class AliZDCv4: public AliZDC

 Default constructor for Zero Degree Calorimeter

 Standard constructor for Zero Degree Calorimeter


 Check that DIPO, ABSO, DIPO and SHIL is there (otherwise tracking is wrong!!!)

 Create the geometry for the Zero Degree Calorimeter version 2
* Initialize COMMON block ZDC_CGEOM
*

 Create the beam line elements

 Create the various ZDCs (ZN + ZP)

 Create Materials for the Zero Degree Calorimeter

 Create entries for alignable volumes associating the symbolic volume
 name with the corresponding volume path. Needs to be syncronized with
 eventual changes in the geometry.

 Read light tables for Cerenkov light production parameterization

 Routine called at every step in the Zero Degree Calorimeters