Simulation and Analysis TF

Tuesday 13 Jul 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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Assaf:
- what’s the gain? —> 40 cm in the x dimension!
- we can shrink it also in the z dimension? —> yes, can cut about 30 cm
- do you have a design for the needle so Sasha can put it in the model? —> yes, it is approximately in the middle.
- cad will be uploaded in ~10 days
- outgoing beam is away from the incoming —> would need 2 pipes —> discuss with Louis and Ragendra.

Tom:
- parameters are confirmed (like the CDR with minor changes)
- need the BSM runs (10/6.5 um and 120 fs) —> just in phase1
- change 50% to 40% losses? (40% arrive at the focus) —> check with Matt!
- e-beam same (16.5 GeV, shape, etc) —> add also 14 GeV —> need a proposal table and then start generating

 

Sasha:
HDF5 format:
- in MeV and m? —> can change to GeV and um? —> doesn’t matter
- particle ID missing? —> will be available in the next data
B-field?
- will use the approximation (with exponentials, not errf)
- what if we do we have more components of the field? —> we have a measurement for the other fwd magnet?
- will do a 3D double-sided turn-on/off function in x,y,z with our best guesses
Shielding near IP detectors:
- could be that we need to make the beampipe smaller
- check radiation level at the e-tracker when it is down —> when the data becomes available
- tracker spaceframe was stainless still
Shielding walls:
- will move to 80 cm concrete blocks
- the 2 upstream walls should be changed from scratch —> will discuss with Louis this week
- window is 200 um? —> Kyle will check the damage to the Aluminium with FLUKA (concern that it’d be the same as for the Kapton?)
- alls small elements (bellows etc) are implemented?
- profiler? —> have drawings from Marco
- target chamber? —> not designed 
- Cherenkov and screen will be updated
- IP chamber as discussed today
- beam support —> not 
- BSM sensitive volumes
- base platform from concrete (1.5 m high) —> then reduce the size of the feet of the components.
- some other bits (see my slides from Apr 14 - also linked to this agenda in the intro)
Readiness?
- geometry parts are not complicated ~1-2 weeks wherever we have the drawings
- should launch something preliminary by end of July with the best snapshot and then

10:00 → 10:10 Intro

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

Noam_model_update_14042021.pdf

10:10 → 10:20 IP box redesign

LUXE -Update chamber AL1.pptx.pdf

10:20 → 10:40 PTARMIGAN updates (standing item)

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

ptarmigan_update_13July.pdf

- Check 50% loss with Matt

- Table of proposed xi vs e-beam energy + BSM photon-generation optimisation scan

10:40 → 11:40 GEANT4 model updates (standing item)

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

luxe_sim_update_13072021.pdf

11:40 → 12:00 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))