 0.0014 |
0.6927 +/- 0.0013
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Z Resolution (cm) |
1.136 +/- 0.002 |
1.361 +/- 0.002 |
1.381 +/- 0.003
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Generated Vx (cm) |
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Generated Vy (cm) |
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Generated Vz (cm) |
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Reconstructed Vx (cm) |
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Reconstructed Vy (cm) |
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Reconstructed Vz (cm) |
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Vx Difference (cm) |
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Vy Difference (cm) |
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Vz Difference (cm) |
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Extended target in Z. Vy shift analysis
All Histograms below were created by simply making the target longer along the Z axis. Each case uses vertex points for X and Y ranging from -1cm to 1cm
|
0.5cm Z Target |
1cm Z Target |
2cm Z Target |
3cm Z Target |
4cm Z Target |
5cm Z Target
|
X Resolution (cm) |
0.2705 +/- 0.0010 |
0.2726 +/- 0.0010 |
0.2716 +/- 0.0010 |
0.2731 +/- 0.0010 |
0.2702 +/- 0.0009 |
0.2736 +/- 0.0010
|
Y Resolution (cm) |
0.2041 +/- 0.0010 |
0.2282 +/- 0.0011 |
0.3152 +/- 0.0014 |
0.433 +/- 0.002 |
0.5584 +/- 0.0018 |
0.6454 +/- 0.0015
|
Z Resolution (cm) |
0.28 +/-0.00 |
0.3582 +/- 0.0013 |
0.5659 +/- 0.0018 |
0.7927 +/- 0.0023 |
1.034 +/- 0.003 |
1.253 +/-0.003
|
X Mean (cm) |
0.0139 +/- 0.001 |
0.0139 +/- 0.00107 |
0.01436 +/- 0.00104 |
0.01217 +/- 0.00107 |
0.00991 +/- 0.00104 |
0.009022 +/- 0.00105
|
Y Mean (cm) |
-0.1893 +/- 0.0011 |
-0.2004 +/- 0.0012 |
-0.2379 +/- 0.0016 |
-0.2936 +/- 0.0022 |
-0.3648 +/- 0.0027 |
-0.3871 +/- 0.0026
|
Z Mean (cm) |
0.0928 +/- 0.0014 |
0.06464 +/- 0.0013 |
-0.0337 +/- 0.0028 |
-0.1582 +/- 0.0040 |
-0.3016 +/- 0.0053 |
-0.486 +/- 0.006
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Generated Vx (cm) |
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Generated Vy (cm) |
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Generated Vz (cm) |
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Reconstructed Vx (cm) |
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Reconstructed Vy (cm) |
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Reconstructed Vz (cm) |
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Vx Difference (cm) |
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Vy Difference (cm) |
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Vz Difference (cm) |
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It would seem that increasing the length of the target in the Z direction has an effect on the resolution of the Y vertex position along with how far the center of the Gaussian peak will shift for the Y vertex differences.
Localized Vertex Resolution Investigation of Line Targets
GEMC was ran to create electrons being produced in a line along certain axes. These include three separate 2cm targets centered at (0,0,0) in the X, Y , and Z directions. The final target is a line along the Z axis centered at (0,0,0) that is 6cm long. The generated electrons were shot at 25 degrees in theta and 0 degrees in phi at an energy of 6GeV.
Here is an example of how the cuts were made. Consider the case of a 2cm line target in the Z direction centered at (0,0,0). Closed intervals begin at the end of the target and are 0.1cm long. So the first interval would be [-1.0,-0.9], then the next would be [-0.9, -0.8] and so on until the entire target is covered. The events in the EVENTHB bank were cut so that in any given interval there would be a margin of +/- 1cm to remove any outliers that may cause the histograms to have long tails.
Below are the histograms for the 2cm line target in Y,X=0,Z=0. The electrons were fired with an energy of 6 GeV at 25 degrees in theta at 0 degrees in phi.
