# Approval Plots for GEM Test Beam 2014

## Detailed PPT

#### Plots For Approval

 Download png file Beam profile plot for tracker 1, where tracker 1 is 10x10 GEM detector. Download png file Beam profile plot for tracker 2, where tracker 2 is 10x10 GEM detector. Download png file Beam profile plot for tracker 3, where tracker 3 is 10x10 GEM detector. Hit position along x is shown for trackers 1, 2, 3 and GE1/1. Hit position along Y is shown for trackers 1, 2 and 3. Trk only: (png) (pdf) Trk+GE1/1: (png) (pdf) Efficiency: (png) (pdf) Top left: showing two dimensional profile plot of tracker. Here, a hit is counted when a track is reconstructed, using a linear fit y=mx+b fit to the tracker hit positions, in the tracker with normalised 𝜒2 < 10. Top right: Showing hits if they are detected by all three tracker when a track is reconstructed and extrapolated to GE1/1 and if the residual of the extrapolated track on the GE1/1 surface and the actual hit found on the GE1/1 prototype is less than 5mm. Bottom: Showing the efficiency (It is the ratio of number of events detected by GE1/1 to number of events detected by all three tracker), which is nothing but the ratio of the two histogram bottom left divided by the top histogram. EfficiencyPlot_wrt_EGain_wError4times_2gas_3sector.png Detection efficiency of the GE1/1 for two gas mixtures at various (iη,iΦ) sectors readout sectors as a function of Egain is presented. E_gain is the average electric field in the GEM foil and is given as E_gain = (I x R_avg^GEMgap)/D, where I is current supplied to high voltage divider, R_avg^GEMgap is average of gap resistance and D is the thickness of gem foil. Efficiency, ϵ is given as ϵ = N_{GE11+Trk}/N_{Trk}, where NTrk is the number of events where a track reconstructed, using a linear fit y=mx+b fit to the tracker hit positions, in the tracker with normalised 𝜒2 < 10, and N_{GE1/1+Trk} is the number of events where a GE1/1 hit within 5mm of the extrapolated track position is found. The filled circle series is taken with Ar/CO2 (70/30) gas mixture at (iη,iΦ) = (5,2) while the triangle, square, and open circle series are taken with Ar/CO2/CF4 (45/15/40) at (iη,iΦ) = {(1,2),(5,2),(8,2)}, respectively. At a fixed high voltage operating point the effective gain with the Ar/CO2 mixture is approximately one order of magnitude higher than with Ar/CO2/CF4 mixture. As a result the efficiency distribution shown in the closed circle series, obtained with Ar/CO2, is shifted to lower values of Egain. TimeResolution_wrt_EDrift.png we assumed that the time resolution of the detector behaves as a gaussian. Then we convoluted this gaussian with a piecewise function which models the 40 MHz clock. The resultant convolution gives an equation which is fitted to the experimental data. The parameters of this fit give, among other observables, the time resolution of the detector before convolution. To deconvolute the data entirely we need to know the mathematical expression of the filter that applies to the causes of convolution in the electronics. Since, We did not know the exact functional form so we used the method above, and it removes the impact of the clock. The time resolution with Ar/CO2 (70/30) reaches faster values at a lower Edrift; however a given point on the Ar/CO2 curve has a gain approximately one order of magnitude higher gain than the corresponding gain with Ar/CO2/CF4 (45/15/40) plot. We are able to reach faster timing at lower gains with the addition of the CF4 and this is important from the point of view of detector safety because at higher gains the discharge probability is higher.

### Efficiency Data files:

1. With Ar/CO2 : (iη,iΦ) = (5,2) EfficiencyData_R1313_R1397_Ar_CO2_Eta52.txt

2. With Ar/CO2/CF4: (iη,iΦ) = (5,2) EfficiencyData_R1592_R1646_Ar_CO2_CF4_Eta52.txt

3. with Ar/CO2/CF4: (iη,iΦ) = (1,2) SWAPHV_EfficiencyData_R2065_R2123_Ar_CO2_CF4_Eta12.txt

4. with Ar/CO2/CF4: (iη,iΦ) = (8,2) SWAP_EfficiencyData_R1868_R1906_Ar_CO2_CF4_Eta82.txt

