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Nathaly - Barrel Crystal/Glass ECal
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- first simple version of homogeneous PbWO2 calo implemented with 20cm depth
- small code problems (no hits seen) -> Nico suggested fix
- first study to estimate whether shower is contained in calo with 5GeV electrons
- check whether higher energetic particles don't punch through (unlikely)
- next steps:
- fix code issues
- check depth of Sci-glass version (~40cm)
- implement tower geometries - will most likely need to be projective
- in contact with PANDA calo experts to possibly port GEANT code for that together with CORE collaborators
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Pu-Kai - Electron End-cap Crystal/Glass ECal
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- first version of 2 ring EEEMC geometry implemented
- still to large gaps needs optimization, remove overlaps with other detectors
- what is best geom version: square or ring in center?
- Tanja will send mechanical model for support structure and calo
- which plane should be aligned front/back (maybe not same plane in Z but R?)
- do we need projective calo in this region, how is that correlated to crystal size?
- first reco:
- pointing to projectivity problems?
- cluster center corrections correctly applied? projection value might not be at correct Z position for clusters
- how many cells/cluster vs eta?
- could use event-evaluator to do reclusterization yourself (with different algorithms), quicker for debugging
- how precisely do we need to know the cluster position?
- next steps:
- continue integration: fix overlaps, reduce gaps...
- push code upstream to check with other detectors (mod RICH, TTL...)
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Craig - Calorimeter re-use
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- Overview of considered sampling technologies for EIC calos
- sPHENIX W/SciFi chosen to have low sampling fraction, increasing that could bring similar calo to const. 1.7% and stoch. 7.1%/sqrt(E) about 2x as deep though
- diff shashlyk technologies could meet reso as well, however also about 2x depth of sPHENIX W/SciFi
- sPHENIX ECal re-use (13-15%/sqrt(E)+3%, read-out in front, 2.5cm towers)
- SiPMs will only last 3-4years -> need replacement for EIC
- stochastic term partially due to un-uniformities in light collection and readout (only 23% coverage on top of light-guide)
- main argument against CEMC e/pi separation with those parameters would only be ~10^-2 in full detector setup would need 10^-3 - 10^-4
- would imply significant improvement in other det. technologies if we stay with this calo
- reso could be improved to 12-13% /sqrt(E)+2.5% if read-out more uniform
- read-out improvements would not only improve const term, but also stochastic term, as that is still partially influenced by errors on const. term
- possible readout changes
- same light guide, replace SiPMs with 6x6mm version 23%->100% coverage of light guide end
- cut down light guide to cover entire area with 6x6 of 6x6mm SiPMs
- read out every fiber or smaller bunches?
- test-beam for read-out changes?
- could test 1-2 blocks right now -> wouldn't provide full answer
- lacking man power (planning, electronics, ...)
- should consider test in near future
- funding for buying SiPMs?
- PHENIX ECal
- 1500 modules now used by STAR re-equipped with SiPMs
- not projective, large tower size for forward usage
- projectivity would mainly help between 1-2 \eta
- if granularity for readout needs to be changed ->
- fibers need to be pulled and new ones threaded - feasible?, at what cost?
- W/Cu shashlik
- would be ready for test beam, but needs more SiPM and corresponding electronics
- could meet specs in forward
- E864 Had-cal
- needs more investigation whether it can be re-used in forward for E- or H-Cal
- Does longitudinal separation help
- Yes
- Can we use light collection time to partially separate had and em showers in Ecal?
- Collect light from different depth of calo?
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