Simulation and Analysis TF

Tuesday 11 May 2021, 10:00 → 13:00 Europe/Berlin

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:

 

Daniel:

- went to 900 nm wavelength —> a bit smaller energy of the Comptons

- electrons emittance is the dominant contribution to the uncertainty

- 1 ps pulse duration? —> this is OK.

- need to know what is the optimal spot size 

- slide 16: transverse momentum doesn’t look too small and it will affect the reco of e+e- pairs? —> will need to see this with the pairs coming from the main IP.

- don’t we have Comptons which produce pairs in the ICS IP? —> no, xi is too small.

- Beate:

  - focusing to different sizes at the ICS IP can be done but the magnets have to be strong enough but ~5-20 um seems OK. —> need a talk from the machine person (focusing options…)

  - where do we actually do the focusing of the electron beam? —>  ~20 m upstream the LUXE setup.

- Sasha:

  - in the case of the target there’s also multiple scattering so there’s no clear correlation between the focusing and the number of pairs. (on the question where do focus the beam - the main IP or the ICS IP?)

  - Sasha has the function which generates the electrons with correlated position and momentum —> please share.

 

 

Tom:

- I’d wait with large scale submissions (more BXs etc) except for what’s needed for the CDR fixes

- 

 

Arka: 

- add the relative difference in angle before and after the window

1 Intro

Speakers: Beate Heinemann (DESY and Freiburg University), Daniel Seipt (Helmholtz Institut Jena), Noam Tal Hod (Weizmann Institute of Science)

2 PTARMIGAN updates (standing item)

Speakers: Daniel Seipt (Helmholtz Institut Jena), Thomas Blackburn (FLC (FLC Fachgruppe ANA)), Tom Blackburn (University of Gothenburg)

luxe_ics_sims_update.pdf

ptarmigan_update_11May.pdf

3 GEANT4 model updates (standing item)

Speakers: John Hallford (UCL), Maryna Borysova (FLC (Experimente an Lepton Collidern)), Oleksandr Borysov (DESY)

4 Data format updates (standing item)

Speakers: Federico Meloni (ATLAS (ATLAS SM and Beyond)), Oleksandr Borysov (DESY)

5 AOB

Speakers: Arka Santra (FLC (Forschung an Lepton Collidern)), Beate Heinemann (DESY and University of Freiburg (Germany)), Daniel Seipt (Helmholtz Institut Jena), Federico Meloni (ATLAS (ATLAS SM and Beyond)), Gianluca Sarri (Queen's University Belfast), John Hallford (UCL), Kyle Fleck (QUB), Louis Helary (FTX (FTX Fachgruppe SLB)), Marco Bruschi (INFN and University of Bologna), Maryna Borysova (FLC (Experimente an Lepton Collidern)), Matthew Wing (UCL), Noam Tal Hod (Weizmann Institute of Science), Oleksandr Borysov (DESY), Ruth Magdalena Jacobs (ATLAS (ATLAS SM and Beyond)), Shan Huang (Tel Aviv University), Thomas Blackburn (FLC (FLC Fachgruppe ANA))

SignalPositrons_AlandKpWindowComparison_May11_2021.pdf