GenPart.x |
GenPart.y |
GenPart.z |
Event.x |
Event.y |
Event.z
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|
Interval |
Resolution (cm) |
Vy Difference |
*** |
Interval |
Resolution (cm) |
Vy Difference
|
[-1.0,-0.9] |
0.09406 +/- 0.00128 |
|
*** |
[0.9,1.0] |
0.1001 +/- 0.0016 |
|
[-0.9,-0.8] |
0.0868 +/- 0.0013 |
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*** |
[0.8,0.9] |
0.1221 +/- 0.0018 |
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[-0.8,-0.7] |
0.08961 +/- 0.00128 |
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*** |
[0.7,0.8] |
0.1144 +/- 0.0017 |
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[-0.7,-0.6] |
0.09853 +/- 0.00148 |
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*** |
[0.6,0.7] |
0.169 +/- 0.003 |
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[-0.6,-0.5] |
0.1038 +/- 0.0016 |
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*** |
[0.5,0.6] |
0.171 +/- 0.003 |
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[-0.5,-0.4] |
0.1202 +/- 0.0018 |
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*** |
[0.4,0.5] |
0.1105 +/- 0.0016 |
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[-0.4,-0.3] |
0.1755 +/- 0.0026 |
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*** |
[0.3,0.4] |
0.09508 +/- 0.00137 |
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[-0.3,-0.2] |
0.1847 +/- 0.0028 |
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*** |
[0.2,0.3] |
0.09065 +/- 0.0140 |
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[-0.2,-0.1] |
0.1255 +/- 0.0019 |
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*** |
[0.1,0.2] |
0.093002 +/- 0.0013 |
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[-0.1,0.0] |
0.09663 +/- 0.00160 |
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*** |
[0.0,0.1] |
0.09008 +/- 0.0012 |
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Below are the histograms for a 2cm target along the Y axis, X = 0 Z = 0. The electrons were fired with an energy of 6 GeV at 25 degrees in theta and 180 degrees in phi.
GenPart.x |
GenPart.y |
GenPart.z |
Event.x |
Event.y |
Event.z
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|
Interval |
Resolution (cm) |
Vy Difference |
*** |
Interval |
Resolution (cm) |
Vy Difference
|
[-1.0,-0.9] |
0.07741 +/- 0.00166 |
|
*** |
[0.9,1.0] |
0.2319 +/- 0.0189 |
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[-0.9,-0.8] |
0.0976 +/- 0.0017 |
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*** |
[0.8,0.9] |
0.2147 +/- 0.0185 |
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[-0.8,-0.7] |
0.09924 +/- 0.00150 |
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*** |
[0.7,0.8] |
0.2364 +/- 0.0188 |
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[-0.7,-0.6] |
0.1386 +/- 0.0024 |
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*** |
[0.6,0.7] |
0.2323 +/- 0.0189 |
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[-0.6,-0.5] |
0.1278 +/- 0.0027 |
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*** |
[0.5,0.6] |
0.06016 +/- 0.00299 |
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[-0.5,-0.4] |
0.09882 +/- 0.00142 |
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*** |
[0.4,0.5] |
0.3986 +/- 0.00104 |
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[-0.4,-0.3] |
0.09322 +/- 0.0013 |
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*** |
[0.3,0.4] |
0.3056 +/- 0.0047 |
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[-0.3,-0.2] |
0.09399 +/- 0.00145 |
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*** |
