CORSIKA 8 general meeting

Thursday Sep 29, 2022, 5:00 PM → 6:30 PM Europe/Berlin

Zoom

Tim Huege (KIT)

Connect to ZOOM meeting room:

https://zoom.us/j/99307684644?pwd=SlFxOXcvWHBCcEM1WVY2TU9DOXJmQT09 

 

1 Simulations with newest PROPOSAL version

Speaker: Jean-Marco Alameddine (Technische Universität Dortmund)

proposal_7.4.2.pdf

• several improvements in PROPOSAL, see slide 2
• can now go to lower energies, 500 keV proven to work
  • longitudinal profiles get very sensitive to multiple scattering at these energies
  • with multiple scattering on agreement with C7 well below 5%
  • charge excess also fits very well then
  • photons look off, however (was already the case in ICRC2021, should re-check)
• might be possible to go as low as 100 keV, requires to use only-stochastic photon simulation, seems to give same results with same runtime
• Nikos is running some radio showers to check

2 Update on the CI infrastructure

Speaker: Dr Lukas Nellen (I de CIencias Nucleares, Universidad Nacional Autonoma de Mexico)

• Lukas has worked on getting Conan out of CMake
• This revealed a problem: The older Conan coming with the container cannot build the new packages any more
• Lukas is building a new container that has an up-to-date Conan, that might already fix the CI
• He is looking into further structural improvements related to caching of built packages, in particular an easy way to produce new container versions with cache for updated packages either directly from the CI or easily locally
• Lukas will now also be able to provide Apptainer containers (formerly known as Singularity containers)
• He will investigate also improved compatibility with other operating systems
• Jean-Marco asks if users will be able to use their own packages instead of Conan, but Lukas advises against it

3 Using CORSIKA8 to do neutrino induced cascade simulations in sea water

Speaker: Fan Hu (Peiking University)

Application of CORSIKA 8 in neutrino telescope.pdf

• they use C8 to simulate cascades in water for the TRIDENT experiment
• electromagnetic showers look good
• hadronic shower (pi+ induced) seems to have 4% of unaccounted energy, could be a problem in the EnergyLossWriter
• they have quantified the energy loss of muons, to be compared with known values
• they also checked showers going from air into sea water, need to validate
• they built an Earth model in C8 (preliminary Earth reference model) and can start neutrino-induced showers
• they have run into some problems (slide 15, 16)
• made some modules, will open merge requests in the GitLab