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Simulation and Analysis TF

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Topic: LUXE simulation and analysis TF
Meeting ID: 916 7025 7822
Password: 434044
Time: This is a recurring meeting Meet anytime

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Intro:
- low-E electrons hitting the tracker will 
- need to measure 0.01 signal positrons per BX 
- asymmetry is due to the photoelectric effect but we should
- for the high-flux areas, the sum of energy is important (not necessarily the rates) —> can 

Arka:
- try again to see where the photons are coming from in the calo —> change in the slides
- how many electrons are below ~1 keV? (no hits below that?) 1 keV per 1 u ?
- what is the occupancy per unit area (per pixel)?
- remove the spiking regions by hand

Tony:
- HICS rate was summed over the hard photons with a cut-off set at 10 —> for high xi, need to sum up to N~√xi but doing now the 99% of the true rate.
  - affects the e+laser setup but do not have a big difference for 8 um spot size but should see a difference for 3 um —> more positrons!
  - new data is labeled as provisional
- new mesh —> relevant only for the very large xi values, taking much longer to produce.
- looking also at the long pulses for phase2 in the ideal cases.
- did the new mesh solve the discontinuities in Beate’s slides? —> still need to do the fine-mesh study.

Sasha:
- Pb dump will work very well —> remove these bkgs by hand for now, in the existing simulation.
- the fwd beampipe solution will not have a large-scale simulation campaign - we can rely on the studies/statements from Maryna that this will further reduce by a lot the bkgs as well as the signal which is produced in the air.
- John: need space to put the optics so the LANEX cannot move much more towards the Cherenkov. But the distribution will be more condensed the closer you go to the vacuum chamber —> need to crosscheck.
- Arka should look at the beam-only simulation —> see Sasha’s table

Kyle:
- scale difference will need to be understood but the shape is well reproduced
- the absolute scale can come from the other subsystem.

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