Difference between revisions of "CH Discriminator Dual Pulsing"

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FuncGen_TFAmp_SpecAmp_CAEN80mV_4ms_03152022.png|'''4ms per division'''<span style="color:#ffff00">'''Yellow:'''</span> Function Generator output. <span style="color:#00ffff">'''Aqua:'''</span> Timing Filter Amp output.  <span style="color:#800080">'''Purple:'''</span> Spec Amp output.  <span style="color:#00ff00">'''Lime:'''</span>: CAEN Disc output.
 
FuncGen_TFAmp_SpecAmp_CAEN80mV_4ms_03152022.png|'''4ms per division'''<span style="color:#ffff00">'''Yellow:'''</span> Function Generator output. <span style="color:#00ffff">'''Aqua:'''</span> Timing Filter Amp output.  <span style="color:#800080">'''Purple:'''</span> Spec Amp output.  <span style="color:#00ff00">'''Lime:'''</span>: CAEN Disc output.
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FuncGen_TFAmp_SpecAmp_CAEN80mV_10us_03152022.png|'''10us per division'''<span style="color:#ffff00">'''Yellow:'''</span> Function Generator output. <span style="color:#00ffff">'''Aqua:'''</span> Timing Filter Amp output.  <span style="color:#800080">'''Purple:'''</span> Spec Amp output.  <span style="color:#00ff00">'''Lime:'''</span>: CAEN Disc output.
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FuncGen_TFAmp_SpecAmp_CAEN_2us_03152022.png|'''2us per division'''<span style="color:#ffff00">'''Yellow:'''</span> Function Generator output. <span style="color:#00ffff">'''Aqua:'''</span> Timing Filter Amp output.  <span style="color:#800080">'''Purple:'''</span> Spec Amp output.  <span style="color:#00ff00">'''Lime:'''</span>: CAEN Disc output.
  
  
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SpecAmp_CAEN80mV_DualTA_DualTB_40us_Multi03152022.png|'''40us per division'''<span style="color:#ffff00">'''Yellow:'''</span> Spec Amp output. <span style="color:#00ffff">'''Aqua:'''</span> CAEN Disc Output.  <span style="color:#800080">'''Purple:'''</span> Upper CAEN Dual timer output.  <span style="color:#00ff00">'''Lime:'''</span>: Lower CAEN Dual timer output.
 
SpecAmp_CAEN80mV_DualTA_DualTB_40us_Multi03152022.png|'''40us per division'''<span style="color:#ffff00">'''Yellow:'''</span> Spec Amp output. <span style="color:#00ffff">'''Aqua:'''</span> CAEN Disc Output.  <span style="color:#800080">'''Purple:'''</span> Upper CAEN Dual timer output.  <span style="color:#00ff00">'''Lime:'''</span>: Lower CAEN Dual timer output.
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FuncGen_TFAmp_SpecAmp_CAEN80mV_10us_03152022.png|'''10us per division'''<span style="color:#ffff00">'''Yellow:'''</span> Function Generator output. <span style="color:#00ffff">'''Aqua:'''</span> Timing Filter Amp output.  <span style="color:#800080">'''Purple:'''</span> Spec Amp output.  <span style="color:#00ff00">'''Lime:'''</span>: CAEN Disc output.
 
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FuncGen_TFAmp_SpecAmp_CAEN_2us_03152022.png|'''2us per division'''<span style="color:#ffff00">'''Yellow:'''</span> Function Generator output. <span style="color:#00ffff">'''Aqua:'''</span> Timing Filter Amp output.  <span style="color:#800080">'''Purple:'''</span> Spec Amp output.  <span style="color:#00ff00">'''Lime:'''</span>: CAEN Disc output.
 
  
  

Revision as of 17:33, 17 March 2022

Discriminators

All needed specifications can be found within the appropriate manual

CAEN N841 Leading Edge Discriminator

Modes: Update and Non-Update

  • For use with He3 tube, Update vs Non-update mode did not seem to make a difference in discriminator output.
  • See pages 10 & 12 in user manual

File:CAEN N841 Manual.pdf

Lecroy 821 Quad Discriminator

File:LRS 821 Specifications.pdf

Tektronix DPO 4104 Digital Phosphor Oscilloscope

For reference: Input to discriminators is spec amp output with the following settings

Course gain: 10

Fine gain: 1

Shaping type: Gaussian

Shaping time: 2us

  • Purple: Input signal from spec amp. Yellow: CAEN Dual Timer using Lecroy Disc as input. Aqua: Lecroy Disc Output. Lime:: CAEN Update Mode Disc Output.

