Overview of 2012 MIB in ALICE. A. Alici (INFN), A. Di Mauro (CERN) LBS #43, 28/01/2013. Introduction.
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A. Alici (INFN), A. Di Mauro (CERN)
LBS #43, 28/01/2013
With proper conditioning/bakeout acceptable behaviour, good hopes for post LS1…
TDI p generally > 10E-8 mbar
ALICE magnets polarity reversal
Example of large P bump, no data taking in ALICE (bkgd rate >200 KHz during all fill)
First FILL with modified injection
Start data taking at SB declaration
Correlation between Left bkgd rate measured by V0 trigger detector and product of beam intensity times sum of LSS2 pressure.
z = + 6 m, r = 10 cm
z = -18.5 m, r=10 cm
rin=8 cm rout=100 cm
rin=8 cm rout= 76 cm
Two arrays of scintillator counters (V0A and V0C). Time spectra allow beam-gas events rejection
V0A+V0C ≈ 14.3ns
V0A-V0C ≈ 8.3ns
Beam background from beam2
V0A+V0C ≈ -8.3ns
V0A-V0C ≈ -14.3ns
Beam background from beam1
V0A+V0C ≈ 8.3ns
V0A-V0C ≈ 14.3ns