View source for GEM Efficiency

===Qweak GEM High Voltage vs Efficiency===


Experimental setup: Qweak GEM detector is sandwiched between the two Drift chambers and two scintillators. 

[[File:Detector stack 402.jpg|300px]]<br/>


[[File:tam.jpg|300px]]


{| border="1"  |cellpadding="20" cellspacing="0 
|-
| GEM <math>V_{Drift}</math> Voltage (Volts) || GEM Efficiency %
|-
| 3550 || 47.25 <math>\pm</math> 6.05
|-
|3555 || 60 <math>\pm</math> 4
|-
| 3560 || 83 <math>\pm</math> 13 
|-
| 3575 || 95.25 <math>\pm</math> 3.45
|}


====3500/3200====

run number is 1365 

{| border="1"  |cellpadding="20" cellspacing="0 
|-
|Channel # || Detector type|| TDC Histograms BottomScTDC>500 || TDC#/TDC2 <math>\times 100 %</math>
|-
| 2 || Bottom Scintillator || [[File:TDCBottomScintillator_3500.gif|200px]] || 100%
|-
| 4 || Top DC(Metalica) || [[File:TDCTopDC_3500.gif|200px]] || 16 %
|-
| 3 || Bottom DC(Plastika) || [[File:TDCBottomDC_3500.gif|200px]]  || 16 %
|-
| 5 || Qweak GEM Detector || [[File:TDCQweakGEMDetector_3500.gif|200px]] || 6 %
|}<br>


40% <math>\pm</math> 2%

====3550/3250====

*run number is 1366 

{| border="1"  |cellpadding="20" cellspacing="0 
|-
|Channel # || Detector type|| TDC Histograms BottomScTDC>500  || TDC#/TDC2 <math>\times 100 %</math>
|-
| 2 || Bottom Scintillator || [[File:TDCBottomScintillator_3550.gif|200px]] || 100 %
|-
| 4 || Top DC(Metalica) || [[File:TDCTopDC_3550.gif|200px]] || 5 % 
|-
| 3 || Bottom DC(Plastika) || [[File:TDCBottomDC_3550.gif|200px]] || 11 %
|-
| 5 || Qweak GEM Detector || [[File:TDCQweakGEMDetector_3550.gif|200px]] || 6 %
|}<br>



*run number 1377

{| border="1"  |cellpadding="20" cellspacing="0 
|-
|Channel # || Detector type|| TDC Histograms BottomScTDC>500  || TDC#/TDC2 <math>\times 100 %</math>
|-
| 2 || Bottom Scintillator || [[File:TDCBottomScintillator_3550_1.gif|200px]] || 100 %
|-
| 4 || Top DC(Metalica) || [[File:TDCTopDC_3550_1.gif|200px]] || 6 % 
|-
| 3 || Bottom DC(Plastika) || [[File:TDCBottomDC_3550_1.gif|200px]] || 16 %
|-
| 5 || Qweak GEM Detector || [[File:TDCQweakGEMDetector_3550_1.gif|200px]] ||  10%
|}<br>


68% <math>\pm</math> 4%

====3555/3255====

*run number is 1373

{| border="1"  |cellpadding="20" cellspacing="0 
|-
|Channel # || Detector type|| TDC Histograms BottomScTDC>500  || TDC#/TDC2 <math>\times 100 %</math>
|-
| 2 || Bottom Scintillator || [[File:TDCBottomScintillator_3555.gif|200px]] || 100 %
|-
| 4 || Top DC(Metalica) || [[File:TDCTopDC_3555.gif|200px]] || 6 % 
|-
| 3 || Bottom DC(Plastika) || [[File:TDCBottomDC_3555.gif|200px]] || 14 %
|-
| 5 || Qweak GEM Detector || [[File:TDCQweakGEMDetector_3555.gif|200px]] || 10 %
|}<br>


*run number 1381 && 1382

{| border="1"  |cellpadding="20" cellspacing="0 
|-
|Channel # || Detector type|| TDC Histograms BottomScTDC>500  || TDC#/TDC2 <math>\times 100 %</math>
|-
| 2 || Bottom Scintillator || [[File:TDCBottomScintillator_3555_1.gif|200px]] || 100 %
|-
| 4 || Top DC(Metalica) || [[File:TDCTopDC_3555_1.gif|200px]] ||  6.6% 
|-
| 3 || Bottom DC(Plastika) || [[File:TDCBottomDC_3555_1.gif|200px]] || 15 %
|-
| 5 || Qweak GEM Detector || [[File:TDCQweakGEMDetector_3555_1.gif|200px]] || 10 %
|}<br>

====3560/3260====

*run number is 1370

{| border="1"  |cellpadding="20" cellspacing="0 
|-
|Channel # || Detector type|| TDC Histograms BottomScTDC>500  || TDC#/TDC2 <math>\times 100 %</math>
|-
| 2 || Bottom Scintillator || [[File:TDCBottomScintillator_3560.gif|200px]] || 100 %
|-
| 4 || Top DC(Metalica) || [[File:TDCTopDC_3560.gif|200px]] ||  6% 
|-
| 3 || Bottom DC(Plastika) || [[File:TDCBottomDC_3560.gif|200px]] ||  14%
|-
| 5 || Qweak GEM Detector || [[File:TDCQweakGEMDetector_3560.gif|200px]] || 17 %
|}<br>


*run number is 1378

{| border="1"  |cellpadding="20" cellspacing="0 
|-
|Channel # || Detector type|| TDC Histograms BottomScTDC>500  || TDC#/TDC2 <math>\times 100 %</math>
|-
| 2 || Bottom Scintillator || [[File:TDCBottomScintillator_3560_1.gif|200px]] || 100 %
|-
| 4 || Top DC(Metalica) || [[File:TDCTopDC_3560_1.gif|200px]] ||  7% 
|-
| 3 || Bottom DC(Plastika) || [[File:TDCBottomDC_3560_1.gif|200px]] ||  16%
|-
| 5 || Qweak GEM Detector || [[File:TDCQweakGEMDetector_3560_1.gif|200px]] || 14 %
|}<br>

====3575/3275====

*run number is 1369

{| border="1"  |cellpadding="20" cellspacing="0 
|-
|Channel # || Detector type|| TDC Histograms BottomScTDC>500  || TDC#/TDC2 <math>\times 100 %</math>
|-
| 2 || Bottom Scintillator || [[File:TDCBottomScintillator_3575.gif|200px]] || 100 %
|-
| 4 || Top DC(Metalica) || [[File:TDCTopDC_3575.gif|200px]] || 4 %
|-
| 3 || Bottom DC(Plastika) || [[File:TDCBottomDC_3575.gif|200px]] || 15 %
|-
| 5 || Qweak GEM Detector || [[File:TDCQweakGEMDetector_3575.gif|200px]] || 17 %
|}<br>

*run number 1379

{| border="1"  |cellpadding="20" cellspacing="0 
|-
|Channel # || Detector type|| TDC Histograms BottomScTDC>500  || TDC#/TDC2 <math>\times 100 %</math>
|-
| 2 || Bottom Scintillator || [[File:TDCBottomScintillator_3575_1.gif|200px]] || 100 %
|-
| 4 || Top DC(Metalica) || [[File:TDCTopDC_3575_1.gif|200px]] || 5 %
|-
| 3 || Bottom DC(Plastika) || [[File:TDCBottomDC_3575_1.gif|200px]] ||  18 %
|-
| 5 || Qweak GEM Detector || [[File:TDCQweakGEMDetector_3575_1.gif|200px]] ||  20 %
|}<br>