Homogeneity of Small Chambers T4, T6, T7, T8 and Gas Gain Measurements of Frascati and Roma Chambers...

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



1 2

5

3 4

Connector 1

Connector 1

Connector 1

Connector 2

Connector 2

T7 Uniformity

T8 Uniformity



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

Homogeneity of Small Chambers T4, T6, T7, T8 and Gas Gain Measurements of Frascati and Roma Chambers...

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Transcript of Homogeneity of Small Chambers T4, T6, T7, T8 and Gas Gain Measurements of Frascati and Roma Chambers...