[0.2,0.3] |
0.1097 +/- 0.0029 |
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[-0.2,-0.1] |
0.08935 +/- 0.00131 |
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*** |
[0.1,0.2] |
0.1146 +/- 0.0025 |
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[-0.1,0.0] |
0.08913 +/- 0.00130 |
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*** |
[0.0,0.1] |
0.09557 +/- 0.0015 |
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Below are the Histograms for a 2cm long target in the X Direction with a 6GeV electron fired at 25 degrees in theta and 90 degrees in phi
GenPart.x |
GenPart.y |
GenPart.z |
Event.x |
Event.y |
Event.z
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|
Interval |
Resolution (cm) |
Vx Difference |
*** |
Interval |
Resolution (cm) |
Vx Difference
|
[-1.0,-0.9] |
0.1341 +/- 0.0140 |
|
*** |
[0.9,1.0] |
0.01572 +/- 0.0002 |
|
[-0.9,-0.8] |
0.1304 +/- 0.0051 |
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*** |
[0.8,0.9] |
0.01844 +/- 0.00031 |
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[-0.8,-0.7] |
0.1182 +/- 0.0036 |
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*** |
[0.7,0.8] |
0.01722 +/- 0.0028 |
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[-0.7,-0.6] |
0.09062 +/- 0.0031 |
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*** |
[0.6,0.7] |
0.02386 +/- 0.00088 |
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[-0.6,-0.5] |
0.06816 +/- 0.00191 |
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*** |
[0.5,0.6] |
0.024 +/- 0.001 |
|
[-0.5,-0.4] |
n/a |
|
*** |
[0.4,0.5] |
0.04406 +/- 0.00182 |
|
[-0.4,-0.3] |
0.0635 +/- 0.0013 |
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*** |
[0.3,0.4] |
0.04517 +/- 0.00118 |
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[-0.3,-0.2] |
0.0618 +/- 0.0012 |
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*** |
[0.2,0.3] |
0.04722 +/- 0.00107 |
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[-0.2,-0.1] |
0.07473 +/- 0.00178 |
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*** |
[0.1,0.2] |
0.05667 +/- 0.00106 |
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[-0.1,0.0] |
0.08787 +/- 0.00132 |
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*** |
[0.0,0.1] |
0.08356 +/- 0.00159 |
|
Below are the Vx Differences using a 2cm target in X with incident 6 GeV electrons at 25 degrees in theta and 270 degrees in phi
GenPart.x |
GenPart.y |
GenPart.z |
Event.x |
Event.y |
Event.z
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Interval |
Resolution (cm) |
Vx Difference |
*** |
Interval |
Resolution (cm) |
Vx Difference
|
[-1.0,-0.9] |
0.01571 +/- 0.0002 |
|
*** |
[0.9,1.0] |
0.1257 +/- 0.0100 |
|
[-0.9,-0.8] |
0.0163 +/- 0.0003 |
|
*** |
[0.8,0.9] |
0.112 +/- 0.004 |
|
[-0.8,-0.7] |
0.01821 +/- 0.0003 |
|
*** |
[0.7,0.8] |
0.1162 +/- 0.0034 |
|
[-0.7,-0.6] |
0.03065 +/- .000163 |
|
*** |
[0.6,0.7] |
0.08958 +/- 0.00316 |
|
[-0.6,-0.5] |
0.02109 +/- 0.00217 |
|
*** |
[0.5,0.6] |
0.07347 +/- 0.00210 |
|
[-0.5,-0.4] |
0.03772 +/- 0.00133 |
|
*** |
[0.4,0.5] |
0.07271 +/- 0.00159 |
|
[-0.4,-0.3] |
0.04817 +/- 0.00125 |
|
*** |
[0.3,0.4] |
0.06196 +/- 0.00146 |
|
[-0.3,-0.2] |
0.05154 +/- 0.00113 |
|
*** |
[0.2,0.3] |
0.06087 +/- 0.00114 |
|
[-0.2,-0.1] |
0.05677 +/- 0.00106 |
|
*** |
[0.1,0.2] |
0.07298 +/- 0.00149 |
|
[-0.1,0.0] |
0.08348 +/- 0.00144 |
|
*** |
[0.0,0.1] |
0.09017 +/- 0.00128 |
|
Below are the histograms for a 6cm target in the Z direction using a 6 GeV electron fired at 25 degrees in theta and 0 degrees in phi.
