  This article generalizes Schwinger's mechanism for particles production in
the arbitrary finite field volume. McLerran-Venugopolan(MV) model and iterative
solution of DGLAP equation in the double leading log approximation for small x
gluon distribution function were used to derive the new formula for initial
chromofield energy density. This initial chromofield energy is distributed
among color neutral clusters or strings of different length. This strings are
stretched by receding nucleus. From the proposed mechanism of string
fragmentation or color field decay based on exact solution of Dirac equation in
the different finite volume, the new formulae for esimated baryon kinetic
energy loss and rapidity spectrum of produced partons were derived.
