/** 
   * @brief Setter of the simulation options
   * @detail This string can be:
   * ""                          -> default settings full setup
   * "day1"                      -> Setup for day1 experiment: no GEM, FTS1234, NO DISC, NO RICH
   * "gem" (added to "day1")     -> Setup for day1 experiment with 3 GEM planes
   * "fts1256" (added to "day1") -> Setup for day1 experiment with FTS1256 insted of FTS1234
   * Example: "day1+gem+fts1256" means day1 setup + GEM planes + fst1256 
   */