GenPart.x |
GenPart.y |
GenPart.z |
Event.x |
Event.y |
Event.z
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|
Interval |
Resolution (cm) |
Vz Difference |
*** |
Interval |
Resolution (cm) |
Vz Difference
|
[-3.0,-2.5] |
0.1427 +/- 0.0009 |
|
*** |
[2.5,3.0] |
0.1467 +/- 0.0008 |
|
[-2.5,-2.0] |
0.1412 +/- 0.0008 |
|
*** |
[2.0,2.5] |
0.1419 +/- 0.0009 |
|
[-2.0,-1.5] |
0.1365 +/- 0.0007 |
|
*** |
[1.5,2.0] |
0.1372 +/- 0.0008 |
|
[-1.5,-1.0] |
0.1439 +/- 0.0008 |
|
*** |
[1.0,1.5] |
0.1394 +/- 0.0008 |
|
[-1.0,-0.5] |
0.1429 +/- 0.0008 |
|
*** |
[0.5,1.0] |
0.1584 +/- 0.0010 |
|
[-0.5,0.0] |
0.1332 +/- 0.0007 |
|
*** |
[0.0,0.5] |
0.1378 +/- 0.0009 |
|
Below are the histograms for a 6cm target in the Z direction using a 6 GeV electron fired at 25 degrees in theta and 90 degrees in phi.
GenPart.x |
GenPart.y |
GenPart.z |
Event.x |
Event.y |
Event.z
|
|
|
|
|
|
|
Interval |
Resolution (cm) |
Vz Difference |
*** |
Interval |
Resolution (cm) |
Vz Difference
|
[-3.0,-2.5] |
0.1192 +/- 0.0005 |
|
*** |
[2.5,3.0] |
0.1211 +/- 0.0005 |
|
[-2.5,-2.0] |
0.1205 +/- 0.0005 |
|
*** |
[2.0,2.5] |
0.1251 +/- 0.0005 |
|
[-2.0,-1.5] |
0.122 +/- 0.001 |
|
*** |
[1.5,2.0] |
0.1312 +/- 0.0006 |
|
[-1.5,-1.0] |
0.1249 +/- 0.0006 |
|
*** |
[1.0,1.5] |
0.1233 +/- 0.0005 |
|
[-1.0,-0.5] |
0.1278 +/- 0.0006 |
|
*** |
[0.5,1.0] |
0.1254 +/- 0.0005 |
|
[-0.5,0.0] |
0.1289 +/- 0.0006 |
|
*** |
[0.0,0.5] |
0.1237 +/- 0.0005 |
|
Below are the histograms for a 6 GeV electron fired at angles 25 degrees in theta and 270 degrees in phi.
GenPart.x |
GenPart.y |
GenPart.z |
Event.x |
Event.y |
Event.z
|
|
|
|
|
|
|
Interval |
Resolution (cm) |
Vz Difference |
*** |
Interval |
Resolution (cm) |
Vz Difference
|
[-3.0,-2.5] |
0.1171 +/- 0.0008 |
|
*** |
[2.5,3.0] |
0.1186 +/- 0.0008 |
|
[-2.5,-2.0] |
0.1162 +/- 0.0008 |
|
*** |
[2.0,2.5] |
0.1226 +/- 0.0009 |
|
[-2.0,-1.5] |
0.1207 +/- 0.0009 |
|
*** |
[1.5,2.0] |
0.1317 +/- 0.0010 |
|
[-1.5,-1.0] |
0.1294 +/- 0.0010 |
|
*** |
[1.0,1.5] |
0.1239 +/- 0.0009 |
|
[-1.0,-0.5] |
0.131 +/- 0.001 |
|
*** |
[0.5,1.0] |
0.1256 +/- 0.0009 |
|
[-0.5,0.0] |
0.131 +/- 0.001 |
|
*** |
[0.0,0.5] |
0.1261 +/- 0.0010 |
|
Below are the histograms for a 6 GeV electron fired at 25 degrees in theta and 30 degrees in phi. The target is 2cm long on the Y axis.
