Radiation studies with FLUKA

Radiation studies

Radiation levels in the LHCb cavern have been calculated with FLUKA. For information on the software refer to the official FLUKA web site.

Old results for the  "LHCb-Classic-minus" layout (May 2002) can be found here.

Present results are obtained for the experimental layout corresponding to "LHCb-light". Primary particles statistics corresponds to ~35000 events. Comments about the geometry are here.

1. X view of the LHCb set-up
2. Y view of the LHCb set-up
3. Closer Y view of the LHCb set-up
4. Detailed X view of the VERTEX+RICH1 region
5. Detailed Y view of the VERTEX+RICH1 region

Detailed explanations of the simulation conditions and results available (also instructions how to look at the data yourself) can be found here. 

The tables below contain links to the results (postscript and maps) in different locations of the LHCb experimental set-up regarding doses&fluences,  spectra and maps of statistical accuracy (rms/average) for selected locations. 

  Maximum and average radiation levels for 10 years of LHC operation (including safety factor 2) in selected regions are collected in a summary table.

Doses&Fluences

(*) Explanation of the  way, how  1 MeV neutrons equivalent fluence  for Si is calculated can be found here 

(**) |X| > 60cm, |Y| >30 cm.

(A) The floor map has been obtained with the old bunker structure. Average numbers with the latest version are in the summary table.

Spectra

Statistical accuracy (rms/average)