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Emmanuel Angulo (CSU Fresno) Weekly Meeting ATLAS Muon Micromegas 7/8/2012

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. 9 0 Positions (0.9cm x 1 cm ) HV of Strips @ 52 0 HV of Drift @ 300

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Emmanuel Angulo (CSU Fresno) Weekly Meeting ATLAS Muon Micromegas 7/8/2012

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  1. Homogeneity of Small Chambers T4, T6, T7, T8 and Gas Gain Measurements of Frascati and Roma Chambers Emmanuel Angulo (CSU Fresno) Weekly Meeting ATLAS MuonMicromegas 7/8/2012

  2. 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

  3. T4 (10mm to 5mm Drift) Unifortmity

  4. T6 Uniformity Connector 2 Connector 2 Connector 1 Connector 2 Middle point 6cm x 5cm Corner points 1cm x 1cm Connector 2 Connector 1

  5. T6 Uniformity

  6. T7 Uniformity Connector 2 Connector 1 Connector 1 Middle point 4cm x 5cm Corner points 1cm x 1cm Connector 2 Connector 1

  7. T7 Uniformity

  8. T8 Uniformity Connector 2 Connector 1 Connector 1 Middle point 4cm x 5cm Noise up to Ch 143 (Bad signal with connector 2) Corner points 1cm x 1cm Connector 2 Connector 1

  9. T8 Uniformity with 55Fe • 25 Positions (1.8cm x 1.8cm) • 3mm Collimator Hole @ 50000 event count • Strip HV @ 520 • Drift HV @ 300

  10. Roma and Frascati Chambers Gas Gain 55Fe Measurements X-Strips 1 2 • 5 Positions (1.8cm x 1.8cm) • 3mm Collimator Hole @ 20000 event count • Strip HV from 440-560 • Drift HV @ 300 Y-Strips 3 4 5 HV Connectors

  11. Frascati Gas Gain

  12. Roma Gas Gain

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