text: #pragma once
  
  struct photon_origin_data {
      float pos_x;
      float pos_y;
      float pos_z;
      float time_g;
      float mom_x;
      float mom_y;
      float mom_z;
      float kin;
      unsigned int ev_num;
      char par_nm[8];
      char proc_nm[8];
  };
  