GenPart.x |
GenPart.y |
GenPart.z |
Event.x |
Event.y |
Event.z
|
|
|
|
|
|
|
Interval |
Resolution (cm) |
Vy Difference |
*** |
Interval |
Resolution (cm) |
Vy Difference
|
[-1.0,-0.9] |
0.09406 +/- 0.00128 |
|
*** |
[0.9,1.0] |
0.1001 +/- 0.0016 |
|
[-0.9,-0.8] |
0.0868 +/- 0.0013 |
|
*** |
[0.8,0.9] |
0.1221 +/- 0.0018 |
|
[-0.8,-0.7] |
0.08961 +/- 0.00128 |
|
*** |
[0.7,0.8] |
0.1144 +/- 0.0017 |
|
[-0.7,-0.6] |
0.09853 +/- 0.00148 |
|
*** |
[0.6,0.7] |
0.169 +/- 0.003 |
|
[-0.6,-0.5] |
0.1038 +/- 0.0016 |
|
*** |
[0.5,0.6] |
0.171 +/- 0.003 |
|
[-0.5,-0.4] |
0.1202 +/- 0.0018 |
|
*** |
[0.4,0.5] |
0.1105 +/- 0.0016 |
|
[-0.4,-0.3] |
0.1755 +/- 0.0026 |
|
*** |
[0.3,0.4] |
0.09508 +/- 0.00137 |
|
[-0.3,-0.2] |
0.1847 +/- 0.0028 |
|
*** |
[0.2,0.3] |
0.09065 +/- 0.0140 |
|
[-0.2,-0.1] |
0.1255 +/- 0.0019 |
|
*** |
[0.1,0.2] |
0.093002 +/- 0.0013 |
|
[-0.1,0.0] |
0.09663 +/- 0.00160 |
|
*** |
[0.0,0.1] |
0.09008 +/- 0.0012 |
|
Below are the histograms for a 2cm target along the Y axis, X = 0 Z = 0. The electrons were fired with an energy of 6 GeV at 25 degrees in theta and 30 degrees in phi.
GenPart.x |
GenPart.y |
GenPart.z |
Event.x |
Event.y |
Event.z
|
|
|
|
|
|
|
Interval |
Resolution (cm) |
Vy Difference |
*** |
Interval |
Resolution (cm) |
Vy Difference
|
[-1.0,-0.9] |
0.069 +/- 0.002 |
|
*** |
[0.9,1.0] |
0.04936 +/- 0.00068 |
|
[-0.9,-0.8] |
0.08185 +/- 0.00218 |
|
*** |
[0.8,0.9] |
0.05797 +/- 0.00094 |
|
[-0.8,-0.7] |
0.08764 +/- 0.00212 |
|
*** |
[0.7,0.8] |
0.05896 +/- 0.00086 |
|
[-0.7,-0.6] |
0.09158 +/- 0.00258 |
|
*** |
[0.6,0.7] |
0.05895 +/- 0.00091 |
|
[-0.6,-0.5] |
0.07913 +/- 0.00166 |
|
*** |
[0.5,0.6] |
0.05943 +/- 0.00096 |
|
[-0.5,-0.4] |
0.0774 +/- 0.0014 |
|
*** |
[0.4,0.5] |
0.06227 +/- 0.00118 |
|
[-0.4,-0.3] |
0.07978 +/- 0.00157 |
|
*** |
[0.3,0.4] |
0.08115 +/- 0.00186 |
|
[-0.3,-0.2] |
0.08193 +/- 0.00235 |
|
*** |
[0.2,0.3] |
0.01028 +/- 0.0029 |
|
[-0.2,-0.1] |
0.1812 +/- 0.0025 |
|
*** |
[0.1,0.2] |
0.136 +/- 0.003 |
|
[-0.1,0.0] |
0.1503 +/- 0.0021 |
|
*** |
[0.0,0.1] |
0.2052 +/- 0.0033 |
|
Below are the histograms for a 2cm Y target with an incident electron energy of 6 GeV. The angles were theta = 25 degrees and phi = 210 degrees
GenPart.x |
GenPart.y |
GenPart.z |
Event.x |
Event.y |
Event.z
|
|
|
|
|
|
|
Interval |
Resolution (cm) |
Vy Difference |
*** |
Interval |
Resolution (cm) |
Vy Difference
|
[-1.0,-0.9] |
|
|
*** |
[0.9,1.0] |
|
|
[-0.9,-0.8] |
|
|
*** |
[0.8,0.9] |
|
|
[-0.8,-0.7] |
|
|
*** |
[0.7,0.8] |
|
|
[-0.7,-0.6] |
|
|
*** |
[0.6,0.7] |
|
|
[-0.6,-0.5] |
|
|
*** |
[0.5,0.6] |
|
|
[-0.5,-0.4] |
|
|
*** |
[0.4,0.5] |
|
|
[-0.4,-0.3] |
|
|
*** |
[0.3,0.4] |
|
|
[-0.3,-0.2] |
|
|
*** |
[0.2,0.3] |
|
|
[-0.2,-0.1] |
|
|
*** |
[0.1,0.2] |
|
|
[-0.1,0.0] |
|
|
*** |
[0.0,0.1] |
|
|
Below are the histograms for a 2 dimensional target. It is 2cm in the Y direction and 6cm in the Z direction. The electron was fired with an energy of 6 GeV at angles theta = 25 degrees and phi = 30 degrees.
