anchor.diff:    use mod_common_track
     use mod_common_da
     use numerical_constants, only : c5m4
  +  use coll_db
   
     implicit none
   
  
positive.code: !-----GRD-----GRD-----GRD-----GRD-----GRD-----GRD-----GRD-----GRD-----GRD-----
  !-----                                                                   -----
  !-----    NEW BLOCKS PROVIDED FOR THE COLLIMATION STUDIES VIA SIXTRACK   -----
  !-----                                                                   -----
  !-----        G. ROBERT-DEMOLAIZE, October 27th, 2004                    -----
  !-----                                                                   -----
  !-----GRD-----GRD-----GRD-----GRD-----GRD-----GRD-----GRD-----GRD-----GRD-----
  
  ! Useful names for future reference in the code:
  !GRD Guillaume Robert-Demolaize
  !RA  Ralph Assmann
  !TW  Thomas Weiler
  !CB  Chiara Bracco
  !SR  Stefano Redaelli
  !RB  Roderik Bruce
  !DM  Daniele Mirarchi
  !YIL Yngve Inntjore Levinsen
  !CT  Claudia Tambasco
  
  module collimation
  
  
negative.code:   use mod_hions
    use mod_alloc
    use mod_units
    use mod_ranlux
  
    implicit none
  
  