Persisting GEANT geometry and output

• This simple command during the session will open an output file:

• gfile o my_file.fz

• After that, subsequent events shall be recorded in the file. The geometry will also be persisted in a transparent manner.

• A neat exercise: define a geometry, create a few events with kinematic tracks, save them in a file, then quit GSTAR.

• Reopen the file in a fresh GSTAR/staf session using the command:

• gfile p my_file.fz

• And inspect the geometry using the command discussed above. Also, issue triggers and use the dhits command to look at the hits.

Notes: