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Milestones

Milestones. 13.12.2009: 24 hours running - currents. Orbits – golden “Santa Klaus”. 13.12.2009: Wire Scans During STABLE Beams. Beam2 horizontal: Beam2 vertical. Comparing beam size from wire with synchrotron light monitor

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Milestones

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  1. Milestones

  2. 13.12.2009: 24 hours running - currents

  3. Orbits – golden “Santa Klaus”

  4. 13.12.2009: Wire Scans During STABLE Beams Beam2 horizontal: Beam2 vertical Comparing beam size from wire with synchrotron light monitor Wire: sx = 0.98mm sy = 3.0mmBSRT: sx = 1.10mm, sy = 2.7mm  ca factor 2 between sy and sx

  5. BSRT on beam 2 Thibault/Allan 9/1/2014 6

  6. ?? CMS solenoid changes the beam energy ?? NO! But Earth tides do! Joerg Ramp up coincided with large tidal change – good agreement ! Tidal swing corresponds to ~ 15 Hz. LHC measures influence of tidal forces 10 days after 1st Beam! 7

  7. debunched 8

  8. 16 bunches 9

  9. Beam commissioning strategy Mike’s cunning plan Global machine checkout Essential 450 GeV commissioning Trial ramps Machine protection commissioning 1 Experiments’ magnets at 450 GeV All has been accomplished! + Xmas 450 GeV collisions Ramp commissioning to 1.2 TeV System/beam commissioning Machine protection commissioning 2 3.5 TeV beam & first collisions 2010 Full machine protection qualification System/beam commissioning Pilot physics

  10. Muon Spectrometer (||<2.7): air-core toroids with gas-based chambers Muon trigger and measurement with momentum resolution < 10% up toE ~ TeV Length : ~ 46 m Radius : ~ 12 m Weight : ~ 7000 tons ~108 electronic channels 3-level trigger reducing the rate from 40 MHz to ~200 Hz Inner Detector (||<2.5, B=2T): Si Pixels and strips (SCT) + Transition Radiation straws Precise tracking and vertexing, e/ separation (TRT). Momentum resolution: /pT ~ 3.4x10-4 pT (GeV)  0.015 EM calorimeter: Pb-LAr Accordion e/ trigger, identification and measurement E-resolution: ~ 1% at 100 GeV, 0.5% at 1 TeV HAD calorimetry (||<5): segmentation, hermeticity Tilecal Fe/scintillator (central), Cu/W-LAr (fwd) Trigger and measurement of jets and missing ET E-resolution:/E ~ 50%/E  0.03 17

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