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EMU Beam Test Status

EMU Beam Test Status. J. Gilmore CMS Week EMU Meeting June 2003. CERN Testbeam Schedule. Structured Beam at CERN SPS, X5A Test Site May 23 – June 2: split time between muons & pions (for Tracker) Beam Structure Details 924 BX/orbit * 24.95 ns beam clock = 23 usec SPS orbit period

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EMU Beam Test Status

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  1. EMU Beam Test Status J. Gilmore CMS Week EMU Meeting June 2003

  2. CERN Testbeam Schedule • Structured Beam at CERN SPS, X5A Test Site • May 23 – June 2: split time between muons & pions (for Tracker) • Beam Structure Details • 924 BX/orbit * 24.95 ns beam clock = 23 usec SPS orbit period • 48 filled bunches in a single 1200 ns long train • 2.5 sec spill duration on a 16.8 sec cycle • Normal SPS Beam Conditions in June • Parasitic with Alice SDD June 13-18 (pions, 20k/spill) • Parasitic with Alice Muons June 25 – July 1 (muons) • Primary goal: validate crate electronics prior to October ESR & production • Test LHC synchronization scheme, look for 25 ns structure • Trigger performance tests with high-rate particles • Test 2 CSCs using TTC & DDU

  3. X5A Equipment Setup

  4. Gas Calibration • Bad gas mix due to low-pressure regulator • Compensate with HV at 3900 V • Recalibrate this week

  5. SPS Bunch Structure

  6. Bunch Structure & Time Resolution

  7. Multi-CSC Event Display, Muon

  8. The Next Event

  9. Pair of Muons

  10. CSC1: Theta=40, Phi_B=-45

  11. Efficiency vs TTC Phase

  12. Half-Strip vs Half-Strip

  13. Conclusion • ~1 million structured-beam events on tape • See pictures, plots, docs, etc. at the CSC Beamtest Web Page http://www.physics.ohio-state.edu/~cms/beamtest03/ • Get run info from our Web Log database at URL http://oraweb03.cern.ch:9000/pls/cms_emu_cern.pro/run_log.top_page • Proven capability to run a multi-CSCs system • 25 ns bunch structure is clearly seen in CSCs • Anode timing resolution is sufficient to see this • Achieved trigger efficiency ~99% • May improve with proper gas mixture • Sensitive to the fine-tuning of TTCrx clock phase • Theta-PhiB scan done, analysis forthcoming • Initial high-rate capability results look promising • More data and analysis needed

  14. Acknowledgments This test would not have been possible without the help of so many people…. Thanks to all those who helped in the preparation and operation of the beamtest!

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