-- RamKrishnaSharma - 2015-10-21

Topic attachments
I Attachment History Action Size Date Who Comment
txt EfficiencyData_R1313_R1397_Ar_CO2_Eta52.txt r2 r1 manage 0.2 K 2016-02-08 - 13:52 RamKrishnaSharma
txt EfficiencyData_R1592_R1646_Ar_CO2_CF4_Eta52.txt r2 r1 manage 0.2 K 2016-02-08 - 13:52 RamKrishnaSharma
pdf EfficiencyPlot_TwoAxis_withError4times.pdf r1 manage 17.9 K 2015-10-22 - 20:54 RamKrishnaSharma EfficiencyPlot for 3 eta sector Two axis (Gain & V_Drift)
png EfficiencyPlot_TwoAxis_withError4times.png r2 r1 manage 23.6 K 2015-10-22 - 23:26 RamKrishnaSharma Efficiency Plot for 3 eta sector
jpg EfficiencyPlot_withError4times.jpg r1 manage 32.0 K 2015-10-21 - 21:54 RamKrishnaSharma EfficiencyPlot for 3 eta sector
pdf EfficiencyPlot_withError4times.pdf r3 r2 r1 manage 17.3 K 2015-10-22 - 11:04 RamKrishnaSharma EfficiencyPlot for 3 eta sector
png EfficiencyPlot_withError4times.png r2 r1 manage 16.6 K 2015-10-22 - 11:03 RamKrishnaSharma EfficiencyPlot for 3 eta sector
pdf EfficiencyPlot_wrt_DividerCurrent_wError4times_2gas.pdf r1 manage 22.2 K 2017-02-26 - 19:57 RamKrishnaSharma
png EfficiencyPlot_wrt_DividerCurrent_wError4times_2gas.png r1 manage 27.8 K 2017-02-26 - 19:57 RamKrishnaSharma
pdf EfficiencyPlot_wrt_EGain_wError4times_2gas.pdf r3 r2 r1 manage 19.2 K 2016-09-23 - 18:30 RamKrishnaSharma
png EfficiencyPlot_wrt_EGain_wError4times_2gas.png r3 r2 r1 manage 23.9 K 2016-09-23 - 18:30 RamKrishnaSharma
pdf EfficiencyPlot_wrt_EGain_wError4times_2gas_3sector.pdf r1 manage 22.2 K 2017-02-26 - 19:59 RamKrishnaSharma
png EfficiencyPlot_wrt_EGain_wError4times_2gas_3sector.png r1 manage 26.2 K 2017-02-26 - 19:59 RamKrishnaSharma
pdf EfficiencyPlot_wrt_VDrift_withError4times.pdf r3 r2 r1 manage 18.2 K 2015-10-23 - 13:40 RamKrishnaSharma Efficiency Plot for 3 eta sector wrt V_Drift
png EfficiencyPlot_wrt_VDrift_withError4times.png r3 r2 r1 manage 21.1 K 2015-10-23 - 13:40 RamKrishnaSharma Efficiency Plot for 3 eta sector wrt V_Drift
pdf Efficiency_Scan_Run1644_1.pdf r4 r3 r2 r1 manage 20.3 K 2016-02-24 - 06:40 RamKrishnaSharma
png Efficiency_Scan_Run1644_1.png r3 r2 r1 manage 36.0 K 2016-02-24 - 06:40 RamKrishnaSharma
pdf Efficiency_Scan_Run1644_2.pdf r4 r3 r2 r1 manage 20.2 K 2016-02-24 - 06:40 RamKrishnaSharma
png Efficiency_Scan_Run1644_2.png r3 r2 r1 manage 35.5 K 2016-02-24 - 06:40 RamKrishnaSharma
pdf Efficiency_Scan_Run1644_3.pdf r4 r3 r2 r1 manage 20.2 K 2016-02-24 - 06:40 RamKrishnaSharma
png Efficiency_Scan_Run1644_3.png r2 r1 manage 35.0 K 2016-02-24 - 06:40 RamKrishnaSharma
pdf GE11_Efficiency_Scan.pdf r4 r3 r2 r1 manage 21.3 K 2015-10-23 - 02:17 RamKrishnaSharma Efficiency Scan Plot
png GE11_Efficiency_Scan.png r4 r3 r2 r1 manage 18.3 K 2015-10-23 - 02:18 RamKrishnaSharma Efficiency Scan Plot
pdf GE11_IV.pdf r2 r1 manage 17.2 K 2015-10-21 - 23:40 RamKrishnaSharma Time Resolution Plot For GE11-IV
png GE11_IV.png r1 manage 54.0 K 2015-10-21 - 23:41 RamKrishnaSharma Time Resolution Plot For GE11-IV
