Difference between revisions of "TGEMS"

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TGEMS : defined as GEM detector which use thick PCboard (0.4 mm thick) size GEM preamplifiers with hole diameters between 0.5 and 1 mm.
 
  
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PCboard spacing = 1.5 - 2 mm.
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[[Neutron_TGEM_Detector_Abdel]]
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TGEMS : defined as GEM detector which use thick PCboard (0.4 mm thick) size GEM preamplifiers with hole diameters between 0.5 and 1 mm (we have 0.5 diameter boards in stock).
 +
 
 +
PCboard spacing = 1.5 - 2 mm (distance between the centers of 2 holes in parallel layers is 1mm).
  
 
[http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1352098], [[Media:01352098.pdf]] <br>
 
[http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1352098], [[Media:01352098.pdf]] <br>
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[[Image:TGEM_Detector_TGEMfoil_1.jpg|200px]][[Image:TGEM_Detector_TGEMfoil_2.jpg|200px]][[Image:TGEM_Detector_TGEMfoil_3.jpg|200px]]<br>
 
[[Image:TGEM_Detector_TGEMfoil_1.jpg|200px]][[Image:TGEM_Detector_TGEMfoil_2.jpg|200px]][[Image:TGEM_Detector_TGEMfoil_3.jpg|200px]]<br>
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[[Image:TGEM_Detector_cathode.jpg|300px]][[Image:TGEM_Detector.jpg|300px]]<br>
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= Descriminated signals=
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== Test Setup 1==
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{| border="1"  |cellpadding="20" cellspacing="0
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| Cathode HV (Volts) || First THGEM foil(Volts) || Second THGEM foil(Volts) || Third THGEM foil(Volts) || Third THGEM foil current <math>\mu</math>A
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|-
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| 3000 || 1756 || 1657 || 1652 || 1273 
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|}<br>
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I used 2 Ortec timing amps to integrate the signal and amplify more than what we did for the standard GEM.
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The following setttings were
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{| border="1"  |cellpadding="20" cellspacing="0
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| Parameter || Dial setting
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|-
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| Timing Amp1  ||  x20
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|-
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| Timing Amp1 Integration ||  50 ns
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|-
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| Timing Amp2  ||  x4
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|-
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| Timing Amp2 Integration ||  20 ns
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|-
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| CFD Threshold  ||  5.22
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|-
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| CFD Threshold ULD  ||  5.28
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|-
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| CFD Threshold  LLD ||  3.04
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|}<br>
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[[Image:Pulse_from_THGEMD_strips_and_CFD_HV3000Volts_11-9-08.png|300px]][[Image:Pulse_from_THGEMD_strips_and_nothing_from_CFDisc_HV3000Volts_11-9-08.png|300px]]<br>
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[[Image:Noise_from_THGEMD_strips_and_pulse_from_CFD_HV3000Volts_11-9-08.png|300px]][[Image:Noise_from_THGEMD_strips_and_no_pulse_CFD_HV3000Volts_11-9-08.png|300px]]<br>
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= THGEM see through detector=
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[[File:A01072012_IonChamberDemo.jpg | 200 px]]
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[[File:B01072012_IonChamberDemo.jpg | 200 px]]
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[[File:C01072012_IonChamberDemo.jpg | 200 px]]
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[[File:D01072012_IonChamberDemo.jpg | 200 px]]
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=GEM fission chamber tests=
  
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[[GEM_Fission_IAC_11082013]]
  
 
[http://www.iac.isu.edu/mediawiki/index.php/User_talk:Tforest Go back]
 
[http://www.iac.isu.edu/mediawiki/index.php/User_talk:Tforest Go back]

Latest revision as of 15:55, 8 November 2013

Neutron_TGEM_Detector_Abdel

TGEMS : defined as GEM detector which use thick PCboard (0.4 mm thick) size GEM preamplifiers with hole diameters between 0.5 and 1 mm (we have 0.5 diameter boards in stock).

PCboard spacing = 1.5 - 2 mm (distance between the centers of 2 holes in parallel layers is 1mm).

[1], Media:01352098.pdf

TGEM Detector HV setting

[2]Media:Development_of_Tracking_Detectors_with_industrially_produced_GEM_Foils.pdf

[math]V_{GEM} = 0.103 \times V_{Drift}[/math]

[math]V_{GEM}[/math] is between ~[300V, 600V] for [math]CF_4[/math] and for [math]Ar/CO_2[/math] it is [200V, 370V];

[math]V_{Drift}[/math] voltage is ~[2900V, 5800V] ([1950V, 4000V]) for [math]CF_4[/math] ([math]Ar/CO_2[/math]).

TGEM detector.jpgTGEM detector 1.jpg

TGEM Detector TGEMfoil 1.jpgTGEM Detector TGEMfoil 2.jpgTGEM Detector TGEMfoil 3.jpg
TGEM Detector cathode.jpgTGEM Detector.jpg

Descriminated signals

Test Setup 1

Cathode HV (Volts) First THGEM foil(Volts) Second THGEM foil(Volts) Third THGEM foil(Volts) Third THGEM foil current [math]\mu[/math]A
3000 1756 1657 1652 1273



I used 2 Ortec timing amps to integrate the signal and amplify more than what we did for the standard GEM.

The following setttings were

Parameter Dial setting
Timing Amp1 x20
Timing Amp1 Integration 50 ns
Timing Amp2 x4
Timing Amp2 Integration 20 ns
CFD Threshold 5.22
CFD Threshold ULD 5.28
CFD Threshold LLD 3.04



Pulse from THGEMD strips and CFD HV3000Volts 11-9-08.pngPulse from THGEMD strips and nothing from CFDisc HV3000Volts 11-9-08.png

Noise from THGEMD strips and pulse from CFD HV3000Volts 11-9-08.pngNoise from THGEMD strips and no pulse CFD HV3000Volts 11-9-08.png

THGEM see through detector

A01072012 IonChamberDemo.jpg


B01072012 IonChamberDemo.jpg


C01072012 IonChamberDemo.jpg

200 px


GEM fission chamber tests

GEM_Fission_IAC_11082013

Go back

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