Difference between revisions of "Trash"

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[[Image:TrigOutSignal_R607_full_scale.png]]
 
[[Image:TrigOutSignal_R607_full_scale.png]]
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TrigOut and the stripsignal, both are used as a pulse and  go to ADC.<br>
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The pulse from the Strips is used as a trigger and gate.<br>
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The pulse from the  trigout is delayed, Amplified by the Timinig Filter Amplifier(Coarse_Gain=X20, Fine_Gain=8.5 && Integrate=20ns).<br>
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Signal from the Strips goes to the Timing Filter Amplifier(Coarse_Gain=X20, Fine_Gain=10.5 && Integrate=20ns). Amplified pulse is devided into two signals,  One is sued as a trigger and gate and second as a pulse for ADC. The first one(gate && trigger) is amplified using the Timing Filter Amplifier(Coarse_Gain=X2, Fine_Gain=10 && Integrate=50ns) and used in DIFF. CFD for gate and trigger. Second output from the Amplified strips, goes to delay box(TENNELEC TC 215 DELAY AMPLIFIER) and putted to the ADC.
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The results shown below are for different Diff. CFD values.<br>
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'''1).''' Threshold Values: Threshold=1.90, ULD=9.65  && LLD=2.10 <br>
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Run Number is r613<br>
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Start time: Dec 11 16:31:42  End Time: Dec 11 17:32:23<br>
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'''2).''' Threshold Values: Threshold=3.10, ULD=9.65  && LLD=2.90 <br>
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Run Number is r622<br>
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Start time: Dec 11 19:25:28  End Time: Dec 11 21:53:44<br>
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[[Image:Charge_leaving_last_GEM_foil-12-11-08_r622.gif|300px]][[Image:Charge_collected_by_the_strips_GEM-1l-12-11-08_r622.gif|300px]]<br>
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'''2).''' Threshold Values: Threshold=3.70, ULD=9.65  && LLD=3.50 <br>
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Run Number is r624<br>
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Start time: Dec 11 21:58:37  End Time: Dec 12 12:19:53 <br>
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[[Image:GEM_RUN_Number_r624_charge_collected_by_the_strips_and_charge_leaving_last_GEM_foil-12-12-08.gif|500px]]<br>
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The result shown  below is reasonable. The charge that left the last GEM foil is greater than the charge collected by the strips.<br>
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[[Image:Charge_leaving_last_GEM_foil_run_number_r624-12-12-08.gif|350px]][[Image:Charge_collected_by_the_Strips_number_r624-12-12-08.gif|350px]]
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[[Image:Actual_Charge_on_the_strip_and_on_TrigOut_12-12-08.gif|400px]][[Image:ADC1_over_ADC5_r624_12-12-08.gif|400px]]<br>
  
 
[[User_talk:Tamar]]
 
[[User_talk:Tamar]]

Revision as of 23:14, 17 December 2008

12-12-08

Finding out what is gain for each channel using the Stanford pulse generator.

Setting:

Run Number: r634 && r635

Amplified pulse for two channels.gifAmplified pulse for two channels swapped.gif

Original pulse from stanford pulse generator goes to the ADC: r636 && r637


Pulse for two channels.gifPulse for two channels swapped.gif

I used the attenuator for both channels and it was set to the same value: 12dB = 10.7918.

[math]X db = 20 log_{10}\frac{I_1}{I_2}[/math]
[math]\frac{I_1}{I_2} = 10^{12/20} = 3.98[/math]

Gain Calculation

Gain_for_Channel_1 = Gain_TrigOut = [math]\frac{175 \times 10.7918}{110} = 17.1688[/math]
Gain_for_Channel_5 = Gain_Strip = [math]\frac{650 \times 10.7918}{145} = 48.377[/math]


TrigOutSignal R607 full scale.png


TrigOut and the stripsignal, both are used as a pulse and go to ADC.
The pulse from the Strips is used as a trigger and gate.

The pulse from the trigout is delayed, Amplified by the Timinig Filter Amplifier(Coarse_Gain=X20, Fine_Gain=8.5 && Integrate=20ns).
Signal from the Strips goes to the Timing Filter Amplifier(Coarse_Gain=X20, Fine_Gain=10.5 && Integrate=20ns). Amplified pulse is devided into two signals, One is sued as a trigger and gate and second as a pulse for ADC. The first one(gate && trigger) is amplified using the Timing Filter Amplifier(Coarse_Gain=X2, Fine_Gain=10 && Integrate=50ns) and used in DIFF. CFD for gate and trigger. Second output from the Amplified strips, goes to delay box(TENNELEC TC 215 DELAY AMPLIFIER) and putted to the ADC.

The results shown below are for different Diff. CFD values.

1). Threshold Values: Threshold=1.90, ULD=9.65 && LLD=2.10

Run Number is r613

Start time: Dec 11 16:31:42 End Time: Dec 11 17:32:23


2). Threshold Values: Threshold=3.10, ULD=9.65 && LLD=2.90

Run Number is r622

Start time: Dec 11 19:25:28 End Time: Dec 11 21:53:44

Charge leaving last GEM foil-12-11-08 r622.gifCharge collected by the strips GEM-1l-12-11-08 r622.gif


2). Threshold Values: Threshold=3.70, ULD=9.65 && LLD=3.50

Run Number is r624

Start time: Dec 11 21:58:37 End Time: Dec 12 12:19:53

GEM RUN Number r624 charge collected by the strips and charge leaving last GEM foil-12-12-08.gif

The result shown below is reasonable. The charge that left the last GEM foil is greater than the charge collected by the strips.

Charge leaving last GEM foil run number r624-12-12-08.gifCharge collected by the Strips number r624-12-12-08.gif

Actual Charge on the strip and on TrigOut 12-12-08.gifADC1 over ADC5 r624 12-12-08.gif

User_talk:Tamar