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v3.3.5
Tony:
- started with JETI40 at nominal 16.5 GeV
- should we quote the peak or average \xi? —> can translate peak to average
- what’s the size?
- what’s the multiplicity? probably need to keep the rule o thumb that we have in total ~100k tracks
- need the Brems spectrum from Sasha (high priority)
Sasha:
- status of jobs?
- 1 billion produced already
- agree to go up to 10^10 with this production and then stop to check integrity.
- then update the model (missing supports for all systems, longer fwd spectrometer (30 cm), target material at the end of the beampipe, windows material before the IP detectors, flex cables of the staves, angles of Cherenkovs and LYSOs, profiler location and material, calo crate, proper B-field map, etc.)
- small inconsistencies found for the IP chamber but not dramatic —> fixed
- fwd spectrometer:
- why do we put the Cherenkovs with an angle?
- LYSO should be longer —> ~30 cm
- still room to play with the G4 exact configuration of how G4 simulates the interaction within the large passive materials (shielding etc).
- include the beam halo in the simulation.
- output isn’t big
- check with Louis the size and weight of the shielding since it is both expensive and too heavy
Kyle:
- need to estimate the dose (1Gy limitation)
- estimate as ~1e-3 Gy so big problem? to be checked quickly
- here it will be important to minimise the thickness of the target to reduce the rates
- what’s the distance between the detectors and the shielding?
- keep discussing with Maryna and Sasha to make sure everything is coherent (geometry, materials, etc.).
- check what is the source of the large dose (can check in FLUKA the directions)
- profiler downstream the fwd spectrometer:
- important for angular distributions.
- will be some sort of a scintillating screen
- probably after the shielding?
Louis:
- possible to get the B-field maps in the next ~month by DESY people
- check if there’s simulation so we can do extrapolations later
- what we need:
- B-field maps for 1, 1.6 and 2 T (what granularity?)
- stability of current (and hence B-field)