Simulation and Analysis TF

Europe/Berlin
Description

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:
- define what is beam according to 5sigma * 0.1%(spread)
- send Matthew the new bar plots 

Tony:
- last meeting!!! (will keep producing in the coming weeks)
- overall HICS normalisation was wrong by a factor of ~4
   —> Tom will check the new MC with the theory
   —> what was wrong? —> numerical factor
- old data moved to a superseded dir
- OPPP rate is valid up to xi=5.5 since for xi=6 it is artificially truncated sum on harmonics
   —> thanks to Daniel for bringing this up!
   —> phase2 is much better since with larger spotsize, the beam sees a more constant xi.
   —> JETI40 is anyhow below xi=5.5 but phase2 will be affected.
- how can we run the code?
- will kill the small-spotsizes jobs, fix the lookup table and resubmit later
- will prioritise the number of events and spot-sizes etc (also ask Maryna for the large spot size)

Sasha:
- HICS vs Brems plot is very illustrative —> need more stat (signal, not G4).
- added also diagnostics for secondary particles per 
- will also add the BX_id to the trees
- can these be added to the HitTracks tree as well?

Maryna:
- will produce the integrated numbers
- please move to mm2 everywhere
- for the IP positrons system in slide 6, we need to start with the beam-only simulation
- slide 4: plot look weird since it has to have a central band —> could be a wrong detid
- for the IP CKV+LNX please use the runs where these detectors are in the correct position (where the beam does not cross them!)

Kyle:
- Ruth: make the \lambda Gaussian distributed rather than uniform 
- Ruth: the stat-uncertainty should be taken properly if many BXs are entering the calculation
- check binning of the response
- can tune the sigma value

Ruth:
- B-field uncertainty can be ~1% if we say that we really have a detailed and accurate map (say that this is a requirement). The total uncertainty should be ~2.5% and then each component should be ~1%.
- increase the y-scale in slide 7 plots (top and bottom)
- where does the kink-shape-assumption comes in the
- check also a better granularity assumption
- can look at the photon spectra in bins of true-xi (starting from the stdhep file - carefully!)

Arka:
- show the origin of the 2 species (matched and non-matched)
- what are the errors going in the SVD?

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