Difference between revisions of "GEM Cosmic V792 Measurements"

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=DAQ setup =
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[[Image:Pulse_output_from_the_Stanford_Pulse_Generator_12-13-08.png|150px|thumb|Two Identical '''A''' and '''B''' Pulse Generator Output Signals]][[Image:Amplified_Pulse_the_Stanford_Pulse_Generator_12-13-08.png|150px|thumb| Amplified Pulse Generator output signals '''A_494-09''' && '''B_494-06''']]<br>
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A Stanford Pulse Generator, Model DG535, was used to create signals similar to the GEM output pulse.  Two identical signals ('''A''' && '''B''') were injected into the Timing Filter Amplifiers to set the amplifier gain of each channel to the same value. Pulse '''A''' was injected to the Timing Filter Amplifier, Model 474-09 and Signal '''B''' was going into the Model 474-09. Integration time was set to 20 ns on each Timing Filter Amplifier. Coarse gain and Fine gain were set so that the Amplification for each channel was the same.
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After matching the amplifier gain, the output pulse '''A''' from the Timing Filter Amplifier, Model 474-09, was tee'd. One output was amplified again, using Timing Filter Amplifier and the second output was delayed and putted into the ADC with delayed and amplified '''B''' pulse.
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First two histograms below show the ADC results for two amplified pulses, and the last histogram shows the ratio of ADC1/ADC5. As one can notice, the charge ratio is close to one, mean value is ~ 1.<br>
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[[Image:Pulse_output_from_the_Stanford_Pulse_Generator_Noise_level_12-13-08.png|150px|thumb| Pulse Genereator Output Noise Levell]][[Image:Amplified_Pulse_the_Stanford_Pulse_Generator_Noise_level_12-13-08.png|150px|thumb| Amplified Pulse Generator Noise Level]]<br>
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[[Image:Amplified_and_delayed_Pulse_the_Stanford_Pulse_Generator_12-13-08.png|150px|thumb|Amplified and Delayed Pulse Generator Output]]<br>
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*Run Number 650.dat<br>
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[[Image:ADC1_SPG_12-13-08.gif|400px]][[Image:ADC5_SPG_12-13-08.gif|400px]]<br>
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[[Image:ADC1_over_ADC5SPG_12-13-08.gif|600px]]<br>
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=GEM Measurements=
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=12-10-08=
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The signal below represents a measurement of the Trig out signal from a 10 cm x 10 cm ionization chamber with 3 GEM preamplifiers.  The chamber gas a 90/10 % mixture of Arcon and CO2.  The Drift HV was set to 3200 Volts and the GEM preamplifier HV distribution network was set to 2900 Volts.  The V792 CAEN ADC channels have a gain of 100 fC/channel.  The main signal peak appears at channel number 759 and represents an accumulation of <math>75.9 \pm 4</math> pC of charge.
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[[Image:TrigOutSignal_R607.gif]]<br>
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Electronics Settings:<br>
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TrigOut goes to Timing Filter Amplifier(Coarse Gain=X6, Fine GAin=7.5ns && Integrate=20ns) and after amplification to ADC<br>
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StripOut is used as a trigger and gate. The signal from the strip is amplified by the Timing Filter Amplifier (Coarse Gain=X20, Fine Gain=12.5ns && Integrate=500ns)<br>
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The Threshold on DIFF. CFD is set to 0.70 (ULD=9.9~10 && LLD=0.5)<br>
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=12-11-08=
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HV Settings: <math>V_{Drift}=3200</math> Volts and <math>V_{GEM}=2900</math> Volts.<br>
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Gas type 90/10 ArCO2.<br>
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[[Image:TrigOut_electronics_setup_12-11-08.png|250px]][[Image:StripPulse_electronics_setup_12-11-08.png|250px]]<br>
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=12-13-08=
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Below Channel 1 represents StripOut and Channel 2 trigOut.<br>
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[[Image:Noise_level_On_GEM_detector_HV_3310_3010Volts_12-13-08.png|400px]][[Image:Pulse_On_GEM_detector_HV_3310_3010Volts_12-13-08.png|400px]]<br>
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*Run Number r651<br>
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Start Time: Dec 13 19:43:14 and End Time: Dec 14 00:21:47
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Electronics Settings:
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'''TrigOut.)'''
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Timing Filter Amplifier Model 474-06(Coarse Gain=X10, Fine Gain=5 && Integrate=20ns)<br>
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'''StripOut.)'''
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Timing Filter Amplifier Model 474-09(Coarse Gain=X10, Fine Gain=5 && Integrate=20ns)<br>
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'''Pulse for DIFF. CFD'''
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Timing Filter Amplifier Model 474-02(Coarse Gain=X4, Fine Gain=2 && Integrate=20ns)<br>
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DIFF. CFD(Threshold= 3, LLD=2.80 && ULD=9.55)<br>
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The Amplification on Strip pulse and TrigOut is the same. Signal is amplified and delayed after amplification.
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[[Image:Charge_collected_by_the_strips_and_charge_leaving_last_GEM_foil_Prelim_results_12-13-08.gif|400px]]<br>
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Charge leaving last GEM foil divided by the charge that was collected by the Strips.<br>
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[[Image:Charge_leaving_last_GEM_foil_divided_by_the_charge_that_was_collected_by_the_Strips_ADC5_over_ADC_1_12-13-08.gif|500px|thumb|left|Charge leaving last GEM Foil divided by the Charge that was collected by the Strips]]<br>
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[[Image:Charge_leaving_last_GEM_foil_divided_by_the_charge_that_was_collected_by_the_Strips_ADC5_over_ADC1_12-13-08.gif|300px|thumb|left|Charge leaving last GEM Foil divided by the Charge that was collected by the Strips]][[Image:Charge_leaving_last_GEM_foil_divided_by_the_charge_that_was_collected_by_the_Strips_ADC1_over_ADC5_12-13-08.gif|300px|thumb|right| Charge collected by the Strips divided by the Charge leaving last GEM Foil]]<br>
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=12-14-08=
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*Run Number r653
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Electronics Settings are the same, only integration time is set to 50ns for both signals(Strip and TrigOut)<br>
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Start Time: Dec 14 00:39:31 and End Time: Dec 14 16:07:21
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[[Image:Charge_collected_by_the_strips_and_charge_leaving_last_GEM_foil_12-13-08_integration_time_50ns.gif|400px]]<br>
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=12-15-08=
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Reproducing data.<br>
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*Run number r671
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Start time: Dec 15 15:43:00 Stop time: Dec 15 17:46:23<br>
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Electronics Settings:
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'''TrigOut.)'''
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Timing Filter Amplifier Model 474-06(Coarse Gain=X10, Fine Gain=5 && Integrate=20ns)<br>
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'''StripOut.)'''
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Timing Filter Amplifier Model 474-09(Coarse Gain=X10, Fine Gain=5 && Integrate=20ns)<br>
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'''Pulse for DIFF. CFD'''
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Timing Filter Amplifier Model 474-02(Coarse Gain=X4, Fine Gain=2 && Integrate=20ns)<br>
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DIFF. CFD(Threshold= 3, LLD=2.80 && ULD=9.55)<br>
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[[Image:Charge_collected_by_the_strips_12-15-08.gif|350px]]<br>
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=11-07-08=
 
