Add beamfiless for more gas target system in 2024 SMOG2
More gases are expected to inject in SMOG2 cell during 2024 data-taking, such as: H2, D2, O2, Ne. At the meanwhile, Kr, Xe, Ni are also interesting to look at.
The pile-up value can be calculated with expected gas luminosity estimation(LHCb-PUB-2018-015), and Xsection estimated from heavy-ion generators(EPOS, HIJING as reference).
The expected pile-up values of these gases are:
+----------+----------------------------------+-----------------------------------+-------+-------+
| GasType | FixedTargetLuminosity(cm^-2s^-1) | Inelastic Cross-section(mb)(cm^2) | nu | mu |
+----------+----------------------------------+-----------------------------------+-------+-------+
| ['pH2'] | 2.5e+28 | 3.928e-26 | 0.087 | 0.061 |
| ['pD2'] | 1.25e+28 | 7.164e-26 | 0.08 | 0.056 |
| ['pAr'] | 7.5e+27 | 6.169e-25 | 0.411 | 0.288 |
| ['pKr'] | 5e+27 | 1.005e-24 | 0.447 | 0.313 |
| ['pXe'] | 3.75e+27 | 1.337e-24 | 0.446 | 0.312 |
| ['pHe'] | 2.167e+28 | 1.174e-25 | 0.226 | 0.158 |
| ['pNe'] | 1.25e+28 | 3.867e-25 | 0.43 | 0.301 |
| ['pN2'] | 6.25e+27 | 3.022e-25 | 0.168 | 0.118 |
| ['pO2'] | 6.25e+27 | 3.337e-25 | 0.185 | 0.13 |
| ['PbAr'] | 8.065e+25 | 3.297e-24 | 0.024 | 0.017 |
+----------+----------------------------------+-----------------------------------+-------+-------+The realistic value will be tuned after the luminosity measurement during the data-taking. At the time being, these expected values are used for studying the trigger rates.
For more details, you can kindly find the slides at IFT meeting: https://indico.cern.ch/event/1401366/contributions/5904530/attachments/2834974/4953942/PileUp_SMOG2_IFTApril10.pdf
After the beamfiles are merged, new collision types in LbMCSubmit will be added in. (cc @admorris )