GenPart.x |
GenPart.y |
GenPart.z |
Event.x |
Event.y |
Event.z
|
|
|
|
|
|
|
Interval |
Resolution (cm) |
Vy Difference |
*** |
Interval |
Resolution (cm) |
Vy Difference
|
[-1.0,-0.9] |
0.3522 +/- 0.0074 |
|
*** |
[0.9,1.0] |
0.03575 +/- 0.0061 |
|
[-0.9,-0.8] |
0.3687 +/- 0.0085 |
|
*** |
[0.8,0.9] |
0.3532 +/- 0.0065 |
|
[-0.8,-0.7] |
0.5183 +/- 0.0237 |
|
*** |
[0.7,0.8] |
0.3453 +/- 0.0060 |
|
[-0.7,-0.6] |
6.732 +/- 4.480 |
|
*** |
[0.6,0.7] |
0.3874 +/- 0.0079 |
|
[-0.6,-0.5] |
6.64 +/- 1.14 |
|
*** |
[0.5,0.6] |
0.3969 +/- 0.0082 |
|
[-0.5,-0.4] |
1.224 +/- 0.087 |
|
*** |
[0.4,0.5] |
0.4245 +/- 0.0102 |
|
[-0.4,-0.3] |
0.9054 +/- 0.0332 |
|
*** |
[0.3,0.4] |
0.6696 +/- 0.0409 |
|
[-0.3,-0.2] |
0.867 +/- 0.029 |
|
*** |
[0.2,0.3] |
0.9143 +/- 0.0394 |
|
[-0.2,-0.1] |
0.8118 +/- 0.0243 |
|
*** |
[0.1,0.2] |
0.857 +/- 0.029 |
|
[-0.1,0.0] |
0.8732 +/- 0.0315 |
|
*** |
[0.0,0.1] |
0.7906 +/- 0.0236 |
|
Interval |
Resolution (cm) |
Vz Difference |
*** |
Interval |
Resolution (cm) |
Vz Difference
|
[-3.0,-2.5] |
0.2184 +/- 0.0021 |
|
*** |
[2.5,3.0] |
0.2024 +/- 0.0018 |
|
[-2.5,-2.0] |
0.1985 +/- 0.0019 |
|
** |
[2.0,2.5] |
0.1974 +/- 0.0019 |
|
[-2.0,-1.5] |
0.2074 +/- 0.0022 |
|
*** |
[1.5,2.0] |
0.197 +/- 0.002 |
|
[-1.5,-1.0] |
0.1936 +/- 0.0019 |
|
*** |
[1.0,1.5] |
0.5621 +/- 0.0056 |
|
[-1.0,-0.5] |
0.9749 +/- 0.154 |
|
*** |
[0.5,1.0] |
0.2458 +/- 0.0040 |
|
[-0.5,0.0] |
0.1943 +/- 0.0024 |
|
*** |
[0.0,0.5] |
0.2309 +/- 0.0025 |
|
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
EG12#Vertex_Studies