=11-07-08=
  
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[[Image:ADC_measurement_GEMDetector_HV3800V_ADC1_11-07-08.gif|300px]][[Image:ADC_measurement_GEMDetector_HV3800V_ADC1_11-07-08_Landau_fit.gif|300px]]<br>
 
[[Image:ADC_measurement_GEMDetector_HV3800V_ADC1_11-07-08.gif|300px]][[Image:ADC_measurement_GEMDetector_HV3800V_ADC1_11-07-08_Landau_fit.gif|300px]]<br>
  
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=11-10-08=
 
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The pulse coming from the strips is delayed and amplified using the Timing Filter Amplifier Model_474(X6). The amplified pulse is connected to the V792 QDC.<br>
 
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Run 55?<br>
 
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Start Time: Nov 7 13:01:17; End Time: Nov ? ?:?:?<br>
 
  
 
[http://www.iac.isu.edu/mediawiki/index.php/GEMS Go Back]
 
[http://www.iac.isu.edu/mediawiki/index.php/GEMS Go Back]

Latest revision as of 03:11, 19 December 2008

DAQ setup

Two Identical A and B Pulse Generator Output Signals
Amplified Pulse Generator output signals A_494-09 && B_494-06


A Stanford Pulse Generator, Model DG535, was used to create signals similar to the GEM output pulse. Two identical signals (A && B) were injected into the Timing Filter Amplifiers to set the amplifier gain of each channel to the same value. Pulse A was injected to the Timing Filter Amplifier, Model 474-09 and Signal B was going into the Model 474-09. Integration time was set to 20 ns on each Timing Filter Amplifier. Coarse gain and Fine gain were set so that the Amplification for each channel was the same.

After matching the amplifier gain, the output pulse A from the Timing Filter Amplifier, Model 474-09, was tee'd. One output was amplified again, using Timing Filter Amplifier and the second output was delayed and putted into the ADC with delayed and amplified B pulse.

