This web page contains information relevant to simulations of experimental background conditions in the LHC. We will also try to keep it updated with links to available simulation data.
If you find information missing on this web page, or you have suggestions of any kind, please do not hesiate to contact one of the authors, Helmut Burkhardt, or Yngve Inntjore Levinsen.
LHC Background Study group , meetings on indico
LHC Beam Commissioning Working Group (deprecated)
LHC Performance Committee (LHC-PerC)
LHC Machine Protection Working Group (LHC-MPWG)
LHC Commissioning Working Group (LHCCWG)
LHC Experiment Machine Interface Committee (LEMIC)
LHC Experiment Accelerator Data Exchange Working Group (LEADE)
TS LEA Joint LHC Machine Experiments Workshops
Workshop on Experimental Conditions and Beam Induced Detector Backgrounds, CERN, April 2008
Programs and output are kept in /afs/cern.ch/eng/sl/bkg-sim
The vacuum group is providing pressure readings for each LSS, contact Giuseppe to get access.
The table below shows the baseline parameters for 3.5 TeV background simulations for 2010 operation.
| Variable | Value | Unit | Experiment |
|---|---|---|---|
| Energy | 3.5 | TeV | |
| Bunch intensity | 9E10 | protons | |
| Num.bunches | 156 | 1/beam | |
| β* | 2 | m | ATLAS |
| β* | 2 | m | ALICE |
| β* | 2 | m | CMS |
| β* | 2 | m | LHCb |
| Bunch length | 5.41 | cm | |
| RF voltage | 16 | MV | |
| ΔE/E | 7.14E-4 | ||
| εnom | 3.75 | μm | |
| Ext.angle | 0 | μrad | ATLAS |
| Ext.angle | 0 | μrad | ALICE |
| Ext.angle | 0 | μrad | CMS |
| Ext.angle | 0 | μrad | LHCb |
| Separation | 0 | μm | ATLAS |
| Separation | 0 | μm | ALICE |
| Separation | 0 | μm | CMS |
| Separation | 0 | μm | LHCb |
| Exp.magn | Full power | ATLAS | |
| Exp.magn | Full power | ALICE | |
| Exp.magn | Full power | CMS | |
| Exp.magn | Full power | LHCb | |
| Polarity | +1 | ALICE | |
| Polarity | -1 | LHCb | |
| Collimators | Intermediate settings | ||
The baseline for simulations in 2011 are not defined yet.