Seth R. Johnson

- [ ] Automatically resize track initializer vector when the capacity is exceeded (remove manual `initializer_capacity` input) - [ ] Keep track of events so that `max_events` isn't needed -...

With https://github.com/celeritas-project/celeritas/pull/685 we have the first case of detecting and killing a particle due to an erroneous condition. We'll probably have other cases (surface crossings, convergence issues, ...) that might...

Improve CI infrastructure

2

- ~~[Dockerhub is getting rid of the free teams tier](https://www.docker.com/blog/we-apologize-we-did-a-terrible-job-announcing-the-end-of-docker-free-teams/) but maybe our images will stay live?~~ Apparently docker is [no longer ending it](https://www.docker.com/blog/no-longer-sunsetting-the-free-team-plan/) - Kokkos builds block the single...

Use geometry length scale to determine a minimum step

8

The single-precision support added in #988 fails in many cases because the step size is small enough that the floating point position *does not change* over the course of a...

Interrupting the Geant4 offload call in a multithreaded Geant4 context causes one thread to register the interrupt, but it needs to be able to pass control to another thread so...

Improve device initialization for eventual CMSSW use

3

We've never had a completely satisfactory way of handling device initialization: - `celeritas::device` is a global variable that's allowed to be initialized exactly once - The CUDA runtime API device...

Add energy deposition and path length scoring

1

@helen-brooks See e.g. [Geant4 scoring tutorial](https://www.slac.stanford.edu/xorg/geant4/SLACTutorial14/Scoring1.pdf) or [OpenMC tally documentation](https://docs.openmc.org/en/stable/methods/tallies.html)

Generalize along-step kernels

4

Currently we use the same along-step kernel (including slowing down and field propagation) for all particle types, all energies, all regions. It's probably silly to use the field propagator to...

Polish "demo loop" app into "celer-sim" standalone executable

1

- [x] Replace diagnostics with actions - [ ] Use `omnutils` as a front end for preprocessing input into .json file quality of life improvements: - [ ] add `-o`...

## Physics - [x] Add more granular physics selection to GeantSetup (#744) ## Output Replace SD output: previously was meant to replicate HGCal requirements, but now we want to directly...