  • Purple: Input signal from spec amp. Yellow: CAEN Dual Timer using Lecroy Disc as input. Aqua: Lecroy Disc Output. Lime:: CAEN Update Mode Disc Output.

  • Purple: Input signal from spec amp. Yellow: CAEN Dual Timer using CAEN Disc as input. Aqua: Lecroy Disc Output. Lime:: CAEN Update Mode Disc Output.

Continued Investigations

03/01/2022

  • Sourced a function generator

Function generator: Protek 93120 Digital Synthesis Arbitrary Function Generator/Counter

Measurements

I used a DC offset to create a purely negative pulse using a square wave signal ranging from 0 to -1V

Run Number Configuration Generator Rate Generator Pulse Amplitude (Set) Generator Pulse Height (Measured) Counts Run Time (Sec) Count Rate (Hz) Uncertainty
1 Function Gen feeding Scalar 1.00 KHz 1.00V ~1V 100000 100 1.000KHz
2 Function Gen feeding Scalar 1.00 KHz 1.00V ~1V 100000 100 1.000KHz
3 Function Gen feeding Scalar 1.00 KHz 1.00V ~1V 100000 100 1.000KHz
4 Function Gen feeding Scalar 1.00 KHz 1.00V ~1V 100000 100 1.000KHz
5 Function Gen feeding Scalar 1.00 KHz 1.00V ~1V 100000 100 1.000KHz

I used a DC offset to create a purely negative pulse using a sine wave signal ranging from 0 to -1V that is discriminated by the Lecroy disc.

Run Number Configuration Generator Rate Generator Pulse Amplitude (Set) Generator Pulse Height (Measured) Counts Run Time (Sec) Count Rate (Hz) Uncertainty
1 Function Gen, Lecroy Disc, Scalar 1.00 KHz 1.00V ~1V 100
2 Function Gen, Lecroy Disc, Scalar 1.00 KHz 1.00V ~1V 100
3 Function Gen, Lecroy Disc, Scalar 1.00 KHz 1.00V ~1V 100
4 Function Gen, Lecroy Disc, Scalar 1.00 KHz 1.00V ~1V 100
5 Function Gen, Lecroy Disc, Scalar 1.00 KHz 1.00V ~1V 100

Electronics Chain Investigation

Components

Function Generator: Protek 93120 using Arb function 19 (Log)

CAEN Quad Linear Fan In/Out Model: N625

Ortec Timing Filter Amp Model: 474-06

Ortec Spec Amp Model: 672-05

Discriminators:

  • LeCroy Model: 821
  • CAEN Model: N841

CAEN Dual Timer Model: 93B

Scope Images

LeCroy Discriminator

  • 400us per divisionYellow: Function Generator output. Aqua: Timing Filter Amp output. Purple: Spec Amp output. Lime:: LeCroy Disc output.

  • 10us per divisionYellow: Function Generator output. Aqua: Timing Filter Amp output. Purple: Spec Amp output. Lime:: LeCroy Disc output.

  • 2us per divisionYellow: Function Generator output. Aqua: Timing Filter Amp output. Purple: Spec Amp output. Lime:: LeCroy Disc output.

CAEN Discriminator

  • 4ms per divisionYellow: Function Generator output. Aqua: Timing Filter Amp output. Purple: Spec Amp output. Lime:: CAEN Disc output.

  • 10us per divisionYellow: Function Generator output. Aqua: Timing Filter Amp output. Purple: Spec Amp output. Lime:: CAEN Disc output.

  • 2us per divisionYellow: Function Generator output. Aqua: Timing Filter Amp output. Purple: Spec Amp output. Lime:: CAEN Disc output.

  • 40us per divisionYellow: Spec Amp output. Aqua: CAEN Disc Output. Purple: Upper CAEN Dual timer output. Lime:: Lower CAEN Dual timer output.

  • 40us per divisionYellow: Spec Amp output. Aqua: CAEN Disc Output. Purple: Upper CAEN Dual timer output. Lime:: Lower CAEN Dual timer output.





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CaGaS Phase II

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