1. Pedro Arce GAMOS primer 1 Exercise 0: installation Open a web browser in Go to GAMOS web page http://www.google.com : search for Geant4  Applications  Medical  GAMOS Or http://fismed.ciemat.es/GAMOS  Go to Download  Register yourself as New User  Get the scripts of GAMOS.5.0.0 (right-click and save)  Leave the web browser and go to the terminal window in VMWARE  sh download_scripts  Install it  cd scripts  sh installGamos.sh $HOME/gamos (or choose a different directory name)

2. Pedro Arce GAMOS primer 2 Running GAMOS Type in your terminal: cd $HOME/gamos/GAMOS.5.0.0 source config/confgamos.sh cd tutorials/Primer To run GAMOS: gamos exercise0a.in (output will be in gamos.log, errors in gamos_error.log ) edit gamos.log

3. Pedro Arce GAMOS primer 3 Start your example Create a new directory: cd.. mkdir myExample1 cd myExample1 Copy files from Primer: cp../Primer/exercise0a.in. cp../Primer/exercise0.geom.

4. Pedro Arce GAMOS primer 4 Visualising geometry Edit your input file (test.in) Add one line before ‘/run/beamOn 10 ’ /control/execute../../examples/visVRML2FILE.in It will produce a VRML file with the geometry (g4_00.wrl) and a VRML file with the geometry and tracks (g4_01.wrl) To visualise these files, download visualiser (there are many, many VRML visualisers in the web..)

5. Pedro Arce GAMOS primer 5 Visualise histograms Use ROOT software Create some histograms Add one line before ‘/run/beamOn 10 ’ /gamos/userAction GmTrackDataHistosUA Open the file. Type: root GmTrackDataHistosUA.root new TBrowser Select ‘ROOT Files’  ‘GmTrackDataHistosUA.root’  any histogram… (click twice with left-button)