First two histograms below show the ADC results for two amplified pulses, and the last histogram shows the ratio of ADC1/ADC5. As one can notice, the charge ratio is close to one, mean value is ~ 1.

Pulse Genereator Output Noise Levell
Amplified Pulse Generator Noise Level


Amplified and Delayed Pulse Generator Output


  • Run Number 650.dat

ADC1 SPG 12-13-08.gifADC5 SPG 12-13-08.gif

ADC1 over ADC5SPG 12-13-08.gif

GEM Measurements

12-10-08

The signal below represents a measurement of the Trig out signal from a 10 cm x 10 cm ionization chamber with 3 GEM preamplifiers. The chamber gas a 90/10 % mixture of Arcon and CO2. The Drift HV was set to 3200 Volts and the GEM preamplifier HV distribution network was set to 2900 Volts. The V792 CAEN ADC channels have a gain of 100 fC/channel. The main signal peak appears at channel number 759 and represents an accumulation of [math]75.9 \pm 4[/math] pC of charge.


TrigOutSignal R607.gif

Electronics Settings:

TrigOut goes to Timing Filter Amplifier(Coarse Gain=X6, Fine GAin=7.5ns && Integrate=20ns) and after amplification to ADC
StripOut is used as a trigger and gate. The signal from the strip is amplified by the Timing Filter Amplifier (Coarse Gain=X20, Fine Gain=12.5ns && Integrate=500ns)
The Threshold on DIFF. CFD is set to 0.70 (ULD=9.9~10 && LLD=0.5)


12-11-08

HV Settings: [math]V_{Drift}=3200[/math] Volts and [math]V_{GEM}=2900[/math] Volts.
Gas type 90/10 ArCO2.

TrigOut electronics setup 12-11-08.pngStripPulse electronics setup 12-11-08.png


12-13-08

Below Channel 1 represents StripOut and Channel 2 trigOut.


Noise level On GEM detector HV 3310 3010Volts 12-13-08.pngPulse On GEM detector HV 3310 3010Volts 12-13-08.png

  • Run Number r651

Start Time: Dec 13 19:43:14 and End Time: Dec 14 00:21:47

Electronics Settings:

TrigOut.) Timing Filter Amplifier Model 474-06(Coarse Gain=X10, Fine Gain=5 && Integrate=20ns)

StripOut.) Timing Filter Amplifier Model 474-09(Coarse Gain=X10, Fine Gain=5 && Integrate=20ns)

Pulse for DIFF. CFD Timing Filter Amplifier Model 474-02(Coarse Gain=X4, Fine Gain=2 && Integrate=20ns)
DIFF. CFD(Threshold= 3, LLD=2.80 && ULD=9.55)


The Amplification on Strip pulse and TrigOut is the same. Signal is amplified and delayed after amplification.

Charge collected by the strips and charge leaving last GEM foil Prelim results 12-13-08.gif

Charge leaving last GEM foil divided by the charge that was collected by the Strips.

Charge leaving last GEM Foil divided by the Charge that was collected by the Strips



Charge leaving last GEM Foil divided by the Charge that was collected by the Strips
Charge collected by the Strips divided by the Charge leaving last GEM Foil


12-14-08

  • Run Number r653

Electronics Settings are the same, only integration time is set to 50ns for both signals(Strip and TrigOut)

Start Time: Dec 14 00:39:31 and End Time: Dec 14 16:07:21

Charge collected by the strips and charge leaving last GEM foil 12-13-08 integration time 50ns.gif

12-15-08

Reproducing data.

  • Run number r671

Start time: Dec 15 15:43:00 Stop time: Dec 15 17:46:23

Electronics Settings:

TrigOut.) Timing Filter Amplifier Model 474-06(Coarse Gain=X10, Fine Gain=5 && Integrate=20ns)

StripOut.) Timing Filter Amplifier Model 474-09(Coarse Gain=X10, Fine Gain=5 && Integrate=20ns)

Pulse for DIFF. CFD Timing Filter Amplifier Model 474-02(Coarse Gain=X4, Fine Gain=2 && Integrate=20ns)
DIFF. CFD(Threshold= 3, LLD=2.80 && ULD=9.55)


Charge collected by the strips 12-15-08.gif

11-07-08

The pulse coming from the strips is delayed and amplified using the Timing Filter Amplifier Model_474(X6). The amplified pulse is connected to the V792 QDC.
Run 550

Start Time: Nov 6 19:58:03; End Time: Nov 7 09:45:57

ADC measurement GEMDetector HV3800V ADC1 11-07-08.gifADC measurement GEMDetector HV3800V ADC1 11-07-08 Landau fit.gif


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