pdf GE11_IV_TR.pdf r1 manage 15.0 K 2015-10-22 - 22:42 RamKrishnaSharma GE11_IV TR Plot
png GE11_IV_TR.png r1 manage 33.0 K 2015-10-22 - 22:42 RamKrishnaSharma GE11_IV TR Plot
pdf Ram_IEEE2015.pdf r8 r7 r6 r5 r4 manage 689.0 K 2015-12-10 - 18:36 RamKrishnaSharma Proceeding for IEEE 2015
txt SWAPHV_EfficiencyData_R2065_R2123_Ar_CO2_CF4_Eta12.txt r2 r1 manage 0.2 K 2016-02-08 - 13:52 RamKrishnaSharma
txt SWAP_EfficiencyData_R1868_R1906_Ar_CO2_CF4_Eta82.txt r2 r1 manage 0.2 K 2016-02-08 - 13:52 RamKrishnaSharma
png Selection_184.png r1 manage 44.9 K 2015-10-21 - 22:13 RamKrishnaSharma Time Resolution Plot For GE11-IV
png Selection_185.png r1 manage 46.1 K 2015-10-21 - 21:56 RamKrishnaSharma Beam Profile for Run number 1644
png Selection_196.png r1 manage 35.3 K 2015-10-22 - 20:27 RamKrishnaSharma profile_plots_for_Trackers_Run1644
png Selection_197.png r2 r1 manage 45.6 K 2015-10-23 - 15:04 RamKrishnaSharma Time Resolution Plot For GE11-IV wrt V_Drift
pdf TimeResolution_vDrift.pdf r1 manage 15.0 K 2015-10-23 - 13:30 RamKrishnaSharma Time Resolution Plot For GE11-IV wrt V_Drift
pdf TimeResolution_wrt_EDrift.pdf r5 r4 r3 r2 r1 manage 16.5 K 2016-09-23 - 18:30 RamKrishnaSharma
png TimeResolution_wrt_EDrift.png r6 r5 r4 r3 r2 manage 23.0 K 2016-09-23 - 18:30 RamKrishnaSharma
pdf Tracker1.pdf r4 r3 r2 r1 manage 20.3 K 2016-02-24 - 06:41 RamKrishnaSharma
png Tracker1.png r5 r4 r3 r2 r1 manage 35.1 K 2016-02-24 - 06:41 RamKrishnaSharma
png Tracker1_BeamProfile.png r2 r1 manage 33.9 K 2015-10-23 - 12:18 RamKrishnaSharma profile_plots_for_Tracker 1
pdf Tracker2.pdf r4 r3 r2 r1 manage 20.3 K 2016-02-24 - 06:41 RamKrishnaSharma
png Tracker2.png r5 r4 r3 r2 r1 manage 35.4 K 2016-02-24 - 06:41 RamKrishnaSharma
png Tracker2_BeamProfile.png r2 r1 manage 34.3 K 2015-10-23 - 12:18 RamKrishnaSharma profile_plots_for_Tracker 2
pdf Tracker3.pdf r4 r3 r2 r1 manage 20.3 K 2016-02-24 - 06:41 RamKrishnaSharma
png Tracker3.png r4 r3 r2 r1 manage 35.2 K 2016-02-24 - 06:41 RamKrishnaSharma
png Tracker3_BeamProfile.png r2 r1 manage 34.6 K 2015-10-23 - 12:18 RamKrishnaSharma profile_plots_for_Tracker 3
pdf Tracker_Hit_position_Run1644_x.pdf r6 r5 r4 r3 r2 manage 17.5 K 2016-03-02 - 14:47 RamKrishnaSharma
png Tracker_Hit_position_Run1644_x.png r6 r5 r4 r3 r2 manage 18.1 K 2016-03-02 - 14:47 RamKrishnaSharma
pdf Tracker_Hit_position_Run1644_y.pdf r6 r5 r4 r3 r2 manage 16.0 K 2016-03-02 - 14:47 RamKrishnaSharma
png Tracker_Hit_position_Run1644_y.png r6 r5 r4 r3 r2 manage 15.8 K 2016-03-02 - 14:47 RamKrishnaSharma
pdf profile_plots_for_Tracker.pdf r1 manage 31.9 K 2015-10-23 - 12:18 RamKrishnaSharma profile_plots_for_Tracker
pdf profile_plots_for_Trackers_Run1644.pdf r1 manage 31.9 K 2015-10-21 - 22:11 RamKrishnaSharma profile_plots_for_Trackers_Run1644
png profile_plots_for_Trackers_Run1644.png r1 manage 48.4 K 2015-10-21 - 22:11 RamKrishnaSharma profile_plots_for_Trackers_Run1644
Topic revision: r27 - 2017-05-26 - RamKrishnaSharma

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