TGEMS

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.

PCboard spacing = 1.5 - 2 mm.

[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]).

Descriminated signals

HV setting

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

Descriminator setup

I used 2 timing amps to integrate the signal and amplify more then the basic 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

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