# AnasenG4 Geant4 Simulation

This folder contains a minimal Geant4 application that: 
- builds the ANASEN detector geometry,
- adds a helium target volume,
- generates outgoing proton events from an `18Ne + 4He` alpha/p reaction using the external `ClassTransfer` reaction model,
- and propagates the particles with the Geant4 `FTFP_BERT` physics list.

## Build

```bash
cd /home/jamesszalkie/anasen/Armory/AnasenG4
rm -rf build
mkdir build
cd build
cmake ..
make -j4
```

## Run

```bash
cd /home/jamesszalkie/anasen/Armory/AnasenG4
./build/AnasenG4 macros/run.mac
```

## Notes

- The reaction generator uses `/home/jamesszalkie/anasen/Armory/mass20.txt` for isotope mass lookups.
- You can also run the interactive visualization macro:

```bash
./build/AnasenG4 macros/init_vis.mac
```
