Programme for VDM measurements Friday Oct 15 Phase

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Programme for VDM measurements Friday Oct 15 Phase I: Getting ready 06: 00 07:

Programme for VDM measurements Friday Oct 15 Phase I: Getting ready 06: 00 07: 03 09: 45 11: 35 12: 05 12: 42 Started BI checks without beam (BCT) S 81+LHCb dipole tripped => precycle needed …. delay Started filling… some probs with XPOC & filling scheme 16 bunches ready at 450 Ge. V, checked , Ramp started Squeeze started 13: 05 13: 12 Squeeze finished Collapsed, optimize IPs… 9: 00 meeting 16 -Oct-2010 CERN Massimiliano Ferro-Luzzi 1

Programme for VDM measurements Friday Oct 15 Phase II: VDM scans proper 13: 43

Programme for VDM measurements Friday Oct 15 Phase II: VDM scans proper 13: 43 14: 58 Started IP 8 vdm scans Finished IP 8 vdm scans 15: 18 16: 17 Started IP 5 scans Finished IP 5 scans 16: 31 17: 50 Started IP 2 scans Finished IP 2 scans 9: 00 meeting 16 -Oct-2010 IP 5: +1 hour Oct 1 CERN Massimiliano Ferro-Luzzi 2

Programme for VDM measurements Friday Oct 15 Phase III: complementary measurements 17: 55 18:

Programme for VDM measurements Friday Oct 15 Phase III: complementary measurements 17: 55 18: 05 Started IP 8 length scale calibration Finished IP 8 length scale calibration 18: 10 18: 26 Started IP 5 length scale calibration Beam dump LBDS vac gauge off ? ? ? . . . one plane done, other plane just started Could not do (30 minutes more!): q longitudinal scan q Simon’s check of parallel IP optimisation q and ALICE length scale calibration (no Silicon tracker) 9: 00 meeting 16 -Oct-2010 CERN Massimiliano Ferro-Luzzi 3

Overview whole programme CMS scans LHCb scans ALICE scans 9: 00 meeting 16 -Oct-2010

Overview whole programme CMS scans LHCb scans ALICE scans 9: 00 meeting 16 -Oct-2010 CERN Massimiliano Ferro-Luzzi 4

Overview all scans LHCb scans 9: 00 meeting 16 -Oct-2010 CMS scans CERN ALICE

Overview all scans LHCb scans 9: 00 meeting 16 -Oct-2010 CMS scans CERN ALICE scans Massimiliano Ferro-Luzzi 5

LHCb scans 9: 00 meeting 16 -Oct-2010 CERN Massimiliano Ferro-Luzzi 6

LHCb scans 9: 00 meeting 16 -Oct-2010 CERN Massimiliano Ferro-Luzzi 6

CMS scans 9: 00 meeting 16 -Oct-2010 CERN Massimiliano Ferro-Luzzi 7

CMS scans 9: 00 meeting 16 -Oct-2010 CERN Massimiliano Ferro-Luzzi 7

ALICE scans 9: 00 meeting 16 -Oct-2010 CERN Massimiliano Ferro-Luzzi 8

ALICE scans 9: 00 meeting 16 -Oct-2010 CERN Massimiliano Ferro-Luzzi 8

Did it go well ? q Phase I: expected ~3 hours , took ~7

Did it go well ? q Phase I: expected ~3 hours , took ~7 hours (3 ¾ hours lost by Pt 8 trip) q Phase II and III: What was originally planned to take ~5 ½ hours of stable beams was compressed into ~ 4 ¾ hours – (excluding what could not be done due to dump) q Beams were good, some more ghost charge (satellite bunches) than usual ? – should not be a problem for this time (on the contrary? ) 9: 00 meeting 16 -Oct-2010 CERN Massimiliano Ferro-Luzzi 9

Summary q Very good beam conditions (emittance, charge, special pattern…) – but 3 -4

Summary q Very good beam conditions (emittance, charge, special pattern…) – but 3 -4 h delay du to pt 8 trip q Completed all VDM q Excellent support and participation from BI, OP, ABP, … – online indications that beam current errors are small q Still to do: – length scale calibrations in IP 5 and IP 2 § can be done in physics – longitudinal scan tests § can be done in physics, but better test once in a low intensity fill ? 9: 00 meeting 16 -Oct-2010 CERN Massimiliano Ferro-Luzzi 10