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.
TGEM Detector HV setting
[2]Media:Development_of_Tracking_Detectors_with_industrially_produced_GEM_Foils.pdf
- [math]\displaystyle{ V_{GEM} = 0.103 \times V_{Drift} }[/math]
- [math]\displaystyle{ V_{GEM} = 0.103 \times V_{Drift} }[/math]
[math]\displaystyle{ V_{GEM} }[/math] is between ~[300V, 600V] for [math]\displaystyle{ CF_4 }[/math] and for [math]\displaystyle{ Ar/CO_2 }[/math] it is [200V, 370V];
[math]\displaystyle{ V_{Drift} }[/math] voltage is ~[2900V, 5800V] ([1950V, 4000V]) for [math]\displaystyle{ CF_4 }[/math] ([math]\displaystyle{ Ar/CO_2 }[/math]).
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]\displaystyle{ \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 |
