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Minimum Bias Trigger Scintillators

Minimum Bias Trigger Scintillators. Rachel Hyneman UM-CERN-REU 2014. The MBTS – An Overview. One of the triggers available on ATLAS detector Comprised of a set of scintillating panels located near end-caps of the detector, perpendicular to the beam line

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Minimum Bias Trigger Scintillators

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  1. Minimum Bias Trigger Scintillators Rachel Hyneman UM-CERN-REU 2014

  2. The MBTS – An Overview • One of the triggers available on ATLAS detector • Comprised of a set of scintillating panels located near end-caps of the detector, perpendicular to the beam line • Provided the lowest bias trigger for low-luminosity Run 1 events • Minimum bias = loose kinematic requirements to trigger A diagram of one side of the MBTS used in Run 1 Performance of the Minimum Bias Trigger in p-p Collisions at √s = 900 GeV ATLAS-CONF-2010-025

  3. The MBTS Within the ATLAS Detector Two Sides, labeled “A” and “C” In-situ Calibration of MBTS with 900 GeV and 7 TeV Data Eric Feng, Sept 2013

  4. Overview of MBTS Electronics

  5. Changes to MBTS for Run 2 • Using fewer channels for read out • 12 on each side (previously 16) • Outer ring: 8 panels → 4 panels • New scintillator layout shown in pink outline • Discriminators: leading edge → constant fraction ATLAS Minimum Bias Trigger Scintillator Upgrade for LHC RunII Antonio Sidoti

  6. Status • Already completed: • Combine outer scintillating plates • Reroute outputs through different TileCal drawers and PMT’s • Use directly injected charge pulse to confirm correct installation • All of side C and outer ring of Side A correctly installed (with a few anomalies) • To Be Completed: • Use laser to check PMT functionality • Calibrate outputs • Replace leading-edge discriminators with constant-fraction discriminators • Software trigger work (starting in July)

  7. Flaming Crepe in Paris!

  8. More Info • ATLAS Conference Notes • ATLAS-CONF-2010-068, “Performance of the Minimum Bias Trigger in p-p Collisions at √s = 7 TeV” • ATLAS-CONF-2010-025, “Performance of the Minimum Bias Trigger in p-p Collisions at √s = 900 GeV”

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