Homogeneity of Small Chambers T4, T6, T7, T8 and Gas Gain Measurements of Frascati and
Roma Chambers
Emmanuel Angulo (CSU Fresno)Weekly Meeting ATLAS Muon Micromegas
7/8/2012
Cu X-Ray Measurements
• 90 Positions (0.9cm x 1cm)
• HV of Strips @ 520 • HV of Drift @ 300• X-Ray with 1mm
collimator and cu foil cover @ 100000 event count, and @ 10mm distance from chamber
Cu X-Ray 1 2 3 4 5 6 7 8 9 10
1
2
3
4
5
6
7
8
9
T4 (10mm to 5mm Drift) Unifortmity
T6 Uniformity
Corner points 1cm x 1cm
Middle point 6cm x 5cm
1 2
5
3 4
Connector 1
Connector 1
Connector 2
Connector 2
Connector 2
Connector 2
T6 Uniformity
T7 Uniformity
Corner points 1cm x 1cm
Middle point 4cm x 5cm
1 2
5
3 4
Connector 1
Connector 1
Connector 1
Connector 2
Connector 2
T7 Uniformity
T8 Uniformity
Corner points 1cm x 1cm
Middle point 4cm x 5cm
1 2
5
3 4
Connector 1
Connector 1
Connector 1
Connector 2
Connector 2
Noise up to Ch 143(Bad signal with connector 2)
T8 Uniformity with 55Fe
•25 Positions (1.8cm x 1.8cm)
• 3mm Collimator Hole @ 50000 event count
•Strip HV @ 520•Drift HV @ 300
Roma and Frascati Chambers Gas Gain 55Fe Measurements
1
3
5
2
4
• 5 Positions (1.8cm x 1.8cm) • 3mm Collimator Hole @ 20000 event count • Strip HV from 440-560• Drift HV @ 300
HV Connectors
X-Strips
Y-Strips
Frascati Gas Gain
440 450 460 470 480 490 500 510 520 530 540100
1000
10000
100000
Gas Gain X-Strips
Position 1 Position 2Position 3Positon 4Position 5
Strip HV
Gas G
ain
440 460 480 500 520 540 5601000
10000
100000
Gas Gain Y-Strips
Position 1Position 2Position 3Position 4Position 5
Strip HV
Gas G
ain
440 460 480 500 520 540 560100
1000
10000
100000
Gas Gain (X Vs Y Strips)
X-Strip Pos 1Y-Strip Pos 1X-Strip Pos 2Y-Strip Pos 2X-Strip Pos 3Y-Strip Pos 3X-Strip Pos 4Y-Strip Pos 4 X-Strip Pos 5Y-Strip Pos 5
Strip HV
Gas G
ain
Roma Gas Gain
440 460 480 500 520 540 5601000
10000
100000
Gas Gain X-Strips
X-Strips Pos 1X-Strips Pos 2X-Strips Pos 3X-Strips Pos 4X-Strips Pos 5
Strip HV
Gas G
ain
440 460 480 500 520 540 5601000
10000
100000
Gas Gain Y-Strips
Y-Strips Pos 1Y-Strips Pos 2Y-Strips Pos 3Y-Strips Pos 5Y-Strips Pos 4
Strip HV
Gas G
ain
440 460 480 500 520 540 5601000
10000
100000
Gas Gain (X Vs Y-Strips)
Y-Strips Pos 1Y-Strips Pos 2Y-Strips Pos 3Y-Strips Pos 5Y-Strips Pos 4X-Strips Pos 1X-Strips Pos 2X-Strips Pos 3X-Strips Pos 4X-Strips Pos 5
Strip HV
Gas G
ain